run_command.c (501B) download
1/* See LICENSE file for copyright and license details. */
2#include <stdio.h>
3#include <string.h>
4
5#include "../slstatus.h"
6#include "../util.h"
7
8const char *
9run_command(const char *cmd)
10{
11 char *p;
12 FILE *fp;
13
14 if (!(fp = popen(cmd, "r"))) {
15 warn("popen '%s':", cmd);
16 return NULL;
17 }
18
19 p = fgets(buf, sizeof(buf) - 1, fp);
20 if (pclose(fp) < 0) {
21 warn("pclose '%s':", cmd);
22 return NULL;
23 }
24 if (!p)
25 return NULL;
26
27 if ((p = strrchr(buf, '\n')))
28 p[0] = '\0';
29
30 return buf[0] ? buf : NULL;
31}