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-rw-r--r--coreutils/ln.c79
1 files changed, 56 insertions, 23 deletions
diff --git a/coreutils/ln.c b/coreutils/ln.c
index 60fe394..f20b340 100644
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -22,26 +22,32 @@
*/
#include "internal.h"
+#define BB_DECLARE_EXTERN
+#define bb_need_name_too_long
+#define bb_need_not_a_directory
+#include "messages.c"
+
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
+#include <sys/param.h> /* for PATH_MAX */
-
-static const char ln_usage[] = "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n"
-"Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n"
-"Options:\n"
-"\t-s\tmake symbolic links instead of hard links\n"
-"\t-f\tremove existing destination files\n";
-
+static const char ln_usage[] =
+ "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n"
+ "Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n"
+ "Options:\n"
+ "\t-s\tmake symbolic links instead of hard links\n"
+ "\t-f\tremove existing destination files\n"
+ "\t-n\tno dereference symlinks - treat like normal file\n";
static int symlinkFlag = FALSE;
static int removeoldFlag = FALSE;
-
+static int followLinks = TRUE;
extern int ln_main(int argc, char **argv)
{
- int status;
- static char* linkName;
+ char *linkName;
+ int linkIntoDirFlag;
if (argc < 3) {
usage (ln_usage);
@@ -59,6 +65,9 @@ extern int ln_main(int argc, char **argv)
case 'f':
removeoldFlag = TRUE;
break;
+ case 'n':
+ followLinks = FALSE;
+ break;
default:
usage (ln_usage);
}
@@ -66,30 +75,54 @@ extern int ln_main(int argc, char **argv)
argv++;
}
-
linkName = argv[argc - 1];
- if ((argc > 3) && !(isDirectory(linkName))) {
- fprintf(stderr, "%s: not a directory\n", linkName);
- exit (FALSE);
+ if (strlen(linkName) > PATH_MAX) {
+ fprintf(stderr, name_too_long, "ln");
+ exit FALSE;
+ }
+
+ linkIntoDirFlag = isDirectory(linkName, TRUE);
+
+ if ((argc > 3) && !linkIntoDirFlag) {
+ fprintf(stderr, not_a_directory, "ln", linkName);
+ exit FALSE;
}
while (argc-- >= 2) {
- if (removeoldFlag==TRUE ) {
+ char srcName[PATH_MAX + 1];
+ int nChars, status;
+
+ if (strlen(*argv) > PATH_MAX) {
+ fprintf(stderr, name_too_long, "ln");
+ exit FALSE;
+ }
+
+ if (followLinks == FALSE) {
+ strcpy(srcName, *argv);
+ } else {
+ /* Warning! This can silently truncate if > PATH_MAX, but
+ I don't think that there can be one > PATH_MAX anyway. */
+ nChars = readlink(*argv, srcName, PATH_MAX);
+ srcName[nChars] = '\0';
+ }
+
+ if (removeoldFlag == TRUE) {
status = ( unlink(linkName) && errno != ENOENT );
- if ( status != 0 ) {
+ if (status != 0) {
perror(linkName);
- exit( FALSE);
+ exit FALSE;
}
}
- if ( symlinkFlag==TRUE)
- status = symlink(*argv, linkName);
+
+ if (symlinkFlag == TRUE)
+ status = symlink(*argv, linkName);
else
- status = link(*argv, linkName);
- if ( status != 0 ) {
+ status = link(*argv, linkName);
+ if (status != 0) {
perror(linkName);
- exit( FALSE);
+ exit FALSE;
}
}
- exit( TRUE);
+ exit TRUE;
}