FreeBSD-5.3/usr.bin/paste/paste.c
/*
* Copyright (c) 1989, 1993
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)paste.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/paste/paste.c,v 1.14 2004/06/25 01:48:43 tjr Exp $");
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
wchar_t *delim;
int delimcnt;
int parallel(char **);
int sequential(char **);
int tr(wchar_t *);
static void usage(void);
wchar_t tab[] = L"\t";
int
main(int argc, char *argv[])
{
int ch, rval, seq;
wchar_t *warg;
const char *arg;
size_t len;
setlocale(LC_CTYPE, "");
seq = 0;
while ((ch = getopt(argc, argv, "d:s")) != -1)
switch(ch) {
case 'd':
arg = optarg;
len = mbsrtowcs(NULL, &arg, 0, NULL);
if (len == (size_t)-1)
err(1, "delimiters");
warg = malloc((len + 1) * sizeof(*warg));
if (warg == NULL)
err(1, NULL);
arg = optarg;
len = mbsrtowcs(warg, &arg, len + 1, NULL);
if (len == (size_t)-1)
err(1, "delimiters");
delimcnt = tr(delim = warg);
break;
case 's':
seq = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (*argv == NULL)
usage();
if (!delim) {
delimcnt = 1;
delim = tab;
}
if (seq)
rval = sequential(argv);
else
rval = parallel(argv);
exit(rval);
}
typedef struct _list {
struct _list *next;
FILE *fp;
int cnt;
char *name;
} LIST;
int
parallel(char **argv)
{
LIST *lp;
int cnt;
wint_t ich;
wchar_t ch;
char *p;
LIST *head, *tmp;
int opencnt, output;
for (cnt = 0, head = NULL; (p = *argv); ++argv, ++cnt) {
if ((lp = malloc(sizeof(LIST))) == NULL)
err(1, NULL);
if (p[0] == '-' && !p[1])
lp->fp = stdin;
else if (!(lp->fp = fopen(p, "r")))
err(1, "%s", p);
lp->next = NULL;
lp->cnt = cnt;
lp->name = p;
if (!head)
head = tmp = lp;
else {
tmp->next = lp;
tmp = lp;
}
}
for (opencnt = cnt; opencnt;) {
for (output = 0, lp = head; lp; lp = lp->next) {
if (!lp->fp) {
if (output && lp->cnt &&
(ch = delim[(lp->cnt - 1) % delimcnt]))
putwchar(ch);
continue;
}
if ((ich = getwc(lp->fp)) == WEOF) {
if (!--opencnt)
break;
lp->fp = NULL;
if (output && lp->cnt &&
(ch = delim[(lp->cnt - 1) % delimcnt]))
putwchar(ch);
continue;
}
/*
* 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]))
putwchar(ch);
} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
putwchar(ch);
if (ich == '\n')
continue;
do {
putwchar(ich);
} while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
}
if (output)
putwchar('\n');
}
return (0);
}
int
sequential(char **argv)
{
FILE *fp;
int cnt, failed, needdelim;
wint_t ch;
char *p;
failed = 0;
for (; (p = *argv); ++argv) {
if (p[0] == '-' && !p[1])
fp = stdin;
else if (!(fp = fopen(p, "r"))) {
warn("%s", p);
failed = 1;
continue;
}
cnt = needdelim = 0;
while ((ch = getwc(fp)) != WEOF) {
if (needdelim) {
needdelim = 0;
if (delim[cnt] != '\0')
putwchar(delim[cnt]);
if (++cnt == delimcnt)
cnt = 0;
}
if (ch != '\n')
putwchar(ch);
else
needdelim = 1;
}
if (needdelim)
putwchar('\n');
if (fp != stdin)
(void)fclose(fp);
}
return (failed != 0);
}
int
tr(wchar_t *arg)
{
int cnt;
wchar_t 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);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
exit(1);
}