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scripts: imx-image: Factor out a read_file function 

The same code will be used a second time in a followup patch, so
factor out a common function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2016-02-02 09:48:13 +01:00
parent 7dede160a8
commit 912f66935a
1 changed files with 30 additions and 16 deletions
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46
scripts/imx/imx-image.c
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@ -570,6 +570,34 @@ static int hab_sign(struct config_data *data)
return 0;
}
static void *read_file(const char *filename, size_t *size)
{
int fd, ret;
void *buf;
struct stat s;
fd = open(filename, O_RDONLY);
if (fd < 0) {
perror("open");
exit(1);
}
ret = fstat(fd, &s);
if (ret)
return NULL;
*size = s.st_size;
buf = malloc(*size);
if (!buf)
exit(1);
xread(fd, buf, *size);
close(fd);
return buf;
}
int main(int argc, char *argv[])
{
int opt, ret;
@ -579,7 +607,7 @@ int main(int argc, char *argv[])
size_t insize;
void *infile;
struct stat s;
int infd, outfd;
int outfd;
int dcd_only = 0;
int now = 0;
int sign_image = 0;
@ -704,24 +732,10 @@ int main(int argc, char *argv[])
exit(1);
}
infd = open(imagename, O_RDONLY);
if (infd < 0) {
perror("open");
exit(1);
}
ret = fstat(infd, &s);
if (ret)
return ret;
insize = s.st_size;
infile = malloc(insize);
infile = read_file(imagename, &insize);
if (!infile)
exit(1);
xread(infd, infile, insize);
close(infd);
outfd = open(data.outfile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (outfd < 0) {
perror("open");