suckless/slstatus

components/run_command.c in master
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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}