These messages can be .rodata, so make them even more const.

[oweals/busybox.git] / ln.c

diff --git a/ln.c b/ln.c
index 60fe394386a8a7f7a3441da9e4f6ba8cb0dab6e2..7412a86fd124dd7a581a0227efa03e1d0c231f86 100644 (file)
--- a/ln.c
+++ b/ln.c
@@ -1,8 +1,8 @@
+/* vi: set sw=4 ts=4: */
 /*
  * 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
@@ -21,75 +21,111 @@
  *
  */
 
-#include "internal.h"
 #include <stdio.h>
 #include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
 #include <errno.h>
+#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";
-
-
-static int symlinkFlag = FALSE;
-static int removeoldFlag = FALSE;
+static const int LN_SYMLINK = 1;
+static const int LN_FORCE = 2;
+static const int LN_NODEREFERENCE = 4;
 
-
-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)
 {
-    int status;
-    static char* linkName;
-
-    if (argc < 3) {
-       usage (ln_usage);
-    }
-    argc--;
-    argv++;
+       int status;
+       int src_is_dir;
+       char *src_name;
 
-    /* Parse any options */
-    while (**argv == '-') {
-       while (*++(*argv))
-           switch (**argv) {
-           case 's':
-               symlinkFlag = TRUE;
-               break;
-           case 'f':
-               removeoldFlag = TRUE;
-               break;
-           default:
-               usage (ln_usage);
-           }
-       argc--;
-       argv++;
-    }
+       if (link_destname==NULL)
+               return(FALSE);
 
+       src_name = (char *) xmalloc(strlen(link_srcname)+strlen(link_destname)+1);
 
-    linkName = argv[argc - 1];
+       if (link_srcname==NULL)
+               strcpy(src_name, link_destname);
+       else
+               strcpy(src_name, link_srcname);
 
-    if ((argc > 3) && !(isDirectory(linkName))) {
-       fprintf(stderr, "%s: not a directory\n", linkName);
-       exit (FALSE);
-    }
+       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;
 
-    while (argc-- >= 2) {
-       if (removeoldFlag==TRUE ) {
-           status = ( unlink(linkName) && errno != ENOENT );
-           if ( status != 0 ) {
-               perror(linkName);
-               exit( FALSE);
-           }
+               srcdir_name = xstrdup(link_destname);
+               strcat(src_name, "/");
+               strcat(src_name, get_last_path_component(srcdir_name));
+               free(srcdir_name);
        }
-       if ( symlinkFlag==TRUE)
-               status = symlink(*argv, linkName);
+       
+       if (flag&LN_FORCE)
+               unlink(src_name);
+               
+       if (flag&LN_SYMLINK)
+               status = symlink(link_destname, src_name);
        else
-               status = link(*argv, linkName);
-       if ( status != 0 ) {
-           perror(linkName);
-           exit( FALSE);
+               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 ((opt=getopt(argc, argv, "sfn")) != -1) {
+               switch(opt) {
+                       case 's':
+                               flag |= LN_SYMLINK;
+                               break;
+                       case 'f':
+                               flag |= LN_FORCE;
+                               break;
+                       case 'n':
+                               flag |= LN_NODEREFERENCE;
+                               break;
+                       default:
+                               show_usage();
+               }
+       }
+       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(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:
+*/