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/* SPDX-License-Identifier: GPL-2.0-only */
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "amdfwtool.h"
void write_or_fail(int fd, void *ptr, size_t size)
{
ssize_t written;
written = write_from_buf_to_file(fd, ptr, size);
if (written < 0 || (size_t)written != size) {
fprintf(stderr, "%s: Error writing %zu bytes - written %zd bytes\n",
__func__, size, written);
exit(-1);
}
}
ssize_t read_from_file_to_buf(int fd, void *buf, size_t buf_size)
{
ssize_t bytes;
size_t total_bytes = 0;
do {
bytes = read(fd, buf + total_bytes, buf_size - total_bytes);
if (bytes == 0) {
fprintf(stderr, "Reached EOF probably\n");
break;
}
if (bytes < 0 && errno == EAGAIN)
bytes = 0;
if (bytes < 0) {
fprintf(stderr, "Read failure %s\n", strerror(errno));
return bytes;
}
total_bytes += bytes;
} while (total_bytes < buf_size);
if (total_bytes != buf_size) {
fprintf(stderr, "Read data size(%zu) != buffer size(%zu)\n",
total_bytes, buf_size);
return -1;
}
return buf_size;
}
ssize_t write_from_buf_to_file(int fd, const void *buf, size_t buf_size)
{
ssize_t bytes;
size_t total_bytes = 0;
do {
bytes = write(fd, buf + total_bytes, buf_size - total_bytes);
if (bytes < 0 && errno == EAGAIN)
bytes = 0;
if (bytes < 0) {
fprintf(stderr, "Write failure %s\n", strerror(errno));
lseek(fd, SEEK_CUR, -total_bytes);
return bytes;
}
total_bytes += bytes;
} while (total_bytes < buf_size);
if (total_bytes != buf_size) {
fprintf(stderr, "Wrote more data(%zu) than buffer size(%zu)\n",
total_bytes, buf_size);
lseek(fd, SEEK_CUR, -total_bytes);
return -1;
}
return buf_size;
}
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