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util: replace fseek/ftell/rewind with fstat

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It's a more direct approach to get the file size.

Change-Id: If49df26bf4996bd556c675f3a673d0003b4adf89
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/6594
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Patrick Georgi
2014-08-11 09:27:18 +02:00
parent 77b182a31a
commit 32eeff4b6e
3 changed files with 41 additions and 12 deletions
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20
util/cbfstool/common.c
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@@ -22,6 +22,9 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <libgen.h>
#include "common.h"
#include "cbfs.h"
@@ -40,6 +43,14 @@ int is_big_endian(void)
return 0;
}
static off_t get_file_size(FILE *f)
{
struct stat s;
int fd = fileno(f);
if (fd == -1) return -1;
if (fstat(fd, &s) == -1) return -1;
return s.st_size;
}
/* Buffer and file I/O */
int buffer_create(struct buffer *buffer, size_t size, const char *name) {
@@ -59,10 +70,13 @@ int buffer_from_file(struct buffer *buffer, const char *filename) {
perror(filename);
return -1;
}
fseek(fp, 0, SEEK_END);
buffer->size = ftell(fp);
buffer->size = get_file_size(fp);
if (buffer->size == -1) {
fprintf(stderr, "could not determine size of %s\n", filename);
fclose(fp);
return -1;
}
buffer->name = strdup(filename);
rewind(fp);
buffer->data = (char *)malloc(buffer->size);
assert(buffer->data);
if (fread(buffer->data, 1, buffer->size, fp) != buffer->size) {