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73561cc75a
Various fixes, cleanups and shrinkage: saves 952 Bytes: text data bss dec hex filename 1087742 15853 790632 1894227 1ce753 ../busybox/busybox.old 1086790 15853 790632 1893275 1ce39b busybox via: # scripts/bloat-o-meter ../busybox/busybox_unstripped.old busybox_unstripped function old new delta ipcrm_main 756 822 +66 getval - 61 +61 maybe_set_utc - 40 +40 udhcpc_main 2896 2912 +16 md5_hash_block 428 437 +9 opt 8 16 +8 qgravechar 106 110 +4 make_bitmap 292 295 +3 inflate_unzip 2056 2059 +3 add_partition 1412 1414 +2 __parsespent 156 158 +2 qrealloc 41 42 +1 format - 1 +1 catv_main 313 314 +1 watch_main 293 292 -1 varunset 81 80 -1 part 1 - -1 check_if_skip 837 836 -1 start_stop_daemon_main 840 837 -3 create_lost_and_found 175 172 -3 supress_non_delimited_lines 4 - -4 static.l 4 - -4 static.c 5 1 -4 bsd_sum_file 237 233 -4 eval2 338 332 -6 arithmetic_common 166 158 -8 cmpfunc 22 5 -17 cksum_main 294 275 -19 cmp_main 465 439 -26 dd_main 1535 1508 -27 rmmod_main 376 333 -43 cut_file 727 644 -83 ipcs_main 3809 3721 -88 cut_main 722 614 -108 date_main 1443 1263 -180 remove_ids 222 - -222 ------------------------------------------------------------------------------ (add/remove: 3/4 grow/shrink: 11/18 up/down: 217/-853) Total: -636 bytes
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* tee implementation for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/tee.html */
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#include "busybox.h"
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#include <signal.h>
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int tee_main(int argc, char **argv)
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{
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const char *mode = "w\0a";
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FILE **files;
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FILE **p;
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char **filenames;
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int flags;
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int retval = EXIT_SUCCESS;
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#ifdef CONFIG_FEATURE_TEE_USE_BLOCK_IO
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ssize_t c;
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# define buf bb_common_bufsiz1
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#else
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int c;
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#endif
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flags = bb_getopt_ulflags(argc, argv, "ia"); /* 'a' must be 2nd */
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mode += (flags & 2); /* Since 'a' is the 2nd option... */
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if (flags & 1) {
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signal(SIGINT, SIG_IGN); /* TODO - switch to sigaction.*/
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}
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/* gnu tee ignores SIGPIPE in case one of the output files is a pipe
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* that doesn't consume all its input. Good idea... */
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signal(SIGPIPE, SIG_IGN); /* TODO - switch to sigaction.*/
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/* Allocate an array of FILE *'s, with one extra for a sentinal. */
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p = files = (FILE **)xmalloc(sizeof(FILE *) * (argc - optind + 2));
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*p = stdout;
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argv += optind - 1;
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filenames = argv - 1;
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*filenames = (char *) bb_msg_standard_input; /* for later */
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goto GOT_NEW_FILE;
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do {
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if ((*p = bb_wfopen(*argv, mode)) == NULL) {
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retval = EXIT_FAILURE;
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continue;
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}
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filenames[(int)(p - files)] = *argv;
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GOT_NEW_FILE:
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setbuf(*p, NULL); /* tee must not buffer output. */
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++p;
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} while (*++argv);
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*p = NULL; /* Store the sentinal value. */
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#ifdef CONFIG_FEATURE_TEE_USE_BLOCK_IO
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while ((c = safe_read(STDIN_FILENO, buf, BUFSIZ)) > 0) {
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for (p=files ; *p ; p++) {
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fwrite(buf, 1, c, *p);
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}
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}
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if (c < 0) { /* Make sure read errors are signaled. */
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retval = EXIT_FAILURE;
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}
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#else
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setvbuf(stdout, NULL, _IONBF, 0);
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while ((c = getchar()) != EOF) {
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for (p=files ; *p ; p++) {
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putc(c, *p);
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}
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}
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#endif
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/* Now we need to check for i/o errors on stdin and the various
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* output files. Since we know that the first entry in the output
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* file table is stdout, we can save one "if ferror" test by
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* setting the first entry to stdin and checking stdout error
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* status with bb_fflush_stdout_and_exit()... although fflush()ing
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* is unnecessary here. */
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p = files;
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*p = stdin;
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do { /* Now check for (input and) output errors. */
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/* Checking ferror should be sufficient, but we may want to fclose.
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* If we do, remember not to close stdin! */
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xferror(*p, filenames[(int)(p - files)]);
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} while (*++p);
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bb_fflush_stdout_and_exit(retval);
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}
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