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-rw-r--r--toys/ln.c63
1 files changed, 41 insertions, 22 deletions
diff --git a/toys/ln.c b/toys/ln.c
index 9dd413f5..856db47b 100644
--- a/toys/ln.c
+++ b/toys/ln.c
@@ -6,18 +6,19 @@
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ln.html
-USE_LN(NEWTOY(ln, "fs", TOYFLAG_BIN))
+USE_LN(NEWTOY(ln, "<1fs", TOYFLAG_BIN))
config LN
bool "ln"
- default n
+ default y
help
- usage: ln [-s] [-f] file1 file2
+ usage: ln [-sf] [FROM...] TO
- Create a link from file2 to file1
+ Create a link between FROM and TO.
+ With only one argument, create link in current directory.
-s Create a symbolic link
- -f Force the creation of the link, even if file2 already exists
+ -f Force the creation of the link, even if TO already exists
*/
#include "toys.h"
@@ -27,22 +28,40 @@ config LN
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);
+ char *dest = toys.optargs[--toys.optc], *new;
+ struct stat buf;
+ int i;
+
+ // With one argument, create link in current directory.
+ if (!toys.optc) {
+ toys.optc++;
+ dest=".";
+ }
+
+ // Is destination a directory?
+ if (stat(dest, &buf) || !S_ISDIR(buf.st_mode)) {
+ if (toys.optc>1) error_exit("'%s' not a directory");
+ buf.st_mode = 0;
+ }
+
+ for (i=0; i<toys.optc; i++) {
+ int rc;
+ char *try = toys.optargs[i];
+
+ if (S_ISDIR(buf.st_mode)) {
+ new = strrchr(try, '/');
+ if (!new) new = try;
+ new = xmsprintf("%s/%s", dest, new);
+ } else new = dest;
+ /* Silently unlink the existing target. If it doesn't exist,
+ * then we just move on */
+ if (toys.optflags & FLAG_f) unlink(new);
+
+
+ rc = (toys.optflags & FLAG_s) ? symlink(try, new) : link(try, new);
+ if (rc)
+ perror_exit("cannot create %s link from '%s' to '%s'",
+ (toys.optflags & FLAG_s) ? "symbolic" : "hard", try, new);
+ if (new != dest) free(new);
}
}