diff options
Diffstat (limited to 'setup.c')
| -rw-r--r-- | setup.c | 52 |
1 files changed, 44 insertions, 8 deletions
@@ -18,14 +18,15 @@ const char *prefix_path(const char *prefix, int len, const char *path) if (normalize_path_copy(sanitized, sanitized)) goto error_out; if (is_absolute_path(orig)) { - size_t len, total; + size_t root_len, len, total; const char *work_tree = get_git_work_tree(); if (!work_tree) goto error_out; len = strlen(work_tree); + root_len = offset_1st_component(work_tree); total = strlen(sanitized) + 1; if (strncmp(sanitized, work_tree, len) || - (sanitized[len] != '\0' && sanitized[len] != '/')) { + (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { error_out: die("'%s' is outside repository", orig); } @@ -321,7 +322,9 @@ const char *setup_git_directory_gently(int *nongit_ok) static char cwd[PATH_MAX+1]; const char *gitdirenv; const char *gitfile_dir; - int len, offset, ceil_offset; + int len, offset, ceil_offset, root_len; + int current_device = 0, one_filesystem = 1; + struct stat buf; /* * Let's assume that we are in a git repository. @@ -389,6 +392,12 @@ const char *setup_git_directory_gently(int *nongit_ok) * etc. */ offset = len = strlen(cwd); + one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); + if (one_filesystem) { + if (stat(".", &buf)) + die_errno("failed to stat '.'"); + current_device = buf.st_dev; + } for (;;) { gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); if (gitfile_dir) { @@ -403,10 +412,11 @@ const char *setup_git_directory_gently(int *nongit_ok) if (!work_tree_env) inside_work_tree = 0; if (offset != len) { - cwd[offset] = '\0'; - setenv(GIT_DIR_ENVIRONMENT, cwd, 1); + root_len = offset_1st_component(cwd); + cwd[offset > root_len ? offset : root_len] = '\0'; + set_git_dir(cwd); } else - setenv(GIT_DIR_ENVIRONMENT, ".", 1); + set_git_dir("."); check_repository_format_gently(nongit_ok); return NULL; } @@ -420,14 +430,34 @@ const char *setup_git_directory_gently(int *nongit_ok) } die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); } - if (chdir("..")) + if (one_filesystem) { + if (stat("..", &buf)) { + cwd[offset] = '\0'; + die_errno("failed to stat '%s/..'", cwd); + } + if (buf.st_dev != current_device) { + if (nongit_ok) { + if (chdir(cwd)) + die_errno("Cannot come back to cwd"); + *nongit_ok = 1; + return NULL; + } + cwd[offset] = '\0'; + die("Not a git repository (or any parent up to mount parent %s)\n" + "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); + } + } + if (chdir("..")) { + cwd[offset] = '\0'; die_errno("Cannot change to '%s/..'", cwd); + } } inside_git_dir = 0; if (!work_tree_env) inside_work_tree = 1; - git_work_tree_cfg = xstrndup(cwd, offset); + root_len = offset_1st_component(cwd); + git_work_tree_cfg = xstrndup(cwd, offset > root_len ? offset : root_len); if (check_repository_format_gently(nongit_ok)) return NULL; if (offset == len) @@ -516,6 +546,12 @@ int check_repository_format(void) return check_repository_format_gently(NULL); } +/* + * Returns the "prefix", a path to the current working directory + * relative to the work tree root, or NULL, if the current working + * directory is not a strict subdirectory of the work tree root. The + * prefix always ends with a '/' character. + */ const char *setup_git_directory(void) { const char *retval = setup_git_directory_gently(NULL); |