run_command.c

   1 #include <err.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 #include "util.h"
   6
   7 const char *
   8 run_command(const char *cmd)
   9 {
  10         char *p;
  11         FILE *fp;
  12
  13         fp = popen(cmd, "r");
  14         if (fp == NULL) {
  15                 warn("Failed to get command output for %s", cmd);
  16                 return NULL;
  17         }
  18         p = fgets(buf, sizeof(buf) - 1, fp);
  19         pclose(fp);
  20         if (!p)
  21                 return NULL;
  22         if ((p = strrchr(buf, '\n')) != NULL)
  23                 p[0] = '\0';
  24
  25         return buf[0] ? buf : NULL;
  26 }