121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* tee implementation for busybox
|
|
*
|
|
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/* BB_AUDIT SUSv3 compliant */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/tee.html */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include "busybox.h"
|
|
|
|
int tee_main(int argc, char **argv)
|
|
{
|
|
const char *mode = "w\0a";
|
|
FILE **files;
|
|
FILE **p;
|
|
char **filenames;
|
|
int flags;
|
|
int retval = EXIT_SUCCESS;
|
|
#ifdef CONFIG_FEATURE_TEE_USE_BLOCK_IO
|
|
ssize_t c;
|
|
RESERVE_CONFIG_BUFFER(buf, BUFSIZ);
|
|
#else
|
|
int c;
|
|
#endif
|
|
|
|
flags = bb_getopt_ulflags(argc, argv, "ia"); /* 'a' must be 2nd */
|
|
|
|
mode += (flags & 2); /* Since 'a' is the 2nd option... */
|
|
|
|
if (flags & 1) {
|
|
signal(SIGINT, SIG_IGN); /* TODO - switch to sigaction.*/
|
|
}
|
|
|
|
/* gnu tee ignores SIGPIPE in case one of the output files is a pipe
|
|
* that doesn't consume all its input. Good idea... */
|
|
signal(SIGPIPE, SIG_IGN); /* TODO - switch to sigaction.*/
|
|
|
|
/* Allocate an array of FILE *'s, with one extra for a sentinal. */
|
|
p = files = (FILE **)xmalloc(sizeof(FILE *) * (argc - optind + 2));
|
|
*p = stdout;
|
|
argv += optind - 1;
|
|
filenames = argv - 1;
|
|
*filenames = (char *) bb_msg_standard_input; /* for later */
|
|
goto GOT_NEW_FILE;
|
|
|
|
do {
|
|
if ((*p = bb_wfopen(*argv, mode)) == NULL) {
|
|
retval = EXIT_FAILURE;
|
|
continue;
|
|
}
|
|
filenames[(int)(p - files)] = *argv;
|
|
GOT_NEW_FILE:
|
|
setbuf(*p, NULL); /* tee must not buffer output. */
|
|
++p;
|
|
} while (*++argv);
|
|
|
|
*p = NULL; /* Store the sentinal value. */
|
|
|
|
#ifdef CONFIG_FEATURE_TEE_USE_BLOCK_IO
|
|
while ((c = safe_read(STDIN_FILENO, buf, BUFSIZ)) > 0) {
|
|
for (p=files ; *p ; p++) {
|
|
fwrite(buf, 1, c, *p);
|
|
}
|
|
}
|
|
|
|
if (c < 0) { /* Make sure read errors are signaled. */
|
|
retval = EXIT_FAILURE;
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_CLEAN_UP
|
|
RELEASE_CONFIG_BUFFER(buf);
|
|
#endif
|
|
|
|
#else
|
|
setvbuf(stdout, NULL, _IONBF, 0);
|
|
while ((c = getchar()) != EOF) {
|
|
for (p=files ; *p ; p++) {
|
|
putc(c, *p);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Now we need to check for i/o errors on stdin and the various
|
|
* output files. Since we know that the first entry in the output
|
|
* file table is stdout, we can save one "if ferror" test by
|
|
* setting the first entry to stdin and checking stdout error
|
|
* status with bb_fflush_stdout_and_exit()... although fflush()ing
|
|
* is unnecessary here. */
|
|
|
|
p = files;
|
|
*p = stdin;
|
|
do { /* Now check for (input and) output errors. */
|
|
/* Checking ferror should be sufficient, but we may want to fclose.
|
|
* If we do, remember not to close stdin! */
|
|
bb_xferror(*p, filenames[(int)(p - files)]);
|
|
} while (*++p);
|
|
|
|
bb_fflush_stdout_and_exit(retval);
|
|
}
|