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1.6 ! millert 1: /* $OpenBSD: split.c,v 1.5 1999/12/04 21:16:05 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: split.c,v 1.5 1995/08/31 22:22:05 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1987, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1987, 1993, 1994\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)split.c 8.3 (Berkeley) 4/25/94";
1.4 millert 46: #else
1.6 ! millert 47: static char rcsid[] = "$OpenBSD: split.c,v 1.5 1999/12/04 21:16:05 deraadt Exp $";
1.1 deraadt 48: #endif
49: #endif /* not lint */
50:
51: #include <sys/param.h>
1.4 millert 52: #include <sys/types.h>
1.1 deraadt 53:
54: #include <ctype.h>
55: #include <err.h>
56: #include <fcntl.h>
57: #include <stdio.h>
58: #include <stdlib.h>
59: #include <string.h>
60: #include <unistd.h>
1.4 millert 61: #include <regex.h>
62: #include <sysexits.h>
1.1 deraadt 63:
64: #define DEFLINE 1000 /* Default num lines per file. */
65:
66: long bytecnt; /* Byte count to split on. */
67: long numlines; /* Line count to split on. */
68: int file_open; /* If a file open. */
69: int ifd = -1, ofd = -1; /* Input/output file descriptors. */
70: char bfr[MAXBSIZE]; /* I/O buffer. */
71: char fname[MAXPATHLEN]; /* File name prefix. */
1.4 millert 72: regex_t rgx;
73: int pflag;
1.1 deraadt 74:
1.6 ! millert 75: void newfile(void);
! 76: void split1(void);
! 77: void split2(void);
! 78: void usage(void);
1.1 deraadt 79:
80: int
81: main(argc, argv)
82: int argc;
83: char *argv[];
84: {
85: int ch;
86: char *ep, *p;
87:
1.4 millert 88: while ((ch = getopt(argc, argv, "-0123456789b:l:p:")) != -1)
1.1 deraadt 89: switch (ch) {
90: case '0': case '1': case '2': case '3': case '4':
91: case '5': case '6': case '7': case '8': case '9':
92: /*
93: * Undocumented kludge: split was originally designed
94: * to take a number after a dash.
95: */
96: if (numlines == 0) {
97: p = argv[optind - 1];
98: if (p[0] == '-' && p[1] == ch && !p[2])
99: numlines = strtol(++p, &ep, 10);
100: else
101: numlines =
102: strtol(argv[optind] + 1, &ep, 10);
103: if (numlines <= 0 || *ep)
1.4 millert 104: errx(EX_USAGE,
105: "%s: illegal line count", optarg);
1.1 deraadt 106: }
107: break;
108: case '-': /* Undocumented: historic stdin flag. */
109: if (ifd != -1)
110: usage();
111: ifd = 0;
112: break;
113: case 'b': /* Byte count. */
114: if ((bytecnt = strtol(optarg, &ep, 10)) <= 0 ||
1.4 millert 115: (*ep != '\0' && *ep != 'k' && *ep != 'm'))
116: errx(EX_USAGE,
117: "%s: illegal byte count", optarg);
1.1 deraadt 118: if (*ep == 'k')
119: bytecnt *= 1024;
120: else if (*ep == 'm')
121: bytecnt *= 1048576;
122: break;
1.4 millert 123: case 'p' : /* pattern matching. */
124: if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0)
125: errx(EX_USAGE, "%s: illegal regexp", optarg);
126: pflag = 1;
127: break;
1.1 deraadt 128: case 'l': /* Line count. */
129: if (numlines != 0)
130: usage();
131: if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep)
1.4 millert 132: errx(EX_USAGE,
133: "%s: illegal line count", optarg);
1.1 deraadt 134: break;
135: default:
136: usage();
137: }
138: argv += optind;
139: argc -= optind;
140:
141: if (*argv != NULL)
142: if (ifd == -1) { /* Input file. */
143: if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
1.4 millert 144: err(EX_NOINPUT, "%s", *argv);
1.1 deraadt 145: ++argv;
146: }
147: if (*argv != NULL) /* File name prefix. */
1.5 deraadt 148: (void)strlcpy(fname, *argv++, sizeof(fname));
1.1 deraadt 149: if (*argv != NULL)
150: usage();
151:
1.4 millert 152: if (pflag && (numlines != 0 || bytecnt != 0))
153: usage();
154:
1.1 deraadt 155: if (numlines == 0)
156: numlines = DEFLINE;
1.4 millert 157: else if (bytecnt != 0)
1.1 deraadt 158: usage();
159:
160: if (ifd == -1) /* Stdin by default. */
161: ifd = 0;
162:
163: if (bytecnt) {
164: split1();
165: exit (0);
166: }
167: split2();
1.4 millert 168: if (pflag)
169: regfree(&rgx);
1.1 deraadt 170: exit(0);
171: }
172:
173: /*
174: * split1 --
175: * Split the input by bytes.
176: */
177: void
178: split1()
179: {
180: long bcnt;
181: int dist, len;
182: char *C;
183:
184: for (bcnt = 0;;)
1.4 millert 185: switch ((len = read(ifd, bfr, MAXBSIZE))) {
1.1 deraadt 186: case 0:
187: exit(0);
188: case -1:
1.4 millert 189: err(EX_IOERR, "read");
1.1 deraadt 190: /* NOTREACHED */
191: default:
1.4 millert 192: if (!file_open)
1.1 deraadt 193: newfile();
194: if (bcnt + len >= bytecnt) {
195: dist = bytecnt - bcnt;
196: if (write(ofd, bfr, dist) != dist)
1.4 millert 197: err(EX_IOERR, "write");
1.1 deraadt 198: len -= dist;
199: for (C = bfr + dist; len >= bytecnt;
200: len -= bytecnt, C += bytecnt) {
201: newfile();
202: if (write(ofd,
203: C, (int)bytecnt) != bytecnt)
1.4 millert 204: err(EX_IOERR, "write");
1.1 deraadt 205: }
1.4 millert 206: if (len != 0) {
1.1 deraadt 207: newfile();
208: if (write(ofd, C, len) != len)
1.4 millert 209: err(EX_IOERR, "write");
1.1 deraadt 210: } else
211: file_open = 0;
212: bcnt = len;
213: } else {
214: bcnt += len;
215: if (write(ofd, bfr, len) != len)
1.4 millert 216: err(EX_IOERR, "write");
1.1 deraadt 217: }
218: }
219: }
220:
221: /*
222: * split2 --
223: * Split the input by lines.
224: */
225: void
226: split2()
227: {
1.4 millert 228: long lcnt = 0;
229: FILE *infp;
1.1 deraadt 230:
1.4 millert 231: /* Stick a stream on top of input file descriptor */
232: if ((infp = fdopen(ifd, "r")) == NULL)
233: err(EX_NOINPUT, "fdopen");
234:
235: /* Process input one line at a time */
236: while (fgets(bfr, sizeof(bfr), infp) != NULL) {
237: const int len = strlen(bfr);
238:
239: /* If line is too long to deal with, just write it out */
240: if (bfr[len - 1] != '\n')
241: goto writeit;
242:
243: /* Check if we need to start a new file */
244: if (pflag) {
245: regmatch_t pmatch;
246:
247: pmatch.rm_so = 0;
248: pmatch.rm_eo = len - 1;
249: if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0)
1.1 deraadt 250: newfile();
1.4 millert 251: } else if (lcnt++ == numlines) {
252: newfile();
253: lcnt = 1;
1.1 deraadt 254: }
1.4 millert 255:
256: writeit:
257: /* Open output file if needed */
258: if (!file_open)
259: newfile();
260:
261: /* Write out line */
262: if (write(ofd, bfr, len) != len)
263: err(EX_IOERR, "write");
264: }
265:
266: /* EOF or error? */
267: if (ferror(infp))
268: err(EX_IOERR, "read");
269: else
270: exit(0);
1.1 deraadt 271: }
272:
273: /*
274: * newfile --
275: * Open a new output file.
276: */
277: void
278: newfile()
279: {
280: static long fnum;
281: static int defname;
282: static char *fpnt;
283:
284: if (ofd == -1) {
285: if (fname[0] == '\0') {
286: fname[0] = 'x';
287: fpnt = fname + 1;
288: defname = 1;
289: } else {
290: fpnt = fname + strlen(fname);
291: defname = 0;
292: }
293: ofd = fileno(stdout);
294: }
295: /*
296: * Hack to increase max files; original code wandered through
297: * magic characters. Maximum files is 3 * 26 * 26 == 2028
298: */
299: #define MAXFILES 676
300: if (fnum == MAXFILES) {
301: if (!defname || fname[0] == 'z')
1.4 millert 302: errx(EX_DATAERR, "too many files");
1.1 deraadt 303: ++fname[0];
304: fnum = 0;
305: }
306: fpnt[0] = fnum / 26 + 'a';
307: fpnt[1] = fnum % 26 + 'a';
308: ++fnum;
309: if (!freopen(fname, "w", stdout))
1.4 millert 310: err(EX_IOERR, "%s", fname);
311: file_open = 1;
1.1 deraadt 312: }
313:
314: void
315: usage()
316: {
1.4 millert 317: extern char *__progname;
318:
1.1 deraadt 319: (void)fprintf(stderr,
1.4 millert 320: "usage: %s [-b byte_count] [-l line_count] [-p pattern] [file [prefix]]\n",
321: __progname);
322: exit(EX_USAGE);
1.1 deraadt 323: }