diff options
Diffstat (limited to 'sys-utils/pivot_root.c')
| -rw-r--r-- | sys-utils/pivot_root.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/sys-utils/pivot_root.c b/sys-utils/pivot_root.c index acc105621..ee6fd3c19 100644 --- a/sys-utils/pivot_root.c +++ b/sys-utils/pivot_root.c @@ -27,20 +27,21 @@ #define pivot_root(new_root,put_old) syscall(SYS_pivot_root,new_root,put_old) -static void __attribute__ ((__noreturn__)) usage(FILE * out) +static void __attribute__((__noreturn__)) usage(void) { - fprintf(out, USAGE_HEADER); + FILE *out = stdout; + fputs(USAGE_HEADER, out); fprintf(out, _(" %s [options] new_root put_old\n"), program_invocation_short_name); fputs(USAGE_SEPARATOR, out); fputs(_("Change the root filesystem.\n"), out); - fprintf(out, USAGE_OPTIONS); - fprintf(out, USAGE_HELP); - fprintf(out, USAGE_VERSION); + fputs(USAGE_OPTIONS, out); + fputs(USAGE_HELP, out); + fputs(USAGE_VERSION, out); fprintf(out, USAGE_MAN_TAIL("pivot_root(8)")); - exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); + exit(EXIT_SUCCESS); } int main(int argc, char **argv) @@ -63,14 +64,15 @@ int main(int argc, char **argv) printf(UTIL_LINUX_VERSION); return EXIT_SUCCESS; case 'h': - usage(stdout); + usage(); default: errtryhelp(EXIT_FAILURE); } - if (argc != 3) - usage(stderr); - + if (argc != 3) { + warnx(_("bad usage")); + errtryhelp(EXIT_FAILURE); + } if (pivot_root(argv[1], argv[2]) < 0) err(EXIT_FAILURE, _("failed to change root from `%s' to `%s'"), argv[1], argv[2]); |