libguile/posix.c

   1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public License
   5  * as published by the Free Software Foundation; either version 3 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301 USA
  17  */
  18
  19
  20 \f
  21 #ifdef HAVE_CONFIG_H
  22 #  include <config.h>
  23 #endif
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <errno.h>
  28 #include <uniconv.h>
  29
  30 #ifdef HAVE_SCHED_H
  31 # include <sched.h>
  32 #endif
  33
  34 #include "libguile/_scm.h"
  35 #include "libguile/dynwind.h"
  36 #include "libguile/fports.h"
  37 #include "libguile/scmsigs.h"
  38 #include "libguile/feature.h"
  39 #include "libguile/strings.h"
  40 #include "libguile/srfi-13.h"
  41 #include "libguile/srfi-14.h"
  42 #include "libguile/vectors.h"
  43 #include "libguile/values.h"
  44
  45 #include "libguile/validate.h"
  46 #include "libguile/posix.h"
  47 #include "libguile/gettext.h"
  48 #include "libguile/threads.h"
  49 \f
  50
  51 #ifdef HAVE_STRING_H
  52 #include <string.h>
  53 #endif
  54 #ifdef TIME_WITH_SYS_TIME
  55 # include <sys/time.h>
  56 # include <time.h>
  57 #else
  58 # if HAVE_SYS_TIME_H
  59 #  include <sys/time.h>
  60 # else
  61 #  include <time.h>
  62 # endif
  63 #endif
  64
  65 #ifdef HAVE_UNISTD_H
  66 #include <unistd.h>
  67 #else
  68 #ifndef ttyname
  69 extern char *ttyname();
  70 #endif
  71 #endif
  72
  73 #ifdef LIBC_H_WITH_UNISTD_H
  74 #include <libc.h>
  75 #endif
  76
  77 #include <sys/types.h>
  78 #include <sys/stat.h>
  79 #include <fcntl.h>
  80
  81 #ifdef HAVE_PWD_H
  82 #include <pwd.h>
  83 #endif
  84 #ifdef HAVE_IO_H
  85 #include <io.h>
  86 #endif
  87 #ifdef HAVE_WINSOCK2_H
  88 #include <winsock2.h>
  89 #endif
  90
  91 #ifdef __MINGW32__
  92 /* Some defines for Windows here. */
  93 # include <process.h>
  94 # define pipe(fd) _pipe (fd, 256, O_BINARY)
  95 #endif /* __MINGW32__ */
  96
  97 #if HAVE_SYS_WAIT_H
  98 # include <sys/wait.h>
  99 #endif
 100 #ifndef WEXITSTATUS
 101 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
 102 #endif
 103 #ifndef WIFEXITED
 104 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
 105 #endif
 106
 107 #include <signal.h>
 108
 109 #ifdef HAVE_GRP_H
 110 #include <grp.h>
 111 #endif
 112 #ifdef HAVE_SYS_UTSNAME_H
 113 #include <sys/utsname.h>
 114 #endif
 115
 116 #ifdef HAVE_SETLOCALE
 117 #include <locale.h>
 118 #endif
 119
 120 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
 121 # define USE_GNU_LOCALE_API
 122 #endif
 123
 124 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
 125 # include <xlocale.h>
 126 #endif
 127
 128 #ifdef HAVE_CRYPT_H
 129 #  include <crypt.h>
 130 #endif
 131
 132 #ifdef HAVE_NETDB_H
 133 #include <netdb.h>      /* for MAXHOSTNAMELEN on Solaris */
 134 #endif
 135
 136 #ifdef HAVE_SYS_PARAM_H
 137 #include <sys/param.h>  /* for MAXHOSTNAMELEN */
 138 #endif
 139
 140 #if HAVE_SYS_RESOURCE_H
 141 #  include <sys/resource.h>
 142 #endif
 143
 144 #include <sys/file.h>     /* from Gnulib */
 145
 146 /* Some Unix systems don't define these.  CPP hair is dangerous, but
 147    this seems safe enough... */
 148 #ifndef R_OK
 149 #define R_OK 4
 150 #endif
 151
 152 #ifndef W_OK
 153 #define W_OK 2
 154 #endif
 155
 156 #ifndef X_OK
 157 #define X_OK 1
 158 #endif
 159
 160 #ifndef F_OK
 161 #define F_OK 0
 162 #endif
 163
 164 /* No prototype for this on Solaris 10.  The man page says it's in
 165    <unistd.h> ... but it lies. */
 166 #if ! HAVE_DECL_SETHOSTNAME
 167 int sethostname (char *name, size_t namelen);
 168 #endif
 169
 170 /* On NextStep, <utime.h> doesn't define struct utime, unless we
 171    #define _POSIX_SOURCE before #including it.  I think this is less
 172    of a kludge than defining struct utimbuf ourselves.  */
 173 #ifdef UTIMBUF_NEEDS_POSIX
 174 #define _POSIX_SOURCE
 175 #endif
 176
 177 #ifdef HAVE_SYS_UTIME_H
 178 #include <sys/utime.h>
 179 #endif
 180
 181 #ifdef HAVE_UTIME_H
 182 #include <utime.h>
 183 #endif
 184
 185 /* Please don't add any more #includes or #defines here.  The hack
 186    above means that _POSIX_SOURCE may be #defined, which will
 187    encourage header files to do strange things.
 188
 189    FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
 190
 191    FIXME: Probably should do all the includes first, then all the fallback
 192    declarations and defines, in case things are not in the header we
 193    imagine.  */
 194
 195
 196
 197
 198 \f
 199
 200 /* Two often used patterns
 201  */
 202
 203 #define WITH_STRING(str,cstr,code)             \
 204   do {                                         \
 205     char *cstr = scm_to_locale_string (str);   \
 206     code;                                      \
 207     free (cstr);                               \
 208   } while (0)
 209
 210 #define STRING_SYSCALL(str,cstr,code)        \
 211   do {                                       \
 212     int eno;                                 \
 213     char *cstr = scm_to_locale_string (str); \
 214     SCM_SYSCALL (code);                      \
 215     eno = errno; free (cstr); errno = eno;   \
 216   } while (0)
 217
 218
 219 \f
 220 SCM_SYMBOL (sym_read_pipe, "read pipe");
 221 SCM_SYMBOL (sym_write_pipe, "write pipe");
 222
 223 SCM_DEFINE (scm_pipe, "pipe", 0, 0, 0,
 224             (),
 225             "Return a newly created pipe: a pair of ports which are linked\n"
 226             "together on the local machine.  The @emph{car} is the input\n"
 227             "port and the @emph{cdr} is the output port.  Data written (and\n"
 228             "flushed) to the output port can be read from the input port.\n"
 229             "Pipes are commonly used for communication with a newly forked\n"
 230             "child process.  The need to flush the output port can be\n"
 231             "avoided by making it unbuffered using @code{setvbuf}.\n"
 232             "\n"
 233             "Writes occur atomically provided the size of the data in bytes\n"
 234             "is not greater than the value of @code{PIPE_BUF}.  Note that\n"
 235             "the output port is likely to block if too much data (typically\n"
 236             "equal to @code{PIPE_BUF}) has been written but not yet read\n"
 237             "from the input port.")
 238 #define FUNC_NAME s_scm_pipe
 239 {
 240   int fd[2], rv;
 241   SCM p_rd, p_wt;
 242
 243   rv = pipe (fd);
 244   if (rv)
 245     SCM_SYSERROR;
 246
 247   p_rd = scm_fdes_to_port (fd[0], "r", sym_read_pipe);
 248   p_wt = scm_fdes_to_port (fd[1], "w", sym_write_pipe);
 249   return scm_cons (p_rd, p_wt);
 250 }
 251 #undef FUNC_NAME
 252
 253
 254 #ifdef HAVE_GETGROUPS
 255 SCM_DEFINE (scm_getgroups, "getgroups", 0, 0, 0,
 256             (),
 257             "Return a vector of integers representing the current\n"
 258             "supplementary group IDs.")
 259 #define FUNC_NAME s_scm_getgroups
 260 {
 261   SCM result;
 262   int ngroups;
 263   size_t size;
 264   GETGROUPS_T *groups;
 265
 266   ngroups = getgroups (0, NULL);
 267   if (ngroups <= 0)
 268     SCM_SYSERROR;
 269
 270   size = ngroups * sizeof (GETGROUPS_T);
 271   groups = scm_malloc (size);
 272   ngroups = getgroups (ngroups, groups);
 273
 274   result = scm_c_make_vector (ngroups, SCM_BOOL_F);
 275   while (--ngroups >= 0)
 276     SCM_SIMPLE_VECTOR_SET (result, ngroups, scm_from_ulong (groups[ngroups]));
 277
 278   free (groups);
 279   return result;
 280 }
 281 #undef FUNC_NAME
 282 #endif
 283
 284 #ifdef HAVE_SETGROUPS
 285 SCM_DEFINE (scm_setgroups, "setgroups", 1, 0, 0,
 286             (SCM group_vec),
 287             "Set the current set of supplementary group IDs to the integers\n"
 288             "in the given vector @var{vec}.  The return value is\n"
 289             "unspecified.\n"
 290             "\n"
 291             "Generally only the superuser can set the process group IDs.")
 292 #define FUNC_NAME s_scm_setgroups
 293 {
 294   size_t ngroups;
 295   size_t size;
 296   size_t i;
 297   int result;
 298   int save_errno;
 299   GETGROUPS_T *groups;
 300
 301   SCM_VALIDATE_VECTOR (SCM_ARG1, group_vec);
 302
 303   ngroups = SCM_SIMPLE_VECTOR_LENGTH (group_vec);
 304
 305   /* validate before allocating, so we don't have to worry about leaks */
 306   for (i = 0; i < ngroups; i++)
 307     {
 308       unsigned long ulong_gid;
 309       GETGROUPS_T gid;
 310       SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec, i),
 311                                ulong_gid);
 312       gid = ulong_gid;
 313       if (gid != ulong_gid)
 314         SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec, i));
 315     }
 316
 317   size = ngroups * sizeof (GETGROUPS_T);
 318   if (size / sizeof (GETGROUPS_T) != ngroups)
 319     SCM_OUT_OF_RANGE (SCM_ARG1, scm_from_int (ngroups));
 320   groups = scm_malloc (size);
 321   for(i = 0; i < ngroups; i++)
 322     groups [i] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec, i));
 323
 324   result = setgroups (ngroups, groups);
 325   save_errno = errno; /* don't let free() touch errno */
 326   free (groups);
 327   errno = save_errno;
 328   if (result < 0)
 329     SCM_SYSERROR;
 330   return SCM_UNSPECIFIED;
 331 }
 332 #undef FUNC_NAME
 333 #endif
 334
 335 #ifdef HAVE_GETPWENT
 336 SCM_DEFINE (scm_getpwuid, "getpw", 0, 1, 0,
 337             (SCM user),
 338             "Look up an entry in the user database.  @var{obj} can be an integer,\n"
 339             "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
 340             "or getpwent respectively.")
 341 #define FUNC_NAME s_scm_getpwuid
 342 {
 343   struct passwd *entry;
 344
 345   SCM result = scm_c_make_vector (7, SCM_UNSPECIFIED);
 346   if (SCM_UNBNDP (user) || scm_is_false (user))
 347     {
 348       SCM_SYSCALL (entry = getpwent ());
 349       if (! entry)
 350         {
 351           return SCM_BOOL_F;
 352         }
 353     }
 354   else if (scm_is_integer (user))
 355     {
 356       entry = getpwuid (scm_to_int (user));
 357     }
 358   else
 359     {
 360       WITH_STRING (user, c_user,
 361                    entry = getpwnam (c_user));
 362     }
 363   if (!entry)
 364     SCM_MISC_ERROR ("entry not found", SCM_EOL);
 365
 366   SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->pw_name));
 367   SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (entry->pw_passwd));
 368   SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ulong (entry->pw_uid));
 369   SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_ulong (entry->pw_gid));
 370   SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_locale_string (entry->pw_gecos));
 371   if (!entry->pw_dir)
 372     SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (""));
 373   else
 374     SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (entry->pw_dir));
 375   if (!entry->pw_shell)
 376     SCM_SIMPLE_VECTOR_SET(result, 6, scm_from_locale_string (""));
 377   else
 378     SCM_SIMPLE_VECTOR_SET(result, 6, scm_from_locale_string (entry->pw_shell));
 379   return result;
 380 }
 381 #undef FUNC_NAME
 382 #endif /* HAVE_GETPWENT */
 383
 384
 385 #ifdef HAVE_SETPWENT
 386 SCM_DEFINE (scm_setpwent, "setpw", 0, 1, 0,
 387             (SCM arg),
 388             "If called with a true argument, initialize or reset the password data\n"
 389             "stream.  Otherwise, close the stream.  The @code{setpwent} and\n"
 390             "@code{endpwent} procedures are implemented on top of this.")
 391 #define FUNC_NAME s_scm_setpwent
 392 {
 393   if (SCM_UNBNDP (arg) || scm_is_false (arg))
 394     endpwent ();
 395   else
 396     setpwent ();
 397   return SCM_UNSPECIFIED;
 398 }
 399 #undef FUNC_NAME
 400 #endif
 401
 402
 403 #ifdef HAVE_GETGRENT
 404 /* Combines getgrgid and getgrnam.  */
 405 SCM_DEFINE (scm_getgrgid, "getgr", 0, 1, 0,
 406             (SCM name),
 407             "Look up an entry in the group database.  @var{obj} can be an integer,\n"
 408             "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
 409             "or getgrent respectively.")
 410 #define FUNC_NAME s_scm_getgrgid
 411 {
 412   struct group *entry;
 413   SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED);
 414
 415   if (SCM_UNBNDP (name) || scm_is_false (name))
 416     {
 417       SCM_SYSCALL (entry = getgrent ());
 418       if (! entry)
 419         {
 420           return SCM_BOOL_F;
 421         }
 422     }
 423   else if (scm_is_integer (name))
 424     SCM_SYSCALL (entry = getgrgid (scm_to_int (name)));
 425   else
 426     STRING_SYSCALL (name, c_name,
 427                     entry = getgrnam (c_name));
 428   if (!entry)
 429     SCM_SYSERROR;
 430
 431   SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->gr_name));
 432   SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (entry->gr_passwd));
 433   SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ulong  (entry->gr_gid));
 434   SCM_SIMPLE_VECTOR_SET(result, 3, scm_makfromstrs (-1, entry->gr_mem));
 435   return result;
 436 }
 437 #undef FUNC_NAME
 438
 439
 440
 441 SCM_DEFINE (scm_setgrent, "setgr", 0, 1, 0,
 442             (SCM arg),
 443             "If called with a true argument, initialize or reset the group data\n"
 444             "stream.  Otherwise, close the stream.  The @code{setgrent} and\n"
 445             "@code{endgrent} procedures are implemented on top of this.")
 446 #define FUNC_NAME s_scm_setgrent
 447 {
 448   if (SCM_UNBNDP (arg) || scm_is_false (arg))
 449     endgrent ();
 450   else
 451     setgrent ();
 452   return SCM_UNSPECIFIED;
 453 }
 454 #undef FUNC_NAME
 455 #endif /* HAVE_GETGRENT */
 456
 457
 458 #ifdef HAVE_GETRLIMIT
 459 #ifdef RLIMIT_AS
 460 SCM_SYMBOL (sym_as, "as");
 461 #endif
 462 #ifdef RLIMIT_CORE
 463 SCM_SYMBOL (sym_core, "core");
 464 #endif
 465 #ifdef RLIMIT_CPU
 466 SCM_SYMBOL (sym_cpu, "cpu");
 467 #endif
 468 #ifdef RLIMIT_DATA
 469 SCM_SYMBOL (sym_data, "data");
 470 #endif
 471 #ifdef RLIMIT_FSIZE
 472 SCM_SYMBOL (sym_fsize, "fsize");
 473 #endif
 474 #ifdef RLIMIT_MEMLOCK
 475 SCM_SYMBOL (sym_memlock, "memlock");
 476 #endif
 477 #ifdef RLIMIT_MSGQUEUE
 478 SCM_SYMBOL (sym_msgqueue, "msgqueue");
 479 #endif
 480 #ifdef RLIMIT_NICE
 481 SCM_SYMBOL (sym_nice, "nice");
 482 #endif
 483 #ifdef RLIMIT_NOFILE
 484 SCM_SYMBOL (sym_nofile, "nofile");
 485 #endif
 486 #ifdef RLIMIT_NPROC
 487 SCM_SYMBOL (sym_nproc, "nproc");
 488 #endif
 489 #ifdef RLIMIT_RSS
 490 SCM_SYMBOL (sym_rss, "rss");
 491 #endif
 492 #ifdef RLIMIT_RTPRIO
 493 SCM_SYMBOL (sym_rtprio, "rtprio");
 494 #endif
 495 #ifdef RLIMIT_RTPRIO
 496 SCM_SYMBOL (sym_rttime, "rttime");
 497 #endif
 498 #ifdef RLIMIT_SIGPENDING
 499 SCM_SYMBOL (sym_sigpending, "sigpending");
 500 #endif
 501 #ifdef RLIMIT_STACK
 502 SCM_SYMBOL (sym_stack, "stack");
 503 #endif
 504
 505 static int
 506 scm_to_resource (SCM s, const char *func, int pos)
 507 {
 508   if (scm_is_number (s))
 509     return scm_to_int (s);
 510
 511   SCM_ASSERT_TYPE (scm_is_symbol (s), s, pos, func, "symbol");
 512
 513 #ifdef RLIMIT_AS
 514   if (scm_is_eq (s, sym_as))
 515     return RLIMIT_AS;
 516 #endif
 517 #ifdef RLIMIT_CORE
 518   if (scm_is_eq (s, sym_core))
 519     return RLIMIT_CORE;
 520 #endif
 521 #ifdef RLIMIT_CPU
 522   if (scm_is_eq (s, sym_cpu))
 523     return RLIMIT_CPU;
 524 #endif
 525 #ifdef RLIMIT_DATA
 526   if (scm_is_eq (s, sym_data))
 527     return RLIMIT_DATA;
 528 #endif
 529 #ifdef RLIMIT_FSIZE
 530   if (scm_is_eq (s, sym_fsize))
 531     return RLIMIT_FSIZE;
 532 #endif
 533 #ifdef RLIMIT_MEMLOCK
 534   if (scm_is_eq (s, sym_memlock))
 535     return RLIMIT_MEMLOCK;
 536 #endif
 537 #ifdef RLIMIT_MSGQUEUE
 538   if (scm_is_eq (s, sym_msgqueue))
 539     return RLIMIT_MSGQUEUE;
 540 #endif
 541 #ifdef RLIMIT_NICE
 542   if (scm_is_eq (s, sym_nice))
 543     return RLIMIT_NICE;
 544 #endif
 545 #ifdef RLIMIT_NOFILE
 546   if (scm_is_eq (s, sym_nofile))
 547     return RLIMIT_NOFILE;
 548 #endif
 549 #ifdef RLIMIT_NPROC
 550   if (scm_is_eq (s, sym_nproc))
 551     return RLIMIT_NPROC;
 552 #endif
 553 #ifdef RLIMIT_RSS
 554   if (scm_is_eq (s, sym_rss))
 555     return RLIMIT_RSS;
 556 #endif
 557 #ifdef RLIMIT_RTPRIO
 558   if (scm_is_eq (s, sym_rtprio))
 559     return RLIMIT_RTPRIO;
 560 #endif
 561 #ifdef RLIMIT_RTPRIO
 562   if (scm_is_eq (s, sym_rttime))
 563     return RLIMIT_RTPRIO;
 564 #endif
 565 #ifdef RLIMIT_SIGPENDING
 566   if (scm_is_eq (s, sym_sigpending))
 567     return RLIMIT_SIGPENDING;
 568 #endif
 569 #ifdef RLIMIT_STACK
 570   if (scm_is_eq (s, sym_stack))
 571     return RLIMIT_STACK;
 572 #endif
 573
 574   scm_misc_error (func, "invalid rlimit resource ~A", scm_list_1 (s));
 575   return 0;
 576 }
 577
 578 SCM_DEFINE (scm_getrlimit, "getrlimit", 1, 0, 0,
 579             (SCM resource),
 580             "Get a resource limit for this process. @var{resource} identifies the resource,\n"
 581             "either as an integer or as a symbol. For example, @code{(getrlimit 'stack)}\n"
 582             "gets the limits associated with @code{RLIMIT_STACK}.\n\n"
 583             "@code{getrlimit} returns two values, the soft and the hard limit. If no\n"
 584             "limit is set for the resource in question, the returned limit will be @code{#f}.")
 585 #define FUNC_NAME s_scm_getrlimit
 586 {
 587   int iresource;
 588   struct rlimit lim = { 0, 0 };
 589
 590   iresource = scm_to_resource (resource, FUNC_NAME, 1);
 591
 592   if (getrlimit (iresource, &lim) != 0)
 593     scm_syserror (FUNC_NAME);
 594
 595   return scm_values (scm_list_2 ((lim.rlim_cur == RLIM_INFINITY) ? SCM_BOOL_F
 596                                  : scm_from_long (lim.rlim_cur),
 597                                  (lim.rlim_max == RLIM_INFINITY) ? SCM_BOOL_F
 598                                  : scm_from_long (lim.rlim_max)));
 599 }
 600 #undef FUNC_NAME
 601
 602
 603 #ifdef HAVE_SETRLIMIT
 604 SCM_DEFINE (scm_setrlimit, "setrlimit", 3, 0, 0,
 605             (SCM resource, SCM soft, SCM hard),
 606             "Set a resource limit for this process. @var{resource} identifies the resource,\n"
 607             "either as an integer or as a symbol. @var{soft} and @var{hard} should be integers,\n"
 608             "or @code{#f} to indicate no limit (i.e., @code{RLIM_INFINITY}).\n\n"
 609             "For example, @code{(setrlimit 'stack 150000 300000)} sets the @code{RLIMIT_STACK}\n"
 610             "limit to 150 kilobytes, with a hard limit of 300 kB.")
 611 #define FUNC_NAME s_scm_setrlimit
 612 {
 613   int iresource;
 614   struct rlimit lim = { 0, 0 };
 615
 616   iresource = scm_to_resource (resource, FUNC_NAME, 1);
 617
 618   lim.rlim_cur = scm_is_false (soft) ? RLIM_INFINITY : scm_to_long (soft);
 619   lim.rlim_max = scm_is_false (hard) ? RLIM_INFINITY : scm_to_long (hard);
 620
 621   if (setrlimit (iresource, &lim) != 0)
 622     scm_syserror (FUNC_NAME);
 623
 624   return SCM_UNSPECIFIED;
 625 }
 626 #undef FUNC_NAME
 627 #endif /* HAVE_SETRLIMIT */
 628 #endif /* HAVE_GETRLIMIT */
 629
 630
 631 SCM_DEFINE (scm_kill, "kill", 2, 0, 0,
 632             (SCM pid, SCM sig),
 633             "Sends a signal to the specified process or group of processes.\n\n"
 634             "@var{pid} specifies the processes to which the signal is sent:\n\n"
 635             "@table @r\n"
 636             "@item @var{pid} greater than 0\n"
 637             "The process whose identifier is @var{pid}.\n"
 638             "@item @var{pid} equal to 0\n"
 639             "All processes in the current process group.\n"
 640             "@item @var{pid} less than -1\n"
 641             "The process group whose identifier is -@var{pid}\n"
 642             "@item @var{pid} equal to -1\n"
 643             "If the process is privileged, all processes except for some special\n"
 644             "system processes.  Otherwise, all processes with the current effective\n"
 645             "user ID.\n"
 646             "@end table\n\n"
 647             "@var{sig} should be specified using a variable corresponding to\n"
 648             "the Unix symbolic name, e.g.,\n\n"
 649             "@defvar SIGHUP\n"
 650             "Hang-up signal.\n"
 651             "@end defvar\n\n"
 652             "@defvar SIGINT\n"
 653             "Interrupt signal.\n"
 654             "@end defvar")
 655 #define FUNC_NAME s_scm_kill
 656 {
 657   /* Signal values are interned in scm_init_posix().  */
 658 #ifdef HAVE_KILL
 659   if (kill (scm_to_int (pid), scm_to_int  (sig)) != 0)
 660     SCM_SYSERROR;
 661 #else
 662   /* Mingw has raise(), but not kill().  (Other raw DOS environments might
 663      be similar.)  Use raise() when the requested pid is our own process,
 664      otherwise bomb.  */
 665   if (scm_to_int (pid) == getpid ())
 666     {
 667       if (raise (scm_to_int (sig)) != 0)
 668         {
 669         err:
 670           SCM_SYSERROR;
 671         }
 672       else
 673         {
 674           errno = ENOSYS;
 675           goto err;
 676         }
 677     }
 678 #endif
 679   return SCM_UNSPECIFIED;
 680 }
 681 #undef FUNC_NAME
 682
 683 #ifdef HAVE_WAITPID
 684 SCM_DEFINE (scm_waitpid, "waitpid", 1, 1, 0,
 685             (SCM pid, SCM options),
 686             "This procedure collects status information from a child process which\n"
 687             "has terminated or (optionally) stopped.  Normally it will\n"
 688             "suspend the calling process until this can be done.  If more than one\n"
 689             "child process is eligible then one will be chosen by the operating system.\n\n"
 690             "The value of @var{pid} determines the behaviour:\n\n"
 691             "@table @r\n"
 692             "@item @var{pid} greater than 0\n"
 693             "Request status information from the specified child process.\n"
 694             "@item @var{pid} equal to -1 or WAIT_ANY\n"
 695             "Request status information for any child process.\n"
 696             "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
 697             "Request status information for any child process in the current process\n"
 698             "group.\n"
 699             "@item @var{pid} less than -1\n"
 700             "Request status information for any child process whose process group ID\n"
 701             "is -@var{PID}.\n"
 702             "@end table\n\n"
 703             "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
 704             "values of zero or more of the following variables:\n\n"
 705             "@defvar WNOHANG\n"
 706             "Return immediately even if there are no child processes to be collected.\n"
 707             "@end defvar\n\n"
 708             "@defvar WUNTRACED\n"
 709             "Report status information for stopped processes as well as terminated\n"
 710             "processes.\n"
 711             "@end defvar\n\n"
 712             "The return value is a pair containing:\n\n"
 713             "@enumerate\n"
 714             "@item\n"
 715             "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
 716             "specified and no process was collected.\n"
 717             "@item\n"
 718             "The integer status value.\n"
 719             "@end enumerate")
 720 #define FUNC_NAME s_scm_waitpid
 721 {
 722   int i;
 723   int status;
 724   int ioptions;
 725   if (SCM_UNBNDP (options))
 726     ioptions = 0;
 727   else
 728     {
 729       /* Flags are interned in scm_init_posix.  */
 730       ioptions = scm_to_int (options);
 731     }
 732   SCM_SYSCALL (i = waitpid (scm_to_int (pid), &status, ioptions));
 733   if (i == -1)
 734     SCM_SYSERROR;
 735   return scm_cons (scm_from_int (i), scm_from_int (status));
 736 }
 737 #undef FUNC_NAME
 738 #endif /* HAVE_WAITPID */
 739
 740 #ifndef __MINGW32__
 741 SCM_DEFINE (scm_status_exit_val, "status:exit-val", 1, 0, 0,
 742             (SCM status),
 743             "Return the exit status value, as would be set if a process\n"
 744             "ended normally through a call to @code{exit} or @code{_exit},\n"
 745             "if any, otherwise @code{#f}.")
 746 #define FUNC_NAME s_scm_status_exit_val
 747 {
 748   int lstatus;
 749
 750   /* On Ultrix, the WIF... macros assume their argument is an lvalue;
 751      go figure.  */
 752   lstatus = scm_to_int (status);
 753   if (WIFEXITED (lstatus))
 754     return (scm_from_int (WEXITSTATUS (lstatus)));
 755   else
 756     return SCM_BOOL_F;
 757 }
 758 #undef FUNC_NAME
 759
 760 SCM_DEFINE (scm_status_term_sig, "status:term-sig", 1, 0, 0,
 761             (SCM status),
 762             "Return the signal number which terminated the process, if any,\n"
 763             "otherwise @code{#f}.")
 764 #define FUNC_NAME s_scm_status_term_sig
 765 {
 766   int lstatus;
 767
 768   lstatus = scm_to_int (status);
 769   if (WIFSIGNALED (lstatus))
 770     return scm_from_int (WTERMSIG (lstatus));
 771   else
 772     return SCM_BOOL_F;
 773 }
 774 #undef FUNC_NAME
 775
 776 SCM_DEFINE (scm_status_stop_sig, "status:stop-sig", 1, 0, 0,
 777             (SCM status),
 778             "Return the signal number which stopped the process, if any,\n"
 779             "otherwise @code{#f}.")
 780 #define FUNC_NAME s_scm_status_stop_sig
 781 {
 782   int lstatus;
 783
 784   lstatus = scm_to_int (status);
 785   if (WIFSTOPPED (lstatus))
 786     return scm_from_int (WSTOPSIG (lstatus));
 787   else
 788     return SCM_BOOL_F;
 789 }
 790 #undef FUNC_NAME
 791 #endif /* __MINGW32__ */
 792
 793 #ifdef HAVE_GETPPID
 794 SCM_DEFINE (scm_getppid, "getppid", 0, 0, 0,
 795             (),
 796             "Return an integer representing the process ID of the parent\n"
 797             "process.")
 798 #define FUNC_NAME s_scm_getppid
 799 {
 800   return scm_from_int (getppid ());
 801 }
 802 #undef FUNC_NAME
 803 #endif /* HAVE_GETPPID */
 804
 805
 806 #ifndef __MINGW32__
 807 SCM_DEFINE (scm_getuid, "getuid", 0, 0, 0,
 808             (),
 809             "Return an integer representing the current real user ID.")
 810 #define FUNC_NAME s_scm_getuid
 811 {
 812   return scm_from_int (getuid ());
 813 }
 814 #undef FUNC_NAME
 815
 816
 817
 818 SCM_DEFINE (scm_getgid, "getgid", 0, 0, 0,
 819             (),
 820             "Return an integer representing the current real group ID.")
 821 #define FUNC_NAME s_scm_getgid
 822 {
 823   return scm_from_int (getgid ());
 824 }
 825 #undef FUNC_NAME
 826
 827
 828
 829 SCM_DEFINE (scm_geteuid, "geteuid", 0, 0, 0,
 830             (),
 831             "Return an integer representing the current effective user ID.\n"
 832             "If the system does not support effective IDs, then the real ID\n"
 833             "is returned.  @code{(provided? 'EIDs)} reports whether the\n"
 834             "system supports effective IDs.")
 835 #define FUNC_NAME s_scm_geteuid
 836 {
 837 #ifdef HAVE_GETEUID
 838   return scm_from_int (geteuid ());
 839 #else
 840   return scm_from_int (getuid ());
 841 #endif
 842 }
 843 #undef FUNC_NAME
 844
 845
 846 SCM_DEFINE (scm_getegid, "getegid", 0, 0, 0,
 847             (),
 848             "Return an integer representing the current effective group ID.\n"
 849             "If the system does not support effective IDs, then the real ID\n"
 850             "is returned.  @code{(provided? 'EIDs)} reports whether the\n"
 851             "system supports effective IDs.")
 852 #define FUNC_NAME s_scm_getegid
 853 {
 854 #ifdef HAVE_GETEUID
 855   return scm_from_int (getegid ());
 856 #else
 857   return scm_from_int (getgid ());
 858 #endif
 859 }
 860 #undef FUNC_NAME
 861
 862
 863 SCM_DEFINE (scm_setuid, "setuid", 1, 0, 0,
 864             (SCM id),
 865             "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
 866             "the process has appropriate privileges.\n"
 867             "The return value is unspecified.")
 868 #define FUNC_NAME s_scm_setuid
 869 {
 870   if (setuid (scm_to_int (id)) != 0)
 871     SCM_SYSERROR;
 872   return SCM_UNSPECIFIED;
 873 }
 874 #undef FUNC_NAME
 875
 876 SCM_DEFINE (scm_setgid, "setgid", 1, 0, 0,
 877             (SCM id),
 878             "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
 879             "the process has appropriate privileges.\n"
 880             "The return value is unspecified.")
 881 #define FUNC_NAME s_scm_setgid
 882 {
 883   if (setgid (scm_to_int (id)) != 0)
 884     SCM_SYSERROR;
 885   return SCM_UNSPECIFIED;
 886 }
 887 #undef FUNC_NAME
 888
 889 SCM_DEFINE (scm_seteuid, "seteuid", 1, 0, 0,
 890             (SCM id),
 891             "Sets the effective user ID to the integer @var{id}, provided the process\n"
 892             "has appropriate privileges.  If effective IDs are not supported, the\n"
 893             "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
 894             "system supports effective IDs.\n"
 895             "The return value is unspecified.")
 896 #define FUNC_NAME s_scm_seteuid
 897 {
 898   int rv;
 899
 900 #ifdef HAVE_SETEUID
 901   rv = seteuid (scm_to_int (id));
 902 #else
 903   rv = setuid (scm_to_int (id));
 904 #endif
 905   if (rv != 0)
 906     SCM_SYSERROR;
 907   return SCM_UNSPECIFIED;
 908 }
 909 #undef FUNC_NAME
 910 #endif /* __MINGW32__ */
 911
 912
 913 #ifdef HAVE_SETEGID
 914 SCM_DEFINE (scm_setegid, "setegid", 1, 0, 0,
 915             (SCM id),
 916             "Sets the effective group ID to the integer @var{id}, provided the process\n"
 917             "has appropriate privileges.  If effective IDs are not supported, the\n"
 918             "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
 919             "system supports effective IDs.\n"
 920             "The return value is unspecified.")
 921 #define FUNC_NAME s_scm_setegid
 922 {
 923   int rv;
 924
 925 #ifdef HAVE_SETEUID
 926   rv = setegid (scm_to_int (id));
 927 #else
 928   rv = setgid (scm_to_int (id));
 929 #endif
 930   if (rv != 0)
 931     SCM_SYSERROR;
 932   return SCM_UNSPECIFIED;
 933
 934 }
 935 #undef FUNC_NAME
 936 #endif
 937
 938
 939 #ifdef HAVE_GETPGRP
 940 SCM_DEFINE (scm_getpgrp, "getpgrp", 0, 0, 0,
 941             (),
 942             "Return an integer representing the current process group ID.\n"
 943             "This is the POSIX definition, not BSD.")
 944 #define FUNC_NAME s_scm_getpgrp
 945 {
 946   int (*fn)();
 947   fn = (int (*) ()) getpgrp;
 948   return scm_from_int (fn (0));
 949 }
 950 #undef FUNC_NAME
 951 #endif /* HAVE_GETPGRP */
 952
 953
 954 #ifdef HAVE_SETPGID
 955 SCM_DEFINE (scm_setpgid, "setpgid", 2, 0, 0,
 956             (SCM pid, SCM pgid),
 957             "Move the process @var{pid} into the process group @var{pgid}.  @var{pid} or\n"
 958             "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
 959             "current process.\n"
 960             "Fails on systems that do not support job control.\n"
 961             "The return value is unspecified.")
 962 #define FUNC_NAME s_scm_setpgid
 963 {
 964   /* FIXME(?): may be known as setpgrp.  */
 965   if (setpgid (scm_to_int (pid), scm_to_int (pgid)) != 0)
 966     SCM_SYSERROR;
 967   return SCM_UNSPECIFIED;
 968 }
 969 #undef FUNC_NAME
 970 #endif /* HAVE_SETPGID */
 971
 972 #ifdef HAVE_SETSID
 973 SCM_DEFINE (scm_setsid, "setsid", 0, 0, 0,
 974             (),
 975             "Creates a new session.  The current process becomes the session leader\n"
 976             "and is put in a new process group.  The process will be detached\n"
 977             "from its controlling terminal if it has one.\n"
 978             "The return value is an integer representing the new process group ID.")
 979 #define FUNC_NAME s_scm_setsid
 980 {
 981   pid_t sid = setsid ();
 982   if (sid == -1)
 983     SCM_SYSERROR;
 984   return SCM_UNSPECIFIED;
 985 }
 986 #undef FUNC_NAME
 987 #endif /* HAVE_SETSID */
 988
 989 #ifdef HAVE_GETSID
 990 SCM_DEFINE (scm_getsid, "getsid", 1, 0, 0,
 991             (SCM pid),
 992             "Returns the session ID of process @var{pid}.  (The session\n"
 993             "ID of a process is the process group ID of its session leader.)")
 994 #define FUNC_NAME s_scm_getsid
 995 {
 996   return scm_from_int (getsid (scm_to_int (pid)));
 997 }
 998 #undef FUNC_NAME
 999 #endif /* HAVE_GETSID */
1000
1001
1002 /* ttyname returns its result in a single static buffer, hence
1003    scm_i_misc_mutex for thread safety.  In glibc 2.3.2 two threads
1004    continuously calling ttyname will otherwise get an overwrite quite
1005    easily.
1006
1007    ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
1008    there's probably little to be gained in either speed or parallelism.  */
1009
1010 #ifdef HAVE_TTYNAME
1011 SCM_DEFINE (scm_ttyname, "ttyname", 1, 0, 0,
1012             (SCM port),
1013             "Return a string with the name of the serial terminal device\n"
1014             "underlying @var{port}.")
1015 #define FUNC_NAME s_scm_ttyname
1016 {
1017   char *result;
1018   int fd, err;
1019   SCM ret = SCM_BOOL_F;
1020
1021   port = SCM_COERCE_OUTPORT (port);
1022   SCM_VALIDATE_OPPORT (1, port);
1023   if (!SCM_FPORTP (port))
1024     return SCM_BOOL_F;
1025   fd = SCM_FPORT_FDES (port);
1026
1027   scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex);
1028
1029   SCM_SYSCALL (result = ttyname (fd));
1030   err = errno;
1031   if (result != NULL)
1032     result = strdup (result);
1033
1034   scm_i_pthread_mutex_unlock (&scm_i_misc_mutex);
1035
1036   if (!result)
1037     {
1038       errno = err;
1039       SCM_SYSERROR;
1040     }
1041   else
1042     ret = scm_take_locale_string (result);
1043
1044   return ret;
1045 }
1046 #undef FUNC_NAME
1047 #endif /* HAVE_TTYNAME */
1048
1049
1050 /* For thread safety "buf" is used instead of NULL for the ctermid static
1051    buffer.  Actually it's unlikely the controlling terminal will change
1052    during program execution, and indeed on glibc (2.3.2) it's always just
1053    "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
1054    safety everywhere.  */
1055 #ifdef HAVE_CTERMID
1056 SCM_DEFINE (scm_ctermid, "ctermid", 0, 0, 0,
1057             (),
1058             "Return a string containing the file name of the controlling\n"
1059             "terminal for the current process.")
1060 #define FUNC_NAME s_scm_ctermid
1061 {
1062   char buf[L_ctermid];
1063   char *result = ctermid (buf);
1064   if (*result == '\0')
1065     SCM_SYSERROR;
1066   return scm_from_locale_string (result);
1067 }
1068 #undef FUNC_NAME
1069 #endif /* HAVE_CTERMID */
1070
1071 #ifdef HAVE_TCGETPGRP
1072 SCM_DEFINE (scm_tcgetpgrp, "tcgetpgrp", 1, 0, 0,
1073             (SCM port),
1074             "Return the process group ID of the foreground process group\n"
1075             "associated with the terminal open on the file descriptor\n"
1076             "underlying @var{port}.\n"
1077             "\n"
1078             "If there is no foreground process group, the return value is a\n"
1079             "number greater than 1 that does not match the process group ID\n"
1080             "of any existing process group.  This can happen if all of the\n"
1081             "processes in the job that was formerly the foreground job have\n"
1082             "terminated, and no other job has yet been moved into the\n"
1083             "foreground.")
1084 #define FUNC_NAME s_scm_tcgetpgrp
1085 {
1086   int fd;
1087   pid_t pgid;
1088
1089   port = SCM_COERCE_OUTPORT (port);
1090
1091   SCM_VALIDATE_OPFPORT (1, port);
1092   fd = SCM_FPORT_FDES (port);
1093   if ((pgid = tcgetpgrp (fd)) == -1)
1094     SCM_SYSERROR;
1095   return scm_from_int (pgid);
1096 }
1097 #undef FUNC_NAME
1098 #endif /* HAVE_TCGETPGRP */
1099
1100 #ifdef HAVE_TCSETPGRP
1101 SCM_DEFINE (scm_tcsetpgrp, "tcsetpgrp", 2, 0, 0,
1102             (SCM port, SCM pgid),
1103             "Set the foreground process group ID for the terminal used by the file\n"
1104             "descriptor underlying @var{port} to the integer @var{pgid}.\n"
1105             "The calling process\n"
1106             "must be a member of the same session as @var{pgid} and must have the same\n"
1107             "controlling terminal.  The return value is unspecified.")
1108 #define FUNC_NAME s_scm_tcsetpgrp
1109 {
1110   int fd;
1111
1112   port = SCM_COERCE_OUTPORT (port);
1113
1114   SCM_VALIDATE_OPFPORT (1, port);
1115   fd = SCM_FPORT_FDES (port);
1116   if (tcsetpgrp (fd, scm_to_int (pgid)) == -1)
1117     SCM_SYSERROR;
1118   return SCM_UNSPECIFIED;
1119 }
1120 #undef FUNC_NAME
1121 #endif /* HAVE_TCSETPGRP */
1122
1123 SCM_DEFINE (scm_execl, "execl", 1, 0, 1,
1124             (SCM filename, SCM args),
1125             "Executes the file named by @var{path} as a new process image.\n"
1126             "The remaining arguments are supplied to the process; from a C program\n"
1127             "they are accessible as the @code{argv} argument to @code{main}.\n"
1128             "Conventionally the first @var{arg} is the same as @var{path}.\n"
1129             "All arguments must be strings.\n\n"
1130             "If @var{arg} is missing, @var{path} is executed with a null\n"
1131             "argument list, which may have system-dependent side-effects.\n\n"
1132             "This procedure is currently implemented using the @code{execv} system\n"
1133             "call, but we call it @code{execl} because of its Scheme calling interface.")
1134 #define FUNC_NAME s_scm_execl
1135 {
1136   char *exec_file;
1137   char **exec_argv;
1138
1139   scm_dynwind_begin (0);
1140
1141   exec_file = scm_to_locale_string (filename);
1142   scm_dynwind_free (exec_file);
1143
1144   exec_argv = scm_i_allocate_string_pointers (args);
1145
1146   execv (exec_file,
1147 #ifdef __MINGW32__
1148          /* extra "const" in mingw formals, provokes warning from gcc */
1149          (const char * const *)
1150 #endif
1151          exec_argv);
1152   SCM_SYSERROR;
1153
1154   /* not reached.  */
1155   scm_dynwind_end ();
1156   return SCM_BOOL_F;
1157 }
1158 #undef FUNC_NAME
1159
1160 SCM_DEFINE (scm_execlp, "execlp", 1, 0, 1,
1161             (SCM filename, SCM args),
1162             "Similar to @code{execl}, however if\n"
1163             "@var{filename} does not contain a slash\n"
1164             "then the file to execute will be located by searching the\n"
1165             "directories listed in the @code{PATH} environment variable.\n\n"
1166             "This procedure is currently implemented using the @code{execvp} system\n"
1167             "call, but we call it @code{execlp} because of its Scheme calling interface.")
1168 #define FUNC_NAME s_scm_execlp
1169 {
1170   char *exec_file;
1171   char **exec_argv;
1172
1173   scm_dynwind_begin (0);
1174
1175   exec_file = scm_to_locale_string (filename);
1176   scm_dynwind_free (exec_file);
1177
1178   exec_argv = scm_i_allocate_string_pointers (args);
1179
1180   execvp (exec_file,
1181 #ifdef __MINGW32__
1182           /* extra "const" in mingw formals, provokes warning from gcc */
1183           (const char * const *)
1184 #endif
1185           exec_argv);
1186   SCM_SYSERROR;
1187
1188   /* not reached.  */
1189   scm_dynwind_end ();
1190   return SCM_BOOL_F;
1191 }
1192 #undef FUNC_NAME
1193
1194
1195 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1196    list strings the way environ_list_to_c gives.  */
1197
1198 SCM_DEFINE (scm_execle, "execle", 2, 0, 1,
1199             (SCM filename, SCM env, SCM args),
1200             "Similar to @code{execl}, but the environment of the new process is\n"
1201             "specified by @var{env}, which must be a list of strings as returned by the\n"
1202             "@code{environ} procedure.\n\n"
1203             "This procedure is currently implemented using the @code{execve} system\n"
1204             "call, but we call it @code{execle} because of its Scheme calling interface.")
1205 #define FUNC_NAME s_scm_execle
1206 {
1207   char **exec_argv;
1208   char **exec_env;
1209   char *exec_file;
1210
1211   scm_dynwind_begin (0);
1212
1213   exec_file = scm_to_locale_string (filename);
1214   scm_dynwind_free (exec_file);
1215
1216   exec_argv = scm_i_allocate_string_pointers (args);
1217   exec_env = scm_i_allocate_string_pointers (env);
1218
1219   execve (exec_file,
1220 #ifdef __MINGW32__
1221           /* extra "const" in mingw formals, provokes warning from gcc */
1222           (const char * const *)
1223 #endif
1224           exec_argv,
1225 #ifdef __MINGW32__
1226           /* extra "const" in mingw formals, provokes warning from gcc */
1227           (const char * const *)
1228 #endif
1229           exec_env);
1230   SCM_SYSERROR;
1231
1232   /* not reached.  */
1233   scm_dynwind_end ();
1234   return SCM_BOOL_F;
1235 }
1236 #undef FUNC_NAME
1237
1238 #ifdef HAVE_FORK
1239 SCM_DEFINE (scm_fork, "primitive-fork", 0, 0, 0,
1240             (),
1241             "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1242             "In the child the return value is 0.  In the parent the return value is\n"
1243             "the integer process ID of the child.\n\n"
1244             "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1245             "with the scsh fork.")
1246 #define FUNC_NAME s_scm_fork
1247 {
1248   int pid;
1249   pid = fork ();
1250   if (pid == -1)
1251     SCM_SYSERROR;
1252   return scm_from_int (pid);
1253 }
1254 #undef FUNC_NAME
1255 #endif /* HAVE_FORK */
1256
1257 #ifdef __MINGW32__
1258 # include "win32-uname.h"
1259 #endif
1260
1261 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1262 SCM_DEFINE (scm_uname, "uname", 0, 0, 0,
1263             (),
1264             "Return an object with some information about the computer\n"
1265             "system the program is running on.")
1266 #define FUNC_NAME s_scm_uname
1267 {
1268   struct utsname buf;
1269   SCM result = scm_c_make_vector (5, SCM_UNSPECIFIED);
1270   if (uname (&buf) < 0)
1271     SCM_SYSERROR;
1272   SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (buf.sysname));
1273   SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (buf.nodename));
1274   SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_locale_string (buf.release));
1275   SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_locale_string (buf.version));
1276   SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_locale_string (buf.machine));
1277 /*
1278    a linux special?
1279   SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1280 */
1281   return result;
1282 }
1283 #undef FUNC_NAME
1284 #endif /* HAVE_UNAME */
1285
1286 SCM_DEFINE (scm_environ, "environ", 0, 1, 0,
1287             (SCM env),
1288             "If @var{env} is omitted, return the current environment (in the\n"
1289             "Unix sense) as a list of strings.  Otherwise set the current\n"
1290             "environment, which is also the default environment for child\n"
1291             "processes, to the supplied list of strings.  Each member of\n"
1292             "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1293             "@code{NAME} should not be duplicated.  If @var{env} is supplied\n"
1294             "then the return value is unspecified.")
1295 #define FUNC_NAME s_scm_environ
1296 {
1297   if (SCM_UNBNDP (env))
1298     return scm_makfromstrs (-1, environ);
1299   else
1300     {
1301       environ = scm_i_allocate_string_pointers (env);
1302       return SCM_UNSPECIFIED;
1303     }
1304 }
1305 #undef FUNC_NAME
1306
1307 #ifdef L_tmpnam
1308
1309 SCM_DEFINE (scm_tmpnam, "tmpnam", 0, 0, 0,
1310             (),
1311             "Return a name in the file system that does not match any\n"
1312             "existing file.  However there is no guarantee that another\n"
1313             "process will not create the file after @code{tmpnam} is called.\n"
1314             "Care should be taken if opening the file, e.g., use the\n"
1315             "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1316 #define FUNC_NAME s_scm_tmpnam
1317 {
1318   char name[L_tmpnam];
1319   char *rv;
1320
1321   SCM_SYSCALL (rv = tmpnam (name));
1322   if (rv == NULL)
1323     /* not SCM_SYSERROR since errno probably not set.  */
1324     SCM_MISC_ERROR ("tmpnam failed", SCM_EOL);
1325   return scm_from_locale_string (name);
1326 }
1327 #undef FUNC_NAME
1328
1329 #endif
1330
1331 SCM_DEFINE (scm_tmpfile, "tmpfile", 0, 0, 0,
1332             (void),
1333             "Return an input/output port to a unique temporary file\n"
1334             "named using the path prefix @code{P_tmpdir} defined in\n"
1335             "@file{stdio.h}.\n"
1336             "The file is automatically deleted when the port is closed\n"
1337             "or the program terminates.")
1338 #define FUNC_NAME s_scm_tmpfile
1339 {
1340   FILE *rv;
1341   int fd;
1342
1343   if (! (rv = tmpfile ()))
1344     SCM_SYSERROR;
1345
1346 #ifndef __MINGW32__
1347   fd = dup (fileno (rv));
1348   fclose (rv);
1349 #else
1350   fd = fileno (rv);
1351   /* FIXME: leaking the file, it will never be closed! */
1352 #endif
1353
1354   return scm_fdes_to_port (fd, "w+", SCM_BOOL_F);
1355 }
1356 #undef FUNC_NAME
1357
1358 SCM_DEFINE (scm_utime, "utime", 1, 5, 0,
1359             (SCM pathname, SCM actime, SCM modtime, SCM actimens, SCM modtimens,
1360              SCM flags),
1361             "@code{utime} sets the access and modification times for the\n"
1362             "file named by @var{path}.  If @var{actime} or @var{modtime} is\n"
1363             "not supplied, then the current time is used.  @var{actime} and\n"
1364             "@var{modtime} must be integer time values as returned by the\n"
1365             "@code{current-time} procedure.\n\n"
1366             "The optional @var{actimens} and @var{modtimens} are nanoseconds\n"
1367             "to add @var{actime} and @var{modtime}. Nanosecond precision is\n"
1368             "only supported on some combinations of file systems and operating\n"
1369             "systems.\n"
1370             "@lisp\n"
1371             "(utime \"foo\" (- (current-time) 3600))\n"
1372             "@end lisp\n"
1373             "will set the access time to one hour in the past and the\n"
1374             "modification time to the current time.")
1375 #define FUNC_NAME s_scm_utime
1376 {
1377   int rv;
1378   time_t atim_sec, mtim_sec;
1379   long atim_nsec, mtim_nsec;
1380   int f;
1381
1382   if (SCM_UNBNDP (actime))
1383     {
1384 #ifdef HAVE_UTIMENSAT
1385       atim_sec = 0;
1386       atim_nsec = UTIME_NOW;
1387 #else
1388       SCM_SYSCALL (time (&atim_sec));
1389       atim_nsec = 0;
1390 #endif
1391     }
1392   else
1393     {
1394       atim_sec = SCM_NUM2ULONG (2, actime);
1395       if (SCM_UNBNDP (actimens))
1396         atim_nsec = 0;
1397       else
1398         atim_nsec = SCM_NUM2LONG (4, actimens);
1399     }
1400
1401   if (SCM_UNBNDP (modtime))
1402     {
1403 #ifdef HAVE_UTIMENSAT
1404       mtim_sec = 0;
1405       mtim_nsec = UTIME_NOW;
1406 #else
1407       SCM_SYSCALL (time (&mtim_sec));
1408       mtim_nsec = 0;
1409 #endif
1410     }
1411   else
1412     {
1413       mtim_sec = SCM_NUM2ULONG (3, modtime);
1414       if (SCM_UNBNDP (modtimens))
1415         mtim_nsec = 0;
1416       else
1417         mtim_nsec = SCM_NUM2LONG (5, modtimens);
1418     }
1419
1420   if (SCM_UNBNDP (flags))
1421     f = 0;
1422   else
1423     f = SCM_NUM2INT (6, flags);
1424
1425 #ifdef HAVE_UTIMENSAT
1426   {
1427     struct timespec times[2];
1428     times[0].tv_sec = atim_sec;
1429     times[0].tv_nsec = atim_nsec;
1430     times[1].tv_sec = mtim_sec;
1431     times[1].tv_nsec = mtim_nsec;
1432
1433     STRING_SYSCALL (pathname, c_pathname,
1434                     rv = utimensat (AT_FDCWD, c_pathname, times, f));
1435   }
1436 #else
1437   {
1438     struct utimbuf utm;
1439     utm.actime = atim_sec;
1440     utm.modtime = mtim_sec;
1441
1442     STRING_SYSCALL (pathname, c_pathname,
1443                     rv = utime (c_pathname, &utm));
1444   }
1445 #endif
1446
1447   if (rv != 0)
1448     SCM_SYSERROR;
1449   return SCM_UNSPECIFIED;
1450 }
1451 #undef FUNC_NAME
1452
1453 SCM_DEFINE (scm_getpid, "getpid", 0, 0, 0,
1454             (),
1455             "Return an integer representing the current process ID.")
1456 #define FUNC_NAME s_scm_getpid
1457 {
1458   return scm_from_ulong (getpid ());
1459 }
1460 #undef FUNC_NAME
1461
1462 SCM_DEFINE (scm_putenv, "putenv", 1, 0, 0,
1463             (SCM str),
1464             "Modifies the environment of the current process, which is\n"
1465             "also the default environment inherited by child processes.\n\n"
1466             "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1467             "directly into the environment, replacing any existing environment string\n"
1468             "with\n"
1469             "name matching @code{NAME}.  If @var{string} does not contain an equal\n"
1470             "sign, then any existing string with name matching @var{string} will\n"
1471             "be removed.\n\n"
1472             "The return value is unspecified.")
1473 #define FUNC_NAME s_scm_putenv
1474 {
1475   int rv;
1476   char *c_str = scm_to_locale_string (str);
1477
1478   /* Leave C_STR in the environment.  */
1479
1480   /* Gnulib's `putenv' module honors the semantics described above.  */
1481   rv = putenv (c_str);
1482   if (rv < 0)
1483     SCM_SYSERROR;
1484
1485   return SCM_UNSPECIFIED;
1486 }
1487 #undef FUNC_NAME
1488
1489 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1490    systems (i.e., systems where a reentrant locale API is not available).  It
1491    is also acquired before calls to `nl_langinfo ()'.  See `i18n.c' for
1492    details.  */
1493 scm_i_pthread_mutex_t scm_i_locale_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER;
1494
1495 #ifdef HAVE_SETLOCALE
1496
1497 SCM_DEFINE (scm_setlocale, "setlocale", 1, 1, 0,
1498             (SCM category, SCM locale),
1499             "If @var{locale} is omitted, return the current value of the\n"
1500             "specified locale category as a system-dependent string.\n"
1501             "@var{category} should be specified using the values\n"
1502             "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1503             "\n"
1504             "Otherwise the specified locale category is set to the string\n"
1505             "@var{locale} and the new value is returned as a\n"
1506             "system-dependent string.  If @var{locale} is an empty string,\n"
1507             "the locale will be set using environment variables.\n"
1508             "\n"
1509             "When the locale is changed, the character encoding of the new\n"
1510             "locale (UTF-8, ISO-8859-1, etc.) is used for the current\n"
1511             "input, output, and error ports\n")
1512 #define FUNC_NAME s_scm_setlocale
1513 {
1514   int c_category;
1515   char *clocale;
1516   char *rv;
1517   const char *enc;
1518
1519   scm_dynwind_begin (0);
1520
1521   if (SCM_UNBNDP (locale))
1522     {
1523       clocale = NULL;
1524     }
1525   else
1526     {
1527       clocale = scm_to_locale_string (locale);
1528       scm_dynwind_free (clocale);
1529     }
1530
1531   c_category = scm_i_to_lc_category (category, 1);
1532
1533   scm_i_pthread_mutex_lock (&scm_i_locale_mutex);
1534   rv = setlocale (c_category, clocale);
1535   scm_i_pthread_mutex_unlock (&scm_i_locale_mutex);
1536
1537   if (rv == NULL)
1538     {
1539       /* POSIX and C99 don't say anything about setlocale setting errno, so
1540          force a sensible value here.  glibc leaves ENOENT, which would be
1541          fine, but it's not a documented feature.  */
1542       errno = EINVAL;
1543       SCM_SYSERROR;
1544     }
1545
1546   enc = locale_charset ();
1547
1548   /* Set the default encoding for new ports.  */
1549   scm_i_set_default_port_encoding (enc);
1550
1551   /* Set the encoding for the stdio ports.  */
1552   scm_i_set_port_encoding_x (scm_current_input_port (), enc);
1553   scm_i_set_port_encoding_x (scm_current_output_port (), enc);
1554   scm_i_set_port_encoding_x (scm_current_error_port (), enc);
1555
1556   scm_dynwind_end ();
1557   return scm_from_locale_string (rv);
1558 }
1559 #undef FUNC_NAME
1560 #endif /* HAVE_SETLOCALE */
1561
1562 #ifdef HAVE_MKNOD
1563 SCM_DEFINE (scm_mknod, "mknod", 4, 0, 0,
1564             (SCM path, SCM type, SCM perms, SCM dev),
1565             "Creates a new special file, such as a file corresponding to a device.\n"
1566             "@var{path} specifies the name of the file.  @var{type} should\n"
1567             "be one of the following symbols:\n"
1568             "regular, directory, symlink, block-special, char-special,\n"
1569             "fifo, or socket.  @var{perms} (an integer) specifies the file permissions.\n"
1570             "@var{dev} (an integer) specifies which device the special file refers\n"
1571             "to.  Its exact interpretation depends on the kind of special file\n"
1572             "being created.\n\n"
1573             "E.g.,\n"
1574             "@lisp\n"
1575             "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1576             "@end lisp\n\n"
1577             "The return value is unspecified.")
1578 #define FUNC_NAME s_scm_mknod
1579 {
1580   int val;
1581   const char *p;
1582   int ctype = 0;
1583
1584   SCM_VALIDATE_STRING (1, path);
1585   SCM_VALIDATE_SYMBOL (2, type);
1586
1587   p = scm_i_symbol_chars (type);
1588   if (strcmp (p, "regular") == 0)
1589     ctype = S_IFREG;
1590   else if (strcmp (p, "directory") == 0)
1591     ctype = S_IFDIR;
1592 #ifdef S_IFLNK
1593   /* systems without symlinks probably don't have S_IFLNK defined */
1594   else if (strcmp (p, "symlink") == 0)
1595     ctype = S_IFLNK;
1596 #endif
1597   else if (strcmp (p, "block-special") == 0)
1598     ctype = S_IFBLK;
1599   else if (strcmp (p, "char-special") == 0)
1600     ctype = S_IFCHR;
1601   else if (strcmp (p, "fifo") == 0)
1602     ctype = S_IFIFO;
1603 #ifdef S_IFSOCK
1604   else if (strcmp (p, "socket") == 0)
1605     ctype = S_IFSOCK;
1606 #endif
1607   else
1608     SCM_OUT_OF_RANGE (2, type);
1609
1610   STRING_SYSCALL (path, c_path,
1611                   val = mknod (c_path,
1612                                ctype | scm_to_int (perms),
1613                                scm_to_int (dev)));
1614   if (val != 0)
1615     SCM_SYSERROR;
1616   return SCM_UNSPECIFIED;
1617 }
1618 #undef FUNC_NAME
1619 #endif /* HAVE_MKNOD */
1620
1621 #ifdef HAVE_NICE
1622 SCM_DEFINE (scm_nice, "nice", 1, 0, 0,
1623             (SCM incr),
1624             "Increment the priority of the current process by @var{incr}.  A higher\n"
1625             "priority value means that the process runs less often.\n"
1626             "The return value is unspecified.")
1627 #define FUNC_NAME s_scm_nice
1628 {
1629   /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1630      from "prio-NZERO", so an error must be detected from errno changed */
1631   errno = 0;
1632   nice (scm_to_int (incr));
1633   if (errno != 0)
1634     SCM_SYSERROR;
1635
1636   return SCM_UNSPECIFIED;
1637 }
1638 #undef FUNC_NAME
1639 #endif /* HAVE_NICE */
1640
1641 #ifdef HAVE_SYNC
1642 SCM_DEFINE (scm_sync, "sync", 0, 0, 0,
1643             (),
1644             "Flush the operating system disk buffers.\n"
1645             "The return value is unspecified.")
1646 #define FUNC_NAME s_scm_sync
1647 {
1648   sync();
1649   return SCM_UNSPECIFIED;
1650 }
1651 #undef FUNC_NAME
1652 #endif /* HAVE_SYNC */
1653
1654
1655 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1656    to avoid another thread overwriting it.  A test program running crypt
1657    continuously in two threads can be quickly seen tripping this problem.
1658    crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1659
1660    glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1661    slower (about 5x) than plain crypt if you pass an uninitialized data
1662    block each time.  Presumably there's some one-time setups.  The best way
1663    to use crypt_r for parallel execution in multiple threads would probably
1664    be to maintain a little pool of initialized crypt_data structures, take
1665    one and use it, then return it to the pool.  That pool could be garbage
1666    collected so it didn't add permanently to memory use if only a few crypt
1667    calls are made.  But we expect crypt will be used rarely, and even more
1668    rarely will there be any desire for lots of parallel execution on
1669    multiple cpus.  So for now we don't bother with anything fancy, just
1670    ensure it works.  */
1671
1672 #ifdef HAVE_CRYPT
1673 SCM_DEFINE (scm_crypt, "crypt", 2, 0, 0,
1674             (SCM key, SCM salt),
1675             "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1676             "crypt(3) library call.")
1677 #define FUNC_NAME s_scm_crypt
1678 {
1679   SCM ret;
1680   char *c_key, *c_salt, *c_ret;
1681
1682   scm_dynwind_begin (0);
1683   scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex);
1684
1685   c_key = scm_to_locale_string (key);
1686   scm_dynwind_free (c_key);
1687   c_salt = scm_to_locale_string (salt);
1688   scm_dynwind_free (c_salt);
1689
1690   /* The Linux crypt(3) man page says crypt will return NULL and set errno
1691      on error.  (Eg. ENOSYS if legal restrictions mean it cannot be
1692      implemented).  */
1693   c_ret = crypt (c_key, c_salt);
1694   if (c_ret == NULL)
1695     SCM_SYSERROR;
1696
1697   ret = scm_from_locale_string (c_ret);
1698   scm_dynwind_end ();
1699   return ret;
1700 }
1701 #undef FUNC_NAME
1702 #endif /* HAVE_CRYPT */
1703
1704 #if HAVE_CHROOT
1705 SCM_DEFINE (scm_chroot, "chroot", 1, 0, 0,
1706             (SCM path),
1707             "Change the root directory to that specified in @var{path}.\n"
1708             "This directory will be used for path names beginning with\n"
1709             "@file{/}.  The root directory is inherited by all children\n"
1710             "of the current process.  Only the superuser may change the\n"
1711             "root directory.")
1712 #define FUNC_NAME s_scm_chroot
1713 {
1714   int rv;
1715
1716   WITH_STRING (path, c_path,
1717                rv = chroot (c_path));
1718   if (rv == -1)
1719     SCM_SYSERROR;
1720   return SCM_UNSPECIFIED;
1721 }
1722 #undef FUNC_NAME
1723 #endif /* HAVE_CHROOT */
1724
1725
1726 #ifdef __MINGW32__
1727 /* Wrapper function to supplying `getlogin()' under Windows.  */
1728 static char * getlogin (void)
1729 {
1730   static char user[256];
1731   static unsigned long len = 256;
1732
1733   if (!GetUserName (user, &len))
1734     return NULL;
1735   return user;
1736 }
1737 #endif /* __MINGW32__ */
1738
1739
1740 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1741 SCM_DEFINE (scm_getlogin, "getlogin", 0, 0, 0,
1742             (void),
1743             "Return a string containing the name of the user logged in on\n"
1744             "the controlling terminal of the process, or @code{#f} if this\n"
1745             "information cannot be obtained.")
1746 #define FUNC_NAME s_scm_getlogin
1747 {
1748   char * p;
1749
1750   p = getlogin ();
1751   if (!p || !*p)
1752     return SCM_BOOL_F;
1753   return scm_from_locale_string (p);
1754 }
1755 #undef FUNC_NAME
1756 #endif /* HAVE_GETLOGIN */
1757
1758 #if HAVE_GETPRIORITY
1759 SCM_DEFINE (scm_getpriority, "getpriority", 2, 0, 0,
1760             (SCM which, SCM who),
1761             "Return the scheduling priority of the process, process group\n"
1762             "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1763             "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1764             "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1765             "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1766             "process group identifier for @code{PRIO_PGRP}, and a user\n"
1767             "identifier for @code{PRIO_USER}.  A zero value of @var{who}\n"
1768             "denotes the current process, process group, or user.  Return\n"
1769             "the highest priority (lowest numerical value) of any of the\n"
1770             "specified processes.")
1771 #define FUNC_NAME s_scm_getpriority
1772 {
1773   int cwhich, cwho, ret;
1774
1775   cwhich = scm_to_int (which);
1776   cwho = scm_to_int (who);
1777
1778   /* We have to clear errno and examine it later, because -1 is a
1779      legal return value for getpriority().  */
1780   errno = 0;
1781   ret = getpriority (cwhich, cwho);
1782   if (errno != 0)
1783     SCM_SYSERROR;
1784   return scm_from_int (ret);
1785 }
1786 #undef FUNC_NAME
1787 #endif /* HAVE_GETPRIORITY */
1788
1789 #if HAVE_SETPRIORITY
1790 SCM_DEFINE (scm_setpriority, "setpriority", 3, 0, 0,
1791             (SCM which, SCM who, SCM prio),
1792             "Set the scheduling priority of the process, process group\n"
1793             "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1794             "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1795             "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1796             "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1797             "process group identifier for @code{PRIO_PGRP}, and a user\n"
1798             "identifier for @code{PRIO_USER}.  A zero value of @var{who}\n"
1799             "denotes the current process, process group, or user.\n"
1800             "@var{prio} is a value in the range -20 and 20, the default\n"
1801             "priority is 0; lower priorities cause more favorable\n"
1802             "scheduling.  Sets the priority of all of the specified\n"
1803             "processes.  Only the super-user may lower priorities.\n"
1804             "The return value is not specified.")
1805 #define FUNC_NAME s_scm_setpriority
1806 {
1807   int cwhich, cwho, cprio;
1808
1809   cwhich = scm_to_int (which);
1810   cwho = scm_to_int (who);
1811   cprio = scm_to_int (prio);
1812
1813   if (setpriority (cwhich, cwho, cprio) == -1)
1814     SCM_SYSERROR;
1815   return SCM_UNSPECIFIED;
1816 }
1817 #undef FUNC_NAME
1818 #endif /* HAVE_SETPRIORITY */
1819
1820 #ifdef HAVE_SCHED_GETAFFINITY
1821
1822 static SCM
1823 cpu_set_to_bitvector (const cpu_set_t *cs)
1824 {
1825   SCM bv;
1826   size_t cpu;
1827
1828   bv = scm_c_make_bitvector (sizeof (*cs), SCM_BOOL_F);
1829
1830   for (cpu = 0; cpu < sizeof (*cs); cpu++)
1831     {
1832       if (CPU_ISSET (cpu, cs))
1833         /* XXX: This is inefficient but avoids code duplication.  */
1834         scm_c_bitvector_set_x (bv, cpu, SCM_BOOL_T);
1835     }
1836
1837   return bv;
1838 }
1839
1840 SCM_DEFINE (scm_getaffinity, "getaffinity", 1, 0, 0,
1841             (SCM pid),
1842             "Return a bitvector representing the CPU affinity mask for\n"
1843             "process @var{pid}.  Each CPU the process has affinity with\n"
1844             "has its corresponding bit set in the returned bitvector.\n"
1845             "The number of bits set is a good estimate of how many CPUs\n"
1846             "Guile can use without stepping on other processes' toes.\n\n"
1847             "Currently this procedure is only defined on GNU variants\n"
1848             "(@pxref{CPU Affinity, @code{sched_getaffinity},, libc, The\n"
1849             "GNU C Library Reference Manual}).\n")
1850 #define FUNC_NAME s_scm_getaffinity
1851 {
1852   int err;
1853   cpu_set_t cs;
1854
1855   CPU_ZERO (&cs);
1856   err = sched_getaffinity (scm_to_int (pid), sizeof (cs), &cs);
1857   if (err)
1858     SCM_SYSERROR;
1859
1860   return cpu_set_to_bitvector (&cs);
1861 }
1862 #undef FUNC_NAME
1863
1864 #endif /* HAVE_SCHED_GETAFFINITY */
1865
1866 #ifdef HAVE_SCHED_SETAFFINITY
1867
1868 SCM_DEFINE (scm_setaffinity, "setaffinity", 2, 0, 0,
1869             (SCM pid, SCM mask),
1870             "Install the CPU affinity mask @var{mask}, a bitvector, for\n"
1871             "the process or thread with ID @var{pid}.  The return value\n"
1872             "is unspecified.\n\n"
1873             "Currently this procedure is only defined on GNU variants\n"
1874             "(@pxref{CPU Affinity, @code{sched_setaffinity},, libc, The\n"
1875             "GNU C Library Reference Manual}).\n")
1876 #define FUNC_NAME s_scm_setaffinity
1877 {
1878   cpu_set_t cs;
1879   scm_t_array_handle handle;
1880   const scm_t_uint32 *c_mask;
1881   size_t len, off, cpu;
1882   ssize_t inc;
1883   int err;
1884
1885   c_mask = scm_bitvector_elements (mask, &handle, &off, &len, &inc);
1886
1887   CPU_ZERO (&cs);
1888   for (cpu = 0; cpu < len; cpu++)
1889     {
1890       size_t idx;
1891
1892       idx = cpu * inc + off;
1893       if (c_mask[idx / 32] & (1UL << (idx % 32)))
1894         CPU_SET (cpu, &cs);
1895     }
1896
1897   err = sched_setaffinity (scm_to_int (pid), sizeof (cs), &cs);
1898   if (err)
1899     SCM_SYSERROR;
1900
1901   return SCM_UNSPECIFIED;
1902 }
1903 #undef FUNC_NAME
1904
1905 #endif /* HAVE_SCHED_SETAFFINITY */
1906
1907 \f
1908 #if HAVE_GETPASS
1909 SCM_DEFINE (scm_getpass, "getpass", 1, 0, 0,
1910             (SCM prompt),
1911             "Display @var{prompt} to the standard error output and read\n"
1912             "a password from @file{/dev/tty}.  If this file is not\n"
1913             "accessible, it reads from standard input.  The password may be\n"
1914             "up to 127 characters in length.  Additional characters and the\n"
1915             "terminating newline character are discarded.  While reading\n"
1916             "the password, echoing and the generation of signals by special\n"
1917             "characters is disabled.")
1918 #define FUNC_NAME s_scm_getpass
1919 {
1920   char * p;
1921   SCM passwd;
1922
1923   SCM_VALIDATE_STRING (1, prompt);
1924
1925   WITH_STRING (prompt, c_prompt,
1926                p = getpass(c_prompt));
1927   passwd = scm_from_locale_string (p);
1928
1929   /* Clear out the password in the static buffer.  */
1930   memset (p, 0, strlen (p));
1931
1932   return passwd;
1933 }
1934 #undef FUNC_NAME
1935 #endif /* HAVE_GETPASS */
1936
1937 SCM_DEFINE (scm_flock, "flock", 2, 0, 0,
1938             (SCM file, SCM operation),
1939             "Apply or remove an advisory lock on an open file.\n"
1940             "@var{operation} specifies the action to be done:\n"
1941             "\n"
1942             "@defvar LOCK_SH\n"
1943             "Shared lock.  More than one process may hold a shared lock\n"
1944             "for a given file at a given time.\n"
1945             "@end defvar\n"
1946             "@defvar LOCK_EX\n"
1947             "Exclusive lock.  Only one process may hold an exclusive lock\n"
1948             "for a given file at a given time.\n"
1949             "@end defvar\n"
1950             "@defvar LOCK_UN\n"
1951             "Unlock the file.\n"
1952             "@end defvar\n"
1953             "@defvar LOCK_NB\n"
1954             "Don't block when locking.  This is combined with one of the\n"
1955             "other operations using @code{logior}.  If @code{flock} would\n"
1956             "block an @code{EWOULDBLOCK} error is thrown.\n"
1957             "@end defvar\n"
1958             "\n"
1959             "The return value is not specified. @var{file} may be an open\n"
1960             "file descriptor or an open file descriptor port.\n"
1961             "\n"
1962             "Note that @code{flock} does not lock files across NFS.")
1963 #define FUNC_NAME s_scm_flock
1964 {
1965   int fdes;
1966
1967   if (scm_is_integer (file))
1968     fdes = scm_to_int (file);
1969   else
1970     {
1971       SCM_VALIDATE_OPFPORT (2, file);
1972
1973       fdes = SCM_FPORT_FDES (file);
1974     }
1975   if (flock (fdes, scm_to_int (operation)) == -1)
1976     SCM_SYSERROR;
1977   return SCM_UNSPECIFIED;
1978 }
1979 #undef FUNC_NAME
1980
1981 #if HAVE_SETHOSTNAME
1982 SCM_DEFINE (scm_sethostname, "sethostname", 1, 0, 0,
1983             (SCM name),
1984             "Set the host name of the current processor to @var{name}. May\n"
1985             "only be used by the superuser.  The return value is not\n"
1986             "specified.")
1987 #define FUNC_NAME s_scm_sethostname
1988 {
1989   int rv;
1990
1991   WITH_STRING (name, c_name,
1992                rv = sethostname (c_name, strlen(c_name)));
1993   if (rv == -1)
1994     SCM_SYSERROR;
1995   return SCM_UNSPECIFIED;
1996 }
1997 #undef FUNC_NAME
1998 #endif /* HAVE_SETHOSTNAME */
1999
2000
2001 #if HAVE_GETHOSTNAME
2002 SCM_DEFINE (scm_gethostname, "gethostname", 0, 0, 0,
2003             (void),
2004             "Return the host name of the current processor.")
2005 #define FUNC_NAME s_scm_gethostname
2006 {
2007 #ifdef MAXHOSTNAMELEN
2008
2009   /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
2010    * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1".  */
2011   const int len = MAXHOSTNAMELEN + 1;
2012   char *const p = scm_malloc (len);
2013   const int res = gethostname (p, len);
2014
2015   scm_dynwind_begin (0);
2016   scm_dynwind_unwind_handler (free, p, 0);
2017
2018 #else
2019
2020   /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
2021    * large enough.  SUSv2 specifies 255 maximum too, apparently.  */
2022   int len = 256;
2023   int res;
2024   char *p;
2025
2026 #  if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
2027
2028   /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
2029    * which may reflect a particular kernel configuration.
2030    * Must watch out for this existing but giving -1, as happens for instance
2031    * in gnu/linux glibc 2.3.2.  */
2032   {
2033     const long int n = sysconf (_SC_HOST_NAME_MAX);
2034     if (n != -1L)
2035       len = n;
2036   }
2037
2038 #  endif
2039
2040   p = scm_malloc (len);
2041
2042   scm_dynwind_begin (0);
2043   scm_dynwind_unwind_handler (free, p, 0);
2044
2045   res = gethostname (p, len);
2046   while (res == -1 && errno == ENAMETOOLONG)
2047     {
2048       len *= 2;
2049
2050       /* scm_realloc may throw an exception.  */
2051       p = scm_realloc (p, len);
2052       res = gethostname (p, len);
2053     }
2054
2055 #endif
2056
2057   if (res == -1)
2058     {
2059       const int save_errno = errno;
2060
2061       /* No guile exceptions can occur before we have freed p's memory. */
2062       scm_dynwind_end ();
2063       free (p);
2064
2065       errno = save_errno;
2066       SCM_SYSERROR;
2067     }
2068   else
2069     {
2070       /* scm_from_locale_string may throw an exception.  */
2071       const SCM name = scm_from_locale_string (p);
2072
2073       /* No guile exceptions can occur before we have freed p's memory. */
2074       scm_dynwind_end ();
2075       free (p);
2076
2077       return name;
2078     }
2079 }
2080 #undef FUNC_NAME
2081 #endif /* HAVE_GETHOSTNAME */
2082
2083 \f
2084 void
2085 scm_init_posix ()
2086 {
2087   scm_add_feature ("posix");
2088 #ifdef HAVE_GETEUID
2089   scm_add_feature ("EIDs");
2090 #endif
2091 #ifdef WAIT_ANY
2092   scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY));
2093 #endif
2094 #ifdef WAIT_MYPGRP
2095   scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP));
2096 #endif
2097 #ifdef WNOHANG
2098   scm_c_define ("WNOHANG", scm_from_int (WNOHANG));
2099 #endif
2100 #ifdef WUNTRACED
2101   scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED));
2102 #endif
2103
2104 #ifdef LC_COLLATE
2105   scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE));
2106 #endif
2107 #ifdef LC_CTYPE
2108   scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE));
2109 #endif
2110 #ifdef LC_MONETARY
2111   scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY));
2112 #endif
2113 #ifdef LC_NUMERIC
2114   scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC));
2115 #endif
2116 #ifdef LC_TIME
2117   scm_c_define ("LC_TIME", scm_from_int (LC_TIME));
2118 #endif
2119 #ifdef LC_MESSAGES
2120   scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES));
2121 #endif
2122 #ifdef LC_ALL
2123   scm_c_define ("LC_ALL", scm_from_int (LC_ALL));
2124 #endif
2125 #ifdef LC_PAPER
2126   scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER));
2127 #endif
2128 #ifdef LC_NAME
2129   scm_c_define ("LC_NAME", scm_from_int (LC_NAME));
2130 #endif
2131 #ifdef LC_ADDRESS
2132   scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS));
2133 #endif
2134 #ifdef LC_TELEPHONE
2135   scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE));
2136 #endif
2137 #ifdef LC_MEASUREMENT
2138   scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT));
2139 #endif
2140 #ifdef LC_IDENTIFICATION
2141   scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION));
2142 #endif
2143 #ifdef PIPE_BUF
2144   scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF));
2145 #endif
2146
2147 #ifdef PRIO_PROCESS
2148   scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS));
2149 #endif
2150 #ifdef PRIO_PGRP
2151   scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP));
2152 #endif
2153 #ifdef PRIO_USER
2154   scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER));
2155 #endif
2156
2157 #ifdef LOCK_SH
2158   scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH));
2159 #endif
2160 #ifdef LOCK_EX
2161   scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX));
2162 #endif
2163 #ifdef LOCK_UN
2164   scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN));
2165 #endif
2166 #ifdef LOCK_NB
2167   scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB));
2168 #endif
2169
2170 #include "libguile/cpp-SIG.c"
2171 #include "libguile/posix.x"
2172 }
2173
2174 /*
2175   Local Variables:
2176   c-file-style: "gnu"
2177   End:
2178 */