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Fix unused-result error

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This commit is contained in:
Tancredi Orlando 2017-11-11 16:47:54 +01:00
parent a538ef33c1
commit 029f2c05bb
1 changed files with 8 additions and 2 deletions
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10
examples/screenshot.c
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@ -187,7 +187,10 @@ static void write_image(const char *filename, int width, int height) {
sprintf(size, "%dx%d+0", width, height); sprintf(size, "%dx%d+0", width, height);
int fd[2]; 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(); pid_t child = fork();
if (child < 0) { if (child < 0) {
@ -195,7 +198,10 @@ static void write_image(const char *filename, int width, int height) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} else if (child != 0) { } else if (child != 0) {
close(fd[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]); close(fd[1]);
free(data); free(data);
waitpid(child, NULL, 0); waitpid(child, NULL, 0);