1 /* Copyright (C) 1994, 1995, 1996, 1997 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 */
53 #include <unistd.h> /* for X_OK define */
56 /* Concatentate str2 onto str1 at position n and return concatenated
57 string if file exists; 0 otherwise. */
60 scm_cat_path (str1
, str2
, n
)
69 long len
= strlen (str1
);
70 str1
= (char *) realloc (str1
, (scm_sizet
) (len
+ n
+ 1));
73 strncat (str1
+ len
, str2
, n
);
76 str1
= (char *) malloc ((scm_sizet
) (n
+ 1));
80 strncat (str1
, str2
, n
);
90 /* fprintf(stderr, "Trying %s\n", path);fflush(stderr); */
93 SCM_SYSCALL (f
= fopen (path
, "r");
105 scm_sep_init_try (path
, sep
, initname
)
107 const char *sep
, *initname
;
110 path
= scm_cat_path (path
, sep
, 0L);
112 path
= scm_cat_path (path
, initname
, 0L);
113 return scm_try_path (path
);
117 #ifndef LINE_INCREMENTORS
118 #define LINE_INCREMENTORS '\n'
120 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f':case 26
122 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f'
123 #endif /* def MSDOS */
124 #endif /* ndef LINE_INCREMENTORS */
127 #define MAXPATHLEN 80
128 #endif /* ndef MAXPATHLEN */
131 #endif /* ndef X_OK */
135 scm_find_executable (const char *name
)
137 char tbuf
[MAXPATHLEN
];
141 /* fprintf(stderr, "s_f_e checking access %s ->%d\n", name, access(name, X_OK)); fflush(stderr); */
142 if (access (name
, X_OK
))
144 f
= fopen (name
, "r");
147 if ((fgetc (f
) == '#') && (fgetc (f
) == '!'))
150 switch (tbuf
[i
++] = fgetc (f
))
152 case /*WHITE_SPACES */ ' ':
159 return scm_cat_path (0L, tbuf
, 0L);
163 return scm_cat_path (0L, name
, 0L);
169 #define DEFAULT_PATH "C:\\DOS"
170 #define PATH_DELIMITER ';'
171 #define ABSOLUTE_FILENAME_P(fname) ((fname[0] == '\\') \
172 || (fname[0] && (fname[1] == ':')))
175 dld_find_executable (file
)
178 /* fprintf(stderr, "dld_find_executable %s -> %s\n", file, scm_cat_path(0L, file, 0L)); fflush(stderr); */
179 return scm_cat_path (0L, file
, 0L);
181 #endif /* def MSDOS */
184 /* Read a \nnn-style escape. We've just read the backslash. */
192 for (i
= 0; i
< 3; i
++)
195 if ('0' <= c
&& c
<= '7')
196 value
= (value
* 8) + (c
- '0');
198 scm_wta (SCM_UNDEFINED
,
199 "malformed script: bad octal backslash escape",
200 "script argument parser");
207 script_get_backslash (f
)
214 case 'a': return '\a';
215 case 'b': return '\b';
216 case 'f': return '\f';
217 case 'n': return '\n';
218 case 'r': return '\r';
219 case 't': return '\t';
220 case 'v': return '\v';
228 case '0': case '1': case '2': case '3':
229 case '4': case '5': case '6': case '7':
231 return script_get_octal (f
);
234 scm_wta (SCM_UNDEFINED
,
235 "malformed script: backslash followed by EOF",
236 "script argument parser");
237 return 0; /* not reached? */
240 scm_wta (SCM_UNDEFINED
,
241 "malformed script: bad backslash sequence",
242 "script argument parser");
243 return 0; /* not reached? */
253 char *buf
= malloc (size
+ 1);
265 c
= script_get_backslash (f
);
266 /* The above produces a new character to add to the argument.
271 size
= (size
+ 1) * 2;
272 buf
= realloc (buf
, size
);
280 /* This may terminate an arg now, but it will terminate the
281 entire list next time through. */
289 /* Otherwise, those characters terminate the argument; fall
297 scm_wta (SCM_UNDEFINED
,
298 "malformed script: TAB in meta-arguments",
300 return 0; /* not reached? */
307 script_meta_arg_P (arg
)
328 scm_get_meta_args (argc
, argv
)
332 int nargc
= argc
, argi
= 1, nargi
= 1;
334 if (!(argc
> 2 && script_meta_arg_P (argv
[1])))
336 if (!(nargv
= (char **) malloc ((1 + nargc
) * sizeof (char *))))
339 while (((argi
+ 1) < argc
) && (script_meta_arg_P (argv
[argi
])))
341 FILE *f
= fopen (argv
[++argi
], "r");
344 nargc
--; /* to compensate for replacement of '\\' */
356 while ((narg
= script_read_arg (f
)))
357 if (!(nargv
= (char **) realloc (nargv
,
358 (1 + ++nargc
) * sizeof (char *))))
361 nargv
[nargi
++] = narg
;
363 nargv
[nargi
++] = argv
[argi
++];
367 nargv
[nargi
++] = argv
[argi
++];
372 scm_count_argv (argv
)
382 /* For use in error messages. */
383 char *scm_usage_name
= 0;
386 scm_shell_usage (int fatal
, char *message
)
389 fprintf (stderr
, "%s\n", message
);
392 "Usage: %s OPTION ...\n"
393 "Evaluate Scheme code, interactively or from a script.\n"
395 " -s SCRIPT load Scheme source code from FILE, and exit\n"
396 " -c EXPR evalute Scheme expression EXPR, and exit\n"
397 " -- stop scanning arguments; run interactively\n"
398 "The above switches stop argument processing, and pass all\n"
399 "remaining arguments as the value of (command-line).\n"
401 " -l FILE load Scheme source code from FILE\n"
402 " -e FUNCTION after reading script, apply FUNCTION to\n"
403 " command line arguments\n"
404 " -ds do -s script at this point\n"
405 " --emacs enable Emacs protocol (experimental)\n"
406 " -h, --help display this help and exit\n"
407 " -v, --version display version information and exit\n"
408 " \\ read arguments from following script lines\n",
416 /* Some symbols used by the command-line compiler. */
417 SCM_SYMBOL (sym_load
, "load");
418 SCM_SYMBOL (sym_eval_string
, "eval-string");
419 SCM_SYMBOL (sym_command_line
, "command-line");
420 SCM_SYMBOL (sym_begin
, "begin");
421 SCM_SYMBOL (sym_load_user_init
, "load-user-init");
422 SCM_SYMBOL (sym_top_repl
, "top-repl");
423 SCM_SYMBOL (sym_quit
, "quit");
426 /* The boot code "ice-9/boot-9" is only loaded by
427 SCM_COMPILE_SHELL_SWITCHES when this is false. The unexec code
428 uses this, to keep ice_9 from being loaded into dumped guile
430 int scm_ice_9_already_loaded
= 0;
432 /* Given an array of command-line switches, return a Scheme expression
433 to carry out the actions specified by the switches.
435 If you told me this should have been written in Scheme, I'd
436 probably agree. I'd say I didn't feel comfortable doing that in
437 the present system. You'd say, well, fix the system so you are
438 comfortable doing that. I'd agree again. *shrug*
440 We load the ice-9 system from here. It might be nicer if the
441 libraries initialized from the inner_main function in guile.c (which
442 will be auto-generated eventually) could assume ice-9 were already
443 loaded. Then again, it might be nice if ice-9 could assume that
444 certain libraries were already loaded. The solution is to break up
445 ice-9 into modules which can be frozen and statically linked like any
446 other module. Then all the modules can describe their dependencies in
447 the usual way, and the auto-generated inner_main will do the right
451 scm_compile_shell_switches (int argc
, char **argv
)
453 SCM tail
= SCM_EOL
; /* We accumulate the list backwards,
454 and then reverse! it before we
456 SCM do_script
= SCM_EOL
; /* The element of the list containing
457 the "load" command, in case we get
459 SCM entry_point
= SCM_EOL
; /* for -e switch */
460 int interactive
= 1; /* Should we go interactive when done? */
461 int use_emacs_interface
= 0;
467 scm_usage_name
= strrchr (argv
[0], '/');
468 if (! scm_usage_name
)
469 scm_usage_name
= argv
[0];
473 if (! scm_usage_name
)
474 scm_usage_name
= "guile";
475 argv0
= scm_usage_name
;
477 for (i
= 1; i
< argc
; i
++)
479 if (! strcmp (argv
[i
], "-s")) /* load script */
482 scm_shell_usage (1, "missing argument to `-s' switch");
484 /* If we specified the -ds option, do_script points to the
485 cdr of an expression like (load #f); we replace the car
486 (i.e., the #f) with the script name. */
487 if (do_script
!= SCM_EOL
)
489 SCM_SETCAR (do_script
, scm_makfrom0str (argv
[i
]));
493 /* Construct an application of LOAD to the script name. */
494 tail
= scm_cons (scm_cons2 (sym_load
,
495 scm_makfrom0str (argv
[i
]),
504 else if (! strcmp (argv
[i
], "-c")) /* evaluate expr */
507 scm_shell_usage (1, "missing argument to `-c' switch");
508 tail
= scm_cons (scm_cons2 (sym_eval_string
,
509 scm_makfrom0str (argv
[i
]),
517 else if (! strcmp (argv
[i
], "--")) /* end args; go interactive */
523 else if (! strcmp (argv
[i
], "-l")) /* load a file */
526 tail
= scm_cons (scm_cons2 (sym_load
,
527 scm_makfrom0str (argv
[i
]),
531 scm_shell_usage (1, "missing argument to `-l' switch");
534 else if (! strcmp (argv
[i
], "-e")) /* entry point */
537 entry_point
= gh_symbol2scm (argv
[i
]);
539 scm_shell_usage (1, "missing argument to `-e' switch");
542 else if (! strcmp (argv
[i
], "-ds")) /* do script here */
544 /* We put a dummy "load" expression, and let the -s put the
546 if (do_script
!= SCM_EOL
)
547 scm_shell_usage (1, "the -ds switch may only be specified once");
548 do_script
= scm_cons (SCM_BOOL_F
, SCM_EOL
);
549 tail
= scm_cons (scm_cons (sym_load
, do_script
),
553 else if (! strcmp (argv
[i
], "--emacs")) /* use emacs protocol */
554 use_emacs_interface
= 1;
556 else if (! strcmp (argv
[i
], "-h")
557 || ! strcmp (argv
[i
], "--help"))
559 scm_shell_usage (0, 0);
563 else if (! strcmp (argv
[i
], "-v")
564 || ! strcmp (argv
[i
], "--version"))
566 /* Print version number. */
568 "Copyright (c) 1995, 1996 Free Software Foundation\n"
569 "Guile may be distributed under the terms of the GNU General Public Licence;\n"
570 "certain other uses are permitted as well. For details, see the file\n"
571 "`COPYING', which is included in the Guile distribution.\n"
572 "There is no warranty, to the extent permitted by law.\n",
579 fprintf (stderr
, "%s: Unrecognized switch `%s'\n",
580 scm_usage_name
, argv
[i
]);
581 scm_shell_usage (1, 0);
585 /* Check to make sure the -ds got a -s. */
586 if (do_script
!= SCM_EOL
)
587 scm_shell_usage (1, "the `-ds' switch requires the use of `-s' as well");
589 /* Make any remaining arguments available to the
590 script/command/whatever. */
591 scm_set_program_arguments (argc
- i
, argv
+ i
, argv0
);
593 /* If the --emacs switch was set, now is when we process it. */
594 scm_sysintern ("use-emacs-interface",
595 (use_emacs_interface
) ? SCM_BOOL_T
: SCM_BOOL_F
);
597 /* Handle the `-e' switch, if it was specified. */
598 if (entry_point
!= SCM_EOL
)
599 tail
= scm_cons (scm_cons2 (entry_point
,
600 scm_cons (sym_command_line
, SCM_EOL
),
604 /* If we didn't end with a -c or a -s, load the user's customization
605 file, and start the repl. */
608 tail
= scm_cons (scm_cons (sym_load_user_init
, SCM_EOL
), tail
);
609 tail
= scm_cons (scm_cons (sym_top_repl
, SCM_EOL
), tail
);
613 /* After doing all the other actions prescribed by the command line,
615 tail
= scm_cons (scm_cons (sym_quit
, SCM_EOL
),
617 /* Allow asyncs (signal handlers etc.) to be run. */
621 /* We want a path only containing directories from SCHEME_LOAD_PATH,
622 SCM_SITE_DIR and SCM_LIBRARY_DIR when searching for the site init
623 file, so we do this before loading Ice-9. */
624 SCM init_path
= scm_sys_search_load_path (scm_makfrom0str ("init.scm"));
627 if (!scm_ice_9_already_loaded
)
628 scm_primitive_load_path (scm_makfrom0str ("ice-9/boot-9.scm"));
630 /* Load the init.scm file. */
631 if (SCM_NFALSEP (init_path
))
632 scm_primitive_load (init_path
);
636 SCM val
= scm_cons (sym_begin
, scm_list_reverse_x (tail
, SCM_UNDEFINED
));
639 scm_write (val
, SCM_UNDEFINED
);
640 scm_newline (SCM_UNDEFINED
);
649 scm_shell (argc
, argv
)
653 /* If present, add SCSH-style meta-arguments from the top of the
654 script file to the argument vector. See the SCSH manual: "The
655 meta argument" for more details. */
657 char **new_argv
= scm_get_meta_args (argc
, argv
);
662 argc
= scm_count_argv (new_argv
);
666 exit (scm_exit_status (scm_eval_x (scm_compile_shell_switches (argc
,argv
))));