slstatus/components/run_command.c
Aaron Marcher ee5ec75621 Fix coding style
- Use block for single statement ifs
- Keep lines to reasonable length (current debate as to reasonable)
- When functions return -1 for error test against 0 not -1
- Do not indent cases another level
- Do not test against NULL and 0 explicitly
- Use tabs for indentation, use spaces for alignment
2018-05-06 22:28:56 +02:00

28 lines
479 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;
if (!(fp = popen(cmd, "r"))) {
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'))) {
p[0] = '\0';
}
return buf[0] ? buf : NULL;
}