/*
* Mini ln implementation for busybox
*
- * Copyright (C) 1999,2000 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
*
*/
-#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 <string.h>
+#include <stdlib.h>
#include <errno.h>
+#include <unistd.h>
-static const char ln_usage[] =
- "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nCreate a link named LINK_NAME or DIRECTORY to the specified TARGET\n"
- "\nYou may use '--' to indicate that all following arguments are non-options.\n\n"
- "Options:\n"
- "\t-s\tmake symbolic links instead of hard links\n"
+static const int LN_SYMLINK = 1;
+static const int LN_FORCE = 2;
+static const int LN_NODEREFERENCE = 4;
- "\t-f\tremove existing destination files\n"
-#if 0
- "\t-n\tno dereference symlinks - treat like normal file\n"
-#endif
-#endif
- ;
-
-static int symlinkFlag = FALSE;
-static int removeoldFlag = FALSE;
-static int followLinks = TRUE;
+/*
+ * 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;
+ int srcIsDir;
+ char *srcName;
+
+ if (link_DestName==NULL)
+ return(FALSE);
+
+ srcName = (char *) malloc(strlen(link_SrcName)+strlen(link_DestName)+1);
+
+ if (link_SrcName==NULL)
+ strcpy(srcName, link_DestName);
+ else
+ strcpy(srcName, link_SrcName);
+
+ if (flag&LN_NODEREFERENCE)
+ srcIsDir = is_directory(srcName, TRUE, NULL);
+ else
+ srcIsDir = is_directory(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 (status != 0) {
+ perror(srcName);
+ return(FALSE);
+ }
+ return(TRUE);
+}
extern int ln_main(int argc, char **argv)
{
- char *linkName, *dirName;
- int linkIntoDirFlag;
- int stopIt = FALSE;
-
- argc--;
- argv++;
-
+ int status = EXIT_SUCCESS;
+ int flag = 0;
+ int opt;
+
/* Parse any options */
- while (argc > 0 && stopIt == FALSE) {
- if (**argv == '-') {
- while (*++(*argv))
- switch (**argv) {
- case 's':
- symlinkFlag = TRUE;
- break;
- case 'f':
- removeoldFlag = TRUE;
- break;
- case 'n':
- followLinks = FALSE;
- break;
- case '-':
- stopIt = TRUE;
- break;
- default:
- usage(ln_usage);
- }
- argc--;
- argv++;
+ 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);
}
- else
- break;
- }
-
- if (argc < 2) {
- usage(ln_usage);
- }
-
- linkName = argv[argc - 1];
-
- if (strlen(linkName) > BUFSIZ) {
- fprintf(stderr, name_too_long, "ln");
- exit FALSE;
- }
-
- linkIntoDirFlag = isDirectory(linkName, TRUE, NULL);
-
- if ((argc >= 3) && linkIntoDirFlag == FALSE) {
- fprintf(stderr, not_a_directory, "ln", linkName);
- exit FALSE;
}
-
- if (linkIntoDirFlag == TRUE)
- dirName = linkName;
-
- while (argc-- >= 2) {
-#if 0
- char srcName[BUFSIZ + 1];
- int nChars;
-#endif
- int status;
-
- if (strlen(*argv) > BUFSIZ) {
- fprintf(stderr, name_too_long, "ln");
- exit FALSE;
- }
-
-#if 0
- if (followLinks == FALSE) {
- strcpy(srcName, *argv);
- } else {
- /* Warning! This can silently truncate if > BUFSIZ, but
- I don't think that there can be one > BUFSIZ anyway. */
- nChars = readlink(*argv, srcName, BUFSIZ);
- srcName[nChars] = '\0';
- }
-#endif
- if (linkIntoDirFlag == TRUE) {
- char *baseName = get_last_path_component(*argv);
- linkName = (char *)malloc(strlen(dirName)+strlen(baseName)+2);
- strcpy(linkName, dirName);
- if(dirName[strlen(dirName)-1] != '/')
- strcat(linkName, "/");
- strcat(linkName,baseName);
- }
-
- 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;
- }
-
- if (linkIntoDirFlag)
- free(linkName);
-
- argv++;
+ while(optind<(argc-1)) {
+ if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
+ status = EXIT_FAILURE;
+ optind++;
}
- return( TRUE);
+ return(status);
}
/*