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d42862594a
getc/putc loop. Suggested by: dd
256 lines
5.5 KiB
C
256 lines
5.5 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)paste.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 parallel(char **);
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int sequential(char **);
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int tr(char *);
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static void usage(void);
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char tab[] = "\t";
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int
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main(int argc, char *argv[])
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{
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int ch, rval, seq;
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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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argc -= optind;
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argv += optind;
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if (*argv == NULL)
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usage();
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if (!delim) {
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delimcnt = 1;
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delim = tab;
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}
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if (seq)
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rval = sequential(argv);
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else
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rval = parallel(argv);
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exit(rval);
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}
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typedef struct _list {
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struct _list *next;
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FILE *fp;
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int cnt;
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char *name;
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} LIST;
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int
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parallel(char **argv)
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{
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LIST *lp;
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int cnt;
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char ch, *buf, *p;
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LIST *head, *tmp;
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int opencnt, output;
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size_t len;
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for (cnt = 0, head = NULL; (p = *argv); ++argv, ++cnt) {
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if ((lp = malloc(sizeof(LIST))) == NULL)
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err(1, NULL);
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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->next = NULL;
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lp->cnt = cnt;
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lp->name = p;
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if (!head)
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head = tmp = lp;
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else {
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tmp->next = lp;
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tmp = lp;
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}
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}
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for (opencnt = cnt; opencnt;) {
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for (output = 0, lp = head; lp; lp = lp->next) {
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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)) == NULL) {
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if (!--opencnt)
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break;
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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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/*
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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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if (buf[len - 1] == '\n')
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len--;
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fwrite(buf, 1, len, stdout);
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}
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if (output)
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putchar('\n');
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}
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return (0);
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}
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int
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sequential(char **argv)
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{
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FILE *fp;
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int cnt, failed, needdelim;
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char *buf, *p;
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size_t len;
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failed = 0;
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for (; (p = *argv); ++argv) {
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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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failed = 1;
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continue;
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}
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cnt = needdelim = 0;
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while ((buf = fgetln(fp, &len)) != NULL) {
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if (needdelim) {
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needdelim = 0;
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if (delim[cnt] != '\0')
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putchar(delim[cnt]);
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if (++cnt == delimcnt)
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cnt = 0;
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}
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if (buf[len - 1] == '\n')
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len--;
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fwrite(buf, 1, len, stdout);
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needdelim = 1;
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}
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if (needdelim)
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putchar('\n');
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if (fp != stdin)
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(void)fclose(fp);
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}
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return (failed != 0);
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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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} else
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*arg = ch;
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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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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
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exit(1);
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}
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