558e5a8c40
Code clean-up for xdg configuration path support. * pt/xdg-config-path: path.c: remove home_config_paths() git-config: replace use of home_config_paths() git-commit: replace use of home_config_paths() credential-store.c: replace home_config_paths() with xdg_config_home() dir.c: replace home_config_paths() with xdg_config_home() attr.c: replace home_config_paths() with xdg_config_home() path.c: implement xdg_config_home()
921 lines
21 KiB
C
921 lines
21 KiB
C
/*
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* Utilities for paths and pathnames
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*/
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#include "cache.h"
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#include "strbuf.h"
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#include "string-list.h"
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#include "dir.h"
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static int get_st_mode_bits(const char *path, int *mode)
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{
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struct stat st;
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if (lstat(path, &st) < 0)
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return -1;
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*mode = st.st_mode;
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return 0;
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}
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static char bad_path[] = "/bad-path/";
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static struct strbuf *get_pathname(void)
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{
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static struct strbuf pathname_array[4] = {
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STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT
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};
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static int index;
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struct strbuf *sb = &pathname_array[3 & ++index];
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strbuf_reset(sb);
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return sb;
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}
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static char *cleanup_path(char *path)
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{
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/* Clean it up */
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if (!memcmp(path, "./", 2)) {
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path += 2;
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while (*path == '/')
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path++;
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}
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return path;
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}
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static void strbuf_cleanup_path(struct strbuf *sb)
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{
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char *path = cleanup_path(sb->buf);
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if (path > sb->buf)
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strbuf_remove(sb, 0, path - sb->buf);
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}
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char *mksnpath(char *buf, size_t n, const char *fmt, ...)
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{
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va_list args;
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unsigned len;
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va_start(args, fmt);
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len = vsnprintf(buf, n, fmt, args);
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va_end(args);
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if (len >= n) {
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strlcpy(buf, bad_path, n);
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return buf;
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}
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return cleanup_path(buf);
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}
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static int dir_prefix(const char *buf, const char *dir)
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{
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int len = strlen(dir);
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return !strncmp(buf, dir, len) &&
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(is_dir_sep(buf[len]) || buf[len] == '\0');
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}
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/* $buf =~ m|$dir/+$file| but without regex */
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static int is_dir_file(const char *buf, const char *dir, const char *file)
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{
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int len = strlen(dir);
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if (strncmp(buf, dir, len) || !is_dir_sep(buf[len]))
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return 0;
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while (is_dir_sep(buf[len]))
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len++;
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return !strcmp(buf + len, file);
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}
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static void replace_dir(struct strbuf *buf, int len, const char *newdir)
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{
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int newlen = strlen(newdir);
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int need_sep = (buf->buf[len] && !is_dir_sep(buf->buf[len])) &&
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!is_dir_sep(newdir[newlen - 1]);
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if (need_sep)
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len--; /* keep one char, to be replaced with '/' */
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strbuf_splice(buf, 0, len, newdir, newlen);
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if (need_sep)
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buf->buf[newlen] = '/';
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}
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static const char *common_list[] = {
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"/branches", "/hooks", "/info", "!/logs", "/lost-found",
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"/objects", "/refs", "/remotes", "/worktrees", "/rr-cache", "/svn",
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"config", "!gc.pid", "packed-refs", "shallow",
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NULL
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};
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static void update_common_dir(struct strbuf *buf, int git_dir_len)
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{
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char *base = buf->buf + git_dir_len;
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const char **p;
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if (is_dir_file(base, "logs", "HEAD") ||
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is_dir_file(base, "info", "sparse-checkout"))
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return; /* keep this in $GIT_DIR */
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for (p = common_list; *p; p++) {
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const char *path = *p;
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int is_dir = 0;
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if (*path == '!')
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path++;
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if (*path == '/') {
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path++;
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is_dir = 1;
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}
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if (is_dir && dir_prefix(base, path)) {
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replace_dir(buf, git_dir_len, get_git_common_dir());
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return;
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}
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if (!is_dir && !strcmp(base, path)) {
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replace_dir(buf, git_dir_len, get_git_common_dir());
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return;
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}
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}
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}
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void report_linked_checkout_garbage(void)
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{
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struct strbuf sb = STRBUF_INIT;
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const char **p;
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int len;
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if (!git_common_dir_env)
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return;
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strbuf_addf(&sb, "%s/", get_git_dir());
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len = sb.len;
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for (p = common_list; *p; p++) {
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const char *path = *p;
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if (*path == '!')
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continue;
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strbuf_setlen(&sb, len);
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strbuf_addstr(&sb, path);
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if (file_exists(sb.buf))
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report_garbage("unused in linked checkout", sb.buf);
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}
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strbuf_release(&sb);
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}
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static void adjust_git_path(struct strbuf *buf, int git_dir_len)
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{
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const char *base = buf->buf + git_dir_len;
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if (git_graft_env && is_dir_file(base, "info", "grafts"))
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strbuf_splice(buf, 0, buf->len,
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get_graft_file(), strlen(get_graft_file()));
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else if (git_index_env && !strcmp(base, "index"))
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strbuf_splice(buf, 0, buf->len,
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get_index_file(), strlen(get_index_file()));
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else if (git_db_env && dir_prefix(base, "objects"))
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replace_dir(buf, git_dir_len + 7, get_object_directory());
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else if (git_common_dir_env)
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update_common_dir(buf, git_dir_len);
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}
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static void do_git_path(struct strbuf *buf, const char *fmt, va_list args)
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{
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int gitdir_len;
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strbuf_addstr(buf, get_git_dir());
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if (buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
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strbuf_addch(buf, '/');
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gitdir_len = buf->len;
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strbuf_vaddf(buf, fmt, args);
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adjust_git_path(buf, gitdir_len);
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strbuf_cleanup_path(buf);
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}
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void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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do_git_path(sb, fmt, args);
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va_end(args);
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}
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const char *git_path(const char *fmt, ...)
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{
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struct strbuf *pathname = get_pathname();
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va_list args;
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va_start(args, fmt);
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do_git_path(pathname, fmt, args);
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va_end(args);
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return pathname->buf;
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}
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char *git_pathdup(const char *fmt, ...)
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{
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struct strbuf path = STRBUF_INIT;
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va_list args;
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va_start(args, fmt);
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do_git_path(&path, fmt, args);
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va_end(args);
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return strbuf_detach(&path, NULL);
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}
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char *mkpathdup(const char *fmt, ...)
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{
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struct strbuf sb = STRBUF_INIT;
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va_list args;
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va_start(args, fmt);
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strbuf_vaddf(&sb, fmt, args);
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va_end(args);
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strbuf_cleanup_path(&sb);
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return strbuf_detach(&sb, NULL);
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}
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const char *mkpath(const char *fmt, ...)
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{
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va_list args;
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struct strbuf *pathname = get_pathname();
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va_start(args, fmt);
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strbuf_vaddf(pathname, fmt, args);
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va_end(args);
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return cleanup_path(pathname->buf);
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}
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const char *git_path_submodule(const char *path, const char *fmt, ...)
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{
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struct strbuf *buf = get_pathname();
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const char *git_dir;
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va_list args;
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strbuf_addstr(buf, path);
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if (buf->len && buf->buf[buf->len - 1] != '/')
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strbuf_addch(buf, '/');
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strbuf_addstr(buf, ".git");
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git_dir = read_gitfile(buf->buf);
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if (git_dir) {
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strbuf_reset(buf);
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strbuf_addstr(buf, git_dir);
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}
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strbuf_addch(buf, '/');
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va_start(args, fmt);
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strbuf_vaddf(buf, fmt, args);
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va_end(args);
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strbuf_cleanup_path(buf);
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return buf->buf;
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}
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int validate_headref(const char *path)
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{
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struct stat st;
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char *buf, buffer[256];
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unsigned char sha1[20];
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int fd;
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ssize_t len;
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if (lstat(path, &st) < 0)
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return -1;
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/* Make sure it is a "refs/.." symlink */
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if (S_ISLNK(st.st_mode)) {
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len = readlink(path, buffer, sizeof(buffer)-1);
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if (len >= 5 && !memcmp("refs/", buffer, 5))
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return 0;
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return -1;
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}
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/*
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* Anything else, just open it and try to see if it is a symbolic ref.
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*/
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return -1;
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len = read_in_full(fd, buffer, sizeof(buffer)-1);
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close(fd);
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/*
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* Is it a symbolic ref?
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*/
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if (len < 4)
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return -1;
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if (!memcmp("ref:", buffer, 4)) {
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buf = buffer + 4;
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len -= 4;
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while (len && isspace(*buf))
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buf++, len--;
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if (len >= 5 && !memcmp("refs/", buf, 5))
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return 0;
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}
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/*
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* Is this a detached HEAD?
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*/
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if (!get_sha1_hex(buffer, sha1))
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return 0;
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return -1;
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}
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static struct passwd *getpw_str(const char *username, size_t len)
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{
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struct passwd *pw;
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char *username_z = xmemdupz(username, len);
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pw = getpwnam(username_z);
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free(username_z);
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return pw;
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}
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/*
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* Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
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* then it is a newly allocated string. Returns NULL on getpw failure or
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* if path is NULL.
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*/
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char *expand_user_path(const char *path)
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{
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struct strbuf user_path = STRBUF_INIT;
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const char *to_copy = path;
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if (path == NULL)
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goto return_null;
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if (path[0] == '~') {
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const char *first_slash = strchrnul(path, '/');
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const char *username = path + 1;
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size_t username_len = first_slash - username;
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if (username_len == 0) {
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const char *home = getenv("HOME");
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if (!home)
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goto return_null;
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strbuf_addstr(&user_path, home);
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} else {
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struct passwd *pw = getpw_str(username, username_len);
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if (!pw)
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goto return_null;
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strbuf_addstr(&user_path, pw->pw_dir);
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}
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to_copy = first_slash;
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}
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strbuf_addstr(&user_path, to_copy);
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return strbuf_detach(&user_path, NULL);
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return_null:
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strbuf_release(&user_path);
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return NULL;
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}
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/*
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* First, one directory to try is determined by the following algorithm.
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*
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* (0) If "strict" is given, the path is used as given and no DWIM is
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* done. Otherwise:
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* (1) "~/path" to mean path under the running user's home directory;
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* (2) "~user/path" to mean path under named user's home directory;
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* (3) "relative/path" to mean cwd relative directory; or
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* (4) "/absolute/path" to mean absolute directory.
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*
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* Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git"
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* in this order. We select the first one that is a valid git repository, and
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* chdir() to it. If none match, or we fail to chdir, we return NULL.
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*
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* If all goes well, we return the directory we used to chdir() (but
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* before ~user is expanded), avoiding getcwd() resolving symbolic
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* links. User relative paths are also returned as they are given,
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* except DWIM suffixing.
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*/
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const char *enter_repo(const char *path, int strict)
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{
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static char used_path[PATH_MAX];
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static char validated_path[PATH_MAX];
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if (!path)
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return NULL;
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if (!strict) {
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static const char *suffix[] = {
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"/.git", "", ".git/.git", ".git", NULL,
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};
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const char *gitfile;
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int len = strlen(path);
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int i;
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while ((1 < len) && (path[len-1] == '/'))
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len--;
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if (PATH_MAX <= len)
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return NULL;
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strncpy(used_path, path, len); used_path[len] = 0 ;
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strcpy(validated_path, used_path);
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if (used_path[0] == '~') {
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char *newpath = expand_user_path(used_path);
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if (!newpath || (PATH_MAX - 10 < strlen(newpath))) {
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free(newpath);
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return NULL;
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}
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/*
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* Copy back into the static buffer. A pity
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* since newpath was not bounded, but other
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* branches of the if are limited by PATH_MAX
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* anyway.
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*/
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strcpy(used_path, newpath); free(newpath);
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}
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else if (PATH_MAX - 10 < len)
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return NULL;
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len = strlen(used_path);
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for (i = 0; suffix[i]; i++) {
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struct stat st;
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strcpy(used_path + len, suffix[i]);
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if (!stat(used_path, &st) &&
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(S_ISREG(st.st_mode) ||
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(S_ISDIR(st.st_mode) && is_git_directory(used_path)))) {
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strcat(validated_path, suffix[i]);
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break;
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}
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}
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if (!suffix[i])
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return NULL;
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gitfile = read_gitfile(used_path) ;
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if (gitfile)
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strcpy(used_path, gitfile);
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if (chdir(used_path))
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return NULL;
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path = validated_path;
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}
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else if (chdir(path))
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return NULL;
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|
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if (access("objects", X_OK) == 0 && access("refs", X_OK) == 0 &&
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validate_headref("HEAD") == 0) {
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set_git_dir(".");
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check_repository_format();
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return path;
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}
|
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|
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return NULL;
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}
|
|
|
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static int calc_shared_perm(int mode)
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{
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int tweak;
|
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|
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if (shared_repository < 0)
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tweak = -shared_repository;
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else
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tweak = shared_repository;
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|
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if (!(mode & S_IWUSR))
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tweak &= ~0222;
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if (mode & S_IXUSR)
|
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/* Copy read bits to execute bits */
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tweak |= (tweak & 0444) >> 2;
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if (shared_repository < 0)
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mode = (mode & ~0777) | tweak;
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else
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mode |= tweak;
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|
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return mode;
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}
|
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|
|
|
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int adjust_shared_perm(const char *path)
|
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{
|
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int old_mode, new_mode;
|
|
|
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if (!shared_repository)
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return 0;
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if (get_st_mode_bits(path, &old_mode) < 0)
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return -1;
|
|
|
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new_mode = calc_shared_perm(old_mode);
|
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if (S_ISDIR(old_mode)) {
|
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/* Copy read bits to execute bits */
|
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new_mode |= (new_mode & 0444) >> 2;
|
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new_mode |= FORCE_DIR_SET_GID;
|
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}
|
|
|
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if (((old_mode ^ new_mode) & ~S_IFMT) &&
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chmod(path, (new_mode & ~S_IFMT)) < 0)
|
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return -2;
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return 0;
|
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}
|
|
|
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static int have_same_root(const char *path1, const char *path2)
|
|
{
|
|
int is_abs1, is_abs2;
|
|
|
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is_abs1 = is_absolute_path(path1);
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is_abs2 = is_absolute_path(path2);
|
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return (is_abs1 && is_abs2 && tolower(path1[0]) == tolower(path2[0])) ||
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(!is_abs1 && !is_abs2);
|
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}
|
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|
|
/*
|
|
* Give path as relative to prefix.
|
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*
|
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* The strbuf may or may not be used, so do not assume it contains the
|
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* returned path.
|
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*/
|
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const char *relative_path(const char *in, const char *prefix,
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struct strbuf *sb)
|
|
{
|
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int in_len = in ? strlen(in) : 0;
|
|
int prefix_len = prefix ? strlen(prefix) : 0;
|
|
int in_off = 0;
|
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int prefix_off = 0;
|
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int i = 0, j = 0;
|
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|
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if (!in_len)
|
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return "./";
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else if (!prefix_len)
|
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return in;
|
|
|
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if (have_same_root(in, prefix)) {
|
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/* bypass dos_drive, for "c:" is identical to "C:" */
|
|
if (has_dos_drive_prefix(in)) {
|
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i = 2;
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j = 2;
|
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}
|
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} else {
|
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return in;
|
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}
|
|
|
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while (i < prefix_len && j < in_len && prefix[i] == in[j]) {
|
|
if (is_dir_sep(prefix[i])) {
|
|
while (is_dir_sep(prefix[i]))
|
|
i++;
|
|
while (is_dir_sep(in[j]))
|
|
j++;
|
|
prefix_off = i;
|
|
in_off = j;
|
|
} else {
|
|
i++;
|
|
j++;
|
|
}
|
|
}
|
|
|
|
if (
|
|
/* "prefix" seems like prefix of "in" */
|
|
i >= prefix_len &&
|
|
/*
|
|
* but "/foo" is not a prefix of "/foobar"
|
|
* (i.e. prefix not end with '/')
|
|
*/
|
|
prefix_off < prefix_len) {
|
|
if (j >= in_len) {
|
|
/* in="/a/b", prefix="/a/b" */
|
|
in_off = in_len;
|
|
} else if (is_dir_sep(in[j])) {
|
|
/* in="/a/b/c", prefix="/a/b" */
|
|
while (is_dir_sep(in[j]))
|
|
j++;
|
|
in_off = j;
|
|
} else {
|
|
/* in="/a/bbb/c", prefix="/a/b" */
|
|
i = prefix_off;
|
|
}
|
|
} else if (
|
|
/* "in" is short than "prefix" */
|
|
j >= in_len &&
|
|
/* "in" not end with '/' */
|
|
in_off < in_len) {
|
|
if (is_dir_sep(prefix[i])) {
|
|
/* in="/a/b", prefix="/a/b/c/" */
|
|
while (is_dir_sep(prefix[i]))
|
|
i++;
|
|
in_off = in_len;
|
|
}
|
|
}
|
|
in += in_off;
|
|
in_len -= in_off;
|
|
|
|
if (i >= prefix_len) {
|
|
if (!in_len)
|
|
return "./";
|
|
else
|
|
return in;
|
|
}
|
|
|
|
strbuf_reset(sb);
|
|
strbuf_grow(sb, in_len);
|
|
|
|
while (i < prefix_len) {
|
|
if (is_dir_sep(prefix[i])) {
|
|
strbuf_addstr(sb, "../");
|
|
while (is_dir_sep(prefix[i]))
|
|
i++;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
if (!is_dir_sep(prefix[prefix_len - 1]))
|
|
strbuf_addstr(sb, "../");
|
|
|
|
strbuf_addstr(sb, in);
|
|
|
|
return sb->buf;
|
|
}
|
|
|
|
/*
|
|
* A simpler implementation of relative_path
|
|
*
|
|
* Get relative path by removing "prefix" from "in". This function
|
|
* first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
|
|
* to increase performance when traversing the path to work_tree.
|
|
*/
|
|
const char *remove_leading_path(const char *in, const char *prefix)
|
|
{
|
|
static char buf[PATH_MAX + 1];
|
|
int i = 0, j = 0;
|
|
|
|
if (!prefix || !prefix[0])
|
|
return in;
|
|
while (prefix[i]) {
|
|
if (is_dir_sep(prefix[i])) {
|
|
if (!is_dir_sep(in[j]))
|
|
return in;
|
|
while (is_dir_sep(prefix[i]))
|
|
i++;
|
|
while (is_dir_sep(in[j]))
|
|
j++;
|
|
continue;
|
|
} else if (in[j] != prefix[i]) {
|
|
return in;
|
|
}
|
|
i++;
|
|
j++;
|
|
}
|
|
if (
|
|
/* "/foo" is a prefix of "/foo" */
|
|
in[j] &&
|
|
/* "/foo" is not a prefix of "/foobar" */
|
|
!is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j])
|
|
)
|
|
return in;
|
|
while (is_dir_sep(in[j]))
|
|
j++;
|
|
if (!in[j])
|
|
strcpy(buf, ".");
|
|
else
|
|
strcpy(buf, in + j);
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* It is okay if dst == src, but they should not overlap otherwise.
|
|
*
|
|
* Performs the following normalizations on src, storing the result in dst:
|
|
* - Ensures that components are separated by '/' (Windows only)
|
|
* - Squashes sequences of '/'.
|
|
* - Removes "." components.
|
|
* - Removes ".." components, and the components the precede them.
|
|
* Returns failure (non-zero) if a ".." component appears as first path
|
|
* component anytime during the normalization. Otherwise, returns success (0).
|
|
*
|
|
* Note that this function is purely textual. It does not follow symlinks,
|
|
* verify the existence of the path, or make any system calls.
|
|
*
|
|
* prefix_len != NULL is for a specific case of prefix_pathspec():
|
|
* assume that src == dst and src[0..prefix_len-1] is already
|
|
* normalized, any time "../" eats up to the prefix_len part,
|
|
* prefix_len is reduced. In the end prefix_len is the remaining
|
|
* prefix that has not been overridden by user pathspec.
|
|
*/
|
|
int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
|
|
{
|
|
char *dst0;
|
|
|
|
if (has_dos_drive_prefix(src)) {
|
|
*dst++ = *src++;
|
|
*dst++ = *src++;
|
|
}
|
|
dst0 = dst;
|
|
|
|
if (is_dir_sep(*src)) {
|
|
*dst++ = '/';
|
|
while (is_dir_sep(*src))
|
|
src++;
|
|
}
|
|
|
|
for (;;) {
|
|
char c = *src;
|
|
|
|
/*
|
|
* A path component that begins with . could be
|
|
* special:
|
|
* (1) "." and ends -- ignore and terminate.
|
|
* (2) "./" -- ignore them, eat slash and continue.
|
|
* (3) ".." and ends -- strip one and terminate.
|
|
* (4) "../" -- strip one, eat slash and continue.
|
|
*/
|
|
if (c == '.') {
|
|
if (!src[1]) {
|
|
/* (1) */
|
|
src++;
|
|
} else if (is_dir_sep(src[1])) {
|
|
/* (2) */
|
|
src += 2;
|
|
while (is_dir_sep(*src))
|
|
src++;
|
|
continue;
|
|
} else if (src[1] == '.') {
|
|
if (!src[2]) {
|
|
/* (3) */
|
|
src += 2;
|
|
goto up_one;
|
|
} else if (is_dir_sep(src[2])) {
|
|
/* (4) */
|
|
src += 3;
|
|
while (is_dir_sep(*src))
|
|
src++;
|
|
goto up_one;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy up to the next '/', and eat all '/' */
|
|
while ((c = *src++) != '\0' && !is_dir_sep(c))
|
|
*dst++ = c;
|
|
if (is_dir_sep(c)) {
|
|
*dst++ = '/';
|
|
while (is_dir_sep(c))
|
|
c = *src++;
|
|
src--;
|
|
} else if (!c)
|
|
break;
|
|
continue;
|
|
|
|
up_one:
|
|
/*
|
|
* dst0..dst is prefix portion, and dst[-1] is '/';
|
|
* go up one level.
|
|
*/
|
|
dst--; /* go to trailing '/' */
|
|
if (dst <= dst0)
|
|
return -1;
|
|
/* Windows: dst[-1] cannot be backslash anymore */
|
|
while (dst0 < dst && dst[-1] != '/')
|
|
dst--;
|
|
if (prefix_len && *prefix_len > dst - dst0)
|
|
*prefix_len = dst - dst0;
|
|
}
|
|
*dst = '\0';
|
|
return 0;
|
|
}
|
|
|
|
int normalize_path_copy(char *dst, const char *src)
|
|
{
|
|
return normalize_path_copy_len(dst, src, NULL);
|
|
}
|
|
|
|
/*
|
|
* path = Canonical absolute path
|
|
* prefixes = string_list containing normalized, absolute paths without
|
|
* trailing slashes (except for the root directory, which is denoted by "/").
|
|
*
|
|
* Determines, for each path in prefixes, whether the "prefix"
|
|
* is an ancestor directory of path. Returns the length of the longest
|
|
* ancestor directory, excluding any trailing slashes, or -1 if no prefix
|
|
* is an ancestor. (Note that this means 0 is returned if prefixes is
|
|
* ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
|
|
* are not considered to be their own ancestors. path must be in a
|
|
* canonical form: empty components, or "." or ".." components are not
|
|
* allowed.
|
|
*/
|
|
int longest_ancestor_length(const char *path, struct string_list *prefixes)
|
|
{
|
|
int i, max_len = -1;
|
|
|
|
if (!strcmp(path, "/"))
|
|
return -1;
|
|
|
|
for (i = 0; i < prefixes->nr; i++) {
|
|
const char *ceil = prefixes->items[i].string;
|
|
int len = strlen(ceil);
|
|
|
|
if (len == 1 && ceil[0] == '/')
|
|
len = 0; /* root matches anything, with length 0 */
|
|
else if (!strncmp(path, ceil, len) && path[len] == '/')
|
|
; /* match of length len */
|
|
else
|
|
continue; /* no match */
|
|
|
|
if (len > max_len)
|
|
max_len = len;
|
|
}
|
|
|
|
return max_len;
|
|
}
|
|
|
|
/* strip arbitrary amount of directory separators at end of path */
|
|
static inline int chomp_trailing_dir_sep(const char *path, int len)
|
|
{
|
|
while (len && is_dir_sep(path[len - 1]))
|
|
len--;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* If path ends with suffix (complete path components), returns the
|
|
* part before suffix (sans trailing directory separators).
|
|
* Otherwise returns NULL.
|
|
*/
|
|
char *strip_path_suffix(const char *path, const char *suffix)
|
|
{
|
|
int path_len = strlen(path), suffix_len = strlen(suffix);
|
|
|
|
while (suffix_len) {
|
|
if (!path_len)
|
|
return NULL;
|
|
|
|
if (is_dir_sep(path[path_len - 1])) {
|
|
if (!is_dir_sep(suffix[suffix_len - 1]))
|
|
return NULL;
|
|
path_len = chomp_trailing_dir_sep(path, path_len);
|
|
suffix_len = chomp_trailing_dir_sep(suffix, suffix_len);
|
|
}
|
|
else if (path[--path_len] != suffix[--suffix_len])
|
|
return NULL;
|
|
}
|
|
|
|
if (path_len && !is_dir_sep(path[path_len - 1]))
|
|
return NULL;
|
|
return xstrndup(path, chomp_trailing_dir_sep(path, path_len));
|
|
}
|
|
|
|
int daemon_avoid_alias(const char *p)
|
|
{
|
|
int sl, ndot;
|
|
|
|
/*
|
|
* This resurrects the belts and suspenders paranoia check by HPA
|
|
* done in <435560F7.4080006@zytor.com> thread, now enter_repo()
|
|
* does not do getcwd() based path canonicalization.
|
|
*
|
|
* sl becomes true immediately after seeing '/' and continues to
|
|
* be true as long as dots continue after that without intervening
|
|
* non-dot character.
|
|
*/
|
|
if (!p || (*p != '/' && *p != '~'))
|
|
return -1;
|
|
sl = 1; ndot = 0;
|
|
p++;
|
|
|
|
while (1) {
|
|
char ch = *p++;
|
|
if (sl) {
|
|
if (ch == '.')
|
|
ndot++;
|
|
else if (ch == '/') {
|
|
if (ndot < 3)
|
|
/* reject //, /./ and /../ */
|
|
return -1;
|
|
ndot = 0;
|
|
}
|
|
else if (ch == 0) {
|
|
if (0 < ndot && ndot < 3)
|
|
/* reject /.$ and /..$ */
|
|
return -1;
|
|
return 0;
|
|
}
|
|
else
|
|
sl = ndot = 0;
|
|
}
|
|
else if (ch == 0)
|
|
return 0;
|
|
else if (ch == '/') {
|
|
sl = 1;
|
|
ndot = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int only_spaces_and_periods(const char *path, size_t len, size_t skip)
|
|
{
|
|
if (len < skip)
|
|
return 0;
|
|
len -= skip;
|
|
path += skip;
|
|
while (len-- > 0) {
|
|
char c = *(path++);
|
|
if (c != ' ' && c != '.')
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int is_ntfs_dotgit(const char *name)
|
|
{
|
|
int len;
|
|
|
|
for (len = 0; ; len++)
|
|
if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) {
|
|
if (only_spaces_and_periods(name, len, 4) &&
|
|
!strncasecmp(name, ".git", 4))
|
|
return 1;
|
|
if (only_spaces_and_periods(name, len, 5) &&
|
|
!strncasecmp(name, "git~1", 5))
|
|
return 1;
|
|
if (name[len] != '\\')
|
|
return 0;
|
|
name += len + 1;
|
|
len = -1;
|
|
}
|
|
}
|
|
|
|
char *xdg_config_home(const char *filename)
|
|
{
|
|
const char *home, *config_home;
|
|
|
|
assert(filename);
|
|
config_home = getenv("XDG_CONFIG_HOME");
|
|
if (config_home && *config_home)
|
|
return mkpathdup("%s/git/%s", config_home, filename);
|
|
|
|
home = getenv("HOME");
|
|
if (home)
|
|
return mkpathdup("%s/.config/git/%s", home, filename);
|
|
return NULL;
|
|
}
|