333 lines
8.6 KiB
C
333 lines
8.6 KiB
C
/* $NetBSD: sort.c,v 1.26 2001/04/30 00:25:09 ross Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Peter McIlroy.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* Sort sorts a file using an optional user-defined key.
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* Sort uses radix sort for internal sorting, and allows
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* a choice of merge sort and radix sort for external sorting.
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*/
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#include "sort.h"
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#include "fsort.h"
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#include "pathnames.h"
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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__RCSID("$NetBSD: sort.c,v 1.26 2001/04/30 00:25:09 ross Exp $");
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__SCCSID("@(#)sort.c 8.1 (Berkeley) 6/6/93");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <locale.h>
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int REC_D = '\n';
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u_char d_mask[NBINS]; /* flags for rec_d, field_d, <blank> */
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/*
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* weight tables. Gweights is one of ascii, Rascii..
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* modified to weight rec_d = 0 (or 255)
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*/
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u_char ascii[NBINS], Rascii[NBINS], RFtable[NBINS], Ftable[NBINS];
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int SINGL_FLD = 0, SEP_FLAG = 0, UNIQUE = 0;
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struct coldesc clist[(ND+1)*2];
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int ncols = 0;
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extern struct coldesc clist[(ND+1)*2];
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extern int ncols;
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/*
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* Default to stable sort.
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*/
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int stable_sort = 1;
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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));
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static void onsignal __P((int));
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static void usage __P((const char *));
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static void many_files __P((void));
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int main __P((int argc, char **argv));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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get_func_t get;
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int ch, i, stdinflag = 0, tmp = 0;
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char cflag = 0, mflag = 0;
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char *outfile, *outpath = 0;
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struct field fldtab[ND+2], *ftpos;
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struct filelist filelist;
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FILE *outfp = NULL;
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setlocale(LC_ALL, "");
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memset(fldtab, 0, (ND+2)*sizeof(struct field));
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memset(d_mask, 0, NBINS);
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d_mask[REC_D = '\n'] = REC_D_F;
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SINGL_FLD = SEP_FLAG = 0;
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d_mask['\t'] = d_mask[' '] = BLANK | FLD_D;
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ftpos = fldtab;
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many_files();
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fixit(&argc, argv);
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if (!(tmpdir = getenv("TMPDIR")))
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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) {
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case 'b':
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fldtab->flags |= BI | BT;
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break;
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case 'c':
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cflag = 1;
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break;
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case 'd': case 'f': case 'i': case 'n': case 'r':
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tmp |= optval(ch, 0);
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if ((tmp & R) && (tmp & F))
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fldtab->weights = RFtable;
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else if (tmp & F)
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fldtab->weights = Ftable;
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else if (tmp & R)
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fldtab->weights = Rascii;
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fldtab->flags |= tmp;
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break;
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case 'H':
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PANIC = 0;
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break;
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case 'k':
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setfield(optarg, ++ftpos, fldtab->flags);
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break;
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case 'm':
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mflag = 1;
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break;
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case 'o':
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outpath = optarg;
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break;
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case 's':
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/* for GNU sort compatibility (this is our default) */
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stable_sort = 1;
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break;
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case 'S':
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stable_sort = 0;
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break;
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case 't':
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if (SEP_FLAG)
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usage("multiple field delimiters");
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SEP_FLAG = 1;
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d_mask[' '] &= ~FLD_D;
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d_mask['\t'] &= ~FLD_D;
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d_mask[(u_char)*optarg] |= FLD_D;
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if (d_mask[(u_char)*optarg] & REC_D_F)
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errx(2, "record/field delimiter clash");
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break;
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case 'R':
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if (REC_D != '\n')
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usage("multiple record delimiters");
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if ('\n' == (REC_D = *optarg))
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break;
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d_mask['\n'] = d_mask[' '];
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d_mask[REC_D] = REC_D_F;
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break;
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case 'T':
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/* -T tmpdir */
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tmpdir = optarg;
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break;
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case 'u':
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UNIQUE = 1;
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break;
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case '?':
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default:
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usage(NULL);
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}
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}
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if (cflag && argc > optind+1)
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errx(2, "too many input files for -c option");
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if (argc - 2 > optind && !strcmp(argv[argc-2], "-o")) {
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outpath = argv[argc-1];
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argc -= 2;
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}
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if (mflag && argc - optind > (MAXFCT - (16+1))*16)
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errx(2, "too many input files for -m option");
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for (i = optind; i < argc; i++) {
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/* 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)
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warnx("ignoring extra \"%s\" in file list",
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argv[i]);
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else
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stdinflag = 1;
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/* change to /dev/stdin if '-' */
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if (argv[i][0] == '-')
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argv[i] = _PATH_STDIN;
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} else if ((ch = access(argv[i], R_OK)))
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err(2, "%s", argv[i]);
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}
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if (!(fldtab->flags & (I|D|N) || fldtab[1].icol.num)) {
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SINGL_FLD = 1;
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fldtab[0].icol.num = 1;
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} else {
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if (!fldtab[1].icol.num) {
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fldtab[0].flags &= ~(BI|BT);
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setfield("1", ++ftpos, fldtab->flags);
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}
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fldreset(fldtab);
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fldtab[0].flags &= ~F;
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}
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settables(fldtab[0].flags);
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num_init();
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fldtab->weights = gweights;
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if (optind == argc) {
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static const char * const names[] = { _PATH_STDIN, NULL };
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filelist.names = names;
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optind--;
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} else
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filelist.names = (const char * const *) &argv[optind];
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if (SINGL_FLD)
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get = makeline;
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else
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get = makekey;
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if (cflag) {
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order(&filelist, get, fldtab);
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/* NOT REACHED */
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}
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if (!outpath) {
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(void)snprintf(toutpath,
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sizeof(toutpath), "%sstdout", _PATH_DEV);
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outfile = outpath = toutpath;
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outfp = stdout;
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} else if (!(ch = access(outpath, 0)) &&
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strncmp(_PATH_DEV, outpath, 5)) {
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static const struct sigaction act =
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{ onsignal, {{0}}, SA_RESTART | SA_RESETHAND };
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static const int sigtable[] = {SIGHUP, SIGINT, SIGPIPE,
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SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, 0};
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int outfd;
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errno = 0;
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if (access(outpath, W_OK))
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err(2, "%s", outpath);
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(void)snprintf(toutpath, sizeof(toutpath), "%sXXXXXX",
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outpath);
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if ((outfd = mkstemp(toutpath)) == -1)
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err(2, "Cannot create temporary file `%s'", toutpath);
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if ((outfp = fdopen(outfd, "w")) == NULL)
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err(2, "Cannot open temporary file `%s'", toutpath);
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outfile = toutpath;
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(void)atexit(cleanup);
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for (i = 0; sigtable[i]; ++i) /* always unlink toutpath */
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sigaction(sigtable[i], &act, 0);
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} else
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outfile = outpath;
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if (outfp == NULL && (outfp = fopen(outfile, "w")) == NULL)
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err(2, "output file %s", outfile);
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if (mflag) {
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fmerge(-1, 0, &filelist, argc-optind, get, outfp, putline,
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fldtab);
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} else
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fsort(-1, 0, 0, &filelist, argc-optind, outfp, fldtab);
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if (outfile != outpath) {
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if (access(outfile, 0))
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err(2, "%s", outfile);
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(void)unlink(outpath);
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if (link(outfile, outpath))
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err(2, "cannot link %s: output left in %s",
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outpath, outfile);
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(void)unlink(outfile);
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}
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exit(0);
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}
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static void
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onsignal(sig)
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int sig;
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{
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cleanup();
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}
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static void
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cleanup()
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{
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if (toutpath[0])
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(void)unlink(toutpath);
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}
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static void
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usage(msg)
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const char *msg;
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{
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if (msg != NULL)
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(void)fprintf(stderr, "sort: %s\n", msg);
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(void)fprintf(stderr, "usage: [-o output] [-cmubdfinrsS] [-t char] ");
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(void)fprintf(stderr, "[-R char] [-k keydef] ... [files]\n");
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exit(2);
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}
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static void
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many_files()
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{
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#if 0
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struct rlimit rlp_many_files[1];
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if (getrlimit(RLIMIT_NOFILE, rlp_many_files) == 0) {
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rlp_many_files->rlim_cur = rlp_many_files->rlim_max;
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setrlimit(RLIMIT_NOFILE, rlp_many_files);
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}
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#endif
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}
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