diff options
| -rw-r--r-- | fsck-cache.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fsck-cache.c b/fsck-cache.c index 9867fa658b..e42264e6ce 100644 --- a/fsck-cache.c +++ b/fsck-cache.c @@ -342,6 +342,31 @@ static void fsck_object_dir(const char *path) fsck_sha1_list(); } +static int fsck_head_link(void) +{ + int fd, count; + char hex[40]; + unsigned char sha1[20]; + static char path[PATH_MAX], link[PATH_MAX]; + const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT; + + snprintf(path, sizeof(path), "%s/HEAD", git_dir); + if (readlink(path, link, sizeof(link)) < 0) + return error("HEAD is not a symlink"); + if (strncmp("refs/heads/", link, 11)) + return error("HEAD points to something strange (%s)", link); + fd = open(path, O_RDONLY); + if (fd < 0) + return error("HEAD: %s", strerror(errno)); + count = read(fd, hex, sizeof(hex)); + close(fd); + if (count < 0) + return error("HEAD: %s", strerror(errno)); + if (count < 40 || get_sha1_hex(hex, sha1)) + return error("HEAD: not a valid git pointer"); + return 0; +} + int main(int argc, char **argv) { int i, heads; @@ -382,6 +407,7 @@ int main(int argc, char **argv) if (standalone) unsetenv("GIT_ALTERNATE_OBJECT_DIRECTORIES"); + fsck_head_link(); fsck_object_dir(get_object_directory()); if (check_full) { int j; |