1 /* 2 * Copyright (c) 1987, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1987, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)split.c 8.2 (Berkeley) 4/16/94 31 * $FreeBSD: src/usr.bin/split/split.c,v 1.6.2.2 2002/07/25 12:46:36 tjr Exp $ 32 */ 33 34 #include <sys/param.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <libutil.h> 41 #include <limits.h> 42 #include <stdbool.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <regex.h> 48 #include <sysexits.h> 49 50 #define DEFLINE 1000 /* Default num lines per file. */ 51 52 static int64_t bytecnt; /* Byte count to split on. */ 53 static long numlines; /* Line count to split on. */ 54 static int file_open; /* If a file open. */ 55 static int ifd = -1, ofd = -1; /* Input/output file descriptors. */ 56 static char *bfr; /* I/O buffer. */ 57 static char fname[MAXPATHLEN]; /* File name prefix. */ 58 static regex_t rgx; 59 static bool dflag; 60 static int pflag; 61 static long sufflen = 2; /* File name suffix length. */ 62 63 static void newfile(void); 64 static void split1(void); 65 static void split2(void); 66 static void usage(void); 67 68 int 69 main(int argc, char **argv) 70 { 71 int ch; 72 char *ep, *p; 73 int error; 74 75 while ((ch = getopt(argc, argv, "0123456789a:b:dl:p:")) != -1) 76 switch (ch) { 77 case '0': case '1': case '2': case '3': case '4': 78 case '5': case '6': case '7': case '8': case '9': 79 /* 80 * Undocumented kludge: split was originally designed 81 * to take a number after a dash. 82 */ 83 if (numlines == 0) { 84 p = argv[optind - 1]; 85 if (p[0] == '-' && p[1] == ch && !p[2]) 86 numlines = strtol(++p, &ep, 10); 87 else 88 numlines = 89 strtol(argv[optind] + 1, &ep, 10); 90 if (numlines <= 0 || *ep) 91 errx(EX_USAGE, 92 "%s: illegal line count", optarg); 93 } 94 break; 95 case 'a': /* Suffix length */ 96 if ((sufflen = strtol(optarg, &ep, 10)) <= 0 || *ep) 97 errx(EX_USAGE, 98 "%s: illegal suffix length", optarg); 99 break; 100 case 'b': /* Byte count. */ 101 error = dehumanize_number(optarg, &bytecnt); 102 if (error != 0) 103 errx(EX_USAGE, "%s: illegal byte count", 104 optarg); 105 break; 106 case 'd': /* Decimal suffix */ 107 dflag = true; 108 break; 109 case 'p' : /* pattern matching. */ 110 if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0) 111 errx(EX_USAGE, "%s: illegal regexp", optarg); 112 pflag = 1; 113 break; 114 case 'l': /* Line count. */ 115 if (numlines != 0) 116 usage(); 117 if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep) 118 errx(EX_USAGE, 119 "%s: illegal line count", optarg); 120 break; 121 default: 122 usage(); 123 } 124 argv += optind; 125 argc -= optind; 126 127 if (*argv != NULL) { 128 if (strcmp(*argv, "-") == 0) 129 ifd = STDIN_FILENO; 130 else if ((ifd = open(*argv, O_RDONLY, 0)) < 0) 131 err(EX_NOINPUT, "%s", *argv); 132 ++argv; 133 } 134 135 if (*argv != NULL) /* File name prefix. */ 136 if (strlcpy(fname, *argv++, sizeof(fname)) >= sizeof(fname)) 137 errx(EX_USAGE, "file name prefix is too long"); 138 if (*argv != NULL) 139 usage(); 140 141 if (strlen(fname) + (unsigned long)sufflen >= sizeof(fname)) 142 errx(EX_USAGE, "suffix is too long"); 143 if (pflag && (numlines != 0 || bytecnt != 0)) 144 usage(); 145 146 if (numlines == 0) 147 numlines = DEFLINE; 148 else if (bytecnt != 0) 149 usage(); 150 151 if (ifd == -1) /* Stdin by default. */ 152 ifd = 0; 153 154 if (bytecnt) { 155 split1(); 156 exit (0); 157 } 158 split2(); 159 if (pflag) 160 regfree(&rgx); 161 exit(0); 162 } 163 164 /* 165 * split1 -- 166 * Split the input by bytes. 167 */ 168 static void 169 split1(void) 170 { 171 off_t bcnt; 172 char *C; 173 ssize_t dist, len; 174 175 if((bfr = (char *)malloc(bytecnt)) == NULL) 176 err(EX_OSERR, "malloc"); 177 178 for (bcnt = 0;;) 179 switch ((len = read(ifd, bfr, bytecnt))) { 180 case 0: 181 free(bfr); 182 exit(0); 183 case -1: 184 free(bfr); 185 err(EX_IOERR, "read"); 186 /* NOTREACHED */ 187 default: 188 if (!file_open) 189 newfile(); 190 if (bcnt + len >= bytecnt) { 191 dist = bytecnt - bcnt; 192 if (write(ofd, bfr, dist) != dist) 193 err(EX_IOERR, "write"); 194 len -= dist; 195 for (C = bfr + dist; len >= bytecnt; 196 len -= bytecnt, C += bytecnt) { 197 newfile(); 198 if (write(ofd, 199 C, (int)bytecnt) != bytecnt) { 200 free(bfr); 201 err(EX_IOERR, "write"); 202 } 203 } 204 if (len != 0) { 205 newfile(); 206 if (write(ofd, C, len) != len) { 207 free(bfr); 208 err(EX_IOERR, "write"); 209 } 210 } else 211 file_open = 0; 212 bcnt = len; 213 } else { 214 bcnt += len; 215 if (write(ofd, bfr, len) != len) { 216 free(bfr); 217 err(EX_IOERR, "write"); 218 } 219 } 220 } 221 free(bfr); 222 } 223 224 /* 225 * split2 -- 226 * Split the input by lines. 227 */ 228 static void 229 split2(void) 230 { 231 int startofline = 1; 232 long lcnt = 0; 233 FILE *infp; 234 235 /* Stick a stream on top of input file descriptor */ 236 if ((infp = fdopen(ifd, "r")) == NULL) 237 err(EX_NOINPUT, "fdopen"); 238 239 if((bfr = (char *)malloc(MAXBSIZE)) == NULL) 240 err(EX_OSERR, "malloc"); 241 242 /* Process input one line at a time */ 243 while (fgets(bfr, MAXBSIZE, infp) != NULL) { 244 const int len = strlen(bfr); 245 246 /* Consider starting a new file only when at beginning of a line */ 247 if (startofline) { 248 /* Check if we need to start a new file */ 249 if (pflag) { 250 regmatch_t pmatch; 251 252 pmatch.rm_so = 0; 253 pmatch.rm_eo = len - 1; 254 if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0) 255 newfile(); 256 } else if (lcnt++ == numlines) { 257 newfile(); 258 lcnt = 1; 259 } 260 } 261 262 if (bfr[len - 1] != '\n') 263 startofline = 0; 264 else 265 startofline = 1; 266 267 /* Open output file if needed */ 268 if (!file_open) 269 newfile(); 270 271 /* Write out line */ 272 if (write(ofd, bfr, len) != len) { 273 free(bfr); 274 err(EX_IOERR, "write"); 275 } 276 } 277 278 free(bfr); 279 280 /* EOF or error? */ 281 if (ferror(infp)) 282 err(EX_IOERR, "read"); 283 else 284 exit(0); 285 } 286 287 /* 288 * newfile -- 289 * Open a new output file. 290 */ 291 static void 292 newfile(void) 293 { 294 long i, maxfiles, tfnum; 295 static long fnum; 296 static char *fpnt; 297 char beg, end; 298 int pattlen; 299 300 if (ofd == -1) { 301 if (fname[0] == '\0') { 302 fname[0] = 'x'; 303 fpnt = fname + 1; 304 } else { 305 fpnt = fname + strlen(fname); 306 } 307 ofd = fileno(stdout); 308 } 309 310 if (dflag) { 311 beg = '0'; 312 end = '9'; 313 } 314 else { 315 beg = 'a'; 316 end = 'z'; 317 } 318 pattlen = end - beg + 1; 319 320 /* maxfiles = pattlen^sufflen, but don't use libm. */ 321 for (maxfiles = 1, i = 0; i < sufflen; i++) 322 if (LONG_MAX / pattlen < maxfiles) 323 errx(EX_USAGE, "suffix is too long (max %ld)", i); 324 else 325 maxfiles *= pattlen; 326 327 if (fnum == maxfiles) 328 errx(EX_DATAERR, "too many files"); 329 330 /* Generate suffix of sufflen letters */ 331 tfnum = fnum; 332 i = sufflen - 1; 333 do { 334 fpnt[i] = tfnum % pattlen + beg; 335 tfnum /= pattlen; 336 } while (i-- > 0); 337 fpnt[sufflen] = '\0'; 338 339 ++fnum; 340 if (!freopen(fname, "w", stdout)) 341 err(EX_IOERR, "%s", fname); 342 file_open = 1; 343 } 344 345 static void 346 usage(void) 347 { 348 (void)fprintf(stderr, 349 "usage: split [-a sufflen] [-b byte_count] [-l line_count] [-p pattern]\n"); 350 (void)fprintf(stderr, 351 " [file [prefix]]\n"); 352 exit(EX_USAGE); 353 } 354