diff options
Diffstat (limited to 'path.c')
| -rw-r--r-- | path.c | 121 |
1 files changed, 61 insertions, 60 deletions
@@ -1,17 +1,25 @@ /* - * I'm tired of doing "vsnprintf()" etc just to open a - * file, so here's a "return static buffer with printf" - * interface for paths. - * - * It's obviously not thread-safe. Sue me. But it's quite - * useful for doing things like - * - * f = open(mkpath("%s/%s.git", base, name), O_RDONLY); - * - * which is what it's designed for. + * Utilities for paths and pathnames */ #include "cache.h" #include "strbuf.h" +#include "string-list.h" + +#ifndef get_st_mode_bits +/* + * The replacement lstat(2) we use on Cygwin is incomplete and + * may return wrong permission bits. Most of the time we do not care, + * but the callsites of this wrapper do care. + */ +int get_st_mode_bits(const char *path, int *mode) +{ + struct stat st; + if (lstat(path, &st) < 0) + return -1; + *mode = st.st_mode; + return 0; +} +#endif static char bad_path[] = "/bad-path/"; @@ -388,28 +396,14 @@ const char *enter_repo(const char *path, int strict) return NULL; } -int set_shared_perm(const char *path, int mode) +static int calc_shared_perm(int mode) { - struct stat st; - int tweak, shared, orig_mode; + int tweak; - if (!shared_repository) { - if (mode) - return chmod(path, mode & ~S_IFMT); - return 0; - } - if (!mode) { - if (lstat(path, &st) < 0) - return -1; - mode = st.st_mode; - orig_mode = mode; - } else - orig_mode = 0; if (shared_repository < 0) - shared = -shared_repository; + tweak = -shared_repository; else - shared = shared_repository; - tweak = shared; + tweak = shared_repository; if (!(mode & S_IWUSR)) tweak &= ~0222; @@ -421,16 +415,28 @@ int set_shared_perm(const char *path, int mode) else mode |= tweak; - if (S_ISDIR(mode)) { + return mode; +} + + +int adjust_shared_perm(const char *path) +{ + int old_mode, new_mode; + + if (!shared_repository) + return 0; + if (get_st_mode_bits(path, &old_mode) < 0) + return -1; + + new_mode = calc_shared_perm(old_mode); + if (S_ISDIR(old_mode)) { /* Copy read bits to execute bits */ - mode |= (shared & 0444) >> 2; - mode |= FORCE_DIR_SET_GID; + new_mode |= (new_mode & 0444) >> 2; + new_mode |= FORCE_DIR_SET_GID; } - if (((shared_repository < 0 - ? (orig_mode & (FORCE_DIR_SET_GID | 0777)) - : (orig_mode & mode)) != mode) && - chmod(path, (mode & ~S_IFMT)) < 0) + if (((old_mode ^ new_mode) & ~S_IFMT) && + chmod(path, (new_mode & ~S_IFMT)) < 0) return -2; return 0; } @@ -569,43 +575,38 @@ int normalize_path_copy(char *dst, const char *src) /* * path = Canonical absolute path - * prefix_list = Colon-separated list of absolute paths + * prefixes = string_list containing normalized, absolute paths without + * trailing slashes (except for the root directory, which is denoted by "/"). * - * Determines, for each path in prefix_list, whether the "prefix" really + * 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 prefix_list is - * "/".) "/foo" is not considered an ancestor of "/foobar". Directories + * 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. prefix_list may be null, which is like "". + * allowed. */ -int longest_ancestor_length(const char *path, const char *prefix_list) +int longest_ancestor_length(const char *path, struct string_list *prefixes) { - char buf[PATH_MAX+1]; - const char *ceil, *colon; - int len, max_len = -1; + int i, max_len = -1; - if (prefix_list == NULL || !strcmp(path, "/")) + if (!strcmp(path, "/")) return -1; - for (colon = ceil = prefix_list; *colon; ceil = colon+1) { - for (colon = ceil; *colon && *colon != PATH_SEP; colon++); - len = colon - ceil; - if (len == 0 || len > PATH_MAX || !is_absolute_path(ceil)) - continue; - strlcpy(buf, ceil, len+1); - if (normalize_path_copy(buf, buf) < 0) - continue; - len = strlen(buf); - if (len > 0 && buf[len-1] == '/') - buf[--len] = '\0'; + 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 (!strncmp(path, buf, len) && - path[len] == '/' && - len > max_len) { + if (len > max_len) max_len = len; - } } return max_len; |