stdio.c revision 31707708c585c53b61ca1edb2e224e6bb1b985a5
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews/*
54db0529dcab47d08996454a076c5e4a0d75e5d2Mark Andrews * Copyright (C) 2004, 2007, 2011, 2012 Internet Systems Consortium, Inc. ("ISC")
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * Copyright (C) 2000, 2001 Internet Software Consortium.
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews *
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * Permission to use, copy, modify, and/or distribute this software for any
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * purpose with or without fee is hereby granted, provided that the above
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * copyright notice and this permission notice appear in all copies.
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews *
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews * PERFORMANCE OF THIS SOFTWARE.
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews */
5d51e67c3b4f35c1be742574aacc1d88fe6ed444Mark Andrews
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews/* $Id$ */
f7b99290c31abeb20c55fc55391510450ce60423Mark Andrews
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews#include <config.h>
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews#include <errno.h>
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews#include <unistd.h>
94a3bcd132e515b4baa0884ba9dd0f361d2e17bcMark Andrews
#include <isc/stdio.h>
#include <isc/stat.h>
#include <isc/util.h>
#include "errno2result.h"
isc_result_t
isc_stdio_open(const char *filename, const char *mode, FILE **fp) {
FILE *f;
f = fopen(filename, mode);
if (f == NULL)
return (isc__errno2result(errno));
*fp = f;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_stdio_close(FILE *f) {
int r;
r = fclose(f);
if (r == 0)
return (ISC_R_SUCCESS);
else
return (isc__errno2result(errno));
}
isc_result_t
isc_stdio_seek(FILE *f, off_t offset, int whence) {
int r;
r = fseeko(f, offset, whence);
if (r == 0)
return (ISC_R_SUCCESS);
else
return (isc__errno2result(errno));
}
isc_result_t
isc_stdio_tell(FILE *f, off_t *offsetp) {
off_t r;
REQUIRE(offsetp != NULL);
r = ftello(f);
if (r >= 0) {
*offsetp = r;
return (ISC_R_SUCCESS);
} else
return (isc__errno2result(errno));
}
isc_result_t
isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) {
isc_result_t result = ISC_R_SUCCESS;
size_t r;
clearerr(f);
r = fread(ptr, size, nmemb, f);
if (r != nmemb) {
if (feof(f))
result = ISC_R_EOF;
else
result = isc__errno2result(errno);
}
if (nret != NULL)
*nret = r;
return (result);
}
isc_result_t
isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f,
size_t *nret)
{
isc_result_t result = ISC_R_SUCCESS;
size_t r;
clearerr(f);
r = fwrite(ptr, size, nmemb, f);
if (r != nmemb)
result = isc__errno2result(errno);
if (nret != NULL)
*nret = r;
return (result);
}
isc_result_t
isc_stdio_flush(FILE *f) {
int r;
r = fflush(f);
if (r == 0)
return (ISC_R_SUCCESS);
else
return (isc__errno2result(errno));
}
/*
* OpenBSD has deprecated ENOTSUP in favor of EOPNOTSUPP.
*/
#if defined(EOPNOTSUPP) && !defined(ENOTSUP)
#define ENOTSUP EOPNOTSUPP
#endif
isc_result_t
isc_stdio_sync(FILE *f) {
int r;
r = fsync(fileno(f));
/*
* fsync is not supported on sockets and pipes which
* result in EINVAL / ENOTSUP.
*/
if (r == 0 || errno == EINVAL || errno == ENOTSUP)
return (ISC_R_SUCCESS);
else
return (isc__errno2result(errno));
}