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1.10 ! jmc 1: /* $OpenBSD: split.c,v 1.9 2003/06/10 22:20:51 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.
1.8 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1987, 1993, 1994\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)split.c 8.3 (Berkeley) 4/25/94";
1.4 millert 42: #else
1.10 ! jmc 43: static char rcsid[] = "$OpenBSD: split.c,v 1.9 2003/06/10 22:20:51 deraadt Exp $";
1.1 deraadt 44: #endif
45: #endif /* not lint */
46:
47: #include <sys/param.h>
1.4 millert 48: #include <sys/types.h>
1.1 deraadt 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>
1.4 millert 57: #include <regex.h>
58: #include <sysexits.h>
1.1 deraadt 59:
60: #define DEFLINE 1000 /* Default num lines per file. */
61:
62: long 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. */
1.4 millert 68: regex_t rgx;
69: int pflag;
1.1 deraadt 70:
1.6 millert 71: void newfile(void);
72: void split1(void);
73: void split2(void);
74: void usage(void);
1.1 deraadt 75:
76: int
1.9 deraadt 77: main(int argc, char *argv[])
1.1 deraadt 78: {
79: int ch;
80: char *ep, *p;
81:
1.7 millert 82: while ((ch = getopt(argc, argv, "0123456789b:l:p:-")) != -1)
1.1 deraadt 83: switch (ch) {
84: case '0': case '1': case '2': case '3': case '4':
85: case '5': case '6': case '7': case '8': case '9':
86: /*
87: * Undocumented kludge: split was originally designed
88: * to take a number after a dash.
89: */
90: if (numlines == 0) {
91: p = argv[optind - 1];
92: if (p[0] == '-' && p[1] == ch && !p[2])
93: numlines = strtol(++p, &ep, 10);
94: else
95: numlines =
96: strtol(argv[optind] + 1, &ep, 10);
97: if (numlines <= 0 || *ep)
1.4 millert 98: errx(EX_USAGE,
99: "%s: illegal line count", optarg);
1.1 deraadt 100: }
101: break;
102: case '-': /* Undocumented: historic stdin flag. */
103: if (ifd != -1)
104: usage();
105: ifd = 0;
106: break;
107: case 'b': /* Byte count. */
108: if ((bytecnt = strtol(optarg, &ep, 10)) <= 0 ||
1.4 millert 109: (*ep != '\0' && *ep != 'k' && *ep != 'm'))
110: errx(EX_USAGE,
111: "%s: illegal byte count", optarg);
1.1 deraadt 112: if (*ep == 'k')
113: bytecnt *= 1024;
114: else if (*ep == 'm')
115: bytecnt *= 1048576;
116: break;
1.4 millert 117: case 'p' : /* pattern matching. */
118: if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0)
119: errx(EX_USAGE, "%s: illegal regexp", optarg);
120: pflag = 1;
121: break;
1.1 deraadt 122: case 'l': /* Line count. */
123: if (numlines != 0)
124: usage();
125: if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep)
1.4 millert 126: errx(EX_USAGE,
127: "%s: illegal line count", optarg);
1.1 deraadt 128: break;
129: default:
130: usage();
131: }
132: argv += optind;
133: argc -= optind;
134:
135: if (*argv != NULL)
136: if (ifd == -1) { /* Input file. */
137: if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
1.4 millert 138: err(EX_NOINPUT, "%s", *argv);
1.1 deraadt 139: ++argv;
140: }
141: if (*argv != NULL) /* File name prefix. */
1.5 deraadt 142: (void)strlcpy(fname, *argv++, sizeof(fname));
1.1 deraadt 143: if (*argv != NULL)
144: usage();
145:
1.4 millert 146: if (pflag && (numlines != 0 || bytecnt != 0))
147: usage();
148:
1.1 deraadt 149: if (numlines == 0)
150: numlines = DEFLINE;
1.4 millert 151: else if (bytecnt != 0)
1.1 deraadt 152: usage();
153:
154: if (ifd == -1) /* Stdin by default. */
155: ifd = 0;
156:
157: if (bytecnt) {
158: split1();
159: exit (0);
160: }
161: split2();
1.4 millert 162: if (pflag)
163: regfree(&rgx);
1.1 deraadt 164: exit(0);
165: }
166:
167: /*
168: * split1 --
169: * Split the input by bytes.
170: */
171: void
1.9 deraadt 172: split1(void)
1.1 deraadt 173: {
174: long bcnt;
175: int dist, len;
176: char *C;
177:
178: for (bcnt = 0;;)
1.4 millert 179: switch ((len = read(ifd, bfr, MAXBSIZE))) {
1.1 deraadt 180: case 0:
181: exit(0);
182: case -1:
1.4 millert 183: err(EX_IOERR, "read");
1.1 deraadt 184: /* NOTREACHED */
185: default:
1.4 millert 186: if (!file_open)
1.1 deraadt 187: newfile();
188: if (bcnt + len >= bytecnt) {
189: dist = bytecnt - bcnt;
190: if (write(ofd, bfr, dist) != dist)
1.4 millert 191: err(EX_IOERR, "write");
1.1 deraadt 192: len -= dist;
193: for (C = bfr + dist; len >= bytecnt;
194: len -= bytecnt, C += bytecnt) {
195: newfile();
196: if (write(ofd,
197: C, (int)bytecnt) != bytecnt)
1.4 millert 198: err(EX_IOERR, "write");
1.1 deraadt 199: }
1.4 millert 200: if (len != 0) {
1.1 deraadt 201: newfile();
202: if (write(ofd, C, len) != len)
1.4 millert 203: err(EX_IOERR, "write");
1.1 deraadt 204: } else
205: file_open = 0;
206: bcnt = len;
207: } else {
208: bcnt += len;
209: if (write(ofd, bfr, len) != len)
1.4 millert 210: err(EX_IOERR, "write");
1.1 deraadt 211: }
212: }
213: }
214:
215: /*
216: * split2 --
217: * Split the input by lines.
218: */
219: void
1.9 deraadt 220: split2(void)
1.1 deraadt 221: {
1.4 millert 222: long lcnt = 0;
223: FILE *infp;
1.1 deraadt 224:
1.4 millert 225: /* Stick a stream on top of input file descriptor */
226: if ((infp = fdopen(ifd, "r")) == NULL)
227: err(EX_NOINPUT, "fdopen");
228:
229: /* Process input one line at a time */
230: while (fgets(bfr, sizeof(bfr), infp) != NULL) {
231: const int len = strlen(bfr);
232:
233: /* If line is too long to deal with, just write it out */
234: if (bfr[len - 1] != '\n')
235: goto writeit;
236:
237: /* Check if we need to start a new file */
238: if (pflag) {
239: regmatch_t pmatch;
240:
241: pmatch.rm_so = 0;
242: pmatch.rm_eo = len - 1;
243: if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0)
1.1 deraadt 244: newfile();
1.4 millert 245: } else if (lcnt++ == numlines) {
246: newfile();
247: lcnt = 1;
1.1 deraadt 248: }
1.4 millert 249:
250: writeit:
251: /* Open output file if needed */
252: if (!file_open)
253: newfile();
254:
255: /* Write out line */
256: if (write(ofd, bfr, len) != len)
257: err(EX_IOERR, "write");
258: }
259:
260: /* EOF or error? */
261: if (ferror(infp))
262: err(EX_IOERR, "read");
263: else
264: exit(0);
1.1 deraadt 265: }
266:
267: /*
268: * newfile --
269: * Open a new output file.
270: */
271: void
1.9 deraadt 272: newfile(void)
1.1 deraadt 273: {
274: static long fnum;
275: static int defname;
276: static char *fpnt;
277:
278: if (ofd == -1) {
279: if (fname[0] == '\0') {
280: fname[0] = 'x';
281: fpnt = fname + 1;
282: defname = 1;
283: } else {
284: fpnt = fname + strlen(fname);
285: defname = 0;
286: }
287: ofd = fileno(stdout);
288: }
289: /*
290: * Hack to increase max files; original code wandered through
291: * magic characters. Maximum files is 3 * 26 * 26 == 2028
292: */
293: #define MAXFILES 676
294: if (fnum == MAXFILES) {
295: if (!defname || fname[0] == 'z')
1.4 millert 296: errx(EX_DATAERR, "too many files");
1.1 deraadt 297: ++fname[0];
298: fnum = 0;
299: }
300: fpnt[0] = fnum / 26 + 'a';
301: fpnt[1] = fnum % 26 + 'a';
302: ++fnum;
303: if (!freopen(fname, "w", stdout))
1.4 millert 304: err(EX_IOERR, "%s", fname);
305: file_open = 1;
1.1 deraadt 306: }
307:
308: void
1.9 deraadt 309: usage(void)
1.1 deraadt 310: {
1.4 millert 311: extern char *__progname;
312:
1.1 deraadt 313: (void)fprintf(stderr,
1.10 ! jmc 314: "usage: %s [-b byte_count[k|m]] [-l line_count] [-p pattern] [file [name]]\n",
1.4 millert 315: __progname);
316: exit(EX_USAGE);
1.1 deraadt 317: }