| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)getpw.c 5.1 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include <stdio.h> |
| 12 | |
| 13 | getpw(uid, buf) |
| 14 | int uid; |
| 15 | char buf[]; |
| 16 | { |
| 17 | static FILE *pwf; |
| 18 | register n, c; |
| 19 | register char *bp; |
| 20 | |
| 21 | if(pwf == 0) |
| 22 | pwf = fopen("/etc/passwd", "r"); |
| 23 | if(pwf == NULL) |
| 24 | return(1); |
| 25 | rewind(pwf); |
| 26 | |
| 27 | for (;;) { |
| 28 | bp = buf; |
| 29 | while((c=getc(pwf)) != '\n') { |
| 30 | if(c == EOF) |
| 31 | return(1); |
| 32 | *bp++ = c; |
| 33 | } |
| 34 | *bp++ = '\0'; |
| 35 | bp = buf; |
| 36 | n = 3; |
| 37 | while(--n) |
| 38 | while((c = *bp++) != ':') |
| 39 | if(c == '\n') |
| 40 | return(1); |
| 41 | while((c = *bp++) != ':') { |
| 42 | if(c<'0' || c>'9') |
| 43 | continue; |
| 44 | n = n*10+c-'0'; |
| 45 | } |
| 46 | if(n == uid) |
| 47 | return(0); |
| 48 | } |
| 49 | } |