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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1987, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif 42 43 #ifndef lint 44 static const char sccsid[] = "@(#)split.c 8.2 (Berkeley) 4/16/94"; 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/types.h> 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <fcntl.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 #include <regex.h> 58 #include <sysexits.h> 59 60 #define DEFLINE 1000 /* Default num lines per file. */ 61 62 int bytecnt; /* Byte count to split on. */ 63 long numlines; /* Line count to split on. */ 64 int file_open; /* If a file open. */ 65 int ifd = -1, ofd = -1; /* Input/output file descriptors. */ 66 char bfr[MAXBSIZE]; /* I/O buffer. */ 67 char fname[MAXPATHLEN]; /* File name prefix. */ 68 regex_t rgx; 69 int pflag; 70 71 void newfile __P((void)); 72 void split1 __P((void)); 73 void split2 __P((void)); 74 static void usage __P((void)); 75 76 int 77 main(argc, argv) 78 int argc; 79 char *argv[]; 80 { 81 int ch; 82 char *ep, *p; 83 84 while ((ch = getopt(argc, argv, "-0123456789b:l:p:")) != -1) 85 switch (ch) { 86 case '0': case '1': case '2': case '3': case '4': 87 case '5': case '6': case '7': case '8': case '9': 88 /* 89 * Undocumented kludge: split was originally designed 90 * to take a number after a dash. 91 */ 92 if (numlines == 0) { 93 p = argv[optind - 1]; 94 if (p[0] == '-' && p[1] == ch && !p[2]) 95 numlines = strtol(++p, &ep, 10); 96 else 97 numlines = 98 strtol(argv[optind] + 1, &ep, 10); 99 if (numlines <= 0 || *ep) 100 errx(EX_USAGE, 101 "%s: illegal line count", optarg); 102 } 103 break; 104 case '-': /* Undocumented: historic stdin flag. */ 105 if (ifd != -1) 106 usage(); 107 ifd = 0; 108 break; 109 case 'b': /* Byte count. */ 110 if ((bytecnt = strtoq(optarg, &ep, 10)) <= 0 || 111 (*ep != '\0' && *ep != 'k' && *ep != 'm')) 112 errx(EX_USAGE, 113 "%s: illegal byte count", optarg); 114 if (*ep == 'k') 115 bytecnt *= 1024; 116 else if (*ep == 'm') 117 bytecnt *= 1048576; 118 break; 119 case 'p' : /* pattern matching. */ 120 if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0) 121 errx(EX_USAGE, "%s: illegal regexp", optarg); 122 pflag = 1; 123 break; 124 case 'l': /* Line count. */ 125 if (numlines != 0) 126 usage(); 127 if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep) 128 errx(EX_USAGE, 129 "%s: illegal line count", optarg); 130 break; 131 default: 132 usage(); 133 } 134 argv += optind; 135 argc -= optind; 136 137 if (*argv != NULL) 138 if (ifd == -1) { /* Input file. */ 139 if ((ifd = open(*argv, O_RDONLY, 0)) < 0) 140 err(EX_NOINPUT, "%s", *argv); 141 ++argv; 142 } 143 if (*argv != NULL) /* File name prefix. */ 144 (void)strcpy(fname, *argv++); 145 if (*argv != NULL) 146 usage(); 147 148 if (pflag && (numlines != 0 || bytecnt != 0)) 149 usage(); 150 151 if (numlines == 0) 152 numlines = DEFLINE; 153 else if (bytecnt != 0) 154 usage(); 155 156 if (ifd == -1) /* Stdin by default. */ 157 ifd = 0; 158 159 if (bytecnt) { 160 split1(); 161 exit (0); 162 } 163 split2(); 164 if (pflag) 165 regfree(&rgx); 166 exit(0); 167 } 168 169 /* 170 * split1 -- 171 * Split the input by bytes. 172 */ 173 void 174 split1() 175 { 176 size_t bcnt; 177 char *C; 178 int dist, len; 179 180 for (bcnt = 0;;) 181 switch ((len = read(ifd, bfr, MAXBSIZE))) { 182 case 0: 183 exit(0); 184 case -1: 185 err(EX_IOERR, "read"); 186 /* NOTREACHED */ 187 default: 188 if (!file_open) 189 newfile(); 190 if (bcnt + len >= (u_int)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, bytecnt) != bytecnt) 200 err(EX_IOERR, "write"); 201 } 202 if (len != 0) { 203 newfile(); 204 if (write(ofd, C, len) != len) 205 err(EX_IOERR, "write"); 206 } else 207 file_open = 0; 208 bcnt = len; 209 } else { 210 bcnt += len; 211 if (write(ofd, bfr, len) != len) 212 err(EX_IOERR, "write"); 213 } 214 } 215 } 216 217 /* 218 * split2 -- 219 * Split the input by lines. 220 */ 221 void 222 split2() 223 { 224 long lcnt = 0; 225 FILE *infp; 226 227 /* Stick a stream on top of input file descriptor */ 228 if ((infp = fdopen(ifd, "r")) == NULL) 229 err(EX_NOINPUT, "fdopen"); 230 231 /* Process input one line at a time */ 232 while (fgets(bfr, sizeof(bfr), infp) != NULL) { 233 const int len = strlen(bfr); 234 235 /* If line is too long to deal with, just write it out */ 236 if (bfr[len - 1] != '\n') 237 goto writeit; 238 239 /* Check if we need to start a new file */ 240 if (pflag) { 241 regmatch_t pmatch; 242 243 pmatch.rm_so = 0; 244 pmatch.rm_eo = len - 1; 245 if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0) 246 newfile(); 247 } else if (lcnt++ == numlines) { 248 newfile(); 249 lcnt = 1; 250 } 251 252 writeit: 253 /* Open output file if needed */ 254 if (!file_open) 255 newfile(); 256 257 /* Write out line */ 258 if (write(ofd, bfr, len) != len) 259 err(EX_IOERR, "write"); 260 } 261 262 /* EOF or error? */ 263 if (ferror(infp)) 264 err(EX_IOERR, "read"); 265 else 266 exit(0); 267 } 268 269 /* 270 * newfile -- 271 * Open a new output file. 272 */ 273 void 274 newfile() 275 { 276 static long fnum; 277 static int defname; 278 static char *fpnt; 279 280 if (ofd == -1) { 281 if (fname[0] == '\0') { 282 fname[0] = 'x'; 283 fpnt = fname + 1; 284 defname = 1; 285 } else { 286 fpnt = fname + strlen(fname); 287 defname = 0; 288 } 289 ofd = fileno(stdout); 290 } 291 /* 292 * Hack to increase max files; original code wandered through 293 * magic characters. Maximum files is 3 * 26 * 26 == 2028 294 */ 295 #define MAXFILES 676 296 if (fnum == MAXFILES) { 297 if (!defname || fname[0] == 'z') 298 errx(EX_DATAERR, "too many files"); 299 ++fname[0]; 300 fnum = 0; 301 } 302 fpnt[0] = fnum / 26 + 'a'; 303 fpnt[1] = fnum % 26 + 'a'; 304 ++fnum; 305 if (!freopen(fname, "w", stdout)) 306 err(EX_IOERR, "%s", fname); 307 file_open = 1; 308 } 309 310 static void 311 usage() 312 { 313 (void)fprintf(stderr, 314 "usage: split [-b byte_count] [-l line_count] [-p pattern] [file [prefix]]\n"); 315 exit(EX_USAGE); 316 } 317