X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fln.c;h=7412a86fd124dd7a581a0227efa03e1d0c231f86;hb=2e6c87876353cf5e038d8430c076f645be51da75;hp=bc51cb0d58cd55584de1f84929d71d63721164f0;hpb=e49d5ecbbe51718fa925b6890a735e5937cc2aa2;p=oweals%2Fbusybox.git

diff --git a/coreutils/ln.c b/coreutils/ln.c
index bc51cb0d5..7412a86fd 100644
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -2,8 +2,7 @@
 /*
  * Mini ln implementation for busybox
  *
- *
- * Copyright (C) 1999 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -22,109 +21,111 @@
  *
  */
 
-#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 <string.h>
+#include <stdlib.h>
 #include <errno.h>
-#include <sys/param.h>			/* for PATH_MAX */
+#include <unistd.h>
+#include "busybox.h"
 
-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 const int LN_SYMLINK = 1;
+static const int LN_FORCE = 2;
+static const int LN_NODEREFERENCE = 4;
 
-static int symlinkFlag = FALSE;
-static int removeoldFlag = FALSE;
-static int followLinks = TRUE;
-
-extern int ln_main(int argc, char **argv)
+/*
+ * linkDestName is where the link points to,
+ * linkSrcName is the name of the link to be created.
+ */
+static int fs_link(const char *link_destname, const char *link_srcname, 
+		const int flag)
 {
-	char *linkName;
-	int linkIntoDirFlag;
-
-	if (argc < 3) {
-		usage(ln_usage);
+	int status;
+	int src_is_dir;
+	char *src_name;
+
+	if (link_destname==NULL)
+		return(FALSE);
+
+	src_name = (char *) xmalloc(strlen(link_srcname)+strlen(link_destname)+1);
+
+	if (link_srcname==NULL)
+		strcpy(src_name, link_destname);
+	else
+		strcpy(src_name, link_srcname);
+
+	if (flag&LN_NODEREFERENCE)
+		src_is_dir = is_directory(src_name, TRUE, NULL);
+	else
+		src_is_dir = is_directory(src_name, FALSE, NULL);	
+	
+	if ((src_is_dir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
+		char* srcdir_name;
+
+		srcdir_name = xstrdup(link_destname);
+		strcat(src_name, "/");
+		strcat(src_name, get_last_path_component(srcdir_name));
+		free(srcdir_name);
 	}
-	argc--;
-	argv++;
+	
+	if (flag&LN_FORCE)
+		unlink(src_name);
+		
+	if (flag&LN_SYMLINK)
+		status = symlink(link_destname, src_name);
+	else
+		status = link(link_destname, src_name);
+
+	if (status != 0) {
+		perror_msg(src_name);
+		return(FALSE);
+	}
+	return(TRUE);
+}
 
+extern int ln_main(int argc, char **argv)
+{
+	int status = EXIT_SUCCESS;
+	int flag = 0;
+	int opt;
+	
 	/* Parse any options */
-	while (**argv == '-') {
-		while (*++(*argv))
-			switch (**argv) {
+	while ((opt=getopt(argc, argv, "sfn")) != -1) {
+		switch(opt) {
 			case 's':
-				symlinkFlag = TRUE;
+				flag |= LN_SYMLINK;
 				break;
 			case 'f':
-				removeoldFlag = TRUE;
+				flag |= LN_FORCE;
 				break;
 			case 'n':
-				followLinks = FALSE;
+				flag |= LN_NODEREFERENCE;
 				break;
 			default:
-				usage(ln_usage);
-			}
-		argc--;
-		argv++;
-	}
-
-	linkName = argv[argc - 1];
-
-	if (strlen(linkName) > PATH_MAX) {
-		fprintf(stderr, name_too_long, "ln");
-		exit FALSE;
+				show_usage();
+		}
 	}
-
-	linkIntoDirFlag = isDirectory(linkName, TRUE);
-
-	if ((argc > 3) && !linkIntoDirFlag) {
-		fprintf(stderr, not_a_directory, "ln", linkName);
-		exit FALSE;
+	if (optind > (argc-1)) {
+		show_usage();
+	} 
+	if (optind == (argc-1)) {
+		if (fs_link(argv[optind], 
+					get_last_path_component(argv[optind]), flag)==FALSE)
+			status = EXIT_FAILURE;
 	}
-
-	while (argc-- >= 2) {
-		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) {
-				perror(linkName);
-				exit FALSE;
-			}
-		}
-
-		if (symlinkFlag == TRUE)
-			status = symlink(*argv, linkName);
-		else
-			status = link(*argv, linkName);
-		if (status != 0) {
-			perror(linkName);
-			exit FALSE;
-		}
+	while(optind<(argc-1)) {
+		if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
+			status = EXIT_FAILURE;
+		optind++;
 	}
-	exit TRUE;
+	exit(status);
 }
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/