+++ /dev/null
-/* $XConsortium: mkshadow.c /main/2 1996/12/04 10:11:51 swick $ */
-/* mkshadow.c - make a "shadow copy" of a directory tree with symlinks.
- Copyright 1990, 1993 Free Software Foundation, Inc.
-
- Permission to use, copy, modify, and distribute this program for
- any purpose and without fee is hereby granted, provided that this
- copyright and permission notice appear on all copies, and that
- notice be given that copying and distribution is by permission of
- the Free Software Foundation. The Free Software Foundation makes
- no representations about the suitability of this software for any
- purpose. It is provided "as is" without expressed or implied
- warranty.
-
- (The FSF has modified its usual distribution terms, for this file,
- as a courtesy to the X project.) */
-
-/*
- * Usage: mkshadow [-X exclude_file] [-x exclude_pattern] ... MASTER [SHADOW]
- * Makes SHADOW be a "shadow copy" of MASTER. SHADOW defaults to the current
- * directory. Sort of like a recursive copy of MASTER to SHADOW.
- * However, symbolic links are used instead of actually
- * copying (non-directory) files.
- * Also, directories named RCS or SCCS are shared (with a symbolic link).
- * Warning messages are printed for files (and directories) in .
- * that don't match a corresponding file in MASTER (though
- * symbolic links are silently removed).
- * Also, a warning message is printed for non-directory files
- * under SHADOW that are not symbolic links.
- *
- * Files and directories can be excluded from the sharing
- * with the -X and -x flags. The flag `-x pattern' (or `-xpattern')
- * means that mkshadow should ignore any file whose name matches
- * the pattern. The pattern is a "globbing" pattern, i.e. the
- * characters *?[^-] are interpreted as by the shell.
- * If the pattern contains a '/' is is matched against the complete
- * current path (relative to '.'); otherwise, it is matched
- * against the last component of the path.
- * A `-X filename' flag means to read a set of exclusion patterns
- * from the named file, one pattern to a line.
- *
- * Originally written by Per Bothner at University of Wisconsin-Madison,
- * inspired by the lndir script distributed with X11.
- * Modified by Per Bothner <bothner@cygnus.com> November 1993
- * to more-or-less follow Posix.
- */
-
-#include <sys/types.h>
-#include <stdio.h>
-#ifdef BSD
-#include <strings.h>
-#define strchr index
-#else
-#include <string.h>
-#endif
-#include <sys/stat.h>
-#if defined(S_IFDIR) && !defined(S_ISDIR)
-#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
-#endif
-#if defined(S_IFLNK) && !defined(S_ISLNK)
-#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
-#endif
-#ifndef S_ISLNK
-#define lstat stat
-#endif
-#ifndef MAXPATHLEN
-#define MAXPATHLEN 1024
-#endif
-#include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-
-extern char * savedir();
-
-fatal(msg)
- char *msg;
-{
- if (errno) perror(msg ? msg : "");
- else if (msg) fprintf(stderr, "mkshadow: %s\n", msg);
- exit(-1);
-}
-
-/* When handling symbolic links to relative directories,
- * we need to prepend "../" to the "source".
- * We preallocate MAX_DEPTH repetations of "../" using a simple trick.
- */
-#define MAX_DEPTH 20
-#define PREPEND_BUFFER_SIZE (MAX_DEPTH*3)
-char master_buffer[MAXPATHLEN+PREPEND_BUFFER_SIZE] =
- "../../../../../../../../../../../../../../../../../../../../";
-/* The logical start of the master_buffer is defined by
- * master_start, which skips the fixed prepend area.
- */
-#define master_start (master_buffer+PREPEND_BUFFER_SIZE)
-char shadow_buffer[MAXPATHLEN];
-
-void bad_args(msg)
-{
- if (msg) fprintf(stderr, "%s\n", msg);
- fprintf (stderr, "usage: mkshadow [-X exclude_file] [-x exclude_pattern]");
- fprintf (stderr, " master [shadow]\n");
- exit(-1);
-}
-
-int exclude_count = 0;
-char **exclude_patterns = NULL;
-int exclude_limit = 0;
-
-void add_exclude(pattern)
- char *pattern;
-{
- if (exclude_limit == 0) {
- exclude_limit = 100;
- exclude_patterns = (char**)malloc(exclude_limit * sizeof(char*));
- } else if (exclude_count + 1 >= exclude_limit) {
- exclude_limit += 100;
- exclude_patterns = (char**)realloc(exclude_patterns,
- exclude_limit * sizeof(char*));
- }
- exclude_patterns[exclude_count] = pattern;
- exclude_count++;
-}
-
-void add_exclude_file(name)
- char *name;
-{
- char buf[MAXPATHLEN];
- FILE *file = fopen(name, "r");
- if (file == NULL) fatal("failed to find -X (exclude) file");
- for (;;) {
- int len;
- char *str = fgets(buf, MAXPATHLEN, file);
- if (str == NULL) break;
- len = strlen(str);
- if (len && str[len-1] == '\n') str[--len] = 0;
- if (!len) continue;
- str = (char*)malloc(len+1);
- strcpy(str, buf);
- add_exclude(str);
- }
- fclose(file);
-}
-
-main(argc, argv)
- char **argv;
-{
- char *master_name = NULL;
- char *shadow_name = NULL;
- int i;
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- switch(argv[i][1]) {
- case 'X':
- if (argv[i][2]) add_exclude_file(&argv[i][2]);
- else if (++i >= argc) bad_args(NULL);
- else add_exclude_file(argv[i]);
- break;
- case 'x':
- if (argv[i][2]) add_exclude(&argv[i][2]);
- else if (++i >= argc) bad_args(NULL);
- else add_exclude(argv[i]);
- break;
- default:
- bad_args(NULL);
- }
- } else if (master_name == NULL)
- master_name = argv[i];
- else if (shadow_name == NULL)
- shadow_name = argv[i];
- else bad_args (NULL);
- }
-
- if (master_name == NULL) bad_args(NULL);
- if (shadow_name == NULL)
- shadow_name = ".";
- else if ((shadow_name[0] != '.' || shadow_name[1])
- && master_name[0] != '/') {
- fprintf(stderr, "Shadowing a relative directory pathname to a \n");
- fprintf(stderr, "shadow other than '.' is not supported!\n");
- exit(-1);
- }
- strcpy(shadow_buffer, shadow_name);
- strcpy(master_start, master_name);
- DoCopy(master_start, shadow_buffer, 0);
- return 0;
-}
-
-int compare_strings(ptr1, ptr2)
- char **ptr1, **ptr2;
-{
- return strcmp(*ptr1, *ptr2);
-}
-
-void MakeLink(master, current, depth)
- char *master;
- char *current;
- int depth;
-{
- if (master[0] != '/') {
- /* Source directory was specified with a relative pathname. */
- if (master != master_start) {
- fatal("Internal bug: bad string buffer use");
- }
- /* Pre-pend "../" depth times. This compensates for
- * the directories we've entered. */
- master -= 3 * depth;
- }
- if (symlink(master, current)) {
- fprintf(stderr, "Failed to create symbolic link %s->%s\n",
- current, master);
- exit (-1);
- }
-}
-
-
-/* Get a sorted NULL_terminator array of (char*) using 'names'
- * (created by save_dir) as data.
- */
-char ** get_name_pointers(names)
- char *names;
-{
- int n_names = 0;
- int names_buf_size = 64;
- char *namep;
- char ** pointers = (char**)malloc(names_buf_size * sizeof(char*));
- if (!names || !pointers) fatal("virtual memory exhausted");
-
- for (namep = names; *namep; namep += strlen(namep) + 1) {
- if (n_names + 1 >= names_buf_size) {
- names_buf_size *= 2;
- pointers = (char**)realloc(pointers,
- names_buf_size * sizeof(char*));
- if (!pointers) fatal("virtual memory exhausted");
- }
- pointers[n_names++] = namep;
- }
- pointers[n_names] = 0;
- qsort(pointers, n_names, sizeof(char*), compare_strings);
- return pointers;
-}
-
-/* Recursively shadow the directory whose name is in MASTER
- * (which is == MASTER_START) into the destination directory named CURRENT.
- */
-
-DoCopy(master, current, depth)
- char *master; /* The source directory. */
- char *current; /* The destination directory. */
- int depth;
-{
- struct stat stat_master, stat_current;
- char **master_pointer, **current_pointer;
- char **master_names, **current_names;
- char *master_end, *current_end;
- char *master_name_buf, *current_name_buf;
- master_end = master + strlen(master);
- current_end = current + strlen(current);
-
- /* Get rid of terminal '/' */
- if (master_end[-1] == '/' && master != master_end - 1)
- *--master_end = 0;
- if (current_end[-1] == '/' && current != current_end - 1)
- *--current_end = 0;
-
- if (depth >= MAX_DEPTH) {
- fprintf(stderr,
- "Nesting too deep (depth %d at %s). Probable circularity.\n",
- depth, master);
- exit(-1);
- }
-
- master_name_buf = savedir(master, 500);
- if (master_name_buf == NULL) {
- fprintf(stderr, "Not enough memory or no such directory: %s\n",
- master);
- exit(-1);
- }
- current_name_buf = savedir(current, 500);
- if (current_name_buf == NULL) {
- fprintf(stderr, "Not enough memory or no such directory: %s\n",
- current);
- exit(-1);
- }
-
- master_names = get_name_pointers(master_name_buf);
- current_names = get_name_pointers(current_name_buf);
-
- master_pointer = master_names;
- current_pointer = current_names;
- for (;;) {
- int cmp, ipat;
- int in_master, in_current;
- char *cur_name;
- if (*master_pointer == NULL && *current_pointer == NULL)
- break;
- if (*master_pointer == NULL) cmp = 1;
- else if (*current_pointer == NULL) cmp = -1;
- else cmp = strcmp(*master_pointer, *current_pointer);
- if (cmp < 0) { /* file only exists in master directory */
- in_master = 1; in_current = 0;
- } else if (cmp == 0) { /* file exists in both directories */
- in_master = 1; in_current = 1;
- } else { /* file only exists in current directory */
- in_current = 1; in_master = 0;
- }
- cur_name = in_master ? *master_pointer : *current_pointer;
- sprintf(master_end, "/%s", cur_name);
- sprintf(current_end, "/%s", cur_name);
- for (ipat = 0; ipat < exclude_count; ipat++) {
- char *pat = exclude_patterns[ipat];
- char *cur;
- if (strchr(pat, '/')) cur = current + 2; /* Skip initial "./" */
- else cur = cur_name;
- if (wildmat(cur, pat)) goto skip;
- }
- if (in_master)
- if (lstat(master, &stat_master) != 0) fatal("stat failed");
- if (in_current)
- if (lstat(current, &stat_current) != 0) fatal("stat failed");
- if (in_current && !in_master) {
- if (S_ISLNK(stat_current.st_mode))
- if (unlink(current)) {
- fprintf(stderr, "Failed to remove symbolic link %s.\n",
- current);
- }
- else
- fprintf(stderr, "Removed symbolic link %s.\n",
- current);
- else {
- fprintf(stderr,
- "The file %s does not exist in the master tree.\n",
- current);
- }
- }
- else if (S_ISDIR(stat_master.st_mode)
- && strcmp(cur_name, "RCS") != 0
- && strcmp(cur_name, "SCCS") != 0) {
- if (!in_current) {
- if (mkdir(current, 0775)) fatal("mkdir failed");
- }
- else if (stat(current, &stat_current)) fatal("stat failed");
- if (!in_current || stat_current.st_dev != stat_master.st_dev
- || stat_current.st_ino != stat_master.st_ino)
- DoCopy(master, current, depth+1);
- else
- fprintf(stderr, "Link %s is the same as directory %s.\n",
- current, master);
- }
- else {
- if (!in_current)
- MakeLink(master, current, depth);
- else if (!S_ISLNK(stat_current.st_mode)) {
- fprintf(stderr, "Existing file %s is not a symbolc link.\n",
- current);
- } else {
- if (stat(current, &stat_current) || stat(master, &stat_master))
- fatal("stat failed");
- if (stat_current.st_dev != stat_master.st_dev
- || stat_current.st_ino != stat_master.st_ino) {
- fprintf(stderr, "Fixing incorrect symbolic link %s.\n",
- current);
- if (unlink(current)) {
- fprintf(stderr, "Failed to remove symbolic link %s.\n",
- current);
- }
- else
- MakeLink(master, current, depth);
- }
- }
- }
- skip:
- if (in_master) master_pointer++;
- if (in_current) current_pointer++;
- }
-
- free(master_names); free(current_names);
- free(master_name_buf); free(current_name_buf);
-}
projects / rdpsrv / blobdiff