operating system - execute bash commands in a c file and store the output in an array -

i'm trying store number of page faults array in c program. want execute bash command , store output of in array. here's command

$ cat /proc/vmstat | grep pgfault 

a simple start, can embellished , improved...

char * lines[2000];         /* 2000 lines enough? */ int    n = 0;  file * fp = popen("your command here", "r"); if (fp == null) abort();  lines[0] = malloc(1000);    /* 1000 byte lines enough? */ while ((fgets(lines[n], 1000, fp) != null) {     if (n == 1999) abort();       /* oh crud... */     lines[++n] = malloc(1000); } free(lines[n]); pclose(fp);