summaryrefslogtreecommitdiff
path: root/components/run_command.c
blob: 942f3c46353cc58f18b0c04a180a5ca76494fcde (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <string.h>

#include "../slstatus.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;
}