NetBSD/usr.bin/sort/sort.c

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/* $NetBSD: sort.c,v 1.27 2001/05/14 21:52:21 jdolecek Exp $ */
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/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Peter McIlroy.
*
* 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 acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
/* Sort sorts a file using an optional user-defined key.
* Sort uses radix sort for internal sorting, and allows
* a choice of merge sort and radix sort for external sorting.
*/
#include "sort.h"
#include "fsort.h"
#include "pathnames.h"
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
__RCSID("$NetBSD: sort.c,v 1.27 2001/05/14 21:52:21 jdolecek Exp $");
__SCCSID("@(#)sort.c 8.1 (Berkeley) 6/6/93");
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
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#include <paths.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <locale.h>
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int REC_D = '\n';
u_char d_mask[NBINS]; /* flags for rec_d, field_d, <blank> */
/*
* weight tables. Gweights is one of ascii, Rascii..
* modified to weight rec_d = 0 (or 255)
*/
u_char ascii[NBINS], Rascii[NBINS], RFtable[NBINS], Ftable[NBINS];
int SINGL_FLD = 0, SEP_FLAG = 0, UNIQUE = 0;
struct coldesc clist[(ND+1)*2];
int ncols = 0;
extern struct coldesc clist[(ND+1)*2];
extern int ncols;
/*
* Default to stable sort.
*/
int stable_sort = 1;
char toutpath[MAXPATHLEN];
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const char *tmpdir; /* where temporary files should be put */
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static void cleanup __P((void));
static void onsignal __P((int));
static void usage __P((const char *));
static void many_files __P((void));
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int main __P((int argc, char **argv));
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int
main(argc, argv)
int argc;
char *argv[];
{
get_func_t get;
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int ch, i, stdinflag = 0, tmp = 0;
char cflag = 0, mflag = 0;
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char *outfile, *outpath = 0;
struct field fldtab[ND+2], *ftpos;
struct filelist filelist;
FILE *outfp = NULL;
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setlocale(LC_ALL, "");
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memset(fldtab, 0, (ND+2)*sizeof(struct field));
memset(d_mask, 0, NBINS);
d_mask[REC_D = '\n'] = REC_D_F;
SINGL_FLD = SEP_FLAG = 0;
d_mask['\t'] = d_mask[' '] = BLANK | FLD_D;
ftpos = fldtab;
many_files();
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fixit(&argc, argv);
if (!(tmpdir = getenv("TMPDIR")))
tmpdir = _PATH_TMP;
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while ((ch = getopt(argc, argv, "bcdfik:mHno:rR:sSt:T:ux")) != -1) {
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switch (ch) {
case 'b':
fldtab->flags |= BI | BT;
break;
case 'c':
cflag = 1;
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break;
case 'd': case 'f': case 'i': case 'n': case 'r':
tmp |= optval(ch, 0);
if ((tmp & R) && (tmp & F))
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fldtab->weights = RFtable;
else if (tmp & F)
fldtab->weights = Ftable;
else if (tmp & R)
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fldtab->weights = Rascii;
fldtab->flags |= tmp;
break;
case 'H':
PANIC = 0;
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break;
case 'k':
setfield(optarg, ++ftpos, fldtab->flags);
break;
case 'm':
mflag = 1;
break;
case 'o':
outpath = optarg;
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break;
case 's':
/* for GNU sort compatibility (this is our default) */
stable_sort = 1;
break;
case 'S':
stable_sort = 0;
break;
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case 't':
if (SEP_FLAG)
usage("multiple field delimiters");
SEP_FLAG = 1;
d_mask[' '] &= ~FLD_D;
d_mask['\t'] &= ~FLD_D;
d_mask[(u_char)*optarg] |= FLD_D;
if (d_mask[(u_char)*optarg] & REC_D_F)
errx(2, "record/field delimiter clash");
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break;
case 'R':
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if (REC_D != '\n')
usage("multiple record delimiters");
if ('\n' == (REC_D = *optarg))
break;
d_mask['\n'] = d_mask[' '];
d_mask[REC_D] = REC_D_F;
break;
case 'T':
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/* -T tmpdir */
tmpdir = optarg;
break;
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case 'u':
UNIQUE = 1;
break;
case '?':
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default:
usage(NULL);
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}
}
if (cflag && argc > optind+1)
errx(2, "too many input files for -c option");
if (argc - 2 > optind && !strcmp(argv[argc-2], "-o")) {
outpath = argv[argc-1];
argc -= 2;
}
if (mflag && argc - optind > (MAXFCT - (16+1))*16)
errx(2, "too many input files for -m option");
for (i = optind; i < argc; i++) {
/* allow one occurrence of /dev/stdin */
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if (!strcmp(argv[i], "-") || !strcmp(argv[i], _PATH_STDIN)) {
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if (stdinflag)
warnx("ignoring extra \"%s\" in file list",
argv[i]);
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else
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stdinflag = 1;
/* change to /dev/stdin if '-' */
if (argv[i][0] == '-')
argv[i] = _PATH_STDIN;
} else if ((ch = access(argv[i], R_OK)))
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err(2, "%s", argv[i]);
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}
if (!(fldtab->flags & (I|D|N) || fldtab[1].icol.num)) {
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SINGL_FLD = 1;
fldtab[0].icol.num = 1;
} else {
if (!fldtab[1].icol.num) {
fldtab[0].flags &= ~(BI|BT);
setfield("1", ++ftpos, fldtab->flags);
}
fldreset(fldtab);
fldtab[0].flags &= ~F;
}
settables(fldtab[0].flags);
num_init();
fldtab->weights = gweights;
if (optind == argc) {
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static const char * const names[] = { _PATH_STDIN, NULL };
filelist.names = names;
optind--;
} else
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filelist.names = (const char * const *) &argv[optind];
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if (SINGL_FLD)
get = makeline;
else
get = makekey;
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if (cflag) {
order(&filelist, get, fldtab);
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/* NOT REACHED */
}
if (!outpath) {
(void)snprintf(toutpath,
sizeof(toutpath), "%sstdout", _PATH_DEV);
outfile = outpath = toutpath;
outfp = stdout;
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} else if (!(ch = access(outpath, 0)) &&
strncmp(_PATH_DEV, outpath, 5)) {
static const struct sigaction act =
{ onsignal, {{0}}, SA_RESTART | SA_RESETHAND };
static const int sigtable[] = {SIGHUP, SIGINT, SIGPIPE,
SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, 0};
int outfd;
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errno = 0;
if (access(outpath, W_OK))
err(2, "%s", outpath);
(void)snprintf(toutpath, sizeof(toutpath), "%sXXXXXX",
outpath);
if ((outfd = mkstemp(toutpath)) == -1)
err(2, "Cannot create temporary file `%s'", toutpath);
if ((outfp = fdopen(outfd, "w")) == NULL)
err(2, "Cannot open temporary file `%s'", toutpath);
outfile = toutpath;
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(void)atexit(cleanup);
for (i = 0; sigtable[i]; ++i) /* always unlink toutpath */
sigaction(sigtable[i], &act, 0);
} else
outfile = outpath;
if (outfp == NULL && (outfp = fopen(outfile, "w")) == NULL)
err(2, "output file %s", outfile);
if (mflag) {
fmerge(-1, 0, &filelist, argc-optind, get, outfp, putline,
fldtab);
} else
fsort(-1, 0, 0, &filelist, argc-optind, outfp, fldtab);
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if (outfile != outpath) {
if (access(outfile, 0))
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err(2, "%s", outfile);
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(void)unlink(outpath);
if (link(outfile, outpath))
err(2, "cannot link %s: output left in %s",
outpath, outfile);
(void)unlink(outfile);
}
exit(0);
}
static void
onsignal(sig)
int sig;
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{
cleanup();
}
static void
cleanup()
{
if (toutpath[0])
(void)unlink(toutpath);
}
static void
usage(msg)
const char *msg;
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{
if (msg != NULL)
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(void)fprintf(stderr, "sort: %s\n", msg);
(void)fprintf(stderr, "usage: [-o output] [-cmubdfinrsS] [-t char] ");
(void)fprintf(stderr, "[-R char] [-k keydef] ... [files]\n");
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exit(2);
}
static void
many_files()
{
#if 0
struct rlimit rlp_many_files[1];
if (getrlimit(RLIMIT_NOFILE, rlp_many_files) == 0) {
rlp_many_files->rlim_cur = rlp_many_files->rlim_max;
setrlimit(RLIMIT_NOFILE, rlp_many_files);
}
#endif
}