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/* $OpenBSD: ident.c,v 1.30 2014/10/02 06:23:15 otto Exp $ */
/*
* Copyright (c) 2005 Xavier Santolaria <xsa@openbsd.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.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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 <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "rcsprog.h"
#define KEYDELIM '$' /* keywords delimiter */
#define VALDELIM ':' /* values delimiter */
static int found = 0;
static int flags = 0;
static void ident_file(const char *, FILE *);
static void ident_line(FILE *);
int
ident_main(int argc, char **argv)
{
int i, ch, status;
FILE *fp;
status = 0;
while ((ch = rcs_getopt(argc, argv, "qV")) != -1) {
switch(ch) {
case 'q':
flags |= QUIET;
break;
case 'V':
printf("%s\n", rcs_version);
exit(0);
default:
(usage)();
}
}
argc -= rcs_optind;
argv += rcs_optind;
if (argc == 0)
ident_file(NULL, stdin);
else {
for (i = 0; i < argc; i++) {
if ((fp = fopen(argv[i], "r")) == NULL) {
warn("%s", argv[i]);
status = 1;
continue;
}
ident_file(argv[i], fp);
(void)fclose(fp);
if (i != argc - 1)
printf("\n");
}
}
return (status);
}
static void
ident_file(const char *filename, FILE *fp)
{
int c;
if (filename != NULL)
printf("%s:\n", filename);
else
filename = "standard input";
for (c = 0; c != EOF; c = getc(fp)) {
if (feof(fp) || ferror(fp))
break;
if (c == KEYDELIM)
ident_line(fp);
}
if (found == 0 && !(flags & QUIET))
fprintf(stderr, "ident warning: no id keywords in %s\n",
filename);
found = 0;
}
static void
ident_line(FILE *fp)
{
int c;
BUF *bp;
size_t len;
bp = buf_alloc(512);
while ((c = getc(fp)) != VALDELIM) {
if (c == EOF)
goto out;
if (isalpha(c))
buf_putc(bp, c);
else
goto out;
}
buf_putc(bp, VALDELIM);
while ((c = getc(fp)) != KEYDELIM) {
if (c == EOF)
goto out;
if (c == '\n')
goto out;
buf_putc(bp, c);
}
len = buf_len(bp);
if (buf_getc(bp, len - 1) != ' ')
goto out;
/* append trailing KEYDELIM */
buf_putc(bp, c);
/* Append newline for printing. */
buf_putc(bp, '\n');
printf(" %c", KEYDELIM);
fflush(stdout);
buf_write_fd(bp, STDOUT_FILENO);
found++;
out:
if (bp != NULL)
buf_free(bp);
}
__dead void
ident_usage(void)
{
fprintf(stderr, "usage: ident [-qV] [file ...]\n");
exit(1);
}
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