diff options
Diffstat (limited to 'entry.c')
| -rw-r--r-- | entry.c | 240 |
1 files changed, 168 insertions, 72 deletions
@@ -1,16 +1,21 @@ #include "cache.h" #include "blob.h" #include "dir.h" +#include "streaming.h" -static void create_directories(const char *path, const 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; /* @@ -20,7 +25,7 @@ static void create_directories(const char *path, const struct checkout *state) * we test the path components of the prefix with the * stat() function instead of the lstat() function. */ - if (has_dirs_only_path(len, buf, state->base_dir_len)) + if (has_dirs_only_path(buf, len, state->base_dir_len)) continue; /* ok, it is already a directory. */ /* @@ -31,9 +36,9 @@ static void create_directories(const char *path, 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); @@ -47,7 +52,7 @@ static void remove_subtree(const char *path) 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++ = '/'; @@ -57,15 +62,15 @@ static void remove_subtree(const char *path) 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) @@ -74,7 +79,7 @@ static int create_file(const char *path, unsigned int mode) return open(path, O_WRONLY | O_CREAT | O_EXCL, mode); } -static void *read_blob_entry(struct cache_entry *ce, const char *path, unsigned long *size) +static void *read_blob_entry(struct cache_entry *ce, unsigned long *size) { enum object_type type; void *new = read_sha1_file(ce->sha1, &type, size); @@ -87,98 +92,188 @@ static void *read_blob_entry(struct cache_entry *ce, const char *path, unsigned 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) { - int fd; - long wrote; + 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->ce_mode & S_IFMT) { - char *new; - struct strbuf buf; - unsigned long size; + 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: - new = read_blob_entry(ce, path, &size); + 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("unable to create symlink %s (%s)", + path, strerror(errno)); + break; + } + /* * Convert from git internal format to working tree format */ - strbuf_init(&buf, 0); - if (convert_to_working_tree(ce->name, new, size, &buf)) { - size_t newsize = 0; + 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) { - strcpy(path, ".merge_file_XXXXXX"); - fd = mkstemp(path); - } else - fd = create_file(path, ce->ce_mode); + 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); + 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); - break; - case S_IFLNK: - new = read_blob_entry(ce, path, &size); - if (!new) - return error("git checkout-index: unable to read sha1 file of %s (%s)", - path, sha1_to_hex(ce->sha1)); - 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)); - } + 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) { - struct stat st; - lstat(ce->name, &st); + if (!fstat_done) + lstat(ce->name, &st); fill_stat_cache_info(ce, &st); } 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]; @@ -190,14 +285,15 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t 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, 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; } @@ -218,6 +314,6 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t 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); } |