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authorMark Whitley2000-10-09 18:56:47 +0000
committerMark Whitley2000-10-09 18:56:47 +0000
commit872138de50b1c5bbf105b0243f5778fcb02b310b (patch)
treebae88fc4587a4d0aa9ec228c1006f4b364d0633e /readlink.c
parent7a86e61a54f75c6c457be177fb20f6dde27c06d3 (diff)
downloadbusybox-872138de50b1c5bbf105b0243f5778fcb02b310b.zip
busybox-872138de50b1c5bbf105b0243f5778fcb02b310b.tar.gz
Added cmp and readlink applets from Matt Kraai.
Diffstat (limited to 'readlink.c')
-rw-r--r--readlink.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/readlink.c b/readlink.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * Mini readlink implementation for busybox
+ *
+ *
+ * Copyright (C) 2000 by Lineo, inc.
+ * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ *
+ * 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
+ *
+ */
+
+#include "busybox.h"
+#include <errno.h>
+#include <unistd.h>
+
+int readlink_main(int argc, char **argv)
+{
+ char *buf = NULL;
+ int bufsize = 128, size = 128;
+
+ if (argc != 2)
+ usage(readlink_usage);
+
+ while (bufsize < size + 1) {
+ bufsize *= 2;
+ buf = xrealloc(buf, bufsize);
+ size = readlink(argv[1], buf, bufsize);
+ if (size == -1)
+ fatalError("%s: %s\n", argv[1], strerror(errno));
+ }
+
+ buf[size] = '\0';
+ puts(buf);
+
+ return EXIT_SUCCESS;
+}