Remove #ifdef __STDC__ junk. We don't do K&R round these parts,

[oweals/busybox.git] / coreutils / ln.c

diff --git a/coreutils/ln.c b/coreutils/ln.c
index f20b340eac1498570f872711e98aa6614e6033b2..e81dbafaec49667f99cb70187ad8d7202928a466 100644 (file)
--- a/coreutils/ln.c
+++ b/coreutils/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 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
@@ -21,108 +21,98 @@
  *
  */
 
-#include "internal.h"
+#include "busybox.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"
-    "\t-n\tno dereference symlinks - treat like normal file\n";
 
-static int symlinkFlag = FALSE;
-static int removeoldFlag = FALSE;
-static int followLinks = TRUE;
+#define LN_SYMLINK             1
+#define LN_FORCE                       2
+#define 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)
 {
-    char *linkName;
-    int linkIntoDirFlag;
-
-    if (argc < 3) {
-       usage (ln_usage);
-    }
-    argc--;
-    argv++;
+       int status;
+       int srcIsDir;
+       char *srcName;
 
-    /* Parse any options */
-    while (**argv == '-') {
-       while (*++(*argv))
-           switch (**argv) {
-           case 's':
-               symlinkFlag = TRUE;
-               break;
-           case 'f':
-               removeoldFlag = TRUE;
-               break;
-           case 'n':
-               followLinks = FALSE;
-               break;
-           default:
-               usage (ln_usage);
-           }
-       argc--;
-       argv++;
-    }
+       if (link_DestName==NULL)
+               return(FALSE);
 
-    linkName = argv[argc - 1];
+       srcName = (char *) malloc(strlen(link_SrcName)+strlen(link_DestName)+1);
 
-    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) {
-       char srcName[PATH_MAX + 1];
-       int nChars, status;
+       if (link_SrcName==NULL)
+               strcpy(srcName, link_DestName);
+       else
+               strcpy(srcName, link_SrcName);
 
-       if (strlen(*argv) > PATH_MAX) {
-           fprintf(stderr, name_too_long, "ln");
-           exit FALSE;
+       if (flag&LN_NODEREFERENCE)
+               srcIsDir = isDirectory(srcName, TRUE, NULL);
+       else
+               srcIsDir = isDirectory(srcName, FALSE, NULL);   
+       
+       if ((srcIsDir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
+               strcat(srcName, "/");
+               strcat(srcName, link_DestName);
        }
+       
+       if (flag&LN_FORCE)
+               unlink(srcName);
+               
+       if (flag&LN_SYMLINK)
+               status = symlink(link_DestName, srcName);
+       else
+               status = link(link_DestName, srcName);
 
-       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 (status != 0) {
+               perror(srcName);
+               return(FALSE);
        }
+       return(TRUE);
+}
 
-       if (removeoldFlag == TRUE) {
-           status = ( unlink(linkName) && errno != ENOENT );
-           if (status != 0) {
-               perror(linkName);
-               exit FALSE;
-           }
+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:
+                               usage(ln_usage);
+               }
        }
-
-       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;
+       return(status);
 }
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/