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/*
* fontconfig/src/fccompat.c
*
* Copyright © 2012 Red Hat, Inc.
*
* Author(s):
* Akira TAGOH
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the author(s) not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "fcint.h"
#include <errno.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef O_CLOEXEC
#define FC_O_CLOEXEC O_CLOEXEC
#else
#define FC_O_CLOEXEC 0
#endif
#ifdef O_LARGEFILE
#define FC_O_LARGEFILE O_LARGEFILE
#else
#define FC_O_LARGEFILE 0
#endif
#ifdef O_BINARY
#define FC_O_BINARY O_BINARY
#else
#define FC_O_BINARY 0
#endif
#ifdef O_TEMPORARY
#define FC_O_TEMPORARY O_TEMPORARY
#else
#define FC_O_TEMPORARY 0
#endif
#ifdef O_NOINHERIT
#define FC_O_NOINHERIT O_NOINHERIT
#else
#define FC_O_NOINHERIT 0
#endif
#if !defined (HAVE_MKOSTEMP) && !defined(HAVE_MKSTEMP) && !defined(HAVE__MKTEMP_S)
static int
mkstemp (char *template)
{
static const char s[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
int fd, i;
size_t l;
if (template == NULL)
{
errno = EINVAL;
return -1;
}
l = strlen (template);
if (l < 6 || strcmp (&template[l - 6], "XXXXXX") != 0)
{
errno = EINVAL;
return -1;
}
do
{
errno = 0;
for (i = l - 6; i < l; i++)
{
int r = FcRandom ();
template[i] = s[r % 62];
}
fd = FcOpen (template, FC_O_BINARY | O_CREAT | O_EXCL | FC_O_TEMPORARY | FC_O_NOINHERIT | O_RDWR, 0600);
} while (fd < 0 && errno == EEXIST);
if (fd >= 0)
errno = 0;
return fd;
}
#define HAVE_MKSTEMP 1
#endif
int
FcOpen(const char *pathname, int flags, ...)
{
int fd = -1;
if (flags & O_CREAT)
{
va_list ap;
mode_t mode;
va_start(ap, flags);
mode = (mode_t) va_arg(ap, int);
va_end(ap);
fd = open(pathname, flags | FC_O_CLOEXEC | FC_O_LARGEFILE, mode);
}
else
{
fd = open(pathname, flags | FC_O_CLOEXEC | FC_O_LARGEFILE);
}
return fd;
}
int
FcMakeTempfile (char *template)
{
int fd = -1;
#if HAVE_MKOSTEMP
fd = mkostemp (template, FC_O_CLOEXEC);
#elif HAVE_MKSTEMP
fd = mkstemp (template);
# ifdef F_DUPFD_CLOEXEC
if (fd != -1)
{
int newfd = fcntl(fd, F_DUPFD_CLOEXEC, STDIN_FILENO);
close(fd);
fd = newfd;
}
# elif defined(FD_CLOEXEC)
if (fd != -1)
{
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
}
# endif
#elif HAVE__MKTEMP_S
if (_mktemp_s(template, strlen(template) + 1) != 0)
return -1;
fd = FcOpen(template, O_RDWR | O_EXCL | O_CREAT, 0600);
#else
/* warn at the runtime for just debugging purpose why something may
* goes wrong. mingw may not have one, but it shouldn't be reached since
* this function isn't used so far.
*/
fprintf(stderr, "Fontconfig warning: No secure functions to create a temporary file\n");
#endif
return fd;
}
int32_t
FcRandom(void)
{
int32_t result;
#if HAVE_RANDOM_R
static struct random_data fcrandbuf;
static char statebuf[256];
static FcBool initialized = FcFalse;
if (initialized != FcTrue)
{
initstate_r(time(NULL), statebuf, 256, &fcrandbuf);
initialized = FcTrue;
}
random_r(&fcrandbuf, &result);
#elif HAVE_RANDOM
static char statebuf[256];
char *state;
static FcBool initialized = FcFalse;
if (initialized != FcTrue)
{
state = initstate(time(NULL), statebuf, 256);
initialized = FcTrue;
}
else
state = setstate(statebuf);
result = random();
setstate(state);
#elif HAVE_LRAND48
result = lrand48();
#elif HAVE_RAND_R
static unsigned int seed = time(NULL);
result = rand_r(&seed);
#elif HAVE_RAND
static FcBool initialized = FcFalse;
if (initialized != FcTrue)
{
srand(time(NULL));
initialized = FcTrue;
}
result = rand();
#else
# error no random number generator function available.
#endif
return result;
}
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