*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * 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 "busybox.h"
-#include <signal.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 **fp;
char **names;
char **np;
- int flags;
- int retval = EXIT_SUCCESS;
+ char retval;
+//TODO: make unconditional
#if ENABLE_FEATURE_TEE_USE_BLOCK_IO
ssize_t c;
# define buf bb_common_bufsiz1
#else
int c;
#endif
- flags = getopt32(argc, argv, "ia"); /* 'a' must be 2nd */
+ retval = getopt32(argv, "ia"); /* 'a' must be 2nd */
argc -= optind;
argv += optind;
- 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. */
+ /* 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 {
- *fp = fopen_or_warn(*argv, mode);
- if (*fp == NULL) {
- retval = EXIT_FAILURE;
- continue;
+ *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. */
+ 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, BUFSIZ)) > 0) {
+ while ((c = safe_read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
fp = files;
do
- fwrite(buf, 1, c, *fp++);
- while (*fp);
+ fwrite(buf, 1, c, *fp);
+ while (*++fp);
}
if (c < 0) { /* Make sure read errors are signaled. */
retval = EXIT_FAILURE;
while ((c = getchar()) != EOF) {
fp = files;
do
- putc(c, *fp++);
- while (*fp);
+ putc(c, *fp);
+ while (*++fp);
}
#endif