*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
//config:config SHUF
-//config: bool "shuf"
+//config: bool "shuf (5.4 kb)"
//config: default y
//config: help
-//config: Generate random permutations
+//config: Generate random permutations
-//kbuild:lib-$(CONFIG_SHUF) += shuf.o
//applet:IF_SHUF(APPLET_NOEXEC(shuf, shuf, BB_DIR_USR_BIN, BB_SUID_DROP, shuf))
+//kbuild:lib-$(CONFIG_SHUF) += shuf.o
+
//usage:#define shuf_trivial_usage
//usage: "[-e|-i L-H] [-n NUM] [-o FILE] [-z] [FILE|ARG...]"
//usage:#define shuf_full_usage "\n\n"
-//usage: "Write a random permutation of the input lines to standard output\n"
-//usage: "\n -e Treat each ARG as an input line"
-//usage: "\n -i L-H Treat numbers L-H as an input line"
+//usage: "Randomly permute lines\n"
+//usage: "\n -e Treat ARGs as lines"
+//usage: "\n -i L-H Treat numbers L-H as lines"
//usage: "\n -n NUM Output at most NUM lines"
-//usage: "\n -o FILE Write to FILE instead of standard output"
+//usage: "\n -o FILE Write to FILE, not standard output"
//usage: "\n -z End lines with zero byte, not newline"
#include "libbb.h"
/* RAND_MAX can be as small as 32767 */
if (i > RAND_MAX)
r ^= rand() << 15;
- r %= i;
+ r %= i + 1;
tmp = lines[i];
lines[i] = lines[r];
lines[r] = tmp;
unsigned numlines;
char eol;
- opt_complementary = "e--i:i--e"; /* mutually exclusive */
- opts = getopt32(argv, OPT_STR, &opt_i_str, &opt_n_str, &opt_o_str);
+ opts = getopt32(argv, "^"
+ OPT_STR
+ "\0" "e--i:i--e"/* mutually exclusive */,
+ &opt_i_str, &opt_n_str, &opt_o_str
+ );
argc -= optind;
argv += optind;
*dash = '\0';
lo = xatou(opt_i_str);
hi = xatou(dash + 1);
- *dash = '-';
+ *dash = '-';
if (hi < lo) {
bb_error_msg_and_die("bad range '%s'", opt_i_str);
}