*
* 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
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* 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"
-
+//usage:#define tee_trivial_usage
+//usage: "[-ai] [FILE]..."
+//usage:#define tee_full_usage "\n\n"
+//usage: "Copy stdin to each FILE, and also to stdout\n"
+//usage: "\n -a Append to the given FILEs, don't overwrite"
+//usage: "\n -i Ignore interrupt signals (SIGINT)"
+//usage:
+//usage:#define tee_example_usage
+//usage: "$ echo \"Hello\" | tee /tmp/foo\n"
+//usage: "$ cat /tmp/foo\n"
+//usage: "Hello\n"
+
+#include "libbb.h"
+
+int tee_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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
- size_t c;
- RESERVE_CONFIG_BUFFER(buf, BUFSIZ);
+ FILE **fp;
+ char **names;
+ char **np;
+ char retval;
+//TODO: make unconditional
+#if ENABLE_FEATURE_TEE_USE_BLOCK_IO
+ ssize_t c;
+# define buf bb_common_bufsiz1
#else
int c;
#endif
+ retval = getopt32(argv, "ia"); /* 'a' must be 2nd */
+ argc -= optind;
+ argv += optind;
- flags = bb_getopt_ulflags(argc, argv, "ia"); /* 'a' must be 2nd */
-
- mode += (flags & 2); /* Since 'a' is the 2nd option... */
+ mode += (retval & 2); /* Since 'a' is the 2nd option... */
- if (flags & 1) {
- signal(SIGINT, SIG_IGN); /* TODO - switch to sigaction.*/
+ if (retval & 1) {
+ signal(SIGINT, SIG_IGN); /* TODO - switch to sigaction. (why?) */
}
-
+ retval = EXIT_SUCCESS;
/* 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.*/
+ signal(SIGPIPE, SIG_IGN);
- /* 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;
+ /* Allocate an array of FILE *'s, with one extra for a sentinel. */
+ fp = files = xzalloc(sizeof(FILE *) * (argc + 2));
+ np = names = argv - 1;
+ files[0] = stdout;
+ 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 = read(0, buf, BUFSIZ)) != 0) {
- for (p=files ; *p ; p++) {
- fwrite(buf, 1, c, *p);
+ *fp = stdout;
+ if (NOT_LONE_DASH(*argv)) {
+ *fp = fopen_or_warn(*argv, mode);
+ if (*fp == NULL) {
+ retval = EXIT_FAILURE;
+ argv++;
+ continue;
+ }
}
+ *np = *argv++;
+ GOT_NEW_FILE:
+ setbuf(*fp, NULL); /* tee must not buffer output. */
+ fp++;
+ np++;
+ } while (*argv);
+ /* names[0] will be filled later */
+
+#if ENABLE_FEATURE_TEE_USE_BLOCK_IO
+ while ((c = safe_read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
+ fp = files;
+ do
+ fwrite(buf, 1, c, *fp);
+ while (*++fp);
+ }
+ 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);
- }
+ fp = files;
+ do
+ putc(c, *fp);
+ while (*++fp);
}
#endif
* 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
+ * status with fflush_stdout_and_exit()... although fflush()ing
* is unnecessary here. */
-
- p = files;
- *p = stdin;
- do { /* Now check for (input and) output errors. */
+ np = names;
+ fp = files;
+ names[0] = (char *) bb_msg_standard_input;
+ files[0] = 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);
+ die_if_ferror(*fp++, *np++);
+ } while (*fp);
- bb_fflush_stdout_and_exit(retval);
+ fflush_stdout_and_exit(retval);
}
projects / platform / upstream / busybox.git / blobdiff