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utilfdt_read: pass back up the length of data read

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For a follow up commit, we want to be able to scan the buffer that was
returned to us.  In order to do that safely, we need to know how big
the buffer actually is, so pass that back if requested.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2013-04-10 14:29:07 -04:00 • committed by Jon Loeliger
parent f8cb5dd949
commit cc2c178727
5 changed files with 12 additions and 8 deletions
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8
util.c
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@ -197,7 +197,7 @@ char get_escape_char(const char *s, int *i)
return val;
}
int utilfdt_read_err(const char *filename, char **buffp)
int utilfdt_read_err(const char *filename, char **buffp, off_t *len)
{
int fd = 0; /* assume stdin */
char *buf = NULL;
@ -238,13 +238,15 @@ int utilfdt_read_err(const char *filename, char **buffp)
free(buf);
else
*buffp = buf;
if (len)
*len = bufsize;
return ret;
}
char *utilfdt_read(const char *filename)
char *utilfdt_read(const char *filename, off_t *len)
{
char *buff;
int ret = utilfdt_read_err(filename, &buff);
int ret = utilfdt_read_err(filename, &buff, len);
if (ret) {
fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename,