/*
* Copyright (c) 2018 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libc
* @{
*/
/** @file C standard file manipulation functions
*/
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <str.h>
#include <str_error.h>
#include <tmpfile.h>
#include <vfs/vfs.h>
/** Static buffer for tmpnam function */
static char tmpnam_buf[L_tmpnam];
/** Get stream position.
*
* @param stream Stream
* @param pos Place to store position
*
* @return Zero on success, non-zero on failure
*/
int fgetpos(FILE *stream, fpos_t *pos)
{
off64_t p;
p = ftell64(stream);
if (p < 0)
return -1;
pos->pos = p;
return 0;
}
/** Get stream position.
*
* @param stream Stream
* @param pos Position
*
* @return Zero on sucess, non-zero on failure
*/
int fsetpos(FILE *stream, const fpos_t *pos)
{
int rc;
rc = fseek64(stream, pos->pos, SEEK_SET);
if (rc < 0)
return -1;
return 0;
}
/** Rename file or directory (C standard) */
int rename(const char *old_path, const char *new_path)
{
errno_t rc;
rc = vfs_rename_path(old_path, new_path);
if (rc != EOK) {
/*
* Note that ISO C leaves the value of errno undefined,
* whereas according to UN*X standards, it is set.
*/
errno = rc;
return -1;
}
return 0;
}
/** Remove file or directory (C standard) */
int remove(const char *path)
{
errno_t rc;
rc = vfs_unlink_path(path);
if (rc != EOK) {
/*
* Note that ISO C leaves the value of errno undefined,
* whereas according to UN*X standards, it is set.
*/
errno = rc;
return -1;
}
return 0;
}
/** Create a temporary file.
*
* @return Open stream descriptor or @c NULL on error. In that case
* errno is set (UN*X). Note that ISO C leaves the value of errno
* undefined.
*/
FILE *tmpfile(void)
{
int file;
FILE *stream;
file = __tmpfile();
if (file < 0) {
printf("file is < 0\n");
errno = EEXIST;
return NULL;
}
stream = fdopen(file, "w+");
if (stream == NULL) {
printf("stream = NULL\n");
vfs_put(file);
errno = EACCES;
return NULL;
}
return stream;
}
/** Create name for a temporary file.
*
* @param s Pointer to array of at least L_tmpnam bytes or @c NULL.
* @return The pointer @a s or pointer to internal static buffer on success,
* @c NULL on error.
*/
char *tmpnam(char *s)
{
char *p;
p = (s != NULL) ? s : tmpnam_buf;
return __tmpnam(p);
}
/** Print error message and string representation of @c errno.
*
* @param s Error message
*/
void perror(const char *s)
{
if (s != NULL && *s != '\0')
fprintf(stderr, "%s: %s\n", s, str_error(errno));
else
fprintf(stderr, "%s\n", str_error(errno));
}
/** @}
*/