Bump to version 1.22.1

[platform/upstream/busybox.git] / coreutils / cat.c

diff --git a/coreutils/cat.c b/coreutils/cat.c
index da91d1d..00c38d4 100644 (file)
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -1,62 +1,69 @@
+/* vi: set sw=4 ts=4: */
 /*
- * Mini Cat implementation for busybox
+ * cat implementation for busybox
  *
- * Copyright (C) 1999 by Lineo, inc.
- * Written by Erik Andersen <andersee@lineo.com>, <andersee@debian.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
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
  *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
-#include "internal.h"
-#include <stdio.h>
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
+
+//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"
 
-static void print_file( FILE *file) 
+/* This is a NOFORK applet. Be very careful! */
+
+
+int bb_cat(char **argv)
 {
-    int c;
-    while ((c = getc(file)) != EOF)
-       putc(c, stdout);
-    fclose(file);
-    fflush(stdout);
+       int fd;
+       int retval = EXIT_SUCCESS;
+
+       if (!*argv)
+               argv = (char**) &bb_argv_dash;
+
+       do {
+               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;
+               }
+               retval = EXIT_FAILURE;
+       } while (*++argv);
+
+       return retval;
 }
 
-extern 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)
 {
-    FILE *file;
-
-    if (argc==1) {
-       print_file( stdin);
-       exit( TRUE);
-    }
-
-    if ( **(argv+1) == '-' ) {
-       usage ("cat [file ...]\n");
-    }
-    argc--;
-    argv++;
-
-    while (argc-- > 0) {
-       file = fopen(*argv, "r");
-       if (file == NULL) {
-           perror(*argv);
-           exit(FALSE);
-       }
-       print_file( file);
-       argc--;
-       argv++;
-    }
-    exit(TRUE);
+       getopt32(argv, "u");
+       argv += optind;
+       return bb_cat(argv);
 }