diff options
| -rw-r--r-- | setup.c | 22 |
1 files changed, 14 insertions, 8 deletions
@@ -201,26 +201,32 @@ int is_inside_work_tree(void) */ const char *set_work_tree(const char *dir) { - char dir_buffer[PATH_MAX]; - static char buffer[PATH_MAX + 1], *rel = NULL; - int len, postfix_len = strlen(DEFAULT_GIT_DIR_ENVIRONMENT) + 1; + char dir_buffer[PATH_MAX], *rel = NULL; + static char buffer[PATH_MAX + 1]; + int len, suffix_len = strlen(DEFAULT_GIT_DIR_ENVIRONMENT) + 1; /* strip the variable 'dir' of the postfix "/.git" if it has it */ len = strlen(dir); - if (len > postfix_len && !strcmp(dir + len - postfix_len, - "/" DEFAULT_GIT_DIR_ENVIRONMENT)) { - strncpy(dir_buffer, dir, len - postfix_len); + if (len > suffix_len && + !strcmp(dir + len - suffix_len, "/" DEFAULT_GIT_DIR_ENVIRONMENT)) { + if ((len - suffix_len) >= sizeof(dir_buffer)) + die("directory name too long"); + memcpy(dir_buffer, dir, len - suffix_len); + dir_buffer[len - suffix_len] = '\0'; /* are we inside the default work tree? */ rel = get_relative_cwd(buffer, sizeof(buffer), dir_buffer); } + /* if rel is set, the cwd is _not_ the current working tree */ if (rel && *rel) { if (!is_absolute_path(dir)) set_git_dir(make_absolute_path(dir)); dir = dir_buffer; - chdir(dir); - strcat(rel, "/"); + if (chdir(dir)) + die("cannot chdir to %s: %s", dir, strerror(errno)); + else + strcat(rel, "/"); inside_git_dir = 0; } else { rel = NULL; |