mirror of https://github.com/sudo-project/sudo.git
131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/*
|
|
* SPDX-License-Identifier: ISC
|
|
*
|
|
* Copyright (c) 2011-2015 Todd C. Miller <Todd.Miller@sudo.ws>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
|
|
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#ifdef HAVE_STDBOOL_H
|
|
# include <stdbool.h>
|
|
#else
|
|
# include <compat/stdbool.h>
|
|
#endif /* HAVE_STDBOOL_H */
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sudo_compat.h>
|
|
#include <sudo_debug.h>
|
|
#include <sudo_fatal.h>
|
|
#include <sudo_gettext.h>
|
|
#include <sudo_iolog.h>
|
|
#include <sudo_util.h>
|
|
|
|
/*
|
|
* Expand any escape sequences in inpath, returning the expanded path.
|
|
*/
|
|
bool
|
|
expand_iolog_path(const char *inpath, char *path, size_t pathlen,
|
|
const struct iolog_path_escape *escapes, void *closure)
|
|
{
|
|
char *dst, *pathend, tmpbuf[PATH_MAX];
|
|
const char *endbrace, *src;
|
|
bool strfit = false;
|
|
size_t len;
|
|
debug_decl(expand_iolog_path, SUDO_DEBUG_UTIL);
|
|
|
|
/* Collapse multiple leading slashes. */
|
|
while (inpath[0] == '/' && inpath[1] == '/')
|
|
inpath++;
|
|
|
|
pathend = path + pathlen;
|
|
for (src = inpath, dst = path; *src != '\0'; src++) {
|
|
if (src[0] == '%') {
|
|
if (src[1] == '{') {
|
|
endbrace = strchr(src + 2, '}');
|
|
if (endbrace != NULL) {
|
|
const struct iolog_path_escape *esc;
|
|
len = (size_t)(endbrace - src - 2);
|
|
for (esc = escapes; esc->name != NULL; esc++) {
|
|
if (strncmp(src + 2, esc->name, len) == 0 &&
|
|
esc->name[len] == '\0')
|
|
break;
|
|
}
|
|
if (esc->name != NULL) {
|
|
len = esc->copy_fn(dst, (size_t)(pathend - dst),
|
|
closure);
|
|
if (len >= (size_t)(pathend - dst))
|
|
goto bad;
|
|
dst += len;
|
|
src = endbrace;
|
|
continue;
|
|
}
|
|
}
|
|
} else if (src[1] == '%') {
|
|
/* Collapse %% -> % */
|
|
src++;
|
|
} else {
|
|
/* May need strftime() */
|
|
strfit = true;
|
|
}
|
|
}
|
|
/* Need at least 2 chars, including the NUL terminator. */
|
|
if (dst + 1 >= pathend)
|
|
goto bad;
|
|
*dst++ = *src;
|
|
}
|
|
|
|
/* Trim trailing slashes and NUL terminate. */
|
|
while (dst > path && dst[-1] == '/')
|
|
dst--;
|
|
*dst = '\0';
|
|
|
|
/* Expand strftime escapes as needed. */
|
|
if (strfit) {
|
|
struct tm tm;
|
|
time_t now;
|
|
|
|
time(&now);
|
|
if (localtime_r(&now, &tm) == NULL)
|
|
goto bad;
|
|
|
|
/* We only call strftime() on the current part of the buffer. */
|
|
tmpbuf[sizeof(tmpbuf) - 1] = '\0';
|
|
len = strftime(tmpbuf, sizeof(tmpbuf), path, &tm);
|
|
|
|
if (len == 0 || tmpbuf[sizeof(tmpbuf) - 1] != '\0')
|
|
goto bad; /* strftime() failed, buf too small? */
|
|
|
|
if (len >= (size_t)(pathend - path))
|
|
goto bad; /* expanded buffer too big to fit. */
|
|
memcpy(path, tmpbuf, len);
|
|
dst = path + len;
|
|
*dst = '\0';
|
|
}
|
|
|
|
debug_return_bool(true);
|
|
bad:
|
|
debug_return_bool(false);
|
|
}
|