130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 2007, 2013-2014
|
|
* Todd C. Miller <Todd.Miller@courtesan.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <sys/types.h>
|
|
#ifdef STDC_HEADERS
|
|
# include <stdlib.h>
|
|
# include <stddef.h>
|
|
#else
|
|
# ifdef HAVE_STDLIB_H
|
|
# include <stdlib.h>
|
|
# endif
|
|
#endif /* STDC_HEADERS */
|
|
#ifdef HAVE_STRING_H
|
|
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
|
|
# include <memory.h>
|
|
# endif
|
|
# include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
|
|
# include <malloc.h>
|
|
#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
|
|
#include <ctype.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif /* HAVE_UNISTD_H */
|
|
#include <fcntl.h>
|
|
#ifdef HAVE_STDBOOL_H
|
|
# include <stdbool.h>
|
|
#else
|
|
# include "compat/stdbool.h"
|
|
#endif
|
|
|
|
#include "missing.h"
|
|
#include "sudo_util.h"
|
|
#include "sudo_debug.h"
|
|
|
|
/*
|
|
* Read a line of input, honoring line continuation chars.
|
|
* Remove comments and strips off leading and trailing spaces.
|
|
* Returns the line length and updates the buf and bufsize pointers.
|
|
* XXX - just use a struct w/ state, including getline buffer?
|
|
* could also make comment char and line continuation configurable
|
|
*/
|
|
ssize_t
|
|
sudo_parseln(char **bufp, size_t *bufsizep, unsigned int *lineno, FILE *fp)
|
|
{
|
|
size_t linesize = 0, total = 0;
|
|
ssize_t len;
|
|
char *cp, *line = NULL;
|
|
bool continued;
|
|
debug_decl(sudo_parseln, SUDO_DEBUG_UTIL)
|
|
|
|
do {
|
|
continued = false;
|
|
len = getline(&line, &linesize, fp);
|
|
if (len == -1)
|
|
break;
|
|
if (lineno != NULL)
|
|
(*lineno)++;
|
|
|
|
/* Remove trailing newline(s) if present. */
|
|
while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r'))
|
|
line[--len] = '\0';
|
|
|
|
/* Remove comments or check for line continuation (but not both) */
|
|
if ((cp = strchr(line, '#')) != NULL) {
|
|
*cp = '\0';
|
|
len = (size_t)(cp - line);
|
|
} else if (len > 0 && line[len - 1] == '\\' && (len == 1 || line[len - 2] != '\\')) {
|
|
line[--len] = '\0';
|
|
continued = true;
|
|
}
|
|
|
|
/* Trim leading and trailing whitespace */
|
|
if (!continued) {
|
|
while (len > 0 && isblank((unsigned char)line[len - 1]))
|
|
line[--len] = '\0';
|
|
}
|
|
for (cp = line; isblank((unsigned char)*cp); cp++)
|
|
len--;
|
|
|
|
if (*bufp == NULL || total + len >= *bufsizep) {
|
|
void *tmp;
|
|
size_t size = total + len + 1;
|
|
|
|
if (size < 64) {
|
|
size = 64;
|
|
} else if (size <= 0x80000000) {
|
|
/* Round up to next highest power of two. */
|
|
size--;
|
|
size |= size >> 1;
|
|
size |= size >> 2;
|
|
size |= size >> 4;
|
|
size |= size >> 8;
|
|
size |= size >> 16;
|
|
size++;
|
|
}
|
|
if ((tmp = realloc(*bufp, size)) == NULL)
|
|
break;
|
|
*bufp = tmp;
|
|
*bufsizep = size;
|
|
}
|
|
memcpy(*bufp + total, cp, len + 1);
|
|
total += len;
|
|
} while (continued);
|
|
free(line);
|
|
if (len == -1 && total == 0)
|
|
debug_return_size_t((size_t)-1);
|
|
debug_return_size_t(total);
|
|
}
|