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envcrc: check return value of fwrite()

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Newer toolchains will often complain about unchecked fwrite():
	envcrc.c:117: warning: ignoring return value of `fwrite, declared
		with attribute warn_unused_result

So check the return value to silence the warnings.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-10-18 20:43:14 -04:00 committed by Wolfgang Denk
parent efd988ebaa
commit f67066b6b0
1 changed files with 3 additions and 1 deletions
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4
tools/envcrc.c
View file

@ -21,6 +21,7 @@
* MA 02111-1307 USA
*/
#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
@ -114,7 +115,8 @@ int main (int argc, char **argv)
}
for (i = start; i != end; i += step)
printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
fwrite(dataptr, 1, datasize, stdout);
if (fwrite(dataptr, 1, datasize, stdout) != datasize)
fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
} else {
printf("CRC32 from offset %08X to %08X of environment = %08X\n",
(unsigned int) (dataptr - envptr),