/contrib/bind9/lib/isc/unix/stdio.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 129 lines · 84 code · 21 blank · 24 comment · 24 complexity · 85c31edab4ed3d830d939db9f3bf7ce5 MD5 · raw file
- /*
- * Copyright (C) 2004, 2007, 2011, 2012 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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.
- */
- /* $Id$ */
- #include <config.h>
- #include <errno.h>
- #include <unistd.h>
- #include <isc/stdio.h>
- #include <isc/stat.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, long offset, int whence) {
- int r;
- r = fseek(f, offset, whence);
- if (r == 0)
- 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));
- }