1 /* Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2, or (at your option)
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this software; see the file COPYING. If not, write to
14 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
15 * Boston, MA 02111-1307 USA
17 * As a special exception, the Free Software Foundation gives permission
18 * for additional uses of the text contained in its release of GUILE.
20 * The exception is that, if you link the GUILE library with other files
21 * to produce an executable, this does not by itself cause the
22 * resulting executable to be covered by the GNU General Public License.
23 * Your use of that executable is in no way restricted on account of
24 * linking the GUILE library code into it.
26 * This exception does not however invalidate any other reasons why
27 * the executable file might be covered by the GNU General Public License.
29 * This exception applies only to the code released by the
30 * Free Software Foundation under the name GUILE. If you copy
31 * code from other Free Software Foundation releases into a copy of
32 * GUILE, as the General Public License permits, the exception does
33 * not apply to the code that you add in this way. To avoid misleading
34 * anyone as to the status of such modified files, you must delete
35 * this exception notice from them.
37 * If you write modifications of your own for GUILE, it is your choice
38 * whether to permit this exception to apply to your modifications.
39 * If you do not wish that, delete this exception notice. */
41 /* "script.c" argv tricks for `#!' scripts.
42 Authors: Aubrey Jaffer and Jim Blandy */
44 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
45 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
51 #include "libguile/_scm.h"
52 #include "libguile/gh.h"
53 #include "libguile/load.h"
54 #include "libguile/version.h"
56 #include "libguile/validate.h"
57 #include "libguile/script.h"
64 #include <unistd.h> /* for X_OK define */
67 /* Concatentate str2 onto str1 at position n and return concatenated
68 string if file exists; 0 otherwise. */
71 scm_cat_path (char *str1
, const char *str2
, long n
)
77 long len
= strlen (str1
);
78 str1
= (char *) realloc (str1
, (scm_sizet
) (len
+ n
+ 1));
81 strncat (str1
+ len
, str2
, n
);
84 str1
= (char *) malloc ((scm_sizet
) (n
+ 1));
88 strncat (str1
, str2
, n
);
94 scm_try_path (char *path
)
97 /* fprintf(stderr, "Trying %s\n", path);fflush(stderr); */
100 SCM_SYSCALL (f
= fopen (path
, "r");
112 scm_sep_init_try (char *path
, const char *sep
, const char *initname
)
115 path
= scm_cat_path (path
, sep
, 0L);
117 path
= scm_cat_path (path
, initname
, 0L);
118 return scm_try_path (path
);
122 #ifndef LINE_INCREMENTORS
123 #define LINE_INCREMENTORS '\n'
125 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f':case 26
127 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f'
128 #endif /* def MSDOS */
129 #endif /* ndef LINE_INCREMENTORS */
132 #define MAXPATHLEN 80
133 #endif /* ndef MAXPATHLEN */
136 #endif /* ndef X_OK */
139 scm_find_executable (const char *name
)
141 char tbuf
[MAXPATHLEN
];
145 /* fprintf(stderr, "s_f_e checking access %s ->%d\n", name, access(name, X_OK)); fflush(stderr); */
146 if (access (name
, X_OK
))
148 f
= fopen (name
, "r");
151 if ((fgetc (f
) == '#') && (fgetc (f
) == '!'))
154 switch (tbuf
[i
++] = fgetc (f
))
156 case /*WHITE_SPACES */ ' ':
163 return scm_cat_path (0L, tbuf
, 0L);
167 return scm_cat_path (0L, name
, 0L);
171 /* Read a \nnn-style escape. We've just read the backslash. */
173 script_get_octal (FILE *f
)
174 #define FUNC_NAME "script_get_octal"
179 for (i
= 0; i
< 3; i
++)
182 if ('0' <= c
&& c
<= '7')
183 value
= (value
* 8) + (c
- '0');
185 SCM_MISC_ERROR ("malformed script: bad octal backslash escape",
194 script_get_backslash (FILE *f
)
195 #define FUNC_NAME "script_get_backslash"
201 case 'a': return '\a';
202 case 'b': return '\b';
203 case 'f': return '\f';
204 case 'n': return '\n';
205 case 'r': return '\r';
206 case 't': return '\t';
207 case 'v': return '\v';
215 case '0': case '1': case '2': case '3':
216 case '4': case '5': case '6': case '7':
218 return script_get_octal (f
);
221 SCM_MISC_ERROR ("malformed script: backslash followed by EOF", SCM_EOL
);
222 return 0; /* not reached? */
225 SCM_MISC_ERROR ("malformed script: bad backslash sequence", SCM_EOL
);
226 return 0; /* not reached? */
233 script_read_arg (FILE *f
)
234 #define FUNC_NAME "script_read_arg"
237 char *buf
= malloc (size
+ 1);
249 c
= script_get_backslash (f
);
250 /* The above produces a new character to add to the argument.
255 size
= (size
+ 1) * 2;
256 buf
= realloc (buf
, size
);
264 /* This may terminate an arg now, but it will terminate the
265 entire list next time through. */
273 /* Otherwise, those characters terminate the argument; fall
281 SCM_MISC_ERROR ("malformed script: TAB in meta-arguments", SCM_EOL
);
282 return 0; /* not reached? */
290 script_meta_arg_P (char *arg
)
310 scm_get_meta_args (int argc
, char **argv
)
312 int nargc
= argc
, argi
= 1, nargi
= 1;
314 if (!(argc
> 2 && script_meta_arg_P (argv
[1])))
316 if (!(nargv
= (char **) malloc ((1 + nargc
) * sizeof (char *))))
319 while (((argi
+ 1) < argc
) && (script_meta_arg_P (argv
[argi
])))
321 FILE *f
= fopen (argv
[++argi
], "r");
324 nargc
--; /* to compensate for replacement of '\\' */
336 while ((narg
= script_read_arg (f
)))
337 if (!(nargv
= (char **) realloc (nargv
,
338 (1 + ++nargc
) * sizeof (char *))))
341 nargv
[nargi
++] = narg
;
343 nargv
[nargi
++] = argv
[argi
++];
347 nargv
[nargi
++] = argv
[argi
++];
352 scm_count_argv (char **argv
)
361 /* For use in error messages. */
362 char *scm_usage_name
= 0;
365 scm_shell_usage (int fatal
, char *message
)
368 fprintf (stderr
, "%s\n", message
);
371 "Usage: %s OPTION ...\n"
372 "Evaluate Scheme code, interactively or from a script.\n"
374 " -s SCRIPT load Scheme source code from FILE, and exit\n"
375 " -c EXPR evalute Scheme expression EXPR, and exit\n"
376 " -- stop scanning arguments; run interactively\n"
377 "The above switches stop argument processing, and pass all\n"
378 "remaining arguments as the value of (command-line).\n"
380 " -l FILE load Scheme source code from FILE\n"
381 " -e FUNCTION after reading script, apply FUNCTION to\n"
382 " command line arguments\n"
383 " -ds do -s script at this point\n"
384 " --debug start with debugging evaluator and backtraces\n"
385 " -q inhibit loading of user init file\n"
386 " --emacs enable Emacs protocol (experimental)\n"
387 " -h, --help display this help and exit\n"
388 " -v, --version display version information and exit\n"
389 " \\ read arguments from following script lines\n",
397 /* Some symbols used by the command-line compiler. */
398 SCM_SYMBOL (sym_load
, "load");
399 SCM_SYMBOL (sym_eval_string
, "eval-string");
400 SCM_SYMBOL (sym_command_line
, "command-line");
401 SCM_SYMBOL (sym_begin
, "begin");
402 SCM_SYMBOL (sym_load_user_init
, "load-user-init");
403 SCM_SYMBOL (sym_top_repl
, "top-repl");
404 SCM_SYMBOL (sym_quit
, "quit");
407 /* Given an array of command-line switches, return a Scheme expression
408 to carry out the actions specified by the switches.
410 If you told me this should have been written in Scheme, I'd
411 probably agree. I'd say I didn't feel comfortable doing that in
412 the present system. You'd say, well, fix the system so you are
413 comfortable doing that. I'd agree again. *shrug*
415 We load the ice-9 system from here. It might be nicer if the
416 libraries initialized from the inner_main function in guile.c (which
417 will be auto-generated eventually) could assume ice-9 were already
418 loaded. Then again, it might be nice if ice-9 could assume that
419 certain libraries were already loaded. The solution is to break up
420 ice-9 into modules which can be frozen and statically linked like any
421 other module. Then all the modules can describe their dependencies in
422 the usual way, and the auto-generated inner_main will do the right
425 static char guile
[] = "guile";
428 scm_compile_shell_switches (int argc
, char **argv
)
430 SCM tail
= SCM_EOL
; /* We accumulate the list backwards,
431 and then reverse! it before we
433 SCM do_script
= SCM_EOL
; /* The element of the list containing
434 the "load" command, in case we get
436 SCM entry_point
= SCM_EOL
; /* for -e switch */
437 int interactive
= 1; /* Should we go interactive when done? */
438 int inhibit_user_init
= 0; /* Don't load user init file */
439 int use_emacs_interface
= 0;
446 scm_usage_name
= strrchr (argv
[0], '/');
447 if (! scm_usage_name
)
448 scm_usage_name
= argv
[0];
452 if (! scm_usage_name
)
453 scm_usage_name
= guile
;
455 for (i
= 1; i
< argc
; i
++)
457 if (! strcmp (argv
[i
], "-s")) /* load script */
460 scm_shell_usage (1, "missing argument to `-s' switch");
462 /* If we specified the -ds option, do_script points to the
463 cdr of an expression like (load #f); we replace the car
464 (i.e., the #f) with the script name. */
465 if (!SCM_NULLP (do_script
))
467 SCM_SETCAR (do_script
, scm_makfrom0str (argv
[i
]));
471 /* Construct an application of LOAD to the script name. */
472 tail
= scm_cons (scm_cons2 (sym_load
,
473 scm_makfrom0str (argv
[i
]),
482 else if (! strcmp (argv
[i
], "-c")) /* evaluate expr */
485 scm_shell_usage (1, "missing argument to `-c' switch");
486 tail
= scm_cons (scm_cons2 (sym_eval_string
,
487 scm_makfrom0str (argv
[i
]),
495 else if (! strcmp (argv
[i
], "--")) /* end args; go interactive */
501 else if (! strcmp (argv
[i
], "-l")) /* load a file */
504 tail
= scm_cons (scm_cons2 (sym_load
,
505 scm_makfrom0str (argv
[i
]),
509 scm_shell_usage (1, "missing argument to `-l' switch");
512 else if (! strcmp (argv
[i
], "-e")) /* entry point */
515 entry_point
= gh_symbol2scm (argv
[i
]);
517 scm_shell_usage (1, "missing argument to `-e' switch");
520 else if (! strcmp (argv
[i
], "-ds")) /* do script here */
522 /* We put a dummy "load" expression, and let the -s put the
524 if (!SCM_NULLP (do_script
))
525 scm_shell_usage (1, "the -ds switch may only be specified once");
526 do_script
= scm_cons (SCM_BOOL_F
, SCM_EOL
);
527 tail
= scm_cons (scm_cons (sym_load
, do_script
),
531 else if (! strcmp (argv
[i
], "--debug")) /* debug eval + backtraces */
535 SCM_RECORD_POSITIONS_P
= 1;
536 SCM_RESET_DEBUG_MODE
;
539 else if (! strcmp (argv
[i
], "--emacs")) /* use emacs protocol */
540 use_emacs_interface
= 1;
542 else if (! strcmp (argv
[i
], "-q")) /* don't load user init */
543 inhibit_user_init
= 1;
545 else if (! strcmp (argv
[i
], "-h")
546 || ! strcmp (argv
[i
], "--help"))
548 scm_shell_usage (0, 0);
552 else if (! strcmp (argv
[i
], "-v")
553 || ! strcmp (argv
[i
], "--version"))
555 /* Print version number. */
557 "Copyright (c) 1995, 1996, 1997, 2000 Free Software Foundation\n"
558 "Guile may be distributed under the terms of the GNU General Public Licence;\n"
559 "certain other uses are permitted as well. For details, see the file\n"
560 "`COPYING', which is included in the Guile distribution.\n"
561 "There is no warranty, to the extent permitted by law.\n",
562 SCM_STRING_CHARS (scm_version ()));
568 fprintf (stderr
, "%s: Unrecognized switch `%s'\n",
569 scm_usage_name
, argv
[i
]);
570 scm_shell_usage (1, 0);
574 /* Check to make sure the -ds got a -s. */
575 if (!SCM_NULLP (do_script
))
576 scm_shell_usage (1, "the `-ds' switch requires the use of `-s' as well");
578 /* Make any remaining arguments available to the
579 script/command/whatever. */
580 scm_set_program_arguments (argc
? argc
- i
: 0, argv
+ i
, argv0
);
582 /* If the --emacs switch was set, now is when we process it. */
583 scm_sysintern ("use-emacs-interface", SCM_BOOL (use_emacs_interface
));
585 /* Handle the `-e' switch, if it was specified. */
586 if (!SCM_NULLP (entry_point
))
587 tail
= scm_cons (scm_cons2 (entry_point
,
588 scm_cons (sym_command_line
, SCM_EOL
),
592 /* If we didn't end with a -c or a -s, start the repl. */
595 tail
= scm_cons (scm_cons (sym_top_repl
, SCM_EOL
), tail
);
599 /* After doing all the other actions prescribed by the command line,
601 tail
= scm_cons (scm_cons (sym_quit
, SCM_EOL
),
603 /* Allow asyncs (signal handlers etc.) to be run. */
607 /* After the following line, actions will be added to the front. */
608 tail
= scm_reverse_x (tail
, SCM_UNDEFINED
);
610 /* If we didn't end with a -c or a -s and didn't supply a -q, load
611 the user's customization file. */
612 if (interactive
&& !inhibit_user_init
)
614 tail
= scm_cons (scm_cons (sym_load_user_init
, SCM_EOL
), tail
);
618 SCM val
= scm_cons (sym_begin
, tail
);
621 scm_write (val
, SCM_UNDEFINED
);
622 scm_newline (SCM_UNDEFINED
);
631 scm_shell (int argc
, char **argv
)
633 /* If present, add SCSH-style meta-arguments from the top of the
634 script file to the argument vector. See the SCSH manual: "The
635 meta argument" for more details. */
637 char **new_argv
= scm_get_meta_args (argc
, argv
);
642 argc
= scm_count_argv (new_argv
);
646 exit (scm_exit_status (scm_eval_x (scm_compile_shell_switches (argc
, argv
),
647 scm_the_root_module ())));
654 #ifndef SCM_MAGIC_SNARFER
655 #include "libguile/script.x"