| 1 | /* Synchronous subprocess invocation for GNU Emacs. |
| 2 | |
| 3 | Copyright (C) 1985-1988, 1993-1995, 1999-2014 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | |
| 22 | #include <config.h> |
| 23 | #include <errno.h> |
| 24 | #include <stdio.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include <sys/file.h> |
| 29 | #include <fcntl.h> |
| 30 | |
| 31 | #include "lisp.h" |
| 32 | |
| 33 | #ifdef WINDOWSNT |
| 34 | #define NOMINMAX |
| 35 | #include <sys/socket.h> /* for fcntl */ |
| 36 | #include <windows.h> |
| 37 | #include "w32.h" |
| 38 | #define _P_NOWAIT 1 /* from process.h */ |
| 39 | #endif |
| 40 | |
| 41 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
| 42 | #include <sys/stat.h> |
| 43 | #include <sys/param.h> |
| 44 | #endif /* MSDOS */ |
| 45 | |
| 46 | #include "commands.h" |
| 47 | #include "character.h" |
| 48 | #include "buffer.h" |
| 49 | #include "ccl.h" |
| 50 | #include "coding.h" |
| 51 | #include "composite.h" |
| 52 | #include <epaths.h> |
| 53 | #include "process.h" |
| 54 | #include "syssignal.h" |
| 55 | #include "systty.h" |
| 56 | #include "syswait.h" |
| 57 | #include "blockinput.h" |
| 58 | #include "frame.h" |
| 59 | #include "termhooks.h" |
| 60 | |
| 61 | #ifdef MSDOS |
| 62 | #include "msdos.h" |
| 63 | #endif |
| 64 | |
| 65 | #ifdef HAVE_NS |
| 66 | #include "nsterm.h" |
| 67 | #endif |
| 68 | |
| 69 | /* Pattern used by call-process-region to make temp files. */ |
| 70 | static Lisp_Object Vtemp_file_name_pattern; |
| 71 | |
| 72 | /* The next two variables are used while record-unwind-protect is in place |
| 73 | during call-process for a subprocess for which record_deleted_pid has |
| 74 | not yet been called. At other times, synch_process_pid is zero and |
| 75 | synch_process_tempfile's contents are irrelevant. Doing this via static |
| 76 | C variables is more convenient than putting them into the arguments |
| 77 | of record-unwind-protect, as they need to be updated at randomish |
| 78 | times in the code, and Lisp cannot always store these values as |
| 79 | Emacs integers. It's safe to use static variables here, as the |
| 80 | code is never invoked reentrantly. */ |
| 81 | |
| 82 | /* If nonzero, a process-ID that has not been reaped. */ |
| 83 | static pid_t synch_process_pid; |
| 84 | |
| 85 | /* If a string, the name of a temp file that has not been removed. */ |
| 86 | #ifdef MSDOS |
| 87 | static Lisp_Object synch_process_tempfile; |
| 88 | #else |
| 89 | # define synch_process_tempfile make_number (0) |
| 90 | #endif |
| 91 | |
| 92 | /* Indexes of file descriptors that need closing on call_process_kill. */ |
| 93 | enum |
| 94 | { |
| 95 | /* The subsidiary process's stdout and stderr. stdin is handled |
| 96 | separately, in either Fcall_process_region or create_temp_file. */ |
| 97 | CALLPROC_STDOUT, CALLPROC_STDERR, |
| 98 | |
| 99 | /* How to read from a pipe (or substitute) from the subsidiary process. */ |
| 100 | CALLPROC_PIPEREAD, |
| 101 | |
| 102 | /* A bound on the number of file descriptors. */ |
| 103 | CALLPROC_FDS |
| 104 | }; |
| 105 | |
| 106 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int, ptrdiff_t); |
| 107 | \f |
| 108 | |
| 109 | #ifndef MSDOS |
| 110 | /* Block SIGCHLD. */ |
| 111 | |
| 112 | void |
| 113 | block_child_signal (sigset_t *oldset) |
| 114 | { |
| 115 | sigset_t blocked; |
| 116 | sigemptyset (&blocked); |
| 117 | sigaddset (&blocked, SIGCHLD); |
| 118 | pthread_sigmask (SIG_BLOCK, &blocked, oldset); |
| 119 | } |
| 120 | |
| 121 | /* Unblock SIGCHLD. */ |
| 122 | |
| 123 | void |
| 124 | unblock_child_signal (sigset_t const *oldset) |
| 125 | { |
| 126 | pthread_sigmask (SIG_SETMASK, oldset, 0); |
| 127 | } |
| 128 | |
| 129 | #endif /* !MSDOS */ |
| 130 | |
| 131 | /* Return the current buffer's working directory, or the home |
| 132 | directory if it's unreachable, as a string suitable for a system call. |
| 133 | Signal an error if the result would not be an accessible directory. */ |
| 134 | |
| 135 | Lisp_Object |
| 136 | encode_current_directory (void) |
| 137 | { |
| 138 | Lisp_Object dir; |
| 139 | struct gcpro gcpro1; |
| 140 | |
| 141 | dir = BVAR (current_buffer, directory); |
| 142 | GCPRO1 (dir); |
| 143 | |
| 144 | dir = Funhandled_file_name_directory (dir); |
| 145 | |
| 146 | /* If the file name handler says that dir is unreachable, use |
| 147 | a sensible default. */ |
| 148 | if (NILP (dir)) |
| 149 | dir = build_string ("~"); |
| 150 | |
| 151 | dir = expand_and_dir_to_file (dir, Qnil); |
| 152 | |
| 153 | if (STRING_MULTIBYTE (dir)) |
| 154 | dir = ENCODE_FILE (dir); |
| 155 | if (! file_accessible_directory_p (SSDATA (dir))) |
| 156 | report_file_error ("Setting current directory", |
| 157 | BVAR (current_buffer, directory)); |
| 158 | |
| 159 | RETURN_UNGCPRO (dir); |
| 160 | } |
| 161 | |
| 162 | /* If P is reapable, record it as a deleted process and kill it. |
| 163 | Do this in a critical section. Unless PID is wedged it will be |
| 164 | reaped on receipt of the first SIGCHLD after the critical section. */ |
| 165 | |
| 166 | void |
| 167 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
| 168 | { |
| 169 | #ifndef MSDOS |
| 170 | sigset_t oldset; |
| 171 | block_child_signal (&oldset); |
| 172 | |
| 173 | if (p->alive) |
| 174 | { |
| 175 | record_deleted_pid (p->pid, tempfile); |
| 176 | p->alive = 0; |
| 177 | kill (- p->pid, SIGKILL); |
| 178 | } |
| 179 | |
| 180 | unblock_child_signal (&oldset); |
| 181 | #endif /* !MSDOS */ |
| 182 | } |
| 183 | |
| 184 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
| 185 | |
| 186 | static void |
| 187 | delete_temp_file (Lisp_Object name) |
| 188 | { |
| 189 | unlink (SSDATA (name)); |
| 190 | } |
| 191 | |
| 192 | static void |
| 193 | call_process_kill (void *ptr) |
| 194 | { |
| 195 | int *callproc_fd = ptr; |
| 196 | int i; |
| 197 | for (i = 0; i < CALLPROC_FDS; i++) |
| 198 | if (0 <= callproc_fd[i]) |
| 199 | emacs_close (callproc_fd[i]); |
| 200 | |
| 201 | if (synch_process_pid) |
| 202 | { |
| 203 | struct Lisp_Process proc; |
| 204 | proc.alive = 1; |
| 205 | proc.pid = synch_process_pid; |
| 206 | record_kill_process (&proc, synch_process_tempfile); |
| 207 | synch_process_pid = 0; |
| 208 | } |
| 209 | else if (STRINGP (synch_process_tempfile)) |
| 210 | delete_temp_file (synch_process_tempfile); |
| 211 | } |
| 212 | |
| 213 | /* Clean up when exiting Fcall_process: restore the buffer, and |
| 214 | kill the subsidiary process group if the process still exists. */ |
| 215 | |
| 216 | static void |
| 217 | call_process_cleanup (Lisp_Object buffer) |
| 218 | { |
| 219 | Fset_buffer (buffer); |
| 220 | |
| 221 | #ifndef MSDOS |
| 222 | if (synch_process_pid) |
| 223 | { |
| 224 | kill (-synch_process_pid, SIGINT); |
| 225 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
| 226 | immediate_quit = 1; |
| 227 | QUIT; |
| 228 | wait_for_termination (synch_process_pid, 0, 1); |
| 229 | synch_process_pid = 0; |
| 230 | immediate_quit = 0; |
| 231 | message1 ("Waiting for process to die...done"); |
| 232 | } |
| 233 | #endif /* !MSDOS */ |
| 234 | } |
| 235 | |
| 236 | #ifdef DOS_NT |
| 237 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; |
| 238 | #else |
| 239 | static mode_t const default_output_mode = 0666; |
| 240 | #endif |
| 241 | |
| 242 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
| 243 | doc: /* Call PROGRAM synchronously in separate process. |
| 244 | The remaining arguments are optional. |
| 245 | The program's input comes from file INFILE (nil means `/dev/null'). |
| 246 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
| 247 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
| 248 | FILE is a file name string, means that it should be written to that file |
| 249 | \(if the file already exists it is overwritten). |
| 250 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
| 251 | REAL-BUFFER says what to do with standard output, as above, |
| 252 | while STDERR-FILE says what to do with standard error in the child. |
| 253 | STDERR-FILE may be nil (discard standard error output), |
| 254 | t (mix it with ordinary output), or a file name string. |
| 255 | |
| 256 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. |
| 257 | Remaining arguments are strings passed as command arguments to PROGRAM. |
| 258 | |
| 259 | If executable PROGRAM can't be found as an executable, `call-process' |
| 260 | signals a Lisp error. `call-process' reports errors in execution of |
| 261 | the program only through its return and output. |
| 262 | |
| 263 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
| 264 | Otherwise it waits for PROGRAM to terminate |
| 265 | and returns a numeric exit status or a signal description string. |
| 266 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
| 267 | |
| 268 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
| 269 | (ptrdiff_t nargs, Lisp_Object *args) |
| 270 | { |
| 271 | Lisp_Object infile, encoded_infile; |
| 272 | int filefd; |
| 273 | struct gcpro gcpro1; |
| 274 | ptrdiff_t count = SPECPDL_INDEX (); |
| 275 | |
| 276 | if (nargs >= 2 && ! NILP (args[1])) |
| 277 | { |
| 278 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
| 279 | CHECK_STRING (infile); |
| 280 | } |
| 281 | else |
| 282 | infile = build_string (NULL_DEVICE); |
| 283 | |
| 284 | GCPRO1 (infile); |
| 285 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; |
| 286 | |
| 287 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); |
| 288 | if (filefd < 0) |
| 289 | report_file_error ("Opening process input file", infile); |
| 290 | record_unwind_protect_int (close_file_unwind, filefd); |
| 291 | UNGCPRO; |
| 292 | return unbind_to (count, call_process (nargs, args, filefd, -1)); |
| 293 | } |
| 294 | |
| 295 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. |
| 296 | |
| 297 | If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an |
| 298 | unwinder that is intended to remove the input temporary file; in |
| 299 | this case NARGS must be at least 2 and ARGS[1] is the file's name. |
| 300 | |
| 301 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ |
| 302 | |
| 303 | static Lisp_Object |
| 304 | call_process (ptrdiff_t nargs, Lisp_Object *args, int filefd, |
| 305 | ptrdiff_t tempfile_index) |
| 306 | { |
| 307 | Lisp_Object buffer, current_dir, path; |
| 308 | bool display_p; |
| 309 | int fd0; |
| 310 | int callproc_fd[CALLPROC_FDS]; |
| 311 | int status; |
| 312 | ptrdiff_t i; |
| 313 | ptrdiff_t count = SPECPDL_INDEX (); |
| 314 | USE_SAFE_ALLOCA; |
| 315 | |
| 316 | char **new_argv; |
| 317 | /* File to use for stderr in the child. |
| 318 | t means use same as standard output. */ |
| 319 | Lisp_Object error_file; |
| 320 | Lisp_Object output_file = Qnil; |
| 321 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
| 322 | char *tempfile = NULL; |
| 323 | int pid; |
| 324 | #else |
| 325 | sigset_t oldset; |
| 326 | pid_t pid; |
| 327 | #endif |
| 328 | int child_errno; |
| 329 | int fd_output, fd_error; |
| 330 | struct coding_system process_coding; /* coding-system of process output */ |
| 331 | struct coding_system argument_coding; /* coding-system of arguments */ |
| 332 | /* Set to the return value of Ffind_operation_coding_system. */ |
| 333 | Lisp_Object coding_systems; |
| 334 | bool discard_output; |
| 335 | |
| 336 | if (synch_process_pid) |
| 337 | error ("call-process invoked recursively"); |
| 338 | |
| 339 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ |
| 340 | coding_systems = Qt; |
| 341 | |
| 342 | CHECK_STRING (args[0]); |
| 343 | |
| 344 | error_file = Qt; |
| 345 | |
| 346 | #ifndef subprocesses |
| 347 | /* Without asynchronous processes we cannot have BUFFER == 0. */ |
| 348 | if (nargs >= 3 |
| 349 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
| 350 | error ("Operating system cannot handle asynchronous subprocesses"); |
| 351 | #endif /* subprocesses */ |
| 352 | |
| 353 | /* Decide the coding-system for giving arguments. */ |
| 354 | { |
| 355 | Lisp_Object val, *args2; |
| 356 | |
| 357 | /* If arguments are supplied, we may have to encode them. */ |
| 358 | if (nargs >= 5) |
| 359 | { |
| 360 | bool must_encode = 0; |
| 361 | Lisp_Object coding_attrs; |
| 362 | |
| 363 | for (i = 4; i < nargs; i++) |
| 364 | CHECK_STRING (args[i]); |
| 365 | |
| 366 | for (i = 4; i < nargs; i++) |
| 367 | if (STRING_MULTIBYTE (args[i])) |
| 368 | must_encode = 1; |
| 369 | |
| 370 | if (!NILP (Vcoding_system_for_write)) |
| 371 | val = Vcoding_system_for_write; |
| 372 | else if (! must_encode) |
| 373 | val = Qraw_text; |
| 374 | else |
| 375 | { |
| 376 | SAFE_NALLOCA (args2, 1, nargs + 1); |
| 377 | args2[0] = Qcall_process; |
| 378 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 379 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
| 380 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
| 381 | } |
| 382 | val = complement_process_encoding_system (val); |
| 383 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
| 384 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
| 385 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) |
| 386 | { |
| 387 | /* We should not use an ASCII incompatible coding system. */ |
| 388 | val = raw_text_coding_system (val); |
| 389 | setup_coding_system (val, &argument_coding); |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | if (nargs < 3) |
| 395 | buffer = Qnil; |
| 396 | else |
| 397 | { |
| 398 | buffer = args[2]; |
| 399 | |
| 400 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
| 401 | FILE-FOR-STDERR), unless the first element is :file, in which case see |
| 402 | the next paragraph. */ |
| 403 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
| 404 | { |
| 405 | if (CONSP (XCDR (buffer))) |
| 406 | { |
| 407 | Lisp_Object stderr_file; |
| 408 | stderr_file = XCAR (XCDR (buffer)); |
| 409 | |
| 410 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) |
| 411 | error_file = stderr_file; |
| 412 | else |
| 413 | error_file = Fexpand_file_name (stderr_file, Qnil); |
| 414 | } |
| 415 | |
| 416 | buffer = XCAR (buffer); |
| 417 | } |
| 418 | |
| 419 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
| 420 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
| 421 | { |
| 422 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), |
| 423 | BVAR (current_buffer, directory)); |
| 424 | CHECK_STRING (output_file); |
| 425 | buffer = Qnil; |
| 426 | } |
| 427 | |
| 428 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
| 429 | { |
| 430 | Lisp_Object spec_buffer; |
| 431 | spec_buffer = buffer; |
| 432 | buffer = Fget_buffer_create (buffer); |
| 433 | /* Mention the buffer name for a better error message. */ |
| 434 | if (NILP (buffer)) |
| 435 | CHECK_BUFFER (spec_buffer); |
| 436 | CHECK_BUFFER (buffer); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* Make sure that the child will be able to chdir to the current |
| 441 | buffer's current directory, or its unhandled equivalent. We |
| 442 | can't just have the child check for an error when it does the |
| 443 | chdir, since it's in a vfork. |
| 444 | |
| 445 | We have to GCPRO around this because Fexpand_file_name, |
| 446 | Funhandled_file_name_directory, and Ffile_accessible_directory_p |
| 447 | might call a file name handling function. The argument list is |
| 448 | protected by the caller, so all we really have to worry about is |
| 449 | buffer. */ |
| 450 | { |
| 451 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 452 | |
| 453 | current_dir = encode_current_directory (); |
| 454 | |
| 455 | GCPRO4 (buffer, current_dir, error_file, output_file); |
| 456 | |
| 457 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) |
| 458 | error_file = ENCODE_FILE (error_file); |
| 459 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
| 460 | output_file = ENCODE_FILE (output_file); |
| 461 | UNGCPRO; |
| 462 | } |
| 463 | |
| 464 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
| 465 | |
| 466 | for (i = 0; i < CALLPROC_FDS; i++) |
| 467 | callproc_fd[i] = -1; |
| 468 | #ifdef MSDOS |
| 469 | synch_process_tempfile = make_number (0); |
| 470 | #endif |
| 471 | record_unwind_protect_ptr (call_process_kill, callproc_fd); |
| 472 | |
| 473 | /* Search for program; barf if not found. */ |
| 474 | { |
| 475 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 476 | int ok; |
| 477 | |
| 478 | GCPRO3 (buffer, current_dir, error_file); |
| 479 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, |
| 480 | make_number (X_OK), false); |
| 481 | UNGCPRO; |
| 482 | if (ok < 0) |
| 483 | report_file_error ("Searching for program", args[0]); |
| 484 | } |
| 485 | |
| 486 | /* If program file name starts with /: for quoting a magic name, |
| 487 | discard that. */ |
| 488 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' |
| 489 | && SREF (path, 1) == ':') |
| 490 | path = Fsubstring (path, make_number (2), Qnil); |
| 491 | |
| 492 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
| 493 | |
| 494 | { |
| 495 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 496 | |
| 497 | GCPRO4 (buffer, current_dir, path, error_file); |
| 498 | if (nargs > 4) |
| 499 | { |
| 500 | ptrdiff_t i; |
| 501 | |
| 502 | argument_coding.dst_multibyte = 0; |
| 503 | for (i = 4; i < nargs; i++) |
| 504 | { |
| 505 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
| 506 | if (CODING_REQUIRE_ENCODING (&argument_coding)) |
| 507 | /* We must encode this argument. */ |
| 508 | args[i] = encode_coding_string (&argument_coding, args[i], 1); |
| 509 | } |
| 510 | for (i = 4; i < nargs; i++) |
| 511 | new_argv[i - 3] = SSDATA (args[i]); |
| 512 | new_argv[i - 3] = 0; |
| 513 | } |
| 514 | else |
| 515 | new_argv[1] = 0; |
| 516 | if (STRING_MULTIBYTE (path)) |
| 517 | path = ENCODE_FILE (path); |
| 518 | new_argv[0] = SSDATA (path); |
| 519 | UNGCPRO; |
| 520 | } |
| 521 | |
| 522 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
| 523 | |
| 524 | #ifdef MSDOS |
| 525 | if (! discard_output && ! STRINGP (output_file)) |
| 526 | { |
| 527 | char const *tmpdir = egetenv ("TMPDIR"); |
| 528 | char const *outf = tmpdir ? tmpdir : ""; |
| 529 | tempfile = alloca (strlen (outf) + 20); |
| 530 | strcpy (tempfile, outf); |
| 531 | dostounix_filename (tempfile); |
| 532 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
| 533 | strcat (tempfile, "/"); |
| 534 | strcat (tempfile, "emXXXXXX"); |
| 535 | mktemp (tempfile); |
| 536 | if (!*tempfile) |
| 537 | report_file_error ("Opening process output file", Qnil); |
| 538 | output_file = build_string (tempfile); |
| 539 | synch_process_tempfile = output_file; |
| 540 | } |
| 541 | #endif |
| 542 | |
| 543 | if (discard_output) |
| 544 | { |
| 545 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
| 546 | if (fd_output < 0) |
| 547 | report_file_error ("Opening null device", Qnil); |
| 548 | } |
| 549 | else if (STRINGP (output_file)) |
| 550 | { |
| 551 | fd_output = emacs_open (SSDATA (output_file), |
| 552 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
| 553 | default_output_mode); |
| 554 | if (fd_output < 0) |
| 555 | { |
| 556 | int open_errno = errno; |
| 557 | output_file = DECODE_FILE (output_file); |
| 558 | report_file_errno ("Opening process output file", |
| 559 | output_file, open_errno); |
| 560 | } |
| 561 | } |
| 562 | else |
| 563 | { |
| 564 | int fd[2]; |
| 565 | if (emacs_pipe (fd) != 0) |
| 566 | report_file_error ("Creating process pipe", Qnil); |
| 567 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; |
| 568 | fd_output = fd[1]; |
| 569 | } |
| 570 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
| 571 | |
| 572 | fd_error = fd_output; |
| 573 | |
| 574 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
| 575 | { |
| 576 | fd_error = emacs_open ((STRINGP (error_file) |
| 577 | ? SSDATA (error_file) |
| 578 | : NULL_DEVICE), |
| 579 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
| 580 | default_output_mode); |
| 581 | if (fd_error < 0) |
| 582 | { |
| 583 | int open_errno = errno; |
| 584 | report_file_errno ("Cannot redirect stderr", |
| 585 | (STRINGP (error_file) |
| 586 | ? DECODE_FILE (error_file) |
| 587 | : build_string (NULL_DEVICE)), |
| 588 | open_errno); |
| 589 | } |
| 590 | callproc_fd[CALLPROC_STDERR] = fd_error; |
| 591 | } |
| 592 | |
| 593 | #ifdef MSDOS /* MW, July 1993 */ |
| 594 | /* Note that on MSDOS `child_setup' actually returns the child process |
| 595 | exit status, not its PID, so assign it to status below. */ |
| 596 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
| 597 | |
| 598 | if (pid < 0) |
| 599 | { |
| 600 | child_errno = errno; |
| 601 | unbind_to (count, Qnil); |
| 602 | synchronize_system_messages_locale (); |
| 603 | return |
| 604 | code_convert_string_norecord (build_string (strerror (child_errno)), |
| 605 | Vlocale_coding_system, 0); |
| 606 | } |
| 607 | status = pid; |
| 608 | |
| 609 | for (i = 0; i < CALLPROC_FDS; i++) |
| 610 | if (0 <= callproc_fd[i]) |
| 611 | { |
| 612 | emacs_close (callproc_fd[i]); |
| 613 | callproc_fd[i] = -1; |
| 614 | } |
| 615 | emacs_close (filefd); |
| 616 | clear_unwind_protect (count - 1); |
| 617 | |
| 618 | if (tempfile) |
| 619 | { |
| 620 | /* Since CRLF is converted to LF within `decode_coding', we |
| 621 | can always open a file with binary mode. */ |
| 622 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, |
| 623 | O_RDONLY | O_BINARY, 0); |
| 624 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) |
| 625 | { |
| 626 | int open_errno = errno; |
| 627 | report_file_errno ("Cannot re-open temporary file", |
| 628 | build_string (tempfile), open_errno); |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | #endif /* MSDOS */ |
| 633 | |
| 634 | /* Do the unwind-protect now, even though the pid is not known, so |
| 635 | that no storage allocation is done in the critical section. |
| 636 | The actual PID will be filled in during the critical section. */ |
| 637 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); |
| 638 | |
| 639 | #ifndef MSDOS |
| 640 | |
| 641 | block_input (); |
| 642 | block_child_signal (&oldset); |
| 643 | |
| 644 | #ifdef WINDOWSNT |
| 645 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
| 646 | #else /* not WINDOWSNT */ |
| 647 | |
| 648 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
| 649 | { |
| 650 | Lisp_Object volatile buffer_volatile = buffer; |
| 651 | Lisp_Object volatile coding_systems_volatile = coding_systems; |
| 652 | Lisp_Object volatile current_dir_volatile = current_dir; |
| 653 | bool volatile display_p_volatile = display_p; |
| 654 | bool volatile sa_must_free_volatile = sa_must_free; |
| 655 | int volatile fd_error_volatile = fd_error; |
| 656 | int volatile filefd_volatile = filefd; |
| 657 | ptrdiff_t volatile count_volatile = count; |
| 658 | ptrdiff_t volatile sa_count_volatile = sa_count; |
| 659 | char **volatile new_argv_volatile = new_argv; |
| 660 | int volatile callproc_fd_volatile[CALLPROC_FDS]; |
| 661 | for (i = 0; i < CALLPROC_FDS; i++) |
| 662 | callproc_fd_volatile[i] = callproc_fd[i]; |
| 663 | |
| 664 | pid = vfork (); |
| 665 | |
| 666 | buffer = buffer_volatile; |
| 667 | coding_systems = coding_systems_volatile; |
| 668 | current_dir = current_dir_volatile; |
| 669 | display_p = display_p_volatile; |
| 670 | sa_must_free = sa_must_free_volatile; |
| 671 | fd_error = fd_error_volatile; |
| 672 | filefd = filefd_volatile; |
| 673 | count = count_volatile; |
| 674 | sa_count = sa_count_volatile; |
| 675 | new_argv = new_argv_volatile; |
| 676 | |
| 677 | for (i = 0; i < CALLPROC_FDS; i++) |
| 678 | callproc_fd[i] = callproc_fd_volatile[i]; |
| 679 | fd_output = callproc_fd[CALLPROC_STDOUT]; |
| 680 | } |
| 681 | |
| 682 | if (pid == 0) |
| 683 | { |
| 684 | unblock_child_signal (&oldset); |
| 685 | |
| 686 | setsid (); |
| 687 | |
| 688 | /* Emacs ignores SIGPIPE, but the child should not. */ |
| 689 | signal (SIGPIPE, SIG_DFL); |
| 690 | /* Likewise for SIGPROF. */ |
| 691 | #ifdef SIGPROF |
| 692 | signal (SIGPROF, SIG_DFL); |
| 693 | #endif |
| 694 | |
| 695 | child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
| 696 | } |
| 697 | |
| 698 | #endif /* not WINDOWSNT */ |
| 699 | |
| 700 | child_errno = errno; |
| 701 | |
| 702 | if (pid > 0) |
| 703 | { |
| 704 | synch_process_pid = pid; |
| 705 | |
| 706 | if (INTEGERP (buffer)) |
| 707 | { |
| 708 | if (tempfile_index < 0) |
| 709 | record_deleted_pid (pid, Qnil); |
| 710 | else |
| 711 | { |
| 712 | eassert (1 < nargs); |
| 713 | record_deleted_pid (pid, args[1]); |
| 714 | clear_unwind_protect (tempfile_index); |
| 715 | } |
| 716 | synch_process_pid = 0; |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | unblock_child_signal (&oldset); |
| 721 | unblock_input (); |
| 722 | |
| 723 | if (pid < 0) |
| 724 | report_file_errno ("Doing vfork", Qnil, child_errno); |
| 725 | |
| 726 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
| 727 | since we will use that to read input from. */ |
| 728 | for (i = 0; i < CALLPROC_FDS; i++) |
| 729 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) |
| 730 | { |
| 731 | emacs_close (callproc_fd[i]); |
| 732 | callproc_fd[i] = -1; |
| 733 | } |
| 734 | emacs_close (filefd); |
| 735 | clear_unwind_protect (count - 1); |
| 736 | |
| 737 | #endif /* not MSDOS */ |
| 738 | |
| 739 | if (INTEGERP (buffer)) |
| 740 | return unbind_to (count, Qnil); |
| 741 | |
| 742 | if (BUFFERP (buffer)) |
| 743 | Fset_buffer (buffer); |
| 744 | |
| 745 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
| 746 | |
| 747 | if (0 <= fd0) |
| 748 | { |
| 749 | Lisp_Object val, *args2; |
| 750 | |
| 751 | val = Qnil; |
| 752 | if (!NILP (Vcoding_system_for_read)) |
| 753 | val = Vcoding_system_for_read; |
| 754 | else |
| 755 | { |
| 756 | if (EQ (coding_systems, Qt)) |
| 757 | { |
| 758 | ptrdiff_t i; |
| 759 | |
| 760 | SAFE_NALLOCA (args2, 1, nargs + 1); |
| 761 | args2[0] = Qcall_process; |
| 762 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 763 | coding_systems |
| 764 | = Ffind_operation_coding_system (nargs + 1, args2); |
| 765 | } |
| 766 | if (CONSP (coding_systems)) |
| 767 | val = XCAR (coding_systems); |
| 768 | else if (CONSP (Vdefault_process_coding_system)) |
| 769 | val = XCAR (Vdefault_process_coding_system); |
| 770 | else |
| 771 | val = Qnil; |
| 772 | } |
| 773 | Fcheck_coding_system (val); |
| 774 | /* In unibyte mode, character code conversion should not take |
| 775 | place but EOL conversion should. So, setup raw-text or one |
| 776 | of the subsidiary according to the information just setup. */ |
| 777 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
| 778 | && !NILP (val)) |
| 779 | val = raw_text_coding_system (val); |
| 780 | setup_coding_system (val, &process_coding); |
| 781 | process_coding.dst_multibyte |
| 782 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
| 783 | process_coding.src_multibyte = 0; |
| 784 | } |
| 785 | |
| 786 | immediate_quit = 1; |
| 787 | QUIT; |
| 788 | |
| 789 | if (0 <= fd0) |
| 790 | { |
| 791 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
| 792 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; |
| 793 | char buf[CALLPROC_BUFFER_SIZE_MAX]; |
| 794 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; |
| 795 | int nread; |
| 796 | EMACS_INT total_read = 0; |
| 797 | int carryover = 0; |
| 798 | bool display_on_the_fly = display_p; |
| 799 | struct coding_system saved_coding = process_coding; |
| 800 | |
| 801 | while (1) |
| 802 | { |
| 803 | /* Repeatedly read until we've filled as much as possible |
| 804 | of the buffer size we have. But don't read |
| 805 | less than 1024--save that for the next bufferful. */ |
| 806 | nread = carryover; |
| 807 | while (nread < bufsize - 1024) |
| 808 | { |
| 809 | int this_read = emacs_read (fd0, buf + nread, |
| 810 | bufsize - nread); |
| 811 | |
| 812 | if (this_read < 0) |
| 813 | goto give_up; |
| 814 | |
| 815 | if (this_read == 0) |
| 816 | { |
| 817 | process_coding.mode |= CODING_MODE_LAST_BLOCK; |
| 818 | break; |
| 819 | } |
| 820 | |
| 821 | nread += this_read; |
| 822 | total_read += this_read; |
| 823 | |
| 824 | if (display_on_the_fly) |
| 825 | break; |
| 826 | } |
| 827 | |
| 828 | /* Now NREAD is the total amount of data in the buffer. */ |
| 829 | immediate_quit = 0; |
| 830 | |
| 831 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
| 832 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) |
| 833 | insert_1_both (buf, nread, nread, 0, 1, 0); |
| 834 | else |
| 835 | { /* We have to decode the input. */ |
| 836 | Lisp_Object curbuf; |
| 837 | ptrdiff_t count1 = SPECPDL_INDEX (); |
| 838 | |
| 839 | XSETBUFFER (curbuf, current_buffer); |
| 840 | prepare_to_modify_buffer (PT, PT, NULL); |
| 841 | /* We cannot allow after-change-functions be run |
| 842 | during decoding, because that might modify the |
| 843 | buffer, while we rely on process_coding.produced to |
| 844 | faithfully reflect inserted text until we |
| 845 | TEMP_SET_PT_BOTH below. */ |
| 846 | specbind (Qinhibit_modification_hooks, Qt); |
| 847 | decode_coding_c_string (&process_coding, |
| 848 | (unsigned char *) buf, nread, curbuf); |
| 849 | unbind_to (count1, Qnil); |
| 850 | if (display_on_the_fly |
| 851 | && CODING_REQUIRE_DETECTION (&saved_coding) |
| 852 | && ! CODING_REQUIRE_DETECTION (&process_coding)) |
| 853 | { |
| 854 | /* We have detected some coding system, but the |
| 855 | detection may have been via insufficient data. |
| 856 | So give up displaying on the fly. */ |
| 857 | if (process_coding.produced > 0) |
| 858 | del_range_2 (process_coding.dst_pos, |
| 859 | process_coding.dst_pos_byte, |
| 860 | (process_coding.dst_pos |
| 861 | + process_coding.produced_char), |
| 862 | (process_coding.dst_pos_byte |
| 863 | + process_coding.produced), |
| 864 | 0); |
| 865 | display_on_the_fly = 0; |
| 866 | process_coding = saved_coding; |
| 867 | carryover = nread; |
| 868 | /* Make the above condition always fail in the future. */ |
| 869 | saved_coding.common_flags |
| 870 | &= ~CODING_REQUIRE_DETECTION_MASK; |
| 871 | continue; |
| 872 | } |
| 873 | |
| 874 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, |
| 875 | PT_BYTE + process_coding.produced); |
| 876 | carryover = process_coding.carryover_bytes; |
| 877 | if (carryover > 0) |
| 878 | memcpy (buf, process_coding.carryover, |
| 879 | process_coding.carryover_bytes); |
| 880 | } |
| 881 | |
| 882 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
| 883 | break; |
| 884 | |
| 885 | /* Make the buffer bigger as we continue to read more data, |
| 886 | but not past CALLPROC_BUFFER_SIZE_MAX. */ |
| 887 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) |
| 888 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) |
| 889 | bufsize = CALLPROC_BUFFER_SIZE_MAX; |
| 890 | |
| 891 | if (display_p) |
| 892 | { |
| 893 | redisplay_preserve_echo_area (1); |
| 894 | /* This variable might have been set to 0 for code |
| 895 | detection. In that case, set it back to 1 because |
| 896 | we should have already detected a coding system. */ |
| 897 | display_on_the_fly = 1; |
| 898 | } |
| 899 | immediate_quit = 1; |
| 900 | QUIT; |
| 901 | } |
| 902 | give_up: ; |
| 903 | |
| 904 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); |
| 905 | /* If the caller required, let the buffer inherit the |
| 906 | coding-system used to decode the process output. */ |
| 907 | if (inherit_process_coding_system) |
| 908 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), |
| 909 | make_number (total_read)); |
| 910 | } |
| 911 | |
| 912 | #ifndef MSDOS |
| 913 | /* Wait for it to terminate, unless it already has. */ |
| 914 | wait_for_termination (pid, &status, fd0 < 0); |
| 915 | #endif |
| 916 | |
| 917 | immediate_quit = 0; |
| 918 | |
| 919 | /* Don't kill any children that the subprocess may have left behind |
| 920 | when exiting. */ |
| 921 | synch_process_pid = 0; |
| 922 | |
| 923 | SAFE_FREE (); |
| 924 | unbind_to (count, Qnil); |
| 925 | |
| 926 | if (WIFSIGNALED (status)) |
| 927 | { |
| 928 | const char *signame; |
| 929 | |
| 930 | synchronize_system_messages_locale (); |
| 931 | signame = strsignal (WTERMSIG (status)); |
| 932 | |
| 933 | if (signame == 0) |
| 934 | signame = "unknown"; |
| 935 | |
| 936 | return code_convert_string_norecord (build_string (signame), |
| 937 | Vlocale_coding_system, 0); |
| 938 | } |
| 939 | |
| 940 | eassert (WIFEXITED (status)); |
| 941 | return make_number (WEXITSTATUS (status)); |
| 942 | } |
| 943 | \f |
| 944 | /* Create a temporary file suitable for storing the input data of |
| 945 | call-process-region. NARGS and ARGS are the same as for |
| 946 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
| 947 | naming the file, and return a file descriptor for reading. |
| 948 | Unwind-protect the file, so that the file descriptor will be closed |
| 949 | and the file removed when the caller unwinds the specpdl stack. */ |
| 950 | |
| 951 | static int |
| 952 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, |
| 953 | Lisp_Object *filename_string_ptr) |
| 954 | { |
| 955 | int fd; |
| 956 | struct gcpro gcpro1; |
| 957 | Lisp_Object filename_string; |
| 958 | Lisp_Object val, start, end; |
| 959 | Lisp_Object tmpdir; |
| 960 | |
| 961 | if (STRINGP (Vtemporary_file_directory)) |
| 962 | tmpdir = Vtemporary_file_directory; |
| 963 | else |
| 964 | { |
| 965 | char *outf; |
| 966 | #ifndef DOS_NT |
| 967 | outf = getenv ("TMPDIR"); |
| 968 | tmpdir = build_string (outf ? outf : "/tmp/"); |
| 969 | #else /* DOS_NT */ |
| 970 | if ((outf = egetenv ("TMPDIR")) |
| 971 | || (outf = egetenv ("TMP")) |
| 972 | || (outf = egetenv ("TEMP"))) |
| 973 | tmpdir = build_string (outf); |
| 974 | else |
| 975 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); |
| 976 | #endif |
| 977 | } |
| 978 | |
| 979 | { |
| 980 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
| 981 | char *tempfile; |
| 982 | ptrdiff_t count; |
| 983 | |
| 984 | #ifdef WINDOWSNT |
| 985 | /* Cannot use the result of Fexpand_file_name, because it |
| 986 | downcases the XXXXXX part of the pattern, and mktemp then |
| 987 | doesn't recognize it. */ |
| 988 | if (!NILP (Vw32_downcase_file_names)) |
| 989 | { |
| 990 | Lisp_Object dirname = Ffile_name_directory (pattern); |
| 991 | |
| 992 | if (NILP (dirname)) |
| 993 | pattern = Vtemp_file_name_pattern; |
| 994 | else |
| 995 | pattern = concat2 (dirname, Vtemp_file_name_pattern); |
| 996 | } |
| 997 | #endif |
| 998 | |
| 999 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
| 1000 | GCPRO1 (filename_string); |
| 1001 | tempfile = SSDATA (filename_string); |
| 1002 | |
| 1003 | count = SPECPDL_INDEX (); |
| 1004 | record_unwind_protect_nothing (); |
| 1005 | fd = mkostemp (tempfile, O_CLOEXEC); |
| 1006 | if (fd < 0) |
| 1007 | report_file_error ("Failed to open temporary file using pattern", |
| 1008 | pattern); |
| 1009 | set_unwind_protect (count, delete_temp_file, filename_string); |
| 1010 | record_unwind_protect_int (close_file_unwind, fd); |
| 1011 | } |
| 1012 | |
| 1013 | start = args[0]; |
| 1014 | end = args[1]; |
| 1015 | /* Decide coding-system of the contents of the temporary file. */ |
| 1016 | if (!NILP (Vcoding_system_for_write)) |
| 1017 | val = Vcoding_system_for_write; |
| 1018 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 1019 | val = Qraw_text; |
| 1020 | else |
| 1021 | { |
| 1022 | Lisp_Object coding_systems; |
| 1023 | Lisp_Object *args2; |
| 1024 | USE_SAFE_ALLOCA; |
| 1025 | SAFE_NALLOCA (args2, 1, nargs + 1); |
| 1026 | args2[0] = Qcall_process_region; |
| 1027 | memcpy (args2 + 1, args, nargs * sizeof *args); |
| 1028 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
| 1029 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
| 1030 | SAFE_FREE (); |
| 1031 | } |
| 1032 | val = complement_process_encoding_system (val); |
| 1033 | |
| 1034 | { |
| 1035 | ptrdiff_t count1 = SPECPDL_INDEX (); |
| 1036 | |
| 1037 | specbind (intern ("coding-system-for-write"), val); |
| 1038 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
| 1039 | happen to get a ".Z" suffix. */ |
| 1040 | specbind (intern ("file-name-handler-alist"), Qnil); |
| 1041 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
| 1042 | |
| 1043 | unbind_to (count1, Qnil); |
| 1044 | } |
| 1045 | |
| 1046 | if (lseek (fd, 0, SEEK_SET) < 0) |
| 1047 | report_file_error ("Setting file position", filename_string); |
| 1048 | |
| 1049 | /* Note that Fcall_process takes care of binding |
| 1050 | coding-system-for-read. */ |
| 1051 | |
| 1052 | *filename_string_ptr = filename_string; |
| 1053 | UNGCPRO; |
| 1054 | return fd; |
| 1055 | } |
| 1056 | |
| 1057 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, |
| 1058 | 3, MANY, 0, |
| 1059 | doc: /* Send text from START to END to a synchronous process running PROGRAM. |
| 1060 | The remaining arguments are optional. |
| 1061 | Delete the text if fourth arg DELETE is non-nil. |
| 1062 | |
| 1063 | Insert output in BUFFER before point; t means current buffer; nil for |
| 1064 | BUFFER means discard it; 0 means discard and don't wait; and `(:file |
| 1065 | FILE)', where FILE is a file name string, means that it should be |
| 1066 | written to that file (if the file already exists it is overwritten). |
| 1067 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
| 1068 | REAL-BUFFER says what to do with standard output, as above, |
| 1069 | while STDERR-FILE says what to do with standard error in the child. |
| 1070 | STDERR-FILE may be nil (discard standard error output), |
| 1071 | t (mix it with ordinary output), or a file name string. |
| 1072 | |
| 1073 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. |
| 1074 | Remaining args are passed to PROGRAM at startup as command args. |
| 1075 | |
| 1076 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
| 1077 | Otherwise it waits for PROGRAM to terminate |
| 1078 | and returns a numeric exit status or a signal description string. |
| 1079 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
| 1080 | |
| 1081 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) |
| 1082 | (ptrdiff_t nargs, Lisp_Object *args) |
| 1083 | { |
| 1084 | struct gcpro gcpro1; |
| 1085 | Lisp_Object infile, val; |
| 1086 | ptrdiff_t count = SPECPDL_INDEX (); |
| 1087 | Lisp_Object start = args[0]; |
| 1088 | Lisp_Object end = args[1]; |
| 1089 | bool empty_input; |
| 1090 | int fd; |
| 1091 | |
| 1092 | if (STRINGP (start)) |
| 1093 | empty_input = SCHARS (start) == 0; |
| 1094 | else if (NILP (start)) |
| 1095 | empty_input = BEG == Z; |
| 1096 | else |
| 1097 | { |
| 1098 | validate_region (&args[0], &args[1]); |
| 1099 | start = args[0]; |
| 1100 | end = args[1]; |
| 1101 | empty_input = XINT (start) == XINT (end); |
| 1102 | } |
| 1103 | |
| 1104 | if (!empty_input) |
| 1105 | fd = create_temp_file (nargs, args, &infile); |
| 1106 | else |
| 1107 | { |
| 1108 | infile = Qnil; |
| 1109 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); |
| 1110 | if (fd < 0) |
| 1111 | report_file_error ("Opening null device", Qnil); |
| 1112 | record_unwind_protect_int (close_file_unwind, fd); |
| 1113 | } |
| 1114 | |
| 1115 | GCPRO1 (infile); |
| 1116 | |
| 1117 | if (nargs > 3 && !NILP (args[3])) |
| 1118 | Fdelete_region (start, end); |
| 1119 | |
| 1120 | if (nargs > 3) |
| 1121 | { |
| 1122 | args += 2; |
| 1123 | nargs -= 2; |
| 1124 | } |
| 1125 | else |
| 1126 | { |
| 1127 | args[0] = args[2]; |
| 1128 | nargs = 2; |
| 1129 | } |
| 1130 | args[1] = infile; |
| 1131 | |
| 1132 | val = call_process (nargs, args, fd, empty_input ? -1 : count); |
| 1133 | RETURN_UNGCPRO (unbind_to (count, val)); |
| 1134 | } |
| 1135 | \f |
| 1136 | #ifndef WINDOWSNT |
| 1137 | static int relocate_fd (int fd, int minfd); |
| 1138 | #endif |
| 1139 | |
| 1140 | static char ** |
| 1141 | add_env (char **env, char **new_env, char *string) |
| 1142 | { |
| 1143 | char **ep; |
| 1144 | bool ok = 1; |
| 1145 | if (string == NULL) |
| 1146 | return new_env; |
| 1147 | |
| 1148 | /* See if this string duplicates any string already in the env. |
| 1149 | If so, don't put it in. |
| 1150 | When an env var has multiple definitions, |
| 1151 | we keep the definition that comes first in process-environment. */ |
| 1152 | for (ep = env; ok && ep != new_env; ep++) |
| 1153 | { |
| 1154 | char *p = *ep, *q = string; |
| 1155 | while (ok) |
| 1156 | { |
| 1157 | if (*q != *p) |
| 1158 | break; |
| 1159 | if (*q == 0) |
| 1160 | /* The string is a lone variable name; keep it for now, we |
| 1161 | will remove it later. It is a placeholder for a |
| 1162 | variable that is not to be included in the environment. */ |
| 1163 | break; |
| 1164 | if (*q == '=') |
| 1165 | ok = 0; |
| 1166 | p++, q++; |
| 1167 | } |
| 1168 | } |
| 1169 | if (ok) |
| 1170 | *new_env++ = string; |
| 1171 | return new_env; |
| 1172 | } |
| 1173 | |
| 1174 | /* This is the last thing run in a newly forked inferior |
| 1175 | either synchronous or asynchronous. |
| 1176 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. |
| 1177 | Initialize inferior's priority, pgrp, connected dir and environment. |
| 1178 | then exec another program based on new_argv. |
| 1179 | |
| 1180 | If SET_PGRP, put the subprocess into a separate process group. |
| 1181 | |
| 1182 | CURRENT_DIR is an elisp string giving the path of the current |
| 1183 | directory the subprocess should have. Since we can't really signal |
| 1184 | a decent error from within the child, this should be verified as an |
| 1185 | executable directory by the parent. */ |
| 1186 | |
| 1187 | int |
| 1188 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
| 1189 | Lisp_Object current_dir) |
| 1190 | { |
| 1191 | char **env; |
| 1192 | char *pwd_var; |
| 1193 | #ifdef WINDOWSNT |
| 1194 | int cpid; |
| 1195 | HANDLE handles[3]; |
| 1196 | #else |
| 1197 | int exec_errno; |
| 1198 | |
| 1199 | pid_t pid = getpid (); |
| 1200 | #endif /* WINDOWSNT */ |
| 1201 | |
| 1202 | /* Note that use of alloca is always safe here. It's obvious for systems |
| 1203 | that do not have true vfork or that have true (stack) alloca. |
| 1204 | If using vfork and C_ALLOCA (when Emacs used to include |
| 1205 | src/alloca.c) it is safe because that changes the superior's |
| 1206 | static variables as if the superior had done alloca and will be |
| 1207 | cleaned up in the usual way. */ |
| 1208 | { |
| 1209 | char *temp; |
| 1210 | ptrdiff_t i; |
| 1211 | |
| 1212 | i = SBYTES (current_dir); |
| 1213 | #ifdef MSDOS |
| 1214 | /* MSDOS must have all environment variables malloc'ed, because |
| 1215 | low-level libc functions that launch subsidiary processes rely |
| 1216 | on that. */ |
| 1217 | pwd_var = xmalloc (i + 5); |
| 1218 | #else |
| 1219 | pwd_var = alloca (i + 5); |
| 1220 | #endif |
| 1221 | temp = pwd_var + 4; |
| 1222 | memcpy (pwd_var, "PWD=", 4); |
| 1223 | strcpy (temp, SSDATA (current_dir)); |
| 1224 | |
| 1225 | #ifndef DOS_NT |
| 1226 | /* We can't signal an Elisp error here; we're in a vfork. Since |
| 1227 | the callers check the current directory before forking, this |
| 1228 | should only return an error if the directory's permissions |
| 1229 | are changed between the check and this chdir, but we should |
| 1230 | at least check. */ |
| 1231 | if (chdir (temp) < 0) |
| 1232 | _exit (EXIT_CANCELED); |
| 1233 | #else /* DOS_NT */ |
| 1234 | /* Get past the drive letter, so that d:/ is left alone. */ |
| 1235 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) |
| 1236 | { |
| 1237 | temp += 2; |
| 1238 | i -= 2; |
| 1239 | } |
| 1240 | #endif /* DOS_NT */ |
| 1241 | |
| 1242 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
| 1243 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
| 1244 | temp[--i] = 0; |
| 1245 | } |
| 1246 | |
| 1247 | /* Set `env' to a vector of the strings in the environment. */ |
| 1248 | { |
| 1249 | register Lisp_Object tem; |
| 1250 | register char **new_env; |
| 1251 | char **p, **q; |
| 1252 | register int new_length; |
| 1253 | Lisp_Object display = Qnil; |
| 1254 | |
| 1255 | new_length = 0; |
| 1256 | |
| 1257 | for (tem = Vprocess_environment; |
| 1258 | CONSP (tem) && STRINGP (XCAR (tem)); |
| 1259 | tem = XCDR (tem)) |
| 1260 | { |
| 1261 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
| 1262 | && (SDATA (XCAR (tem)) [7] == '\0' |
| 1263 | || SDATA (XCAR (tem)) [7] == '=')) |
| 1264 | /* DISPLAY is specified in process-environment. */ |
| 1265 | display = Qt; |
| 1266 | new_length++; |
| 1267 | } |
| 1268 | |
| 1269 | /* If not provided yet, use the frame's DISPLAY. */ |
| 1270 | if (NILP (display)) |
| 1271 | { |
| 1272 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); |
| 1273 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) |
| 1274 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
| 1275 | tmp = Fgetenv_internal (build_string ("DISPLAY"), |
| 1276 | Vinitial_environment); |
| 1277 | if (STRINGP (tmp)) |
| 1278 | { |
| 1279 | display = tmp; |
| 1280 | new_length++; |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | /* new_length + 2 to include PWD and terminating 0. */ |
| 1285 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
| 1286 | /* If we have a PWD envvar, pass one down, |
| 1287 | but with corrected value. */ |
| 1288 | if (egetenv ("PWD")) |
| 1289 | *new_env++ = pwd_var; |
| 1290 | |
| 1291 | if (STRINGP (display)) |
| 1292 | { |
| 1293 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
| 1294 | strcpy (vdata, "DISPLAY="); |
| 1295 | strcat (vdata, SSDATA (display)); |
| 1296 | new_env = add_env (env, new_env, vdata); |
| 1297 | } |
| 1298 | |
| 1299 | /* Overrides. */ |
| 1300 | for (tem = Vprocess_environment; |
| 1301 | CONSP (tem) && STRINGP (XCAR (tem)); |
| 1302 | tem = XCDR (tem)) |
| 1303 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
| 1304 | |
| 1305 | *new_env = 0; |
| 1306 | |
| 1307 | /* Remove variable names without values. */ |
| 1308 | p = q = env; |
| 1309 | while (*p != 0) |
| 1310 | { |
| 1311 | while (*q != 0 && strchr (*q, '=') == NULL) |
| 1312 | q++; |
| 1313 | *p = *q++; |
| 1314 | if (*p != 0) |
| 1315 | p++; |
| 1316 | } |
| 1317 | } |
| 1318 | |
| 1319 | |
| 1320 | #ifdef WINDOWSNT |
| 1321 | prepare_standard_handles (in, out, err, handles); |
| 1322 | set_process_dir (SDATA (current_dir)); |
| 1323 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
| 1324 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
| 1325 | reset_standard_handles (in, out, err, handles); |
| 1326 | if (cpid == -1) |
| 1327 | /* An error occurred while trying to spawn the process. */ |
| 1328 | report_file_error ("Spawning child process", Qnil); |
| 1329 | return cpid; |
| 1330 | |
| 1331 | #else /* not WINDOWSNT */ |
| 1332 | /* Make sure that in, out, and err are not actually already in |
| 1333 | descriptors zero, one, or two; this could happen if Emacs is |
| 1334 | started with its standard in, out, or error closed, as might |
| 1335 | happen under X. */ |
| 1336 | { |
| 1337 | int oin = in, oout = out; |
| 1338 | |
| 1339 | /* We have to avoid relocating the same descriptor twice! */ |
| 1340 | |
| 1341 | in = relocate_fd (in, 3); |
| 1342 | |
| 1343 | if (out == oin) |
| 1344 | out = in; |
| 1345 | else |
| 1346 | out = relocate_fd (out, 3); |
| 1347 | |
| 1348 | if (err == oin) |
| 1349 | err = in; |
| 1350 | else if (err == oout) |
| 1351 | err = out; |
| 1352 | else |
| 1353 | err = relocate_fd (err, 3); |
| 1354 | } |
| 1355 | |
| 1356 | #ifndef MSDOS |
| 1357 | /* Redirect file descriptors and clear the close-on-exec flag on the |
| 1358 | redirected ones. IN, OUT, and ERR are close-on-exec so they |
| 1359 | need not be closed explicitly. */ |
| 1360 | dup2 (in, 0); |
| 1361 | dup2 (out, 1); |
| 1362 | dup2 (err, 2); |
| 1363 | |
| 1364 | setpgid (0, 0); |
| 1365 | tcsetpgrp (0, pid); |
| 1366 | |
| 1367 | execve (new_argv[0], new_argv, env); |
| 1368 | exec_errno = errno; |
| 1369 | |
| 1370 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
| 1371 | pipe's reader is the parent, but with vfork the parent can't |
| 1372 | run until the child exits. Truncate the diagnostic instead. */ |
| 1373 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); |
| 1374 | |
| 1375 | errno = exec_errno; |
| 1376 | emacs_perror (new_argv[0]); |
| 1377 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); |
| 1378 | |
| 1379 | #else /* MSDOS */ |
| 1380 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); |
| 1381 | xfree (pwd_var); |
| 1382 | if (pid == -1) |
| 1383 | /* An error occurred while trying to run the subprocess. */ |
| 1384 | report_file_error ("Spawning child process", Qnil); |
| 1385 | return pid; |
| 1386 | #endif /* MSDOS */ |
| 1387 | #endif /* not WINDOWSNT */ |
| 1388 | } |
| 1389 | |
| 1390 | #ifndef WINDOWSNT |
| 1391 | /* Move the file descriptor FD so that its number is not less than MINFD. |
| 1392 | If the file descriptor is moved at all, the original is closed on MSDOS, |
| 1393 | but not elsewhere as the caller will close it anyway. */ |
| 1394 | static int |
| 1395 | relocate_fd (int fd, int minfd) |
| 1396 | { |
| 1397 | if (fd >= minfd) |
| 1398 | return fd; |
| 1399 | else |
| 1400 | { |
| 1401 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
| 1402 | if (new == -1) |
| 1403 | { |
| 1404 | emacs_perror ("while setting up child"); |
| 1405 | _exit (EXIT_CANCELED); |
| 1406 | } |
| 1407 | #ifdef MSDOS |
| 1408 | emacs_close (fd); |
| 1409 | #endif |
| 1410 | return new; |
| 1411 | } |
| 1412 | } |
| 1413 | #endif /* not WINDOWSNT */ |
| 1414 | |
| 1415 | static bool |
| 1416 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
| 1417 | ptrdiff_t *valuelen, Lisp_Object env) |
| 1418 | { |
| 1419 | for (; CONSP (env); env = XCDR (env)) |
| 1420 | { |
| 1421 | Lisp_Object entry = XCAR (env); |
| 1422 | if (STRINGP (entry) |
| 1423 | && SBYTES (entry) >= varlen |
| 1424 | #ifdef WINDOWSNT |
| 1425 | /* NT environment variables are case insensitive. */ |
| 1426 | && ! strnicmp (SDATA (entry), var, varlen) |
| 1427 | #else /* not WINDOWSNT */ |
| 1428 | && ! memcmp (SDATA (entry), var, varlen) |
| 1429 | #endif /* not WINDOWSNT */ |
| 1430 | ) |
| 1431 | { |
| 1432 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
| 1433 | { |
| 1434 | *value = SSDATA (entry) + (varlen + 1); |
| 1435 | *valuelen = SBYTES (entry) - (varlen + 1); |
| 1436 | return 1; |
| 1437 | } |
| 1438 | else if (SBYTES (entry) == varlen) |
| 1439 | { |
| 1440 | /* Lone variable names in Vprocess_environment mean that |
| 1441 | variable should be removed from the environment. */ |
| 1442 | *value = NULL; |
| 1443 | return 1; |
| 1444 | } |
| 1445 | } |
| 1446 | } |
| 1447 | return 0; |
| 1448 | } |
| 1449 | |
| 1450 | static bool |
| 1451 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
| 1452 | ptrdiff_t *valuelen, Lisp_Object frame) |
| 1453 | { |
| 1454 | /* Try to find VAR in Vprocess_environment first. */ |
| 1455 | if (getenv_internal_1 (var, varlen, value, valuelen, |
| 1456 | Vprocess_environment)) |
| 1457 | return *value ? 1 : 0; |
| 1458 | |
| 1459 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
| 1460 | if (strcmp (var, "DISPLAY") == 0) |
| 1461 | { |
| 1462 | Lisp_Object display |
| 1463 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); |
| 1464 | if (STRINGP (display)) |
| 1465 | { |
| 1466 | *value = SSDATA (display); |
| 1467 | *valuelen = SBYTES (display); |
| 1468 | return 1; |
| 1469 | } |
| 1470 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
| 1471 | if (getenv_internal_1 (var, varlen, value, valuelen, |
| 1472 | Vinitial_environment)) |
| 1473 | return *value ? 1 : 0; |
| 1474 | } |
| 1475 | |
| 1476 | return 0; |
| 1477 | } |
| 1478 | |
| 1479 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
| 1480 | doc: /* Get the value of environment variable VARIABLE. |
| 1481 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in |
| 1482 | the environment. Otherwise, value is a string. |
| 1483 | |
| 1484 | This function searches `process-environment' for VARIABLE. |
| 1485 | |
| 1486 | If optional parameter ENV is a list, then search this list instead of |
| 1487 | `process-environment', and return t when encountering a negative entry |
| 1488 | \(an entry for a variable with no value). */) |
| 1489 | (Lisp_Object variable, Lisp_Object env) |
| 1490 | { |
| 1491 | char *value; |
| 1492 | ptrdiff_t valuelen; |
| 1493 | |
| 1494 | CHECK_STRING (variable); |
| 1495 | if (CONSP (env)) |
| 1496 | { |
| 1497 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
| 1498 | &value, &valuelen, env)) |
| 1499 | return value ? make_string (value, valuelen) : Qt; |
| 1500 | else |
| 1501 | return Qnil; |
| 1502 | } |
| 1503 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
| 1504 | &value, &valuelen, env)) |
| 1505 | return make_string (value, valuelen); |
| 1506 | else |
| 1507 | return Qnil; |
| 1508 | } |
| 1509 | |
| 1510 | /* A version of getenv that consults the Lisp environment lists, |
| 1511 | easily callable from C. */ |
| 1512 | char * |
| 1513 | egetenv (const char *var) |
| 1514 | { |
| 1515 | char *value; |
| 1516 | ptrdiff_t valuelen; |
| 1517 | |
| 1518 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
| 1519 | return value; |
| 1520 | else |
| 1521 | return 0; |
| 1522 | } |
| 1523 | |
| 1524 | \f |
| 1525 | /* This is run before init_cmdargs. */ |
| 1526 | |
| 1527 | void |
| 1528 | init_callproc_1 (void) |
| 1529 | { |
| 1530 | #ifdef HAVE_NS |
| 1531 | const char *etc_dir = ns_etc_directory (); |
| 1532 | const char *path_exec = ns_exec_path (); |
| 1533 | #endif |
| 1534 | |
| 1535 | Vdata_directory = decode_env_path ("EMACSDATA", |
| 1536 | #ifdef HAVE_NS |
| 1537 | etc_dir ? etc_dir : |
| 1538 | #endif |
| 1539 | PATH_DATA, 0); |
| 1540 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); |
| 1541 | |
| 1542 | Vdoc_directory = decode_env_path ("EMACSDOC", |
| 1543 | #ifdef HAVE_NS |
| 1544 | etc_dir ? etc_dir : |
| 1545 | #endif |
| 1546 | PATH_DOC, 0); |
| 1547 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); |
| 1548 | |
| 1549 | /* Check the EMACSPATH environment variable, defaulting to the |
| 1550 | PATH_EXEC path from epaths.h. */ |
| 1551 | Vexec_path = decode_env_path ("EMACSPATH", |
| 1552 | #ifdef HAVE_NS |
| 1553 | path_exec ? path_exec : |
| 1554 | #endif |
| 1555 | PATH_EXEC, 0); |
| 1556 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
| 1557 | /* FIXME? For ns, path_exec should go at the front? */ |
| 1558 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
| 1559 | } |
| 1560 | |
| 1561 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
| 1562 | |
| 1563 | void |
| 1564 | init_callproc (void) |
| 1565 | { |
| 1566 | char *data_dir = egetenv ("EMACSDATA"); |
| 1567 | |
| 1568 | register char * sh; |
| 1569 | Lisp_Object tempdir; |
| 1570 | #ifdef HAVE_NS |
| 1571 | if (data_dir == 0) |
| 1572 | { |
| 1573 | const char *etc_dir = ns_etc_directory (); |
| 1574 | if (etc_dir) |
| 1575 | { |
| 1576 | data_dir = alloca (strlen (etc_dir) + 1); |
| 1577 | strcpy (data_dir, etc_dir); |
| 1578 | } |
| 1579 | } |
| 1580 | #endif |
| 1581 | |
| 1582 | if (!NILP (Vinstallation_directory)) |
| 1583 | { |
| 1584 | /* Add to the path the lib-src subdir of the installation dir. */ |
| 1585 | Lisp_Object tem; |
| 1586 | tem = Fexpand_file_name (build_string ("lib-src"), |
| 1587 | Vinstallation_directory); |
| 1588 | #ifndef MSDOS |
| 1589 | /* MSDOS uses wrapped binaries, so don't do this. */ |
| 1590 | if (NILP (Fmember (tem, Vexec_path))) |
| 1591 | { |
| 1592 | #ifdef HAVE_NS |
| 1593 | const char *path_exec = ns_exec_path (); |
| 1594 | #endif |
| 1595 | Vexec_path = decode_env_path ("EMACSPATH", |
| 1596 | #ifdef HAVE_NS |
| 1597 | path_exec ? path_exec : |
| 1598 | #endif |
| 1599 | PATH_EXEC, 0); |
| 1600 | Vexec_path = Fcons (tem, Vexec_path); |
| 1601 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
| 1602 | } |
| 1603 | |
| 1604 | Vexec_directory = Ffile_name_as_directory (tem); |
| 1605 | #endif /* not MSDOS */ |
| 1606 | |
| 1607 | /* Maybe use ../etc as well as ../lib-src. */ |
| 1608 | if (data_dir == 0) |
| 1609 | { |
| 1610 | tem = Fexpand_file_name (build_string ("etc"), |
| 1611 | Vinstallation_directory); |
| 1612 | Vdoc_directory = Ffile_name_as_directory (tem); |
| 1613 | } |
| 1614 | } |
| 1615 | |
| 1616 | /* Look for the files that should be in etc. We don't use |
| 1617 | Vinstallation_directory, because these files are never installed |
| 1618 | near the executable, and they are never in the build |
| 1619 | directory when that's different from the source directory. |
| 1620 | |
| 1621 | Instead, if these files are not in the nominal place, we try the |
| 1622 | source directory. */ |
| 1623 | if (data_dir == 0) |
| 1624 | { |
| 1625 | Lisp_Object tem, tem1, srcdir; |
| 1626 | Lisp_Object lispdir = Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH, 0)); |
| 1627 | |
| 1628 | srcdir = Fexpand_file_name (build_string ("../src/"), lispdir); |
| 1629 | |
| 1630 | tem = Fexpand_file_name (build_string ("NEWS"), Vdata_directory); |
| 1631 | tem1 = Ffile_exists_p (tem); |
| 1632 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
| 1633 | { |
| 1634 | Lisp_Object newdir; |
| 1635 | newdir = Fexpand_file_name (build_string ("../etc/"), lispdir); |
| 1636 | tem = Fexpand_file_name (build_string ("NEWS"), newdir); |
| 1637 | tem1 = Ffile_exists_p (tem); |
| 1638 | if (!NILP (tem1)) |
| 1639 | Vdata_directory = newdir; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | #ifndef CANNOT_DUMP |
| 1644 | if (initialized) |
| 1645 | #endif |
| 1646 | { |
| 1647 | tempdir = Fdirectory_file_name (Vexec_directory); |
| 1648 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
| 1649 | dir_warning ("arch-dependent data dir", Vexec_directory); |
| 1650 | } |
| 1651 | |
| 1652 | tempdir = Fdirectory_file_name (Vdata_directory); |
| 1653 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
| 1654 | dir_warning ("arch-independent data dir", Vdata_directory); |
| 1655 | |
| 1656 | sh = getenv ("SHELL"); |
| 1657 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
| 1658 | |
| 1659 | #ifdef DOS_NT |
| 1660 | Vshared_game_score_directory = Qnil; |
| 1661 | #else |
| 1662 | Vshared_game_score_directory = build_unibyte_string (PATH_GAME); |
| 1663 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
| 1664 | Vshared_game_score_directory = Qnil; |
| 1665 | #endif |
| 1666 | } |
| 1667 | |
| 1668 | void |
| 1669 | set_initial_environment (void) |
| 1670 | { |
| 1671 | char **envp; |
| 1672 | for (envp = environ; *envp; envp++) |
| 1673 | Vprocess_environment = Fcons (build_string (*envp), |
| 1674 | Vprocess_environment); |
| 1675 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent |
| 1676 | to use `delete' and friends on process-environment. */ |
| 1677 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); |
| 1678 | } |
| 1679 | |
| 1680 | void |
| 1681 | syms_of_callproc (void) |
| 1682 | { |
| 1683 | #ifndef DOS_NT |
| 1684 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); |
| 1685 | #else /* DOS_NT */ |
| 1686 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); |
| 1687 | #endif |
| 1688 | staticpro (&Vtemp_file_name_pattern); |
| 1689 | |
| 1690 | #ifdef MSDOS |
| 1691 | synch_process_tempfile = make_number (0); |
| 1692 | staticpro (&synch_process_tempfile); |
| 1693 | #endif |
| 1694 | |
| 1695 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
| 1696 | doc: /* File name to load inferior shells from. |
| 1697 | Initialized from the SHELL environment variable, or to a system-dependent |
| 1698 | default if SHELL is not set. */); |
| 1699 | |
| 1700 | DEFVAR_LISP ("exec-path", Vexec_path, |
| 1701 | doc: /* List of directories to search programs to run in subprocesses. |
| 1702 | Each element is a string (directory name) or nil (try default directory). |
| 1703 | |
| 1704 | By default the last element of this list is `exec-directory'. The |
| 1705 | last element is not always used, for example in shell completion |
| 1706 | (`shell-dynamic-complete-command'). */); |
| 1707 | |
| 1708 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
| 1709 | doc: /* List of suffixes to try to find executable file names. |
| 1710 | Each element is a string. */); |
| 1711 | Vexec_suffixes = Qnil; |
| 1712 | |
| 1713 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
| 1714 | doc: /* Directory for executables for Emacs to invoke. |
| 1715 | More generally, this includes any architecture-dependent files |
| 1716 | that are built and installed from the Emacs distribution. */); |
| 1717 | |
| 1718 | DEFVAR_LISP ("data-directory", Vdata_directory, |
| 1719 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
| 1720 | These are files intended for Emacs to use while it runs. */); |
| 1721 | |
| 1722 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
| 1723 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
| 1724 | This is usually the same as `data-directory'. */); |
| 1725 | |
| 1726 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
| 1727 | doc: /* For internal use by the build procedure only. |
| 1728 | This is the name of the directory in which the build procedure installed |
| 1729 | Emacs's info files; the default value for `Info-default-directory-list' |
| 1730 | includes this. */); |
| 1731 | Vconfigure_info_directory = build_string (PATH_INFO); |
| 1732 | |
| 1733 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
| 1734 | doc: /* Directory of score files for games which come with GNU Emacs. |
| 1735 | If this variable is nil, then Emacs is unable to use a shared directory. */); |
| 1736 | #ifdef DOS_NT |
| 1737 | Vshared_game_score_directory = Qnil; |
| 1738 | #else |
| 1739 | Vshared_game_score_directory = build_string (PATH_GAME); |
| 1740 | #endif |
| 1741 | |
| 1742 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
| 1743 | doc: /* List of environment variables inherited from the parent process. |
| 1744 | Each element should be a string of the form ENVVARNAME=VALUE. |
| 1745 | The elements must normally be decoded (using `locale-coding-system') for use. */); |
| 1746 | Vinitial_environment = Qnil; |
| 1747 | |
| 1748 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
| 1749 | doc: /* List of overridden environment variables for subprocesses to inherit. |
| 1750 | Each element should be a string of the form ENVVARNAME=VALUE. |
| 1751 | |
| 1752 | Entries in this list take precedence to those in the frame-local |
| 1753 | environments. Therefore, let-binding `process-environment' is an easy |
| 1754 | way to temporarily change the value of an environment variable, |
| 1755 | irrespective of where it comes from. To use `process-environment' to |
| 1756 | remove an environment variable, include only its name in the list, |
| 1757 | without "=VALUE". |
| 1758 | |
| 1759 | This variable is set to nil when Emacs starts. |
| 1760 | |
| 1761 | If multiple entries define the same variable, the first one always |
| 1762 | takes precedence. |
| 1763 | |
| 1764 | Non-ASCII characters are encoded according to the initial value of |
| 1765 | `locale-coding-system', i.e. the elements must normally be decoded for |
| 1766 | use. |
| 1767 | |
| 1768 | See `setenv' and `getenv'. */); |
| 1769 | Vprocess_environment = Qnil; |
| 1770 | |
| 1771 | defsubr (&Scall_process); |
| 1772 | defsubr (&Sgetenv_internal); |
| 1773 | defsubr (&Scall_process_region); |
| 1774 | } |