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/**
* SPDX-License-Identifier: Apache-2.0
*
* @file file-util.c
* @brief EINTR safe file functions
*/
#include "file-util.h"
#include <errno.h>
#include <stdint.h>
#include <unistd.h>
/**
* INTR safe read
* Interface spec is similar to read system call.
*/
ssize_t safe_read(int fd, void *buf, size_t count)
{
ssize_t size = 0, ressize = 0;
size_t reqsize = 0;
uint8_t *pbuf = NULL;
pbuf = (uint8_t *) buf;
reqsize = count;
do {
size = read(fd, pbuf, (reqsize - ressize));
if (size < 0) {
if (errno == EINTR) {
continue;
} else {
ressize = size;
break;
}
}
pbuf += size;
ressize += size;
} while ((ressize < reqsize) && (size != 0));
return ressize;
}
/**
* INTR safe write
* Interface spec is similar to write system call.
*/
ssize_t safe_write(int fd, void *buf, size_t count)
{
ssize_t size = 0, ressize = 0;
size_t reqsize = 0;
uint8_t *pbuf = NULL;
pbuf = (uint8_t *) buf;
reqsize = count;
do {
size = write(fd, pbuf, (reqsize - ressize));
if (size < 0) {
if (errno == EINTR) {
continue;
} else {
ressize = size;
break;
}
}
pbuf += size;
ressize += size;
} while ((ressize < reqsize) && (size != 0));
return ressize;
}
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