slstatus/components/run_command.c

32 lines
501 B
C

/* 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;
}