]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* input.c -- functions to perform buffered input with synchronization. */ |
2 | ||
3 | /* Copyright (C) 1992 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License along | |
18 | with Bash; see the file COPYING. If not, write to the Free Software | |
bb70624e | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 | 20 | |
ccc6cda3 | 21 | #include "config.h" |
726f6388 JA |
22 | |
23 | #include "bashtypes.h" | |
d3a24ed2 | 24 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
cce855bc JA |
25 | # include <sys/file.h> |
26 | #endif | |
726f6388 JA |
27 | #include "filecntl.h" |
28 | #include "posixstat.h" | |
29 | #include <stdio.h> | |
30 | #include <errno.h> | |
31 | ||
ccc6cda3 JA |
32 | #if defined (HAVE_UNISTD_H) |
33 | # include <unistd.h> | |
34 | #endif | |
35 | ||
726f6388 | 36 | #include "bashansi.h" |
726f6388 JA |
37 | #include "command.h" |
38 | #include "general.h" | |
39 | #include "input.h" | |
ccc6cda3 JA |
40 | #include "error.h" |
41 | #include "externs.h" | |
726f6388 JA |
42 | |
43 | #if !defined (errno) | |
44 | extern int errno; | |
45 | #endif /* !errno */ | |
46 | ||
ccc6cda3 JA |
47 | /* Functions to handle reading input on systems that don't restart read(2) |
48 | if a signal is received. */ | |
49 | ||
f73dda09 | 50 | static char localbuf[128]; |
ccc6cda3 JA |
51 | static int local_index, local_bufused; |
52 | ||
53 | /* Posix and USG systems do not guarantee to restart read () if it is | |
54 | interrupted by a signal. We do the read ourselves, and restart it | |
55 | if it returns EINTR. */ | |
56 | int | |
57 | getc_with_restart (stream) | |
58 | FILE *stream; | |
59 | { | |
f73dda09 JA |
60 | unsigned char uc; |
61 | ||
ccc6cda3 JA |
62 | /* Try local buffering to reduce the number of read(2) calls. */ |
63 | if (local_index == local_bufused || local_bufused == 0) | |
64 | { | |
65 | while (1) | |
66 | { | |
67 | local_bufused = read (fileno (stream), localbuf, sizeof(localbuf)); | |
68 | if (local_bufused > 0) | |
69 | break; | |
70 | else if (local_bufused == 0 || errno != EINTR) | |
71 | { | |
72 | local_index = 0; | |
73 | return EOF; | |
74 | } | |
75 | } | |
76 | local_index = 0; | |
77 | } | |
f73dda09 JA |
78 | uc = localbuf[local_index++]; |
79 | return uc; | |
ccc6cda3 JA |
80 | } |
81 | ||
82 | int | |
83 | ungetc_with_restart (c, stream) | |
84 | int c; | |
85 | FILE *stream; | |
86 | { | |
87 | if (local_index == 0 || c == EOF) | |
88 | return EOF; | |
f73dda09 JA |
89 | localbuf[--local_index] = c; |
90 | return c; | |
ccc6cda3 | 91 | } |
ccc6cda3 JA |
92 | |
93 | #if defined (BUFFERED_INPUT) | |
94 | ||
95 | /* A facility similar to stdio, but input-only. */ | |
96 | ||
bb70624e JA |
97 | #if defined (USING_BASH_MALLOC) |
98 | # define MAX_INPUT_BUFFER_SIZE 8176 | |
99 | #else | |
100 | # define MAX_INPUT_BUFFER_SIZE 8192 | |
101 | #endif | |
726f6388 JA |
102 | |
103 | #if !defined (SEEK_CUR) | |
104 | # define SEEK_CUR 1 | |
105 | #endif /* !SEEK_CUR */ | |
106 | ||
28ef6c31 JA |
107 | #ifdef max |
108 | # undef max | |
109 | #endif | |
110 | #define max(a, b) (((a) > (b)) ? (a) : (b)) | |
111 | #ifdef min | |
112 | # undef min | |
113 | #endif | |
114 | #define min(a, b) ((a) > (b) ? (b) : (a)) | |
115 | ||
726f6388 JA |
116 | extern int interactive_shell; |
117 | ||
118 | int bash_input_fd_changed; | |
ccc6cda3 | 119 | |
726f6388 JA |
120 | /* This provides a way to map from a file descriptor to the buffer |
121 | associated with that file descriptor, rather than just the other | |
122 | way around. This is needed so that buffers are managed properly | |
123 | in constructs like 3<&4. buffers[x]->b_fd == x -- that is how the | |
124 | correspondence is maintained. */ | |
cce855bc | 125 | static BUFFERED_STREAM **buffers = (BUFFERED_STREAM **)NULL; |
ccc6cda3 | 126 | static int nbuffers; |
726f6388 | 127 | |
726f6388 JA |
128 | #define ALLOCATE_BUFFERS(n) \ |
129 | do { if ((n) >= nbuffers) allocate_buffers (n); } while (0) | |
130 | ||
131 | /* Make sure `buffers' has at least N elements. */ | |
132 | static void | |
133 | allocate_buffers (n) | |
134 | int n; | |
135 | { | |
136 | register int i, orig_nbuffers; | |
137 | ||
138 | orig_nbuffers = nbuffers; | |
139 | nbuffers = n + 20; | |
140 | buffers = (BUFFERED_STREAM **)xrealloc | |
141 | (buffers, nbuffers * sizeof (BUFFERED_STREAM *)); | |
142 | ||
143 | /* Zero out the new buffers. */ | |
144 | for (i = orig_nbuffers; i < nbuffers; i++) | |
145 | buffers[i] = (BUFFERED_STREAM *)NULL; | |
146 | } | |
147 | ||
148 | /* Construct and return a BUFFERED_STREAM corresponding to file descriptor | |
149 | FD, using BUFFER. */ | |
150 | static BUFFERED_STREAM * | |
151 | make_buffered_stream (fd, buffer, bufsize) | |
152 | int fd; | |
153 | char *buffer; | |
cce855bc | 154 | size_t bufsize; |
726f6388 JA |
155 | { |
156 | BUFFERED_STREAM *bp; | |
157 | ||
158 | bp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM)); | |
159 | ALLOCATE_BUFFERS (fd); | |
160 | buffers[fd] = bp; | |
161 | bp->b_fd = fd; | |
162 | bp->b_buffer = buffer; | |
163 | bp->b_size = bufsize; | |
ccc6cda3 | 164 | bp->b_used = bp->b_inputp = bp->b_flag = 0; |
726f6388 JA |
165 | if (bufsize == 1) |
166 | bp->b_flag |= B_UNBUFF; | |
167 | return (bp); | |
168 | } | |
169 | ||
170 | /* Allocate a new BUFFERED_STREAM, copy BP to it, and return the new copy. */ | |
171 | static BUFFERED_STREAM * | |
172 | copy_buffered_stream (bp) | |
173 | BUFFERED_STREAM *bp; | |
174 | { | |
175 | BUFFERED_STREAM *nbp; | |
176 | ||
177 | if (!bp) | |
178 | return ((BUFFERED_STREAM *)NULL); | |
179 | ||
180 | nbp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM)); | |
181 | xbcopy ((char *)bp, (char *)nbp, sizeof (BUFFERED_STREAM)); | |
182 | return (nbp); | |
183 | } | |
184 | ||
28ef6c31 JA |
185 | int |
186 | set_bash_input_fd (fd) | |
187 | int fd; | |
188 | { | |
189 | if (bash_input.type == st_bstream) | |
190 | bash_input.location.buffered_fd = fd; | |
191 | else if (interactive_shell == 0) | |
192 | default_buffered_input = fd; | |
193 | return 0; | |
194 | } | |
195 | ||
196 | int | |
197 | fd_is_bash_input (fd) | |
198 | int fd; | |
199 | { | |
200 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd == fd) | |
201 | return 1; | |
202 | else if (interactive_shell == 0 && default_buffered_input == fd) | |
203 | return 1; | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* Save the buffered stream corresponding to file descriptor FD (which bash | |
208 | is using to read input) to a buffered stream associated with NEW_FD. If | |
209 | NEW_FD is -1, a new file descriptor is allocated with fcntl. The new | |
210 | file descriptor is returned on success, -1 on error. */ | |
211 | int | |
212 | save_bash_input (fd, new_fd) | |
213 | int fd, new_fd; | |
214 | { | |
215 | int nfd; | |
216 | ||
217 | /* Sync the stream so we can re-read from the new file descriptor. We | |
218 | might be able to avoid this by copying the buffered stream verbatim | |
219 | to the new file descriptor. */ | |
220 | if (buffers[fd]) | |
221 | sync_buffered_stream (fd); | |
222 | ||
223 | /* Now take care of duplicating the file descriptor that bash is | |
224 | using for input, so we can reinitialize it later. */ | |
225 | nfd = (new_fd == -1) ? fcntl (fd, F_DUPFD, 10) : new_fd; | |
226 | if (nfd == -1) | |
227 | { | |
228 | if (fcntl (fd, F_GETFD, 0) == 0) | |
229 | sys_error ("cannot allocate new file descriptor for bash input from fd %d", fd); | |
230 | return -1; | |
231 | } | |
232 | ||
233 | if (buffers[nfd]) | |
234 | { | |
235 | /* What's this? A stray buffer without an associated open file | |
236 | descriptor? Free up the buffer and report the error. */ | |
d3a24ed2 | 237 | internal_error ("save_bash_input: buffer already exists for new fd %d", nfd); |
28ef6c31 JA |
238 | free_buffered_stream (buffers[nfd]); |
239 | } | |
240 | ||
241 | /* Reinitialize bash_input.location. */ | |
242 | if (bash_input.type == st_bstream) | |
243 | { | |
244 | bash_input.location.buffered_fd = nfd; | |
245 | fd_to_buffered_stream (nfd); | |
246 | close_buffered_fd (fd); /* XXX */ | |
247 | } | |
248 | else | |
249 | /* If the current input type is not a buffered stream, but the shell | |
250 | is not interactive and therefore using a buffered stream to read | |
251 | input (e.g. with an `eval exec 3>output' inside a script), note | |
252 | that the input fd has been changed. pop_stream() looks at this | |
253 | value and adjusts the input fd to the new value of | |
254 | default_buffered_input accordingly. */ | |
255 | bash_input_fd_changed++; | |
256 | ||
257 | if (default_buffered_input == fd) | |
258 | default_buffered_input = nfd; | |
259 | ||
260 | SET_CLOSE_ON_EXEC (nfd); | |
261 | return nfd; | |
262 | } | |
263 | ||
726f6388 JA |
264 | /* Check that file descriptor FD is not the one that bash is currently |
265 | using to read input from a script. FD is about to be duplicated onto, | |
266 | which means that the kernel will close it for us. If FD is the bash | |
267 | input file descriptor, we need to seek backwards in the script (if | |
268 | possible and necessary -- scripts read from stdin are still unbuffered), | |
269 | allocate a new file descriptor to use for bash input, and re-initialize | |
28ef6c31 JA |
270 | the buffered stream. Make sure the file descriptor used to save bash |
271 | input is set close-on-exec. Returns 0 on success, -1 on failure. This | |
272 | works only if fd is > 0 -- if fd == 0 and bash is reading input from | |
273 | fd 0, save_bash_input is used instead, to cooperate with input | |
274 | redirection (look at redir.c:add_undo_redirect()). */ | |
726f6388 JA |
275 | int |
276 | check_bash_input (fd) | |
277 | int fd; | |
278 | { | |
d3a24ed2 CR |
279 | if (fd_is_bash_input (fd)) |
280 | { | |
281 | if (fd > 0) | |
282 | return ((save_bash_input (fd, -1) == -1) ? -1 : 0); | |
283 | else if (fd == 0) | |
284 | return ((sync_buffered_stream (fd) == -1) ? -1 : 0); | |
285 | } | |
726f6388 JA |
286 | return 0; |
287 | } | |
288 | ||
289 | /* This is the buffered stream analogue of dup2(fd1, fd2). The | |
290 | BUFFERED_STREAM corresponding to fd2 is deallocated, if one exists. | |
291 | BUFFERS[fd1] is copied to BUFFERS[fd2]. This is called by the | |
292 | redirect code for constructs like 4<&0 and 3</etc/rc.local. */ | |
ccc6cda3 | 293 | int |
726f6388 JA |
294 | duplicate_buffered_stream (fd1, fd2) |
295 | int fd1, fd2; | |
296 | { | |
297 | int is_bash_input, m; | |
298 | ||
299 | if (fd1 == fd2) | |
300 | return 0; | |
301 | ||
302 | m = max (fd1, fd2); | |
303 | ALLOCATE_BUFFERS (m); | |
304 | ||
305 | /* If FD2 is the file descriptor bash is currently using for shell input, | |
306 | we need to do some extra work to make sure that the buffered stream | |
307 | actually exists (it might not if fd1 was not active, and the copy | |
308 | didn't actually do anything). */ | |
309 | is_bash_input = (bash_input.type == st_bstream) && | |
310 | (bash_input.location.buffered_fd == fd2); | |
311 | ||
312 | if (buffers[fd2]) | |
313 | free_buffered_stream (buffers[fd2]); | |
314 | buffers[fd2] = copy_buffered_stream (buffers[fd1]); | |
315 | if (buffers[fd2]) | |
316 | buffers[fd2]->b_fd = fd2; | |
317 | ||
28ef6c31 JA |
318 | if (is_bash_input) |
319 | { | |
320 | if (!buffers[fd2]) | |
321 | fd_to_buffered_stream (fd2); | |
322 | buffers[fd2]->b_flag |= B_WASBASHINPUT; | |
323 | } | |
ccc6cda3 | 324 | |
726f6388 JA |
325 | return (fd2); |
326 | } | |
327 | ||
328 | /* Return 1 if a seek on FD will succeed. */ | |
28ef6c31 | 329 | #ifndef __CYGWIN__ |
cce855bc JA |
330 | # define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0) |
331 | #else | |
332 | # define fd_is_seekable(fd) 0 | |
28ef6c31 | 333 | #endif /* __CYGWIN__ */ |
726f6388 JA |
334 | |
335 | /* Take FD, a file descriptor, and create and return a buffered stream | |
336 | corresponding to it. If something is wrong and the file descriptor | |
337 | is invalid, return a NULL stream. */ | |
338 | BUFFERED_STREAM * | |
339 | fd_to_buffered_stream (fd) | |
340 | int fd; | |
341 | { | |
342 | char *buffer; | |
cce855bc | 343 | size_t size; |
726f6388 JA |
344 | struct stat sb; |
345 | ||
346 | if (fstat (fd, &sb) < 0) | |
347 | { | |
348 | close (fd); | |
349 | return ((BUFFERED_STREAM *)NULL); | |
350 | } | |
351 | ||
28ef6c31 JA |
352 | size = (fd_is_seekable (fd)) ? min (sb.st_size, MAX_INPUT_BUFFER_SIZE) : 1; |
353 | if (size == 0) | |
726f6388 | 354 | size = 1; |
726f6388 JA |
355 | buffer = (char *)xmalloc (size); |
356 | ||
357 | return (make_buffered_stream (fd, buffer, size)); | |
358 | } | |
359 | ||
360 | /* Return a buffered stream corresponding to FILE, a file name. */ | |
361 | BUFFERED_STREAM * | |
362 | open_buffered_stream (file) | |
363 | char *file; | |
364 | { | |
365 | int fd; | |
366 | ||
367 | fd = open (file, O_RDONLY); | |
ccc6cda3 | 368 | return ((fd >= 0) ? fd_to_buffered_stream (fd) : (BUFFERED_STREAM *)NULL); |
726f6388 JA |
369 | } |
370 | ||
371 | /* Deallocate a buffered stream and free up its resources. Make sure we | |
372 | zero out the slot in BUFFERS that points to BP. */ | |
373 | void | |
374 | free_buffered_stream (bp) | |
375 | BUFFERED_STREAM *bp; | |
376 | { | |
377 | int n; | |
378 | ||
379 | if (!bp) | |
380 | return; | |
381 | ||
382 | n = bp->b_fd; | |
383 | if (bp->b_buffer) | |
384 | free (bp->b_buffer); | |
385 | free (bp); | |
386 | buffers[n] = (BUFFERED_STREAM *)NULL; | |
387 | } | |
388 | ||
389 | /* Close the file descriptor associated with BP, a buffered stream, and free | |
390 | up the stream. Return the status of closing BP's file descriptor. */ | |
391 | int | |
392 | close_buffered_stream (bp) | |
393 | BUFFERED_STREAM *bp; | |
394 | { | |
395 | int fd; | |
396 | ||
397 | if (!bp) | |
398 | return (0); | |
399 | fd = bp->b_fd; | |
400 | free_buffered_stream (bp); | |
401 | return (close (fd)); | |
402 | } | |
403 | ||
404 | /* Deallocate the buffered stream associated with file descriptor FD, and | |
405 | close FD. Return the status of the close on FD. */ | |
406 | int | |
407 | close_buffered_fd (fd) | |
408 | int fd; | |
409 | { | |
f73dda09 JA |
410 | if (fd < 0) |
411 | { | |
412 | errno = EBADF; | |
413 | return -1; | |
414 | } | |
726f6388 JA |
415 | if (fd >= nbuffers || !buffers || !buffers[fd]) |
416 | return (close (fd)); | |
417 | return (close_buffered_stream (buffers[fd])); | |
418 | } | |
419 | ||
cce855bc JA |
420 | /* Make the BUFFERED_STREAM associcated with buffers[FD] be BP, and return |
421 | the old BUFFERED_STREAM. */ | |
422 | BUFFERED_STREAM * | |
423 | set_buffered_stream (fd, bp) | |
424 | int fd; | |
425 | BUFFERED_STREAM *bp; | |
426 | { | |
427 | BUFFERED_STREAM *ret; | |
428 | ||
429 | ret = buffers[fd]; | |
430 | buffers[fd] = bp; | |
431 | return ret; | |
432 | } | |
433 | ||
726f6388 JA |
434 | /* Read a buffer full of characters from BP, a buffered stream. */ |
435 | static int | |
436 | b_fill_buffer (bp) | |
437 | BUFFERED_STREAM *bp; | |
438 | { | |
f73dda09 JA |
439 | ssize_t nr; |
440 | ||
441 | nr = zread (bp->b_fd, bp->b_buffer, bp->b_size); | |
442 | if (nr <= 0) | |
726f6388 | 443 | { |
f73dda09 | 444 | bp->b_used = 0; |
726f6388 | 445 | bp->b_buffer[0] = 0; |
f73dda09 | 446 | if (nr == 0) |
726f6388 JA |
447 | bp->b_flag |= B_EOF; |
448 | else | |
449 | bp->b_flag |= B_ERROR; | |
450 | return (EOF); | |
451 | } | |
f73dda09 JA |
452 | |
453 | #if defined (__CYGWIN__) | |
454 | /* If on cygwin, translate \r\n to \n. */ | |
455 | if (nr >= 2 && bp->b_buffer[nr - 2] == '\r' && bp->b_buffer[nr - 1] == '\n') | |
456 | { | |
457 | bp->b_buffer[nr - 2] = '\n'; | |
458 | nr--; | |
459 | } | |
460 | #endif | |
461 | ||
462 | bp->b_used = nr; | |
726f6388 JA |
463 | bp->b_inputp = 0; |
464 | return (bp->b_buffer[bp->b_inputp++] & 0xFF); | |
465 | } | |
466 | ||
467 | /* Get a character from buffered stream BP. */ | |
468 | #define bufstream_getc(bp) \ | |
469 | (bp->b_inputp == bp->b_used || !bp->b_used) \ | |
470 | ? b_fill_buffer (bp) \ | |
471 | : bp->b_buffer[bp->b_inputp++] & 0xFF | |
472 | ||
473 | /* Push C back onto buffered stream BP. */ | |
474 | static int | |
475 | bufstream_ungetc(c, bp) | |
476 | int c; | |
477 | BUFFERED_STREAM *bp; | |
478 | { | |
479 | if (c == EOF || bp->b_inputp == 0) | |
480 | return (EOF); | |
481 | ||
482 | bp->b_buffer[--bp->b_inputp] = c; | |
483 | return (c); | |
484 | } | |
485 | ||
486 | /* Seek backwards on file BFD to synchronize what we've read so far | |
487 | with the underlying file pointer. */ | |
488 | int | |
489 | sync_buffered_stream (bfd) | |
490 | int bfd; | |
491 | { | |
492 | BUFFERED_STREAM *bp; | |
ccc6cda3 | 493 | off_t chars_left; |
726f6388 | 494 | |
28ef6c31 | 495 | if (buffers == 0 || (bp = buffers[bfd]) == 0) |
726f6388 | 496 | return (-1); |
28ef6c31 | 497 | |
726f6388 JA |
498 | chars_left = bp->b_used - bp->b_inputp; |
499 | if (chars_left) | |
500 | lseek (bp->b_fd, -chars_left, SEEK_CUR); | |
501 | bp->b_used = bp->b_inputp = 0; | |
502 | return (0); | |
503 | } | |
504 | ||
505 | int | |
506 | buffered_getchar () | |
507 | { | |
28ef6c31 | 508 | #if !defined (DJGPP) |
726f6388 | 509 | return (bufstream_getc (buffers[bash_input.location.buffered_fd])); |
28ef6c31 JA |
510 | #else |
511 | /* On DJGPP, ignore \r. */ | |
512 | int ch; | |
513 | while ((ch = bufstream_getc (buffers[bash_input.location.buffered_fd])) == '\r') | |
514 | ; | |
515 | return ch; | |
516 | #endif | |
726f6388 JA |
517 | } |
518 | ||
519 | int | |
520 | buffered_ungetchar (c) | |
521 | int c; | |
522 | { | |
523 | return (bufstream_ungetc (c, buffers[bash_input.location.buffered_fd])); | |
524 | } | |
525 | ||
526 | /* Make input come from file descriptor BFD through a buffered stream. */ | |
527 | void | |
528 | with_input_from_buffered_stream (bfd, name) | |
529 | int bfd; | |
530 | char *name; | |
531 | { | |
532 | INPUT_STREAM location; | |
ccc6cda3 | 533 | BUFFERED_STREAM *bp; |
726f6388 JA |
534 | |
535 | location.buffered_fd = bfd; | |
536 | /* Make sure the buffered stream exists. */ | |
ccc6cda3 JA |
537 | bp = fd_to_buffered_stream (bfd); |
538 | init_yy_io (bp == 0 ? return_EOF : buffered_getchar, | |
539 | buffered_ungetchar, st_bstream, name, location); | |
726f6388 JA |
540 | } |
541 | ||
542 | #if defined (TEST) | |
f73dda09 | 543 | void * |
726f6388 JA |
544 | xmalloc(s) |
545 | int s; | |
546 | { | |
f73dda09 | 547 | return (malloc (s)); |
726f6388 JA |
548 | } |
549 | ||
f73dda09 | 550 | void * |
726f6388 JA |
551 | xrealloc(s, size) |
552 | char *s; | |
553 | int size; | |
554 | { | |
555 | if (!s) | |
f73dda09 | 556 | return(malloc (size)); |
726f6388 | 557 | else |
f73dda09 | 558 | return(realloc (s, size)); |
726f6388 JA |
559 | } |
560 | ||
561 | void | |
562 | init_yy_io () | |
563 | { | |
564 | } | |
565 | ||
566 | process(bp) | |
567 | BUFFERED_STREAM *bp; | |
568 | { | |
569 | int c; | |
570 | ||
571 | while ((c = bufstream_getc(bp)) != EOF) | |
572 | putchar(c); | |
573 | } | |
574 | ||
575 | BASH_INPUT bash_input; | |
576 | ||
577 | struct stat dsb; /* can be used from gdb */ | |
578 | ||
579 | /* imitate /bin/cat */ | |
580 | main(argc, argv) | |
581 | int argc; | |
582 | char **argv; | |
583 | { | |
584 | register int i; | |
585 | BUFFERED_STREAM *bp; | |
586 | ||
587 | if (argc == 1) { | |
588 | bp = fd_to_buffered_stream (0); | |
589 | process(bp); | |
590 | exit(0); | |
591 | } | |
592 | for (i = 1; i < argc; i++) { | |
593 | if (argv[i][0] == '-' && argv[i][1] == '\0') { | |
594 | bp = fd_to_buffered_stream (0); | |
595 | if (!bp) | |
596 | continue; | |
597 | process(bp); | |
598 | free_buffered_stream (bp); | |
599 | } else { | |
600 | bp = open_buffered_stream (argv[i]); | |
601 | if (!bp) | |
602 | continue; | |
603 | process(bp); | |
604 | close_buffered_stream (bp); | |
605 | } | |
606 | } | |
607 | exit(0); | |
608 | } | |
ccc6cda3 JA |
609 | #endif /* TEST */ |
610 | #endif /* BUFFERED_INPUT */ |