*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
- * Licensed under GPLv2, see file License in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
-#include "busybox.h"
+//kbuild:lib-$(CONFIG_CAT) += cat.o
+//kbuild:lib-$(CONFIG_MORE) += cat.o # more uses it if stdout isn't a tty
+//kbuild:lib-$(CONFIG_LESS) += cat.o # less too
+//kbuild:lib-$(CONFIG_CRONTAB) += cat.o # crontab -l
+
+//config:config CAT
+//config: bool "cat"
+//config: default y
+//config: help
+//config: cat is used to concatenate files and print them to the standard
+//config: output. Enable this option if you wish to enable the 'cat' utility.
+
+//usage:#define cat_trivial_usage
+//usage: "[FILE]..."
+//usage:#define cat_full_usage "\n\n"
+//usage: "Concatenate FILEs and print them to stdout"
+//usage:
+//usage:#define cat_example_usage
+//usage: "$ cat /proc/uptime\n"
+//usage: "110716.72 17.67"
+
+#include "libbb.h"
+
+/* This is a NOFORK applet. Be very careful! */
+
int bb_cat(char **argv)
{
- static char *const argv_dash[] = { "-", NULL };
- FILE *f;
+ int fd;
int retval = EXIT_SUCCESS;
- if (!*argv) argv = (char**) &argv_dash;
+ if (!*argv)
+ argv = (char**) &bb_argv_dash;
do {
- f = fopen_or_warn_stdin(*argv);
- if (f) {
- off_t r = bb_copyfd_eof(fileno(f), STDOUT_FILENO);
- fclose_if_not_stdin(f);
+ fd = open_or_warn_stdin(*argv);
+ if (fd >= 0) {
+ /* This is not a xfunc - never exits */
+ off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
+ if (fd != STDIN_FILENO)
+ close(fd);
if (r >= 0)
continue;
}
return retval;
}
-int cat_main(int argc, char **argv)
+int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int cat_main(int argc UNUSED_PARAM, char **argv)
{
- getopt32(argc, argv, "u");
+ getopt32(argv, "u");
argv += optind;
return bb_cat(argv);
}