| 1 | /* @(#)getpw.c 4.1 (Berkeley) %G% */ |
| 2 | #include <stdio.h> |
| 3 | |
| 4 | getpw(uid, buf) |
| 5 | int uid; |
| 6 | char buf[]; |
| 7 | { |
| 8 | static FILE *pwf; |
| 9 | register n, c; |
| 10 | register char *bp; |
| 11 | |
| 12 | if(pwf == 0) |
| 13 | pwf = fopen("/etc/passwd", "r"); |
| 14 | if(pwf == NULL) |
| 15 | return(1); |
| 16 | rewind(pwf); |
| 17 | |
| 18 | for (;;) { |
| 19 | bp = buf; |
| 20 | while((c=getc(pwf)) != '\n') { |
| 21 | if(c == EOF) |
| 22 | return(1); |
| 23 | *bp++ = c; |
| 24 | } |
| 25 | *bp++ = '\0'; |
| 26 | bp = buf; |
| 27 | n = 3; |
| 28 | while(--n) |
| 29 | while((c = *bp++) != ':') |
| 30 | if(c == '\n') |
| 31 | return(1); |
| 32 | while((c = *bp++) != ':') { |
| 33 | if(c<'0' || c>'9') |
| 34 | continue; |
| 35 | n = n*10+c-'0'; |
| 36 | } |
| 37 | if(n == uid) |
| 38 | return(0); |
| 39 | } |
| 40 | } |