shuf: simplify check that we have at least one FILE

function                                             old     new   delta
.rodata                                           103190  103194      +4
packed_usage                                       33541   33537      -4
shred_main                                           354     337     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 4/-21)             Total: -17 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/coreutils/shred.c b/coreutils/shred.c
index 8f3d9c5c9..69fb3e8cc 100644
--- a/coreutils/shred.c
+++ b/coreutils/shred.c
@@ -15,7 +15,7 @@
 //kbuild:lib-$(CONFIG_SHRED) += shred.o
 
 //usage:#define shred_trivial_usage
-//usage:       "FILE..."
+//usage:       "[-fuz] [-n N] FILE..."
 //usage:#define shred_full_usage "\n\n"
 //usage:       "Overwrite/delete FILEs\n"
 //usage:     "\n        -f      Chmod to ensure writability"
@@ -54,16 +54,13 @@ int shred_main(int argc UNUSED_PARAM, char **argv)
                 OPT_x = (1 << 5),
         };
 
-        opt = getopt32(argv, "fuzn:+vx", &num_iter);
+        opt = getopt32(argv, "^" "fuzn:+vx" "\0" "-1"/*min 1 arg*/, &num_iter);
         argv += optind;
 
         zero_fd = xopen("/dev/zero", O_RDONLY);
         if (num_iter != 0)
                 rand_fd = xopen("/dev/urandom", O_RDONLY);
 
-        if (!*argv)
-                bb_show_usage();
-
         for (;;) {
                 struct stat sb;
                 const char *fname;