414 lines
11 KiB
C
414 lines
11 KiB
C
/* $NetBSD: sort.c,v 1.60 2010/12/18 23:09:48 christos Exp $ */
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/*-
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* Copyright (c) 2000-2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ben Harris and Jaromir Dolecek.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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. 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 <util.h>
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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\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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__RCSID("$NetBSD: sort.c,v 1.60 2010/12/18 23:09:48 christos Exp $");
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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 *const weight_tables[4] = { ascii, Rascii, Ftable, RFtable };
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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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int REVERSE = 0;
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int posix_sort;
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unsigned int debug_flags = 0;
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static char toutpath[MAXPATHLEN];
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const char *tmpdir; /* where temporary files should be put */
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static void cleanup(void);
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static void onsignal(int);
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static void usage(const char *);
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int main(int argc, char **argv);
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int
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main(int argc, char *argv[])
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{
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int ch, i, stdinflag = 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;
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size_t fldtab_sz, fld_cnt;
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struct filelist filelist;
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int num_input_files;
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FILE *outfp = NULL;
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struct rlimit rl;
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struct stat st;
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setlocale(LC_ALL, "");
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/* bump RLIMIT_NOFILE to maximum our hard limit allows */
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if (getrlimit(RLIMIT_NOFILE, &rl) < 0)
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err(2, "getrlimit");
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rl.rlim_cur = rl.rlim_max;
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if (setrlimit(RLIMIT_NOFILE, &rl) < 0)
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err(2, "setrlimit");
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d_mask[REC_D = '\n'] = REC_D_F;
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d_mask['\t'] = d_mask[' '] = BLANK | FLD_D;
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/* fldtab[0] is the global options. */
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fldtab_sz = 3;
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fld_cnt = 0;
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fldtab = emalloc(fldtab_sz * sizeof(*fldtab));
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memset(fldtab, 0, fldtab_sz * sizeof(*fldtab));
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#define SORT_OPTS "bcdD:fHik:lmno:rR:sSt:T:ux"
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/* Convert "+field" args to -f format */
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fixit(&argc, argv, SORT_OPTS);
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if (!(tmpdir = getenv("TMPDIR")))
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tmpdir = _PATH_TMP;
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while ((ch = getopt(argc, argv, SORT_OPTS)) != -1) {
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switch (ch) {
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case 'b':
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fldtab[0].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': /* Debug flags */
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for (i = 0; optarg[i]; i++)
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debug_flags |= 1 << (optarg[i] & 31);
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break;
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case 'd': case 'f': case 'i': case 'n': case 'l':
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fldtab[0].flags |= optval(ch, 0);
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break;
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case 'H':
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/* -H was ; use merge sort for blocks of large files' */
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/* That is now the default. */
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break;
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case 'k':
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fldtab = erealloc(fldtab, (fldtab_sz + 1) * sizeof(*fldtab));
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memset(&fldtab[fldtab_sz], 0, sizeof(fldtab[0]));
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fldtab_sz++;
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setfield(optarg, &fldtab[++fld_cnt], fldtab[0].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 'r':
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REVERSE = 1;
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break;
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case 's':
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/*
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* Nominally 'stable sort', keep lines with equal keys
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* in input file order. (Default for NetBSD)
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* (-s for GNU sort compatibility.)
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*/
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posix_sort = 0;
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break;
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case 'S':
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/*
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* Reverse of -s!
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* This needs to enforce a POSIX sort where records
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* with equal keys are then sorted by the raw data.
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* Currently not implemented!
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* (using libc radixsort() v sradixsort() doesn't
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* have the desired effect.)
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*/
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posix_sort = 1;
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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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REC_D = *optarg;
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if (REC_D == '\n')
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break;
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if (optarg[1] != '\0') {
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char *ep;
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int t = 0;
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if (optarg[0] == '\\')
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optarg++, t = 8;
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REC_D = (int)strtol(optarg, &ep, t);
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if (*ep != '\0' || REC_D < 0 ||
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REC_D >= (int)__arraycount(d_mask))
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errx(2, "invalid record delimiter %s",
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optarg);
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}
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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 (UNIQUE)
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/* Don't sort on raw record if keys match */
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posix_sort = 0;
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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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static char path_stdin[] = _PATH_STDIN;
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argv[i] = path_stdin;
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}
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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[1].icol.num == 0) {
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/* No sort key specified */
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if (fldtab[0].flags & (I|D|F|N|L)) {
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/* Modified - generate a key that covers the line */
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fldtab[0].flags &= ~(BI|BT);
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setfield("1", &fldtab[++fld_cnt], fldtab->flags);
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fldreset(fldtab);
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} else {
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/* Unmodified, just compare the line */
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SINGL_FLD = 1;
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fldtab[0].icol.num = 1;
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}
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} else {
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fldreset(fldtab);
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}
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settables();
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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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num_input_files = 1;
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} else {
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filelist.names = (const char * const *) &argv[optind];
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num_input_files = argc - optind;
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}
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if (cflag) {
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order(&filelist, fldtab);
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/* NOT REACHED */
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}
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if (!outpath) {
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toutpath[0] = '\0'; /* path not used in this case */
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outfile = outpath = toutpath;
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outfp = stdout;
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} else if (lstat(outpath, &st) == 0
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&& !S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
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/* output file exists and isn't character or block device */
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struct sigaction act;
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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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(void)atexit(cleanup);
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act.sa_handler = onsignal;
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(void) sigemptyset(&act.sa_mask);
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act.sa_flags = SA_RESTART | SA_RESETHAND;
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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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outfile = 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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} else {
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outfile = outpath;
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if ((outfp = fopen(outfile, "w")) == NULL)
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err(2, "output file %s", outfile);
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}
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if (mflag)
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fmerge(&filelist, num_input_files, outfp, fldtab);
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else
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fsort(&filelist, num_input_files, outfp, fldtab);
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if (outfile != outpath) {
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if (access(outfile, F_OK))
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err(2, "%s", outfile);
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/*
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* Copy file permissions bits of the original file.
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* st is initialized above, when we create the
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* temporary spool file.
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*/
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if (lchmod(outfile, st.st_mode & ALLPERMS) != 0) {
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err(2, "cannot chmod %s: output left in %s",
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outpath, outfile);
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}
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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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toutpath[0] = 0;
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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(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(void)
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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(const char *msg)
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{
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if (msg != NULL)
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(void)fprintf(stderr, "%s: %s\n", getprogname(), msg);
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(void)fprintf(stderr,
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"usage: %s [-bcdfHilmnrSsu] [-k field1[,field2]] [-o output]"
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" [-R char] [-T dir]", getprogname());
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(void)fprintf(stderr,
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" [-t char] [file ...]\n");
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exit(2);
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}
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RECHEADER *
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allocrec(RECHEADER *rec, size_t size)
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{
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return (erealloc(rec, size + sizeof(long) - 1));
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}
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