GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/paste/paste.c Lines: 0 108 0.0 %
Date: 2016-12-06 Branches: 0 107 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: paste.c,v 1.22 2015/12/09 19:39:10 mmcc Exp $	*/
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/*
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 * Copyright (c) 1989 The Regents of the University of California.
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 * All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Adam S. Moskowitz of Menlo Consulting.
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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/queue.h>
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#include <sys/types.h>
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#include <err.h>
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#include <errno.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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char *delim;
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int delimcnt;
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int	tr(char *);
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void	usage(void);
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void	parallel(char **);
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void	sequential(char **);
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int
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main(int argc, char *argv[])
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{
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	extern char *optarg;
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	extern int optind;
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	int ch, seq;
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	if (pledge("stdio rpath wpath cpath", NULL) == -1)
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		err(1, "pledge");
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	seq = 0;
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	while ((ch = getopt(argc, argv, "d:s")) != -1) {
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		switch (ch) {
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		case 'd':
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			delimcnt = tr(delim = optarg);
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			break;
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		case 's':
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			seq = 1;
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			break;
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		case '?':
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		default:
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			usage();
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	if (!delim) {
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		delimcnt = 1;
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		delim = "\t";
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	}
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	if (seq)
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		sequential(argv);
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	else
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		parallel(argv);
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	exit(0);
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}
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struct list {
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	SIMPLEQ_ENTRY(list) entries;
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	FILE *fp;
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	int cnt;
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	char *name;
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};
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void
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parallel(char **argv)
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{
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	SIMPLEQ_HEAD(, list) head = SIMPLEQ_HEAD_INITIALIZER(head);
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	struct list *lp;
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	int cnt;
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	char ch, *p;
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	int opencnt, output;
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	char *buf, *lbuf;
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	size_t len;
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	for (cnt = 0; (p = *argv); ++argv, ++cnt) {
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		if (!(lp = malloc(sizeof(struct list))))
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			err(1, "malloc");
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		if (p[0] == '-' && !p[1])
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			lp->fp = stdin;
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		else if (!(lp->fp = fopen(p, "r")))
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			err(1, "%s", p);
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		lp->cnt = cnt;
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		lp->name = p;
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		SIMPLEQ_INSERT_TAIL(&head, lp, entries);
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	}
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	for (opencnt = cnt; opencnt;) {
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		output = 0;
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		SIMPLEQ_FOREACH(lp, &head, entries) {
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			lbuf = NULL;
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			if (!lp->fp) {
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				if (output && lp->cnt &&
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				    (ch = delim[(lp->cnt - 1) % delimcnt]))
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					putchar(ch);
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				continue;
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			}
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			if (!(buf = fgetln(lp->fp, &len))) {
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				if (!--opencnt)
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					break;
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				if (lp->fp != stdin)
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					(void)fclose(lp->fp);
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				lp->fp = NULL;
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				if (output && lp->cnt &&
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				    (ch = delim[(lp->cnt - 1) % delimcnt]))
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					putchar(ch);
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				continue;
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			}
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			if (buf[len - 1] == '\n')
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				buf[len - 1] = '\0';
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			else {
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				if ((lbuf = malloc(len + 1)) == NULL)
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					err(1, "malloc");
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				memcpy(lbuf, buf, len);
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				lbuf[len] = '\0';
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				buf = lbuf;
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			}
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			/*
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			 * make sure that we don't print any delimiters
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			 * unless there's a non-empty file.
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			 */
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			if (!output) {
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				output = 1;
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				for (cnt = 0; cnt < lp->cnt; ++cnt)
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					if ((ch = delim[cnt % delimcnt]))
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						putchar(ch);
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			} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
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				putchar(ch);
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			(void)printf("%s", buf);
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			if (lbuf)
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				free(lbuf);
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		}
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		if (output)
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			putchar('\n');
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	}
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}
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void
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sequential(char **argv)
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{
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	FILE *fp;
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	int cnt;
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	char ch, *p, *dp;
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	char *buf, *lbuf;
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	size_t len;
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	for (; (p = *argv); ++argv) {
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		lbuf = NULL;
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		if (p[0] == '-' && !p[1])
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			fp = stdin;
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		else if (!(fp = fopen(p, "r"))) {
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			warn("%s", p);
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			continue;
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		}
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		if ((buf = fgetln(fp, &len))) {
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			for (cnt = 0, dp = delim;;) {
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				if (buf[len - 1] == '\n')
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					buf[len - 1] = '\0';
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				else {
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					if ((lbuf = malloc(len + 1)) == NULL)
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						err(1, "malloc");
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					memcpy(lbuf, buf, len);
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					lbuf[len] = '\0';
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					buf = lbuf;
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				}
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				(void)printf("%s", buf);
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				if (!(buf = fgetln(fp, &len)))
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					break;
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				if ((ch = *dp++))
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					putchar(ch);
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				if (++cnt == delimcnt) {
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					dp = delim;
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					cnt = 0;
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				}
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			}
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			putchar('\n');
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		}
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		if (fp != stdin)
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			(void)fclose(fp);
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		free(lbuf);
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	}
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}
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int
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tr(char *arg)
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{
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	int cnt;
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	char ch, *p;
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	for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt) {
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		if (ch == '\\') {
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			switch (ch = *p++) {
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			case 'n':
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				*arg = '\n';
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				break;
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			case 't':
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				*arg = '\t';
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				break;
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			case '0':
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				*arg = '\0';
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				break;
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			default:
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				*arg = ch;
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				break;
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			}
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		} else
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			*arg = ch;
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	}
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	if (!cnt)
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		errx(1, "no delimiters specified");
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	return (cnt);
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}
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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 [-s] [-d list] file ...\n",
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	    __progname);
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	exit(1);
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}