slstatus/components/run_command.c
2018-05-20 01:01:26 +02:00

32 lines
503 B
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "../util.h"
const char *
run_command(const char *cmd)
{
char *p;
FILE *fp;
if (!(fp = popen(cmd, "r"))) {
warn("popen '%s':", cmd);
return NULL;
}
p = fgets(buf, sizeof(buf) - 1, fp);
if (pclose(fp) < 0) {
warn("pclose '%s':", cmd);
return NULL;
}
if (!p) {
return NULL;
}
if ((p = strrchr(buf, '\n'))) {
p[0] = '\0';
}
return buf[0] ? buf : NULL;
}