Fix unused-result error
@@ -187,7 +187,10 @@ static void write_image(const char *filename, int width, int height) {
sprintf(size, "%dx%d+0", width, height);
int fd[2];
- pipe(fd);
+ if (pipe(fd) != 0) {
+ fprintf(stderr, "cannot create pipe: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
pid_t child = fork();
if (child < 0) {
@@ -195,7 +198,10 @@ static void write_image(const char *filename, int width, int height) {
exit(EXIT_FAILURE);
} else if (child != 0) {
close(fd[0]);
- write(fd[1], data, buffer_stride * height);
+ if (write(fd[1], data, buffer_stride * height) < 0) {
+ fprintf(stderr, "write() failed: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
close(fd[1]);
free(data);
waitpid(child, NULL, 0);
