![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
index 915514aa5c43d3fd39f077a79f63ac27b841d255..852fea13955475c1e2fda9cfc25a63a54a1f61c7 100644 (file)
--- a/entry.c
+++ b/entry.c
#include "cache.h"
#include "blob.h"
#include "dir.h"
+#include "streaming.h"
static void create_directories(const char *path, int path_len,
const struct checkout *state)
*/
if (mkdir(buf, 0777)) {
if (errno == EEXIST && state->force &&
- !unlink(buf) && !mkdir(buf, 0777))
+ !unlink_or_warn(buf) && !mkdir(buf, 0777))
continue;
- die("cannot create directory at %s", buf);
+ die_errno("cannot create directory at '%s'", buf);
}
}
free(buf);
char *name;
if (!dir)
- die("cannot opendir %s (%s)", path, strerror(errno));
+ die_errno("cannot opendir '%s'", path);
strcpy(pathbuf, path);
name = pathbuf + strlen(path);
*name++ = '/';
continue;
strcpy(name, de->d_name);
if (lstat(pathbuf, &st))
- die("cannot lstat %s (%s)", pathbuf, strerror(errno));
+ die_errno("cannot lstat '%s'", pathbuf);
if (S_ISDIR(st.st_mode))
remove_subtree(pathbuf);
else if (unlink(pathbuf))
- die("cannot unlink %s (%s)", pathbuf, strerror(errno));
+ die_errno("cannot unlink '%s'", pathbuf);
}
closedir(dir);
if (rmdir(path))
- die("cannot rmdir %s (%s)", path, strerror(errno));
+ die_errno("cannot rmdir '%s'", path);
}
static int create_file(const char *path, unsigned int mode)
return NULL;
}
+static int open_output_fd(char *path, struct cache_entry *ce, int to_tempfile)
+{
+ int symlink = (ce->ce_mode & S_IFMT) != S_IFREG;
+ if (to_tempfile) {
+ strcpy(path, symlink
+ ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
+ return mkstemp(path);
+ } else {
+ return create_file(path, !symlink ? ce->ce_mode : 0666);
+ }
+}
+
+static int fstat_output(int fd, const struct checkout *state, struct stat *st)
+{
+ /* use fstat() only when path == ce->name */
+ if (fstat_is_reliable() &&
+ state->refresh_cache && !state->base_dir_len) {
+ fstat(fd, st);
+ return 1;
+ }
+ return 0;
+}
+
+static int streaming_write_entry(struct cache_entry *ce, char *path,
+ struct stream_filter *filter,
+ const struct checkout *state, int to_tempfile,
+ int *fstat_done, struct stat *statbuf)
+{
+ struct git_istream *st;
+ enum object_type type;
+ unsigned long sz;
+ int result = -1;
+ ssize_t kept = 0;
+ int fd = -1;
+
+ st = open_istream(ce->sha1, &type, &sz, filter);
+ if (!st)
+ return -1;
+ if (type != OBJ_BLOB)
+ goto close_and_exit;
+
+ fd = open_output_fd(path, ce, to_tempfile);
+ if (fd < 0)
+ goto close_and_exit;
+
+ for (;;) {
+ char buf[1024 * 16];
+ ssize_t wrote, holeto;
+ ssize_t readlen = read_istream(st, buf, sizeof(buf));
+
+ if (!readlen)
+ break;
+ if (sizeof(buf) == readlen) {
+ for (holeto = 0; holeto < readlen; holeto++)
+ if (buf[holeto])
+ break;
+ if (readlen == holeto) {
+ kept += holeto;
+ continue;
+ }
+ }
+
+ if (kept && lseek(fd, kept, SEEK_CUR) == (off_t) -1)
+ goto close_and_exit;
+ else
+ kept = 0;
+ wrote = write_in_full(fd, buf, readlen);
+
+ if (wrote != readlen)
+ goto close_and_exit;
+ }
+ if (kept && (lseek(fd, kept - 1, SEEK_CUR) == (off_t) -1 ||
+ write(fd, "", 1) != 1))
+ goto close_and_exit;
+ *fstat_done = fstat_output(fd, state, statbuf);
+
+close_and_exit:
+ close_istream(st);
+ if (0 <= fd)
+ result = close(fd);
+ if (result && 0 <= fd)
+ unlink(path);
+ return result;
+}
+
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;
@@ -101,19 +187,28 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout
size_t wrote, newsize = 0;
struct stat st;
+ if (ce_mode_s_ifmt == S_IFREG) {
+ struct stream_filter *filter = get_stream_filter(path, ce->sha1);
+ if (filter &&
+ !streaming_write_entry(ce, path, filter,
+ state, to_tempfile,
+ &fstat_done, &st))
+ goto finish;
+ }
+
switch (ce_mode_s_ifmt) {
case S_IFREG:
case S_IFLNK:
new = read_blob_entry(ce, &size);
if (!new)
- return error("git checkout-index: unable to read sha1 file of %s (%s)",
+ return error("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);
if (ret)
- return error("git checkout-index: unable to create symlink %s (%s)",
+ return error("unable to create symlink %s (%s)",
path, strerror(errno));
break;
}
@@ -128,45 +223,32 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout
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);
- }
+ fd = open_output_fd(path, ce, to_tempfile);
if (fd < 0) {
free(new);
- return error("git checkout-index: unable to create file %s (%s)",
+ return error("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;
- }
+ if (!to_tempfile)
+ fstat_done = fstat_output(fd, state, &st);
close(fd);
free(new);
if (wrote != size)
- return error("git checkout-index: unable to write file %s", path);
+ return error("unable to write file %s", path);
break;
case S_IFGITLINK:
if (to_tempfile)
- return error("git checkout-index: cannot create temporary subproject %s", path);
+ return error("cannot create temporary subproject %s", path);
if (mkdir(path, 0777) < 0)
- return error("git checkout-index: cannot create subproject directory %s", path);
+ return error("cannot create subproject directory %s", path);
break;
default:
- return error("git checkout-index: unknown file mode for %s", path);
+ return error("unknown file mode for %s in index", path);
}
+finish:
if (state->refresh_cache) {
if (!fstat_done)
lstat(ce->name, &st);
@@ -175,6 +257,23 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout
return 0;
}
+/*
+ * 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];
@@ -188,13 +287,13 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t
strcpy(path + len, ce->name);
len += ce_namelen(ce);
- if (!lstat(path, &st)) {
- unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID);
+ 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) {
if (!state->quiet)
- fprintf(stderr, "git-checkout-index: %s already exists\n", path);
+ fprintf(stderr, "%s already exists, no checkout\n", path);
return -1;
}