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Fix -Wunused-result problems

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This commit is contained in:
Drew DeVault 2016-04-29 10:59:43 -04:00
parent 3fa8df7b05
commit ebdce719b4
1 changed files with 11 additions and 3 deletions
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14
sway/commands.c
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@ -509,7 +509,9 @@ static struct cmd_results *cmd_exec_always(int argc, char **argv) {
sway_log(L_DEBUG, "Executing %s", cmd);
int fd[2];
pipe(fd);
if (pipe(fd) != 0) {
sway_log(L_ERROR, "Unable to create pipe for fork");
}
pid_t pid;
pid_t *child = malloc(sizeof(pid_t)); // malloc'd so that Linux can avoid copying the process space
@ -522,14 +524,20 @@ static struct cmd_results *cmd_exec_always(int argc, char **argv) {
/* Not reached */
}
close(fd[0]);
write(fd[1], child, sizeof(pid_t));
ssize_t s = 0;
while ((size_t)s < sizeof(pid_t)) {
s += write(fd[1], ((uint8_t *)child) + s, sizeof(pid_t));
}
close(fd[1]);
_exit(0); // Close child process
} else if (pid < 0) {
return cmd_results_new(CMD_FAILURE, "exec_always", "Command failed (sway could not fork).");
}
close(fd[1]); // close write
read(fd[0], child, sizeof(pid_t));
ssize_t s = 0;
while ((size_t)s < sizeof(pid_t)) {
s += read(fd[0], ((uint8_t *)child) + s, sizeof(pid_t));
}
close(fd[0]);
// cleanup child process
wait(0);