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C/C++ Source or Header  |  1979-01-10  |  548 b   |  40 lines
  1. #include    <stdio.h>
  2.  
  3. getpw(uid, buf)
  4. int uid;
  5. char buf[];
  6. {
  7.     static FILE *pwf;
  8.     register n, c;
  9.     register char *bp;
  10.  
  11.     if(pwf == 0)
  12.         pwf = fopen("/etc/passwd", "r");
  13.     if(pwf == NULL)
  14.         return(1);
  15.     rewind(pwf);
  16.  
  17.     for (;;) {
  18.         bp = buf;
  19.         while((c=getc(pwf)) != '\n') {
  20.             if(c == EOF)
  21.                 return(1);
  22.             *bp++ = c;
  23.         }
  24.         *bp++ = '\0';
  25.         bp = buf;
  26.         n = 3;
  27.         while(--n)
  28.         while((c = *bp++) != ':')
  29.             if(c == '\n')
  30.                 return(1);
  31.         while((c = *bp++) != ':') {
  32.             if(c<'0' || c>'9')
  33.                 continue;
  34.             n = n*10+c-'0';
  35.         }
  36.         if(n == uid)
  37.             return(0);
  38.     }
  39. }
  40.