sort.c revision 1.49
1 /* $NetBSD: sort.c,v 1.49 2009/08/15 09:48:46 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 2000-2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ben Harris and Jaromir Dolecek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Peter McIlroy. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 /* Sort sorts a file using an optional user-defined key. 65 * Sort uses radix sort for internal sorting, and allows 66 * a choice of merge sort and radix sort for external sorting. 67 */ 68 69 #include "sort.h" 70 #include "fsort.h" 71 #include "pathnames.h" 72 73 #ifndef lint 74 __COPYRIGHT("@(#) Copyright (c) 1993\ 75 The Regents of the University of California. All rights reserved."); 76 #endif /* not lint */ 77 78 #ifndef lint 79 __RCSID("$NetBSD: sort.c,v 1.49 2009/08/15 09:48:46 dsl Exp $"); 80 __SCCSID("@(#)sort.c 8.1 (Berkeley) 6/6/93"); 81 #endif /* not lint */ 82 83 #include <sys/types.h> 84 #include <sys/time.h> 85 #include <sys/resource.h> 86 87 #include <paths.h> 88 #include <signal.h> 89 #include <stdlib.h> 90 #include <string.h> 91 #include <unistd.h> 92 #include <locale.h> 93 94 int REC_D = '\n'; 95 u_char d_mask[NBINS]; /* flags for rec_d, field_d, <blank> */ 96 97 /* 98 * weight tables. Gweights is one of ascii, Rascii.. 99 * modified to weight rec_d = 0 (or 255) 100 */ 101 u_char ascii[NBINS], Rascii[NBINS], RFtable[NBINS], Ftable[NBINS]; 102 int SINGL_FLD = 0, SEP_FLAG = 0, UNIQUE = 0; 103 104 /* 105 * Default to stable sort. 106 */ 107 int stable_sort = 1; 108 109 static char toutpath[MAXPATHLEN]; 110 111 const char *tmpdir; /* where temporary files should be put */ 112 113 static void cleanup(void); 114 static void onsignal(int); 115 static void usage(const char *); 116 117 int main(int argc, char **argv); 118 119 int 120 main(int argc, char *argv[]) 121 { 122 get_func_t get; 123 int ch, i, stdinflag = 0, tmp = 0; 124 char cflag = 0, mflag = 0; 125 char *outfile, *outpath = 0; 126 struct field *fldtab, *p; 127 size_t fldtab_sz = 3, fidx = 0; 128 struct filelist filelist; 129 FILE *outfp = NULL; 130 struct rlimit rl; 131 struct stat st; 132 133 setlocale(LC_ALL, ""); 134 135 /* bump RLIMIT_NOFILE to maximum our hard limit allows */ 136 if (getrlimit(RLIMIT_NOFILE, &rl) < 0) 137 err(2, "getrlimit"); 138 rl.rlim_cur = rl.rlim_max; 139 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) 140 err(2, "setrlimit"); 141 142 d_mask[REC_D = '\n'] = REC_D_F; 143 d_mask['\t'] = d_mask[' '] = BLANK | FLD_D; 144 145 fldtab = malloc(fldtab_sz * sizeof(*fldtab)); 146 memset(fldtab, 0, fldtab_sz * sizeof(*fldtab)); 147 148 fixit(&argc, argv); 149 150 if (!(tmpdir = getenv("TMPDIR"))) 151 tmpdir = _PATH_TMP; 152 153 while ((ch = getopt(argc, argv, "bcdfik:mHno:rR:sSt:T:ux")) != -1) { 154 switch (ch) { 155 case 'b': 156 fldtab->flags |= BI | BT; 157 break; 158 case 'c': 159 cflag = 1; 160 break; 161 case 'd': case 'f': case 'i': case 'n': case 'r': 162 tmp |= optval(ch, 0); 163 if ((tmp & R) && (tmp & F)) 164 fldtab->weights = RFtable; 165 else if (tmp & F) 166 fldtab->weights = Ftable; 167 else if (tmp & R) 168 fldtab->weights = Rascii; 169 fldtab->flags |= tmp; 170 break; 171 case 'H': 172 PANIC = 0; 173 break; 174 case 'k': 175 p = realloc(fldtab, (fldtab_sz + 1) * sizeof(*fldtab)); 176 if (!p) 177 err(1, "realloc"); 178 fldtab = p; 179 memset(&fldtab[fldtab_sz], 0, 180 sizeof(fldtab[fldtab_sz])); 181 fldtab_sz++; 182 183 setfield(optarg, &fldtab[++fidx], fldtab->flags); 184 break; 185 case 'm': 186 mflag = 1; 187 break; 188 case 'o': 189 outpath = optarg; 190 break; 191 case 's': 192 /* for GNU sort compatibility (this is our default) */ 193 stable_sort = 1; 194 break; 195 case 'S': 196 stable_sort = 0; 197 break; 198 case 't': 199 if (SEP_FLAG) 200 usage("multiple field delimiters"); 201 SEP_FLAG = 1; 202 d_mask[' '] &= ~FLD_D; 203 d_mask['\t'] &= ~FLD_D; 204 d_mask[(u_char)*optarg] |= FLD_D; 205 if (d_mask[(u_char)*optarg] & REC_D_F) 206 errx(2, "record/field delimiter clash"); 207 break; 208 case 'R': 209 if (REC_D != '\n') 210 usage("multiple record delimiters"); 211 if ('\n' == (REC_D = *optarg)) 212 break; 213 if (optarg[1] != '\0') { 214 char *ep; 215 int t = 0; 216 if (optarg[0] == '\\') 217 optarg++, t = 8; 218 REC_D = (int)strtol(optarg, &ep, t); 219 if (*ep != '\0' || REC_D < 0 || 220 REC_D >= (int)__arraycount(d_mask)) 221 errx(2, "invalid record delimiter %s", 222 optarg); 223 } 224 d_mask['\n'] = d_mask[' ']; 225 d_mask[REC_D] = REC_D_F; 226 break; 227 case 'T': 228 /* -T tmpdir */ 229 tmpdir = optarg; 230 break; 231 case 'u': 232 UNIQUE = 1; 233 break; 234 case '?': 235 default: 236 usage(NULL); 237 } 238 } 239 if (cflag && argc > optind+1) 240 errx(2, "too many input files for -c option"); 241 if (argc - 2 > optind && !strcmp(argv[argc-2], "-o")) { 242 outpath = argv[argc-1]; 243 argc -= 2; 244 } 245 if (mflag && argc - optind > (MAXFCT - (16+1))*16) 246 errx(2, "too many input files for -m option"); 247 for (i = optind; i < argc; i++) { 248 /* allow one occurrence of /dev/stdin */ 249 if (!strcmp(argv[i], "-") || !strcmp(argv[i], _PATH_STDIN)) { 250 if (stdinflag) 251 warnx("ignoring extra \"%s\" in file list", 252 argv[i]); 253 else 254 stdinflag = 1; 255 256 /* change to /dev/stdin if '-' */ 257 if (argv[i][0] == '-') 258 argv[i] = __UNCONST(_PATH_STDIN); 259 260 } else if ((ch = access(argv[i], R_OK))) 261 err(2, "%s", argv[i]); 262 } 263 if (!(fldtab->flags & (I|D|N) || fldtab[1].icol.num)) { 264 SINGL_FLD = 1; 265 fldtab[0].icol.num = 1; 266 } else { 267 if (!fldtab[1].icol.num) { 268 fldtab[0].flags &= ~(BI|BT); 269 setfield("1", &fldtab[++fidx], fldtab->flags); 270 } 271 fldreset(fldtab); 272 fldtab[0].flags &= ~F; 273 } 274 settables(fldtab[0].flags); 275 num_init(); 276 fldtab->weights = gweights; 277 if (optind == argc) { 278 static const char * const names[] = { _PATH_STDIN, NULL }; 279 280 filelist.names = names; 281 optind--; 282 } else 283 filelist.names = (const char * const *) &argv[optind]; 284 285 if (SINGL_FLD) 286 get = makeline; 287 else 288 get = makekey; 289 290 if (cflag) { 291 order(&filelist, get, fldtab); 292 /* NOT REACHED */ 293 } 294 if (!outpath) { 295 toutpath[0] = '\0'; /* path not used in this case */ 296 outfile = outpath = toutpath; 297 outfp = stdout; 298 } else if (lstat(outpath, &st) == 0 299 && !S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { 300 /* output file exists and isn't character or block device */ 301 struct sigaction act; 302 static const int sigtable[] = {SIGHUP, SIGINT, SIGPIPE, 303 SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, 0}; 304 int outfd; 305 errno = 0; 306 if (access(outpath, W_OK)) 307 err(2, "%s", outpath); 308 (void)snprintf(toutpath, sizeof(toutpath), "%sXXXXXX", 309 outpath); 310 if ((outfd = mkstemp(toutpath)) == -1) 311 err(2, "Cannot create temporary file `%s'", toutpath); 312 if ((outfp = fdopen(outfd, "w")) == NULL) 313 err(2, "Cannot open temporary file `%s'", toutpath); 314 outfile = toutpath; 315 (void)atexit(cleanup); 316 act.sa_handler = onsignal; 317 (void) sigemptyset(&act.sa_mask); 318 act.sa_flags = SA_RESTART | SA_RESETHAND; 319 for (i = 0; sigtable[i]; ++i) /* always unlink toutpath */ 320 sigaction(sigtable[i], &act, 0); 321 } else { 322 outfile = outpath; 323 324 if ((outfp = fopen(outfile, "w")) == NULL) 325 err(2, "output file %s", outfile); 326 } 327 328 if (mflag) { 329 fmerge(-1, 0, &filelist, argc-optind, get, outfp, putline, 330 fldtab); 331 } else 332 fsort(-1, 0, 0, &filelist, argc-optind, outfp, fldtab); 333 334 if (outfile != outpath) { 335 if (access(outfile, F_OK)) 336 err(2, "%s", outfile); 337 338 /* 339 * Copy file permissions bits of the original file. 340 * st is initialized above, when we create the 341 * temporary spool file. 342 */ 343 if (lchmod(outfile, st.st_mode & ALLPERMS) != 0) { 344 err(2, "cannot chmod %s: output left in %s", 345 outpath, outfile); 346 } 347 348 (void)unlink(outpath); 349 if (link(outfile, outpath)) 350 err(2, "cannot link %s: output left in %s", 351 outpath, outfile); 352 (void)unlink(outfile); 353 } 354 exit(0); 355 } 356 357 static void 358 onsignal(int sig) 359 { 360 cleanup(); 361 } 362 363 static void 364 cleanup(void) 365 { 366 if (toutpath[0]) 367 (void)unlink(toutpath); 368 } 369 370 static void 371 usage(const char *msg) 372 { 373 if (msg != NULL) 374 (void)fprintf(stderr, "%s: %s\n", getprogname(), msg); 375 (void)fprintf(stderr, 376 "usage: %s [-bcdfHimnrSsu] [-k field1[,field2]] [-o output]" 377 " [-R char] [-T dir]", getprogname()); 378 (void)fprintf(stderr, 379 " [-t char] [file ...]\n"); 380 exit(2); 381 } 382
Indexes created Tue Sep 23 13:09:54 GMT 2025