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-rw-r--r--entry.c219
1 files changed, 133 insertions, 86 deletions
diff --git a/entry.c b/entry.c
index d72f811580..004182c99d 100644
--- a/entry.c
+++ b/entry.c
@@ -1,25 +1,43 @@
#include "cache.h"
#include "blob.h"
+#include "dir.h"
-static void create_directories(const char *path, struct checkout *state)
+static void create_directories(const char *path, int path_len,
+ const struct checkout *state)
{
- int len = strlen(path);
- char *buf = xmalloc(len + 1);
- const char *slash = path;
+ char *buf = xmalloc(path_len + 1);
+ int len = 0;
- while ((slash = strchr(slash+1, '/')) != NULL) {
- len = slash - path;
- memcpy(buf, path, len);
+ while (len < path_len) {
+ do {
+ buf[len] = path[len];
+ len++;
+ } while (len < path_len && path[len] != '/');
+ if (len >= path_len)
+ break;
buf[len] = 0;
+
+ /*
+ * For 'checkout-index --prefix=<dir>', <dir> is
+ * allowed to be a symlink to an existing directory,
+ * and we set 'state->base_dir_len' below, such that
+ * we test the path components of the prefix with the
+ * stat() function instead of the lstat() function.
+ */
+ if (has_dirs_only_path(buf, len, state->base_dir_len))
+ continue; /* ok, it is already a directory. */
+
+ /*
+ * If this mkdir() would fail, it could be that there
+ * is already a symlink or something else exists
+ * there, therefore we then try to unlink it and try
+ * one more time to create the directory.
+ */
if (mkdir(buf, 0777)) {
- if (errno == EEXIST) {
- struct stat st;
- if (len > state->base_dir_len && state->force && !unlink(buf) && !mkdir(buf, 0777))
- continue;
- if (!stat(buf, &st) && S_ISDIR(st.st_mode))
- continue; /* ok */
- }
- die("cannot create directory at %s", buf);
+ if (errno == EEXIST && state->force &&
+ !unlink_or_warn(buf) && !mkdir(buf, 0777))
+ continue;
+ die_errno("cannot create directory at '%s'", buf);
}
}
free(buf);
@@ -31,29 +49,27 @@ static void remove_subtree(const char *path)
struct dirent *de;
char pathbuf[PATH_MAX];
char *name;
-
+
if (!dir)
- die("cannot opendir %s", path);
+ die_errno("cannot opendir '%s'", path);
strcpy(pathbuf, path);
name = pathbuf + strlen(path);
*name++ = '/';
while ((de = readdir(dir)) != NULL) {
struct stat st;
- if ((de->d_name[0] == '.') &&
- ((de->d_name[1] == 0) ||
- ((de->d_name[1] == '.') && de->d_name[2] == 0)))
+ if (is_dot_or_dotdot(de->d_name))
continue;
strcpy(name, de->d_name);
if (lstat(pathbuf, &st))
- die("cannot lstat %s", pathbuf);
+ die_errno("cannot lstat '%s'", pathbuf);
if (S_ISDIR(st.st_mode))
remove_subtree(pathbuf);
else if (unlink(pathbuf))
- die("cannot unlink %s", pathbuf);
+ die_errno("cannot unlink '%s'", pathbuf);
}
closedir(dir);
if (rmdir(path))
- die("cannot rmdir %s", path);
+ die_errno("cannot rmdir '%s'", path);
}
static int create_file(const char *path, unsigned int mode)
@@ -62,94 +78,121 @@ static int create_file(const char *path, unsigned int mode)
return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
}
-static int write_entry(struct cache_entry *ce, char *path, struct checkout *state, int to_tempfile)
+static void *read_blob_entry(struct cache_entry *ce, unsigned long *size)
{
- int fd;
- void *new;
- unsigned long size;
- long wrote;
enum object_type type;
+ void *new = read_sha1_file(ce->sha1, &type, size);
- new = read_sha1_file(ce->sha1, &type, &size);
- if (!new || type != OBJ_BLOB) {
- if (new)
- free(new);
- return error("git-checkout-index: unable to read sha1 file of %s (%s)",
- path, sha1_to_hex(ce->sha1));
+ if (new) {
+ if (type == OBJ_BLOB)
+ return new;
+ free(new);
}
- switch (ntohl(ce->ce_mode) & S_IFMT) {
- char *buf;
- unsigned long nsize;
+ return NULL;
+}
+static int write_entry(struct cache_entry *ce, char *path, const struct checkout *state, int to_tempfile)
+{
+ unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT;
+ int fd, ret, fstat_done = 0;
+ char *new;
+ struct strbuf buf = STRBUF_INIT;
+ unsigned long size;
+ size_t wrote, newsize = 0;
+ struct stat st;
+
+ switch (ce_mode_s_ifmt) {
case S_IFREG:
- if (to_tempfile) {
- strcpy(path, ".merge_file_XXXXXX");
- fd = mkstemp(path);
- } else
- fd = create_file(path, ntohl(ce->ce_mode));
- if (fd < 0) {
+ case S_IFLNK:
+ new = read_blob_entry(ce, &size);
+ if (!new)
+ return error("git checkout-index: unable to read sha1 file of %s (%s)",
+ path, sha1_to_hex(ce->sha1));
+
+ if (ce_mode_s_ifmt == S_IFLNK && has_symlinks && !to_tempfile) {
+ ret = symlink(new, path);
free(new);
- return error("git-checkout-index: unable to create file %s (%s)",
- path, strerror(errno));
+ if (ret)
+ return error("git checkout-index: unable to create symlink %s (%s)",
+ path, strerror(errno));
+ break;
}
/*
* Convert from git internal format to working tree format
*/
- buf = new;
- nsize = size;
- if (convert_to_working_tree(ce->name, &buf, &nsize)) {
+ if (ce_mode_s_ifmt == S_IFREG &&
+ convert_to_working_tree(ce->name, new, size, &buf)) {
+ free(new);
+ new = strbuf_detach(&buf, &newsize);
+ size = newsize;
+ }
+
+ if (to_tempfile) {
+ if (ce_mode_s_ifmt == S_IFREG)
+ strcpy(path, ".merge_file_XXXXXX");
+ else
+ strcpy(path, ".merge_link_XXXXXX");
+ fd = mkstemp(path);
+ } else if (ce_mode_s_ifmt == S_IFREG) {
+ fd = create_file(path, ce->ce_mode);
+ } else {
+ fd = create_file(path, 0666);
+ }
+ if (fd < 0) {
free(new);
- new = buf;
- size = nsize;
+ return error("git checkout-index: unable to create file %s (%s)",
+ path, strerror(errno));
}
wrote = write_in_full(fd, new, size);
+ /* use fstat() only when path == ce->name */
+ if (fstat_is_reliable() &&
+ state->refresh_cache && !to_tempfile && !state->base_dir_len) {
+ fstat(fd, &st);
+ fstat_done = 1;
+ }
close(fd);
free(new);
if (wrote != size)
- return error("git-checkout-index: unable to write file %s", path);
+ return error("git checkout-index: unable to write file %s", path);
break;
- case S_IFLNK:
- if (to_tempfile || !has_symlinks) {
- if (to_tempfile) {
- strcpy(path, ".merge_link_XXXXXX");
- fd = mkstemp(path);
- } else
- fd = create_file(path, 0666);
- if (fd < 0) {
- free(new);
- return error("git-checkout-index: unable to create "
- "file %s (%s)", path, strerror(errno));
- }
- wrote = write_in_full(fd, new, size);
- close(fd);
- free(new);
- if (wrote != size)
- return error("git-checkout-index: unable to write file %s",
- path);
- } else {
- wrote = symlink(new, path);
- free(new);
- if (wrote)
- return error("git-checkout-index: unable to create "
- "symlink %s (%s)", path, strerror(errno));
- }
+ case S_IFGITLINK:
+ if (to_tempfile)
+ return error("git checkout-index: cannot create temporary subproject %s", path);
+ if (mkdir(path, 0777) < 0)
+ return error("git checkout-index: cannot create subproject directory %s", path);
break;
default:
- free(new);
- return error("git-checkout-index: unknown file mode for %s", path);
+ return error("git checkout-index: unknown file mode for %s", path);
}
if (state->refresh_cache) {
- struct stat st;
- lstat(ce->name, &st);
+ if (!fstat_done)
+ lstat(ce->name, &st);
fill_stat_cache_info(ce, &st);
}
return 0;
}
-int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath)
+/*
+ * This is like 'lstat()', except it refuses to follow symlinks
+ * in the path, after skipping "skiplen".
+ */
+static int check_path(const char *path, int len, struct stat *st, int skiplen)
+{
+ const char *slash = path + len;
+
+ while (path < slash && *slash != '/')
+ slash--;
+ if (!has_dirs_only_path(path, slash - path, skiplen)) {
+ errno = ENOENT;
+ return -1;
+ }
+ return lstat(path, st);
+}
+
+int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath)
{
static char path[PATH_MAX + 1];
struct stat st;
@@ -160,9 +203,10 @@ int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath)
memcpy(path, state->base_dir, len);
strcpy(path + len, ce->name);
+ len += ce_namelen(ce);
- if (!lstat(path, &st)) {
- unsigned changed = ce_match_stat(ce, &st, 1);
+ if (!check_path(path, len, &st, state->base_dir_len)) {
+ unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
if (!changed)
return 0;
if (!state->force) {
@@ -177,14 +221,17 @@ int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath)
* to emulate by hand - much easier to let the system
* just do the right thing)
*/
- unlink(path);
if (S_ISDIR(st.st_mode)) {
+ /* If it is a gitlink, leave it alone! */
+ if (S_ISGITLINK(ce->ce_mode))
+ return 0;
if (!state->force)
return error("%s is a directory", path);
remove_subtree(path);
- }
+ } else if (unlink(path))
+ return error("unable to unlink old '%s' (%s)", path, strerror(errno));
} else if (state->not_new)
return 0;
- create_directories(path, state);
+ create_directories(path, len, state);
return write_entry(ce, path, state, 0);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 11:16:17 +0000