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Commit | Line | Data |
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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" |
5e13499c CR |
37 | #include "bashintl.h" |
38 | ||
726f6388 JA |
39 | #include "command.h" |
40 | #include "general.h" | |
41 | #include "input.h" | |
ccc6cda3 JA |
42 | #include "error.h" |
43 | #include "externs.h" | |
726f6388 JA |
44 | |
45 | #if !defined (errno) | |
46 | extern int errno; | |
47 | #endif /* !errno */ | |
48 | ||
ccc6cda3 JA |
49 | /* Functions to handle reading input on systems that don't restart read(2) |
50 | if a signal is received. */ | |
51 | ||
f73dda09 | 52 | static char localbuf[128]; |
ccc6cda3 JA |
53 | static int local_index, local_bufused; |
54 | ||
55 | /* Posix and USG systems do not guarantee to restart read () if it is | |
56 | interrupted by a signal. We do the read ourselves, and restart it | |
57 | if it returns EINTR. */ | |
58 | int | |
59 | getc_with_restart (stream) | |
60 | FILE *stream; | |
61 | { | |
f73dda09 JA |
62 | unsigned char uc; |
63 | ||
ccc6cda3 JA |
64 | /* Try local buffering to reduce the number of read(2) calls. */ |
65 | if (local_index == local_bufused || local_bufused == 0) | |
66 | { | |
67 | while (1) | |
68 | { | |
69 | local_bufused = read (fileno (stream), localbuf, sizeof(localbuf)); | |
70 | if (local_bufused > 0) | |
71 | break; | |
72 | else if (local_bufused == 0 || errno != EINTR) | |
73 | { | |
74 | local_index = 0; | |
75 | return EOF; | |
76 | } | |
77 | } | |
78 | local_index = 0; | |
79 | } | |
f73dda09 JA |
80 | uc = localbuf[local_index++]; |
81 | return uc; | |
ccc6cda3 JA |
82 | } |
83 | ||
84 | int | |
85 | ungetc_with_restart (c, stream) | |
86 | int c; | |
87 | FILE *stream; | |
88 | { | |
89 | if (local_index == 0 || c == EOF) | |
90 | return EOF; | |
f73dda09 JA |
91 | localbuf[--local_index] = c; |
92 | return c; | |
ccc6cda3 | 93 | } |
ccc6cda3 JA |
94 | |
95 | #if defined (BUFFERED_INPUT) | |
96 | ||
97 | /* A facility similar to stdio, but input-only. */ | |
98 | ||
bb70624e JA |
99 | #if defined (USING_BASH_MALLOC) |
100 | # define MAX_INPUT_BUFFER_SIZE 8176 | |
101 | #else | |
102 | # define MAX_INPUT_BUFFER_SIZE 8192 | |
103 | #endif | |
726f6388 JA |
104 | |
105 | #if !defined (SEEK_CUR) | |
106 | # define SEEK_CUR 1 | |
107 | #endif /* !SEEK_CUR */ | |
108 | ||
28ef6c31 JA |
109 | #ifdef max |
110 | # undef max | |
111 | #endif | |
112 | #define max(a, b) (((a) > (b)) ? (a) : (b)) | |
113 | #ifdef min | |
114 | # undef min | |
115 | #endif | |
116 | #define min(a, b) ((a) > (b) ? (b) : (a)) | |
117 | ||
726f6388 JA |
118 | extern int interactive_shell; |
119 | ||
120 | int bash_input_fd_changed; | |
ccc6cda3 | 121 | |
726f6388 JA |
122 | /* This provides a way to map from a file descriptor to the buffer |
123 | associated with that file descriptor, rather than just the other | |
124 | way around. This is needed so that buffers are managed properly | |
125 | in constructs like 3<&4. buffers[x]->b_fd == x -- that is how the | |
126 | correspondence is maintained. */ | |
cce855bc | 127 | static BUFFERED_STREAM **buffers = (BUFFERED_STREAM **)NULL; |
ccc6cda3 | 128 | static int nbuffers; |
726f6388 | 129 | |
726f6388 JA |
130 | #define ALLOCATE_BUFFERS(n) \ |
131 | do { if ((n) >= nbuffers) allocate_buffers (n); } while (0) | |
132 | ||
133 | /* Make sure `buffers' has at least N elements. */ | |
134 | static void | |
135 | allocate_buffers (n) | |
136 | int n; | |
137 | { | |
138 | register int i, orig_nbuffers; | |
139 | ||
140 | orig_nbuffers = nbuffers; | |
141 | nbuffers = n + 20; | |
142 | buffers = (BUFFERED_STREAM **)xrealloc | |
143 | (buffers, nbuffers * sizeof (BUFFERED_STREAM *)); | |
144 | ||
145 | /* Zero out the new buffers. */ | |
146 | for (i = orig_nbuffers; i < nbuffers; i++) | |
147 | buffers[i] = (BUFFERED_STREAM *)NULL; | |
148 | } | |
149 | ||
150 | /* Construct and return a BUFFERED_STREAM corresponding to file descriptor | |
151 | FD, using BUFFER. */ | |
152 | static BUFFERED_STREAM * | |
153 | make_buffered_stream (fd, buffer, bufsize) | |
154 | int fd; | |
155 | char *buffer; | |
cce855bc | 156 | size_t bufsize; |
726f6388 JA |
157 | { |
158 | BUFFERED_STREAM *bp; | |
159 | ||
160 | bp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM)); | |
161 | ALLOCATE_BUFFERS (fd); | |
162 | buffers[fd] = bp; | |
163 | bp->b_fd = fd; | |
164 | bp->b_buffer = buffer; | |
165 | bp->b_size = bufsize; | |
ccc6cda3 | 166 | bp->b_used = bp->b_inputp = bp->b_flag = 0; |
726f6388 JA |
167 | if (bufsize == 1) |
168 | bp->b_flag |= B_UNBUFF; | |
169 | return (bp); | |
170 | } | |
171 | ||
172 | /* Allocate a new BUFFERED_STREAM, copy BP to it, and return the new copy. */ | |
173 | static BUFFERED_STREAM * | |
174 | copy_buffered_stream (bp) | |
175 | BUFFERED_STREAM *bp; | |
176 | { | |
177 | BUFFERED_STREAM *nbp; | |
178 | ||
179 | if (!bp) | |
180 | return ((BUFFERED_STREAM *)NULL); | |
181 | ||
182 | nbp = (BUFFERED_STREAM *)xmalloc (sizeof (BUFFERED_STREAM)); | |
183 | xbcopy ((char *)bp, (char *)nbp, sizeof (BUFFERED_STREAM)); | |
184 | return (nbp); | |
185 | } | |
186 | ||
28ef6c31 JA |
187 | int |
188 | set_bash_input_fd (fd) | |
189 | int fd; | |
190 | { | |
191 | if (bash_input.type == st_bstream) | |
192 | bash_input.location.buffered_fd = fd; | |
193 | else if (interactive_shell == 0) | |
194 | default_buffered_input = fd; | |
195 | return 0; | |
196 | } | |
197 | ||
198 | int | |
199 | fd_is_bash_input (fd) | |
200 | int fd; | |
201 | { | |
202 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd == fd) | |
203 | return 1; | |
204 | else if (interactive_shell == 0 && default_buffered_input == fd) | |
205 | return 1; | |
206 | return 0; | |
207 | } | |
208 | ||
209 | /* Save the buffered stream corresponding to file descriptor FD (which bash | |
210 | is using to read input) to a buffered stream associated with NEW_FD. If | |
211 | NEW_FD is -1, a new file descriptor is allocated with fcntl. The new | |
212 | file descriptor is returned on success, -1 on error. */ | |
213 | int | |
214 | save_bash_input (fd, new_fd) | |
215 | int fd, new_fd; | |
216 | { | |
217 | int nfd; | |
218 | ||
219 | /* Sync the stream so we can re-read from the new file descriptor. We | |
220 | might be able to avoid this by copying the buffered stream verbatim | |
221 | to the new file descriptor. */ | |
222 | if (buffers[fd]) | |
223 | sync_buffered_stream (fd); | |
224 | ||
225 | /* Now take care of duplicating the file descriptor that bash is | |
226 | using for input, so we can reinitialize it later. */ | |
227 | nfd = (new_fd == -1) ? fcntl (fd, F_DUPFD, 10) : new_fd; | |
228 | if (nfd == -1) | |
229 | { | |
230 | if (fcntl (fd, F_GETFD, 0) == 0) | |
5e13499c | 231 | sys_error (_("cannot allocate new file descriptor for bash input from fd %d"), fd); |
28ef6c31 JA |
232 | return -1; |
233 | } | |
234 | ||
235 | if (buffers[nfd]) | |
236 | { | |
237 | /* What's this? A stray buffer without an associated open file | |
238 | descriptor? Free up the buffer and report the error. */ | |
5e13499c | 239 | internal_error (_("save_bash_input: buffer already exists for new fd %d"), nfd); |
28ef6c31 JA |
240 | free_buffered_stream (buffers[nfd]); |
241 | } | |
242 | ||
243 | /* Reinitialize bash_input.location. */ | |
244 | if (bash_input.type == st_bstream) | |
245 | { | |
246 | bash_input.location.buffered_fd = nfd; | |
247 | fd_to_buffered_stream (nfd); | |
248 | close_buffered_fd (fd); /* XXX */ | |
249 | } | |
250 | else | |
251 | /* If the current input type is not a buffered stream, but the shell | |
252 | is not interactive and therefore using a buffered stream to read | |
253 | input (e.g. with an `eval exec 3>output' inside a script), note | |
254 | that the input fd has been changed. pop_stream() looks at this | |
255 | value and adjusts the input fd to the new value of | |
256 | default_buffered_input accordingly. */ | |
257 | bash_input_fd_changed++; | |
258 | ||
259 | if (default_buffered_input == fd) | |
260 | default_buffered_input = nfd; | |
261 | ||
262 | SET_CLOSE_ON_EXEC (nfd); | |
263 | return nfd; | |
264 | } | |
265 | ||
726f6388 JA |
266 | /* Check that file descriptor FD is not the one that bash is currently |
267 | using to read input from a script. FD is about to be duplicated onto, | |
268 | which means that the kernel will close it for us. If FD is the bash | |
269 | input file descriptor, we need to seek backwards in the script (if | |
270 | possible and necessary -- scripts read from stdin are still unbuffered), | |
271 | allocate a new file descriptor to use for bash input, and re-initialize | |
28ef6c31 JA |
272 | the buffered stream. Make sure the file descriptor used to save bash |
273 | input is set close-on-exec. Returns 0 on success, -1 on failure. This | |
274 | works only if fd is > 0 -- if fd == 0 and bash is reading input from | |
275 | fd 0, save_bash_input is used instead, to cooperate with input | |
276 | redirection (look at redir.c:add_undo_redirect()). */ | |
726f6388 JA |
277 | int |
278 | check_bash_input (fd) | |
279 | int fd; | |
280 | { | |
d3a24ed2 CR |
281 | if (fd_is_bash_input (fd)) |
282 | { | |
283 | if (fd > 0) | |
284 | return ((save_bash_input (fd, -1) == -1) ? -1 : 0); | |
285 | else if (fd == 0) | |
286 | return ((sync_buffered_stream (fd) == -1) ? -1 : 0); | |
287 | } | |
726f6388 JA |
288 | return 0; |
289 | } | |
290 | ||
291 | /* This is the buffered stream analogue of dup2(fd1, fd2). The | |
292 | BUFFERED_STREAM corresponding to fd2 is deallocated, if one exists. | |
293 | BUFFERS[fd1] is copied to BUFFERS[fd2]. This is called by the | |
294 | redirect code for constructs like 4<&0 and 3</etc/rc.local. */ | |
ccc6cda3 | 295 | int |
726f6388 JA |
296 | duplicate_buffered_stream (fd1, fd2) |
297 | int fd1, fd2; | |
298 | { | |
299 | int is_bash_input, m; | |
300 | ||
301 | if (fd1 == fd2) | |
302 | return 0; | |
303 | ||
304 | m = max (fd1, fd2); | |
305 | ALLOCATE_BUFFERS (m); | |
306 | ||
307 | /* If FD2 is the file descriptor bash is currently using for shell input, | |
308 | we need to do some extra work to make sure that the buffered stream | |
309 | actually exists (it might not if fd1 was not active, and the copy | |
310 | didn't actually do anything). */ | |
311 | is_bash_input = (bash_input.type == st_bstream) && | |
312 | (bash_input.location.buffered_fd == fd2); | |
313 | ||
314 | if (buffers[fd2]) | |
315 | free_buffered_stream (buffers[fd2]); | |
316 | buffers[fd2] = copy_buffered_stream (buffers[fd1]); | |
317 | if (buffers[fd2]) | |
318 | buffers[fd2]->b_fd = fd2; | |
319 | ||
28ef6c31 JA |
320 | if (is_bash_input) |
321 | { | |
322 | if (!buffers[fd2]) | |
323 | fd_to_buffered_stream (fd2); | |
324 | buffers[fd2]->b_flag |= B_WASBASHINPUT; | |
325 | } | |
ccc6cda3 | 326 | |
726f6388 JA |
327 | return (fd2); |
328 | } | |
329 | ||
330 | /* Return 1 if a seek on FD will succeed. */ | |
28ef6c31 | 331 | #ifndef __CYGWIN__ |
cce855bc JA |
332 | # define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0) |
333 | #else | |
334 | # define fd_is_seekable(fd) 0 | |
28ef6c31 | 335 | #endif /* __CYGWIN__ */ |
726f6388 JA |
336 | |
337 | /* Take FD, a file descriptor, and create and return a buffered stream | |
338 | corresponding to it. If something is wrong and the file descriptor | |
339 | is invalid, return a NULL stream. */ | |
340 | BUFFERED_STREAM * | |
341 | fd_to_buffered_stream (fd) | |
342 | int fd; | |
343 | { | |
344 | char *buffer; | |
cce855bc | 345 | size_t size; |
726f6388 JA |
346 | struct stat sb; |
347 | ||
348 | if (fstat (fd, &sb) < 0) | |
349 | { | |
350 | close (fd); | |
351 | return ((BUFFERED_STREAM *)NULL); | |
352 | } | |
353 | ||
28ef6c31 JA |
354 | size = (fd_is_seekable (fd)) ? min (sb.st_size, MAX_INPUT_BUFFER_SIZE) : 1; |
355 | if (size == 0) | |
726f6388 | 356 | size = 1; |
726f6388 JA |
357 | buffer = (char *)xmalloc (size); |
358 | ||
359 | return (make_buffered_stream (fd, buffer, size)); | |
360 | } | |
361 | ||
362 | /* Return a buffered stream corresponding to FILE, a file name. */ | |
363 | BUFFERED_STREAM * | |
364 | open_buffered_stream (file) | |
365 | char *file; | |
366 | { | |
367 | int fd; | |
368 | ||
369 | fd = open (file, O_RDONLY); | |
ccc6cda3 | 370 | return ((fd >= 0) ? fd_to_buffered_stream (fd) : (BUFFERED_STREAM *)NULL); |
726f6388 JA |
371 | } |
372 | ||
373 | /* Deallocate a buffered stream and free up its resources. Make sure we | |
374 | zero out the slot in BUFFERS that points to BP. */ | |
375 | void | |
376 | free_buffered_stream (bp) | |
377 | BUFFERED_STREAM *bp; | |
378 | { | |
379 | int n; | |
380 | ||
381 | if (!bp) | |
382 | return; | |
383 | ||
384 | n = bp->b_fd; | |
385 | if (bp->b_buffer) | |
386 | free (bp->b_buffer); | |
387 | free (bp); | |
388 | buffers[n] = (BUFFERED_STREAM *)NULL; | |
389 | } | |
390 | ||
391 | /* Close the file descriptor associated with BP, a buffered stream, and free | |
392 | up the stream. Return the status of closing BP's file descriptor. */ | |
393 | int | |
394 | close_buffered_stream (bp) | |
395 | BUFFERED_STREAM *bp; | |
396 | { | |
397 | int fd; | |
398 | ||
399 | if (!bp) | |
400 | return (0); | |
401 | fd = bp->b_fd; | |
402 | free_buffered_stream (bp); | |
403 | return (close (fd)); | |
404 | } | |
405 | ||
406 | /* Deallocate the buffered stream associated with file descriptor FD, and | |
407 | close FD. Return the status of the close on FD. */ | |
408 | int | |
409 | close_buffered_fd (fd) | |
410 | int fd; | |
411 | { | |
f73dda09 JA |
412 | if (fd < 0) |
413 | { | |
414 | errno = EBADF; | |
415 | return -1; | |
416 | } | |
726f6388 JA |
417 | if (fd >= nbuffers || !buffers || !buffers[fd]) |
418 | return (close (fd)); | |
419 | return (close_buffered_stream (buffers[fd])); | |
420 | } | |
421 | ||
cce855bc JA |
422 | /* Make the BUFFERED_STREAM associcated with buffers[FD] be BP, and return |
423 | the old BUFFERED_STREAM. */ | |
424 | BUFFERED_STREAM * | |
425 | set_buffered_stream (fd, bp) | |
426 | int fd; | |
427 | BUFFERED_STREAM *bp; | |
428 | { | |
429 | BUFFERED_STREAM *ret; | |
430 | ||
431 | ret = buffers[fd]; | |
432 | buffers[fd] = bp; | |
433 | return ret; | |
434 | } | |
435 | ||
726f6388 JA |
436 | /* Read a buffer full of characters from BP, a buffered stream. */ |
437 | static int | |
438 | b_fill_buffer (bp) | |
439 | BUFFERED_STREAM *bp; | |
440 | { | |
f73dda09 JA |
441 | ssize_t nr; |
442 | ||
443 | nr = zread (bp->b_fd, bp->b_buffer, bp->b_size); | |
444 | if (nr <= 0) | |
726f6388 | 445 | { |
f73dda09 | 446 | bp->b_used = 0; |
726f6388 | 447 | bp->b_buffer[0] = 0; |
f73dda09 | 448 | if (nr == 0) |
726f6388 JA |
449 | bp->b_flag |= B_EOF; |
450 | else | |
451 | bp->b_flag |= B_ERROR; | |
452 | return (EOF); | |
453 | } | |
f73dda09 JA |
454 | |
455 | #if defined (__CYGWIN__) | |
456 | /* If on cygwin, translate \r\n to \n. */ | |
457 | if (nr >= 2 && bp->b_buffer[nr - 2] == '\r' && bp->b_buffer[nr - 1] == '\n') | |
458 | { | |
459 | bp->b_buffer[nr - 2] = '\n'; | |
460 | nr--; | |
461 | } | |
462 | #endif | |
463 | ||
464 | bp->b_used = nr; | |
726f6388 JA |
465 | bp->b_inputp = 0; |
466 | return (bp->b_buffer[bp->b_inputp++] & 0xFF); | |
467 | } | |
468 | ||
469 | /* Get a character from buffered stream BP. */ | |
470 | #define bufstream_getc(bp) \ | |
471 | (bp->b_inputp == bp->b_used || !bp->b_used) \ | |
472 | ? b_fill_buffer (bp) \ | |
473 | : bp->b_buffer[bp->b_inputp++] & 0xFF | |
474 | ||
475 | /* Push C back onto buffered stream BP. */ | |
476 | static int | |
477 | bufstream_ungetc(c, bp) | |
478 | int c; | |
479 | BUFFERED_STREAM *bp; | |
480 | { | |
481 | if (c == EOF || bp->b_inputp == 0) | |
482 | return (EOF); | |
483 | ||
484 | bp->b_buffer[--bp->b_inputp] = c; | |
485 | return (c); | |
486 | } | |
487 | ||
488 | /* Seek backwards on file BFD to synchronize what we've read so far | |
489 | with the underlying file pointer. */ | |
490 | int | |
491 | sync_buffered_stream (bfd) | |
492 | int bfd; | |
493 | { | |
494 | BUFFERED_STREAM *bp; | |
ccc6cda3 | 495 | off_t chars_left; |
726f6388 | 496 | |
28ef6c31 | 497 | if (buffers == 0 || (bp = buffers[bfd]) == 0) |
726f6388 | 498 | return (-1); |
28ef6c31 | 499 | |
726f6388 JA |
500 | chars_left = bp->b_used - bp->b_inputp; |
501 | if (chars_left) | |
502 | lseek (bp->b_fd, -chars_left, SEEK_CUR); | |
503 | bp->b_used = bp->b_inputp = 0; | |
504 | return (0); | |
505 | } | |
506 | ||
507 | int | |
508 | buffered_getchar () | |
509 | { | |
28ef6c31 | 510 | #if !defined (DJGPP) |
726f6388 | 511 | return (bufstream_getc (buffers[bash_input.location.buffered_fd])); |
28ef6c31 JA |
512 | #else |
513 | /* On DJGPP, ignore \r. */ | |
514 | int ch; | |
515 | while ((ch = bufstream_getc (buffers[bash_input.location.buffered_fd])) == '\r') | |
516 | ; | |
517 | return ch; | |
518 | #endif | |
726f6388 JA |
519 | } |
520 | ||
521 | int | |
522 | buffered_ungetchar (c) | |
523 | int c; | |
524 | { | |
525 | return (bufstream_ungetc (c, buffers[bash_input.location.buffered_fd])); | |
526 | } | |
527 | ||
528 | /* Make input come from file descriptor BFD through a buffered stream. */ | |
529 | void | |
530 | with_input_from_buffered_stream (bfd, name) | |
531 | int bfd; | |
532 | char *name; | |
533 | { | |
534 | INPUT_STREAM location; | |
ccc6cda3 | 535 | BUFFERED_STREAM *bp; |
726f6388 JA |
536 | |
537 | location.buffered_fd = bfd; | |
538 | /* Make sure the buffered stream exists. */ | |
ccc6cda3 JA |
539 | bp = fd_to_buffered_stream (bfd); |
540 | init_yy_io (bp == 0 ? return_EOF : buffered_getchar, | |
541 | buffered_ungetchar, st_bstream, name, location); | |
726f6388 JA |
542 | } |
543 | ||
544 | #if defined (TEST) | |
f73dda09 | 545 | void * |
726f6388 JA |
546 | xmalloc(s) |
547 | int s; | |
548 | { | |
f73dda09 | 549 | return (malloc (s)); |
726f6388 JA |
550 | } |
551 | ||
f73dda09 | 552 | void * |
726f6388 JA |
553 | xrealloc(s, size) |
554 | char *s; | |
555 | int size; | |
556 | { | |
557 | if (!s) | |
f73dda09 | 558 | return(malloc (size)); |
726f6388 | 559 | else |
f73dda09 | 560 | return(realloc (s, size)); |
726f6388 JA |
561 | } |
562 | ||
563 | void | |
564 | init_yy_io () | |
565 | { | |
566 | } | |
567 | ||
568 | process(bp) | |
569 | BUFFERED_STREAM *bp; | |
570 | { | |
571 | int c; | |
572 | ||
573 | while ((c = bufstream_getc(bp)) != EOF) | |
574 | putchar(c); | |
575 | } | |
576 | ||
577 | BASH_INPUT bash_input; | |
578 | ||
579 | struct stat dsb; /* can be used from gdb */ | |
580 | ||
581 | /* imitate /bin/cat */ | |
582 | main(argc, argv) | |
583 | int argc; | |
584 | char **argv; | |
585 | { | |
586 | register int i; | |
587 | BUFFERED_STREAM *bp; | |
588 | ||
589 | if (argc == 1) { | |
590 | bp = fd_to_buffered_stream (0); | |
591 | process(bp); | |
592 | exit(0); | |
593 | } | |
594 | for (i = 1; i < argc; i++) { | |
595 | if (argv[i][0] == '-' && argv[i][1] == '\0') { | |
596 | bp = fd_to_buffered_stream (0); | |
597 | if (!bp) | |
598 | continue; | |
599 | process(bp); | |
600 | free_buffered_stream (bp); | |
601 | } else { | |
602 | bp = open_buffered_stream (argv[i]); | |
603 | if (!bp) | |
604 | continue; | |
605 | process(bp); | |
606 | close_buffered_stream (bp); | |
607 | } | |
608 | } | |
609 | exit(0); | |
610 | } | |
ccc6cda3 JA |
611 | #endif /* TEST */ |
612 | #endif /* BUFFERED_INPUT */ |