GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/split/split.c Lines: 0 139 0.0 %
Date: 2016-12-06 Branches: 0 130 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: split.c,v 1.21 2015/12/31 16:13:01 millert Exp $	*/
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/*	$NetBSD: split.c,v 1.5 1995/08/31 22:22:05 jtc Exp $	*/
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/*
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 * Copyright (c) 1987, 1993, 1994
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/param.h>	/* MAXBSIZE */
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <regex.h>
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#define DEFLINE	1000			/* Default num lines per file. */
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ssize_t	 bytecnt;			/* Byte count to split on. */
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long	 numlines;			/* Line count to split on. */
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int	 file_open;			/* If a file open. */
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int	 ifd = -1, ofd = -1;		/* Input/output file descriptors. */
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char	 bfr[MAXBSIZE];			/* I/O buffer. */
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char	 fname[PATH_MAX];		/* File name prefix. */
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regex_t	 rgx;
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int	 pflag;
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int	 sufflen = 2;			/* File name suffix length. */
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void newfile(void);
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void split1(void);
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void split2(void);
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__dead void usage(void);
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int
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main(int argc, char *argv[])
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{
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	int ch, scale;
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	char *ep, *p;
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	const char *errstr;
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	if (pledge("stdio rpath wpath cpath", NULL) == -1)
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		err(1, "pledge");
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	while ((ch = getopt(argc, argv, "0123456789a:b:l:p:-")) != -1)
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		switch (ch) {
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		case '0': case '1': case '2': case '3': case '4':
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		case '5': case '6': case '7': case '8': case '9':
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			/*
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			 * Undocumented kludge: split was originally designed
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			 * to take a number after a dash.
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			 */
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			if (numlines == 0) {
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				p = argv[optind - 1];
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				if (p[0] == '-' && p[1] == ch && !p[2])
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					numlines = strtol(++p, &ep, 10);
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				else
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					numlines =
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					    strtol(argv[optind] + 1, &ep, 10);
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				if (numlines <= 0 || *ep)
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					errx(1, "%s: illegal line count",
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					    optarg);
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			}
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			break;
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		case '-':		/* Undocumented: historic stdin flag. */
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			if (ifd != -1)
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				usage();
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			ifd = 0;
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			break;
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		case 'a':		/* suffix length. */
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			sufflen = strtonum(optarg, 1, NAME_MAX, &errstr);
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			if (errstr)
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				errx(1, "%s: %s", optarg, errstr);
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			break;
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		case 'b':		/* Byte count. */
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			if ((bytecnt = strtol(optarg, &ep, 10)) <= 0 ||
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			    (*ep != '\0' && *ep != 'k' && *ep != 'm'))
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				errx(1, "%s: illegal byte count", optarg);
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			if (*ep == 'k')
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				scale = 1024;
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			else if (*ep == 'm')
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				scale = 1048576;
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			else
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				scale = 1;
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			if (bytecnt > SSIZE_MAX / scale)
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				errx(1, "%s: byte count too large", optarg);
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			bytecnt *= scale;
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			break;
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		case 'p' :      /* pattern matching. */
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			if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0)
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				errx(1, "%s: illegal regexp", optarg);
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			pflag = 1;
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			break;
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		case 'l':		/* Line count. */
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			if (numlines != 0)
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				usage();
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			if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep)
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				errx(1, "%s: illegal line count", optarg);
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			break;
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		default:
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			usage();
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		}
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	argv += optind;
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	argc -= optind;
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	if (*argv != NULL)
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		if (ifd == -1) {		/* Input file. */
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			if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
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				err(1, "%s", *argv);
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			++argv;
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		}
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	if (*argv != NULL)			/* File name prefix. */
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		(void)strlcpy(fname, *argv++, sizeof(fname));
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	if (*argv != NULL)
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		usage();
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	if (strlen(fname) + sufflen >= sizeof(fname))
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		errx(1, "suffix is too long");
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	if (pflag && (numlines != 0 || bytecnt != 0))
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		usage();
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	if (numlines == 0)
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		numlines = DEFLINE;
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	else if (bytecnt != 0)
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		usage();
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	if (ifd == -1)				/* Stdin by default. */
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		ifd = 0;
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	if (bytecnt) {
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		split1();
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		exit (0);
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	}
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	split2();
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	if (pflag)
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		regfree(&rgx);
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	exit(0);
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}
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/*
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 * split1 --
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 *	Split the input by bytes.
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 */
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void
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split1(void)
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{
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	ssize_t bcnt, dist, len;
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	char *C;
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	for (bcnt = 0;;)
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		switch ((len = read(ifd, bfr, MAXBSIZE))) {
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		case 0:
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			exit(0);
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		case -1:
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			err(1, "read");
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			/* NOTREACHED */
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		default:
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			if (!file_open)
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				newfile();
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			if (bcnt + len >= bytecnt) {
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				dist = bytecnt - bcnt;
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				if (write(ofd, bfr, dist) != dist)
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					err(1, "write");
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				len -= dist;
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				for (C = bfr + dist; len >= bytecnt;
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				    len -= bytecnt, C += bytecnt) {
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					newfile();
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					if (write(ofd, C, bytecnt) != bytecnt)
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						err(1, "write");
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				}
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				if (len != 0) {
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					newfile();
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					if (write(ofd, C, len) != len)
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						err(1, "write");
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				} else
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					file_open = 0;
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				bcnt = len;
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			} else {
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				bcnt += len;
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				if (write(ofd, bfr, len) != len)
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					err(1, "write");
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			}
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		}
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}
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/*
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 * split2 --
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 *	Split the input by lines.
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 */
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void
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split2(void)
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{
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	long lcnt = 0;
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	FILE *infp;
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	/* Stick a stream on top of input file descriptor */
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	if ((infp = fdopen(ifd, "r")) == NULL)
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		err(1, "fdopen");
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	/* Process input one line at a time */
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	while (fgets(bfr, sizeof(bfr), infp) != NULL) {
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		const int len = strlen(bfr);
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		if (len == 0)
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			continue;
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		/* If line is too long to deal with, just write it out */
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		if (bfr[len - 1] != '\n')
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			goto writeit;
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		/* Check if we need to start a new file */
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		if (pflag) {
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			regmatch_t pmatch;
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			pmatch.rm_so = 0;
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			pmatch.rm_eo = len - 1;
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			if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0)
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				newfile();
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		} else if (lcnt++ == numlines) {
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			newfile();
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			lcnt = 1;
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		}
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writeit:
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		/* Open output file if needed */
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		if (!file_open)
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			newfile();
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		/* Write out line */
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		if (write(ofd, bfr, len) != len)
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			err(1, "write");
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	}
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	/* EOF or error? */
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	if (ferror(infp))
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		err(1, "read");
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	else
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		exit(0);
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}
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/*
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 * newfile --
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 *	Open a new output file.
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 */
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void
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newfile(void)
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{
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	static char *suffix, *sufftail;
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	char *sptr;
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	if (ofd == -1) {
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		ofd = fileno(stdout);
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		if (*fname == '\0') {
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			*fname = 'x';	/* no name specified, use 'x' */
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			memset(fname + 1, 'a', sufflen);
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			suffix = fname;
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			sufflen++;	/* treat 'x' as part of suffix */
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		} else {
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			suffix = fname + strlen(fname);
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			memset(suffix, 'a', sufflen);
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		}
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		suffix[sufflen] = '\0';
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		sufftail = suffix + sufflen - 1;
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	} else {
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		for (sptr = sufftail; sptr >= suffix; sptr--) {
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			if (*sptr != 'z') {
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				(*sptr)++;
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				break;
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			} else
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				*sptr = 'a';
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		}
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		if (sptr < suffix)
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			errx(1, "too many files");
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	}
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	if (!freopen(fname, "w", stdout))
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		err(1, "%s", fname);
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	file_open = 1;
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}
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__dead void
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usage(void)
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{
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	extern char *__progname;
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	(void)fprintf(stderr, "usage: %s [-a suffix_length]\n"
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	    "             [-b byte_count[k|m] | -l line_count | -p pattern] "
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	    "[file [name]]\n", __progname);
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	exit(1);
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}