From: Thomas Cort Date: Sun, 2 Jun 2013 19:45:38 +0000 (+0000) Subject: Importing usr.bin/shuffle X-Git-Tag: v3.3.0~931 X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=3d257f8073b880072e0ec184a347196ecfd0afd5;p=minix.git Importing usr.bin/shuffle --- diff --git a/distrib/sets/lists/minix/mi b/distrib/sets/lists/minix/mi index 54cb49020..6ffeb55a6 100644 --- a/distrib/sets/lists/minix/mi +++ b/distrib/sets/lists/minix/mi @@ -410,6 +410,7 @@ ./usr/bin/seq minix-sys ./usr/bin/sha1 minix-sys ./usr/bin/shar minix-sys +./usr/bin/shuffle minix-sys ./usr/bin/shutdown minix-sys ./usr/bin/sleep minix-sys ./usr/bin/slip minix-sys @@ -1396,6 +1397,7 @@ ./usr/man/man1/sha1.1 minix-sys ./usr/man/man1/shar.1 minix-sys ./usr/man/man1/shift.1 minix-sys +./usr/man/man1/shuffle.1 minix-sys ./usr/man/man1/sleep.1 minix-sys ./usr/man/man1/sort.1 minix-sys ./usr/man/man1/spell.1 minix-sys diff --git a/releasetools/nbsd_ports b/releasetools/nbsd_ports index 317234489..2f7e1d719 100644 --- a/releasetools/nbsd_ports +++ b/releasetools/nbsd_ports @@ -162,6 +162,7 @@ 2012/10/17 12:00:00,usr.bin/printf 2010/02/19 16:35:27,usr.bin/sed 2010/05/27 08:40:19,usr.bin/seq +2013/06/02 12:00:00,usr.bin/shuffle 2012/10/17 12:00:00,usr.bin/sort 2011/01/15 22:54:10,usr.bin/stat 2012/02/10 16:16:12,usr.bin/su diff --git a/usr.bin/Makefile b/usr.bin/Makefile index c8bf4dc81..502f64d50 100644 --- a/usr.bin/Makefile +++ b/usr.bin/Makefile @@ -23,7 +23,7 @@ SUBDIR= \ printf \ \ \ - sed seq \ + shuffle sed seq \ sort stat su \ tic tput \ tsort \ diff --git a/usr.bin/shuffle/Makefile b/usr.bin/shuffle/Makefile new file mode 100644 index 000000000..e5e1c4ef2 --- /dev/null +++ b/usr.bin/shuffle/Makefile @@ -0,0 +1,8 @@ +# $NetBSD: Makefile,v 1.2 2006/08/26 18:17:43 christos Exp $ + +PROG= shuffle + +LDADD+=-lutil +DPADD+=${LIBUTIL} + +.include diff --git a/usr.bin/shuffle/shuffle.1 b/usr.bin/shuffle/shuffle.1 new file mode 100644 index 000000000..0d1263afa --- /dev/null +++ b/usr.bin/shuffle/shuffle.1 @@ -0,0 +1,104 @@ +.\" $NetBSD: shuffle.1,v 1.8 2009/02/19 10:08:15 wiz Exp $ +.\" +.\" Copyright (c) 1998 +.\" Perry E. Metzger. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgment: +.\" This product includes software developed for the NetBSD Project +.\" by Perry E. Metzger. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, +.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" +.\" +.Dd February 18, 2009 +.Dt SHUFFLE 1 +.Os +.Sh NAME +.Nm shuffle +.Nd print a random permutation of the command line arguments +.Sh SYNOPSIS +.Nm +.Op Fl 0 +.Op Fl f Ar filename ... +.Op Fl n Ar number +.Op Fl p Ar number +.Op Ar arg +.Op Ar ... +.Sh DESCRIPTION +The +.Nm +program prints a random permutation (or +.Dq shuffle ) +of its command line arguments. +This can be useful in shell scripts for selecting a +random order in which to do a set of tasks, view a set of files, etc. +.Pp +If the +.Fl f +option is given, the data is taken from that files' contents or if the +filename is +.Ar - +.Dq stdin . +.Pp +If the +.Fl n +option is given, its argument is treated as a number, and the program +prints a random permutation of the numbers greater than or equal to 0 +and less than the argument. +.Pp +If the +.Fl p +option is given, its argument is treated as a number, and the program +prints that number of randomly selected lines or arguments in a random order. +.Pp +The +.Fl 0 +option changes the field separator character from \en to \e0, so that +the output is suitable to be sent to +.Xr xargs 1 +(to handle filenames with whitespace in them). +.Sh EXAMPLES +.Bd -literal -offset indent +$ shuffle a b c d +c +b +d +a +$ shuffle -p 1 a b c d +d +$ shuffle -n 4 -p 2 +0 +3 +.Ed +.Sh SEE ALSO +.Xr jot 1 , +.Xr random 6 +.Sh HISTORY +The +.Nm +program first appeared in +.Nx 1.4 . +.Sh AUTHORS +Written by +.An Perry E. Metzger +.Aq perry@piermont.com . diff --git a/usr.bin/shuffle/shuffle.c b/usr.bin/shuffle/shuffle.c new file mode 100644 index 000000000..d1fa8138a --- /dev/null +++ b/usr.bin/shuffle/shuffle.c @@ -0,0 +1,220 @@ +/* $NetBSD: shuffle.c,v 1.21 2011/09/16 15:39:29 joerg Exp $ */ + +/* + * Copyright (c) 1998 + * Perry E. Metzger. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgment: + * This product includes software developed for the NetBSD Project + * by Perry E. Metzger. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#ifndef lint +__RCSID("$NetBSD: shuffle.c,v 1.21 2011/09/16 15:39:29 joerg Exp $"); +#endif /* not lint */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +static size_t *get_shuffle(size_t); +__dead static void usage(void); +static void get_lines(const char *, char ***, size_t *); +static size_t get_number(const char *, int); + +/* + * get_shuffle -- + * Construct a random shuffle array of t elements + */ +static size_t * +get_shuffle(size_t t) +{ + size_t *shuffle; + size_t i, j, k, temp; + + shuffle = emalloc(t * sizeof(size_t)); + + for (i = 0; i < t; i++) + shuffle[i] = i; + + /* + * This algorithm taken from Knuth, Seminumerical Algorithms, + * 2nd Ed., page 139. + */ + + for (j = t - 1; j > 0; j--) { + k = arc4random() % (j + 1); + temp = shuffle[j]; + shuffle[j] = shuffle[k]; + shuffle[k] = temp; + } + + return shuffle; +} + +/* + * usage -- + * Print a usage message and exit + */ +static void +usage(void) +{ + + (void) fprintf(stderr, + "usage: %s [-0] [-f ] [-n ] [-p ] [ ...]\n", + getprogname()); + exit(1); +} + + +/* + * get_lines -- + * Return an array of lines read from input + */ +static void +get_lines(const char *fname, char ***linesp, size_t *nlinesp) +{ + FILE *fp; + char *line; + size_t size, nlines = 0, maxlines = 128; + char **lines = emalloc(sizeof(char *) * maxlines); + + if (strcmp(fname, "-") == 0) + fp = stdin; + else + if ((fp = fopen(fname, "r")) == NULL) + err(1, "Cannot open `%s'", fname); + + while ((line = fgetln(fp, &size)) != NULL) { + if (size > 0 && line[size - 1] == '\n') + size--; + lines[nlines] = emalloc(size + 1); + (void)memcpy(lines[nlines], line, size); + lines[nlines++][size] = '\0'; + if (nlines >= maxlines) { + maxlines *= 2; + lines = erealloc(lines, (sizeof(char *) * maxlines)); + } + } + lines[nlines] = NULL; + + *linesp = lines; + *nlinesp = nlines; + if (strcmp(fname, "-") != 0) + (void)fclose(fp); +} + +/* + * get_number -- + * Return a number or exit on error + */ +static size_t +get_number(const char *str, int ch) +{ + char *estr; + long number; + + errno = 0; + number = strtol(str, &estr, 0); + if ((number == LONG_MIN || number == LONG_MAX) && errno == ERANGE) + err(1, "bad -%c argument `%s'", ch, str); + if (*estr) + errx(1, "non numeric -%c argument `%s'", ch, str); + if (number < 0) + errx(1, "negative -%c argument `%s'", ch, str); + return (size_t) number; +} + +int +main(int argc, char *argv[]) +{ + int nflag = 0, pflag = 0, ch; + char *fname = NULL; + size_t *shuffle = NULL; + char **lines = NULL; + size_t nlines = 0, pick = 0, i; + char sep = '\n'; + + while ((ch = getopt(argc, argv, "0f:n:p:")) != -1) { + switch(ch) { + case '0': + sep = '\0'; + break; + case 'f': + fname = optarg; + break; + case 'n': + nlines = get_number(optarg, ch); + nflag = 1; + break; + case 'p': + pick = get_number(optarg, ch); + pflag = 1; + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if ((fname && nflag) || (nflag && (argc > 0))) + usage(); + + if (fname != NULL) + get_lines(fname, &lines, &nlines); + else if (nflag == 0) { + lines = argv; + nlines = argc; + } + + if (nlines > 0) + shuffle = get_shuffle(nlines); + + if (pflag) { + if (pick > nlines) + errx(1, "-p specified more components than exist."); + nlines = pick; + } + + for (i = 0; i < nlines; i++) { + if (nflag) + printf("%ld", (long)shuffle[i]); + else + printf("%s", lines[shuffle[i]]); + putc(sep, stdout); + } + + return 0; +}