slstatus/components/run_command.c
Aaron Marcher faa52bdcc0 Format error messages properly
Make use of strerror(errno) and format all errors equally:
function ['parameters']: error message
2018-03-28 19:46:27 +02:00

28 lines
487 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;
fp = popen(cmd, "r");
if (fp == NULL) {
fprintf(stderr, "popen '%s': %s\n", cmd, strerror(errno));
return NULL;
}
p = fgets(buf, sizeof(buf) - 1, fp);
pclose(fp);
if (!p)
return NULL;
if ((p = strrchr(buf, '\n')) != NULL)
p[0] = '\0';
return buf[0] ? buf : NULL;
}