Find lines matching a pattern

#include <stdio.h>

#define MAXLINE  1000   /*maximum input line length */

int getline(char line[], int max);
int strindex(char source[], char searchfor[]);
char pattern[] = "ould";   /*pattern to search for */
/*find all lines matching pattern */
main()
{
    char line[MAXLINE];
    int found = 0;
     while (getline(line, MAXLINE) > 0)
         if (strindex(line, pattern) >= 0) {
            printf("%s", line);
            found++;
         }
    return found;
}

/*getline: get line into s, return length */
int getline(char s[], int lim){
     int c, i;

     i = 0;
     while(--lim > 0 && (c =getchar()) != EOF && c != '\n')
          s[i++] = c;
     if (c == '\n')
         s[i++] = c;
     s[i] = '\0';
     return i;
}

/*strindex: return index of t in s, -1 if none */
int strindex(char s[], char t[])
{
   int i, j, k;

   for(i = 0; s[i] != '\0';i++){
      for (j =i, k= 0; t[k] != '\0' && s[j] == t[k];j++, k++)
           ;
      if(k > 0 && t[k] == '\0')
         return i;
   }
  return -1;
}