File: [local] / src / usr.bin / paste / paste.c (download)
Revision 1.18, Thu Aug 12 05:02:52 2010 UTC (13 years, 9 months ago) by tedu
Branch: MAIN
CVS Tags: OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9 Changes since 1.17: +14 -11 lines
make fgetln fixups look like the man page. correct a pair of brances and
some other style tweaks
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/* $OpenBSD: paste.c,v 1.18 2010/08/12 05:02:52 tedu Exp $ */
/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam S. Moskowitz of Menlo Consulting.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/queue.h>
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *delim;
int delimcnt;
int tr(char *);
void usage(void);
void parallel(char **);
void sequential(char **);
int
main(int argc, char *argv[])
{
extern char *optarg;
extern int optind;
int ch, seq;
seq = 0;
while ((ch = getopt(argc, argv, "d:s")) != -1) {
switch (ch) {
case 'd':
delimcnt = tr(delim = optarg);
break;
case 's':
seq = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!delim) {
delimcnt = 1;
delim = "\t";
}
if (seq)
sequential(argv);
else
parallel(argv);
exit(0);
}
struct list {
SIMPLEQ_ENTRY(list) entries;
FILE *fp;
int cnt;
char *name;
};
void
parallel(char **argv)
{
SIMPLEQ_HEAD(, list) head = SIMPLEQ_HEAD_INITIALIZER(head);
struct list *lp;
int cnt;
char ch, *p;
int opencnt, output;
char *buf, *lbuf;
size_t len;
for (cnt = 0; (p = *argv); ++argv, ++cnt) {
if (!(lp = malloc(sizeof(struct list))))
err(1, "malloc");
if (p[0] == '-' && !p[1])
lp->fp = stdin;
else if (!(lp->fp = fopen(p, "r")))
err(1, "%s", p);
lp->cnt = cnt;
lp->name = p;
SIMPLEQ_INSERT_TAIL(&head, lp, entries);
}
for (opencnt = cnt; opencnt;) {
output = 0;
SIMPLEQ_FOREACH(lp, &head, entries) {
lbuf = NULL;
if (!lp->fp) {
if (output && lp->cnt &&
(ch = delim[(lp->cnt - 1) % delimcnt]))
putchar(ch);
continue;
}
if (!(buf = fgetln(lp->fp, &len))) {
if (!--opencnt)
break;
lp->fp = NULL;
if (output && lp->cnt &&
(ch = delim[(lp->cnt - 1) % delimcnt]))
putchar(ch);
continue;
}
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
else {
if ((lbuf = malloc(len + 1)) == NULL)
err(1, "malloc");
memcpy(lbuf, buf, len);
lbuf[len] = '\0';
buf = lbuf;
}
/*
* make sure that we don't print any delimiters
* unless there's a non-empty file.
*/
if (!output) {
output = 1;
for (cnt = 0; cnt < lp->cnt; ++cnt)
if ((ch = delim[cnt % delimcnt]))
putchar(ch);
} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
putchar(ch);
(void)printf("%s", buf);
if (lbuf)
free(lbuf);
}
if (output)
putchar('\n');
}
}
void
sequential(char **argv)
{
FILE *fp;
int cnt;
char ch, *p, *dp;
char *buf, *lbuf;
size_t len;
for (; (p = *argv); ++argv) {
lbuf = NULL;
if (p[0] == '-' && !p[1])
fp = stdin;
else if (!(fp = fopen(p, "r"))) {
warn("%s", p);
continue;
}
if ((buf = fgetln(fp, &len))) {
for (cnt = 0, dp = delim;;) {
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
else {
if ((lbuf = malloc(len + 1)) == NULL)
err(1, "malloc");
memcpy(lbuf, buf, len);
lbuf[len] = '\0';
buf = lbuf;
}
(void)printf("%s", buf);
if (!(buf = fgetln(fp, &len)))
break;
if ((ch = *dp++))
putchar(ch);
if (++cnt == delimcnt) {
dp = delim;
cnt = 0;
}
}
putchar('\n');
}
if (fp != stdin)
(void)fclose(fp);
if (lbuf)
free(lbuf);
}
}
int
tr(char *arg)
{
int cnt;
char ch, *p;
for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt) {
if (ch == '\\') {
switch (ch = *p++) {
case 'n':
*arg = '\n';
break;
case 't':
*arg = '\t';
break;
case '0':
*arg = '\0';
break;
default:
*arg = ch;
break;
}
} else
*arg = ch;
}
if (!cnt)
errx(1, "no delimiters specified");
return (cnt);
}
void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-s] [-d list] file ...\n",
__progname);
exit(1);
}