diff options
Diffstat (limited to 'debianutils/which.c')
| -rw-r--r-- | debianutils/which.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/debianutils/which.c b/debianutils/which.c index 3bd54ac42..02f77a216 100644 --- a/debianutils/which.c +++ b/debianutils/which.c @@ -30,12 +30,15 @@ int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int which_main(int argc UNUSED_PARAM, char **argv) { - const char *env_path; + char *env_path; int status = 0; + /* This sizeof(): bb_default_root_path is shorter than BB_PATH_ROOT_PATH */ + char buf[sizeof(BB_PATH_ROOT_PATH)]; env_path = getenv("PATH"); if (!env_path) - env_path = bb_default_root_path; + /* env_path must be writable, and must not alloc, so... */ + env_path = strcpy(buf, bb_default_root_path); getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/); argv += optind; @@ -51,20 +54,17 @@ int which_main(int argc UNUSED_PARAM, char **argv) } } else { char *path; - char *tmp; char *p; - path = tmp = xstrdup(env_path); -//NOFORK FIXME: nested xmallocs (one is inside find_executable()) -//can leak memory on failure - while ((p = find_executable(*argv, &tmp)) != NULL) { + path = env_path; + /* NOFORK NB: xmalloc inside find_executable(), must have no allocs above! */ + while ((p = find_executable(*argv, &path)) != NULL) { missing = 0; puts(p); free(p); if (!option_mask32) /* -a not set */ break; } - free(path); } status |= missing; } while (*++argv); |