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-rw-r--r--toys/ln.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/toys/ln.c b/toys/ln.c
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+/* vi: set sw=4 ts=4:
+ *
+ * ln.c - Create filesystem links
+ *
+ * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ln.html
+
+USE_LN(NEWTOY(ln, "fs", TOYFLAG_BIN))
+
+config LN
+ bool "ln"
+ default n
+ help
+ usage: ln [-s] [-f] file1 file2
+
+ Create a link from file2 to file1
+
+ -s Create a symbolic link
+ -f Force the creation of the link, even if file2 already exists
+*/
+
+#include "toys.h"
+
+#define FLAG_s 1
+#define FLAG_f 2
+
+void ln_main(void)
+{
+ char *file1 = toys.optargs[0], *file2 = toys.optargs[1];
+
+ /* FIXME: How do we print out the usage info? */
+ if (!file1 || !file2)
+ perror_exit("Usage: ln [-s] [-f] file1 file2");
+ /* Silently unlink the existing target. If it doesn't exist,
+ * then we just move on */
+ if (toys.optflags & FLAG_f)
+ unlink(file2);
+ if (toys.optflags & FLAG_s) {
+ if (symlink(file1, file2))
+ perror_exit("cannot create symbolic link from %s to %s",
+ file1, file2);
+ } else {
+ if (link(file1, file2))
+ perror_exit("cannot create hard link from %s to %s",
+ file1, file2);
+ }
+}