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/*-
* Copyright (c) 2015 Baptiste Daroussin <bapt@FreeBSD.org>
* All rights reserved.
*
* 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
* in this position and unchanged.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/sbuf.h>
#include <ctype.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <xlocale.h>
static bool
parse_id(FILE *fp, struct sbuf *buf, locale_t l)
{
int c;
bool isid = false;
bool subversion = false;
sbuf_putc(buf, '$');
while ((c = fgetc(fp)) != EOF) {
sbuf_putc(buf, c);
if (!isid) {
if (c == '$') {
sbuf_clear(buf);
sbuf_putc(buf, '$');
continue;
}
if (c == ':') {
c = fgetc(fp);
/* accept :: for subversion compatibility */
if (c == ':') {
subversion = true;
sbuf_putc(buf, c);
c = fgetc(fp);
}
if (c == ' ') {
sbuf_putc(buf, c);
isid = true;
continue;
}
return (false);
}
if (!isalpha_l(c, l))
return (false);
} else {
if (c == '\n')
return (false);
if (c == '$') {
sbuf_finish(buf);
/* should end with a space */
c = sbuf_data(buf)[sbuf_len(buf) - 2];
if (!subversion) {
if (c != ' ')
return (0);
} else if (subversion) {
if (c != ' ' && c != '#')
return (0);
}
printf(" %s\n", sbuf_data(buf));
return (true);
}
}
}
return (false);
}
static int
scan(FILE *fp, const char *name, bool quiet)
{
int c;
bool hasid = false;
struct sbuf *id = sbuf_new_auto();
locale_t l;
l = newlocale(LC_ALL_MASK, "C", NULL);
if (name != NULL)
printf("%s:\n", name);
while ((c = fgetc(fp)) != EOF) {
if (c == '$') {
sbuf_clear(id);
if (parse_id(fp, id, l))
hasid = true;
}
}
sbuf_delete(id);
freelocale(l);
if (!hasid) {
if (!quiet)
fprintf(stderr, "%s warning: no id keywords in %s\n",
getprogname(), name ? name : "standard input");
return (EXIT_FAILURE);
}
return (EXIT_SUCCESS);
}
int
main(int argc, char **argv)
{
bool quiet = false;
int ch, i;
int ret = EXIT_SUCCESS;
FILE *fp;
while ((ch = getopt(argc, argv, "qV")) != -1) {
switch (ch) {
case 'q':
quiet = true;
break;
case 'V':
/* Do nothing, compat with GNU rcs's ident */
return (EXIT_SUCCESS);
default:
errx(EXIT_FAILURE, "usage: %s [-q] [-V] [file...]",
getprogname());
}
}
argc -= optind;
argv += optind;
if (argc == 0)
return (scan(stdin, NULL, quiet));
for (i = 0; i < argc; i++) {
fp = fopen(argv[i], "r");
if (fp == NULL) {
warn("%s", argv[i]);
ret = EXIT_FAILURE;
continue;
}
if (scan(fp, argv[i], quiet) != EXIT_SUCCESS)
ret = EXIT_FAILURE;
fclose(fp);
}
return (ret);
}
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