1 /* Copyright (C) 1994, 1995, 1996, 1997, 1998 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 */
54 #include <unistd.h> /* for X_OK define */
57 /* Concatentate str2 onto str1 at position n and return concatenated
58 string if file exists; 0 otherwise. */
61 scm_cat_path (str1
, str2
, n
)
70 long len
= strlen (str1
);
71 str1
= (char *) realloc (str1
, (scm_sizet
) (len
+ n
+ 1));
74 strncat (str1
+ len
, str2
, n
);
77 str1
= (char *) malloc ((scm_sizet
) (n
+ 1));
81 strncat (str1
, str2
, n
);
91 /* fprintf(stderr, "Trying %s\n", path);fflush(stderr); */
94 SCM_SYSCALL (f
= fopen (path
, "r");
106 scm_sep_init_try (path
, sep
, initname
)
108 const char *sep
, *initname
;
111 path
= scm_cat_path (path
, sep
, 0L);
113 path
= scm_cat_path (path
, initname
, 0L);
114 return scm_try_path (path
);
118 #ifndef LINE_INCREMENTORS
119 #define LINE_INCREMENTORS '\n'
121 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f':case 26
123 #define WHITE_SPACES ' ':case '\t':case '\r':case '\f'
124 #endif /* def MSDOS */
125 #endif /* ndef LINE_INCREMENTORS */
128 #define MAXPATHLEN 80
129 #endif /* ndef MAXPATHLEN */
132 #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);
167 /* Read a \nnn-style escape. We've just read the backslash. */
175 for (i
= 0; i
< 3; i
++)
178 if ('0' <= c
&& c
<= '7')
179 value
= (value
* 8) + (c
- '0');
181 scm_wta (SCM_UNDEFINED
,
182 "malformed script: bad octal backslash escape",
183 "script argument parser");
190 script_get_backslash (f
)
197 case 'a': return '\a';
198 case 'b': return '\b';
199 case 'f': return '\f';
200 case 'n': return '\n';
201 case 'r': return '\r';
202 case 't': return '\t';
203 case 'v': return '\v';
211 case '0': case '1': case '2': case '3':
212 case '4': case '5': case '6': case '7':
214 return script_get_octal (f
);
217 scm_wta (SCM_UNDEFINED
,
218 "malformed script: backslash followed by EOF",
219 "script argument parser");
220 return 0; /* not reached? */
223 scm_wta (SCM_UNDEFINED
,
224 "malformed script: bad backslash sequence",
225 "script argument parser");
226 return 0; /* not reached? */
236 char *buf
= malloc (size
+ 1);
248 c
= script_get_backslash (f
);
249 /* The above produces a new character to add to the argument.
254 size
= (size
+ 1) * 2;
255 buf
= realloc (buf
, size
);
263 /* This may terminate an arg now, but it will terminate the
264 entire list next time through. */
272 /* Otherwise, those characters terminate the argument; fall
280 scm_wta (SCM_UNDEFINED
,
281 "malformed script: TAB in meta-arguments",
283 return 0; /* not reached? */
290 script_meta_arg_P (arg
)
311 scm_get_meta_args (argc
, argv
)
315 int nargc
= argc
, argi
= 1, nargi
= 1;
317 if (!(argc
> 2 && script_meta_arg_P (argv
[1])))
319 if (!(nargv
= (char **) malloc ((1 + nargc
) * sizeof (char *))))
322 while (((argi
+ 1) < argc
) && (script_meta_arg_P (argv
[argi
])))
324 FILE *f
= fopen (argv
[++argi
], "r");
327 nargc
--; /* to compensate for replacement of '\\' */
339 while ((narg
= script_read_arg (f
)))
340 if (!(nargv
= (char **) realloc (nargv
,
341 (1 + ++nargc
) * sizeof (char *))))
344 nargv
[nargi
++] = narg
;
346 nargv
[nargi
++] = argv
[argi
++];
350 nargv
[nargi
++] = argv
[argi
++];
355 scm_count_argv (argv
)
365 /* For use in error messages. */
366 char *scm_usage_name
= 0;
369 scm_shell_usage (int fatal
, char *message
)
372 fprintf (stderr
, "%s\n", message
);
375 "Usage: %s OPTION ...\n"
376 "Evaluate Scheme code, interactively or from a script.\n"
378 " -s SCRIPT load Scheme source code from FILE, and exit\n"
379 " -c EXPR evalute Scheme expression EXPR, and exit\n"
380 " -- stop scanning arguments; run interactively\n"
381 "The above switches stop argument processing, and pass all\n"
382 "remaining arguments as the value of (command-line).\n"
384 " -l FILE load Scheme source code from FILE\n"
385 " -e FUNCTION after reading script, apply FUNCTION to\n"
386 " command line arguments\n"
387 " -ds do -s script at this point\n"
388 " -q inhibit loading of user init file\n"
389 " --emacs enable Emacs protocol (experimental)\n"
390 " -h, --help display this help and exit\n"
391 " -v, --version display version information and exit\n"
392 " \\ read arguments from following script lines\n",
400 /* Some symbols used by the command-line compiler. */
401 SCM_SYMBOL (sym_load
, "load");
402 SCM_SYMBOL (sym_eval_string
, "eval-string");
403 SCM_SYMBOL (sym_command_line
, "command-line");
404 SCM_SYMBOL (sym_begin
, "begin");
405 SCM_SYMBOL (sym_load_user_init
, "load-user-init");
406 SCM_SYMBOL (sym_top_repl
, "top-repl");
407 SCM_SYMBOL (sym_quit
, "quit");
410 /* Given an array of command-line switches, return a Scheme expression
411 to carry out the actions specified by the switches.
413 If you told me this should have been written in Scheme, I'd
414 probably agree. I'd say I didn't feel comfortable doing that in
415 the present system. You'd say, well, fix the system so you are
416 comfortable doing that. I'd agree again. *shrug*
418 We load the ice-9 system from here. It might be nicer if the
419 libraries initialized from the inner_main function in guile.c (which
420 will be auto-generated eventually) could assume ice-9 were already
421 loaded. Then again, it might be nice if ice-9 could assume that
422 certain libraries were already loaded. The solution is to break up
423 ice-9 into modules which can be frozen and statically linked like any
424 other module. Then all the modules can describe their dependencies in
425 the usual way, and the auto-generated inner_main will do the right
428 static char guile
[] = "guile";
431 scm_compile_shell_switches (int argc
, char **argv
)
433 SCM tail
= SCM_EOL
; /* We accumulate the list backwards,
434 and then reverse! it before we
436 SCM do_script
= SCM_EOL
; /* The element of the list containing
437 the "load" command, in case we get
439 SCM entry_point
= SCM_EOL
; /* for -e switch */
440 int interactive
= 1; /* Should we go interactive when done? */
441 int inhibit_user_init
= 0; /* Don't load user init file */
442 int use_emacs_interface
= 0;
449 scm_usage_name
= strrchr (argv
[0], '/');
450 if (! scm_usage_name
)
451 scm_usage_name
= argv
[0];
455 if (! scm_usage_name
)
456 scm_usage_name
= guile
;
458 for (i
= 1; i
< argc
; i
++)
460 if (! strcmp (argv
[i
], "-s")) /* load script */
463 scm_shell_usage (1, "missing argument to `-s' switch");
465 /* If we specified the -ds option, do_script points to the
466 cdr of an expression like (load #f); we replace the car
467 (i.e., the #f) with the script name. */
468 if (do_script
!= SCM_EOL
)
470 SCM_SETCAR (do_script
, scm_makfrom0str (argv
[i
]));
474 /* Construct an application of LOAD to the script name. */
475 tail
= scm_cons (scm_cons2 (sym_load
,
476 scm_makfrom0str (argv
[i
]),
485 else if (! strcmp (argv
[i
], "-c")) /* evaluate expr */
488 scm_shell_usage (1, "missing argument to `-c' switch");
489 tail
= scm_cons (scm_cons2 (sym_eval_string
,
490 scm_makfrom0str (argv
[i
]),
498 else if (! strcmp (argv
[i
], "--")) /* end args; go interactive */
504 else if (! strcmp (argv
[i
], "-l")) /* load a file */
507 tail
= scm_cons (scm_cons2 (sym_load
,
508 scm_makfrom0str (argv
[i
]),
512 scm_shell_usage (1, "missing argument to `-l' switch");
515 else if (! strcmp (argv
[i
], "-e")) /* entry point */
518 entry_point
= gh_symbol2scm (argv
[i
]);
520 scm_shell_usage (1, "missing argument to `-e' switch");
523 else if (! strcmp (argv
[i
], "-ds")) /* do script here */
525 /* We put a dummy "load" expression, and let the -s put the
527 if (do_script
!= SCM_EOL
)
528 scm_shell_usage (1, "the -ds switch may only be specified once");
529 do_script
= scm_cons (SCM_BOOL_F
, SCM_EOL
);
530 tail
= scm_cons (scm_cons (sym_load
, do_script
),
534 else if (! strcmp (argv
[i
], "--emacs")) /* use emacs protocol */
535 use_emacs_interface
= 1;
537 else if (! strcmp (argv
[i
], "-q")) /* don't load user init */
538 inhibit_user_init
= 1;
540 else if (! strcmp (argv
[i
], "-h")
541 || ! strcmp (argv
[i
], "--help"))
543 scm_shell_usage (0, 0);
547 else if (! strcmp (argv
[i
], "-v")
548 || ! strcmp (argv
[i
], "--version"))
550 /* Print version number. */
552 "Copyright (c) 1995, 1996, 1997 Free Software Foundation\n"
553 "Guile may be distributed under the terms of the GNU General Public Licence;\n"
554 "certain other uses are permitted as well. For details, see the file\n"
555 "`COPYING', which is included in the Guile distribution.\n"
556 "There is no warranty, to the extent permitted by law.\n",
557 SCM_CHARS (scm_version ()));
563 fprintf (stderr
, "%s: Unrecognized switch `%s'\n",
564 scm_usage_name
, argv
[i
]);
565 scm_shell_usage (1, 0);
569 /* Check to make sure the -ds got a -s. */
570 if (do_script
!= SCM_EOL
)
571 scm_shell_usage (1, "the `-ds' switch requires the use of `-s' as well");
573 /* Make any remaining arguments available to the
574 script/command/whatever. */
575 scm_set_program_arguments (argc
? argc
- i
: 0, argv
+ i
, argv0
);
577 /* If the --emacs switch was set, now is when we process it. */
579 SCM vcell
= scm_sysintern0_no_module_lookup ("use-emacs-interface");
580 SCM_SETCDR (vcell
, use_emacs_interface
? SCM_BOOL_T
: SCM_BOOL_F
);
583 /* Handle the `-e' switch, if it was specified. */
584 if (entry_point
!= SCM_EOL
)
585 tail
= scm_cons (scm_cons2 (entry_point
,
586 scm_cons (sym_command_line
, SCM_EOL
),
590 /* If we didn't end with a -c or a -s, start the repl. */
593 tail
= scm_cons (scm_cons (sym_top_repl
, SCM_EOL
), tail
);
597 /* After doing all the other actions prescribed by the command line,
599 tail
= scm_cons (scm_cons (sym_quit
, SCM_EOL
),
601 /* Allow asyncs (signal handlers etc.) to be run. */
605 /* After the following line, actions will be added to the front. */
606 tail
= scm_reverse_x (tail
, SCM_UNDEFINED
);
608 /* If we didn't end with a -c or a -s and didn't supply a -q, load
609 the user's customization file. */
610 if (interactive
&& !inhibit_user_init
)
612 tail
= scm_cons (scm_cons (sym_load_user_init
, SCM_EOL
), tail
);
616 SCM val
= scm_cons (sym_begin
, tail
);
619 scm_write (val
, SCM_UNDEFINED
);
620 scm_newline (SCM_UNDEFINED
);
629 scm_shell (argc
, 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
))));