| 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 | char copyright[] = |
| 9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 10 | All rights reserved.\n"; |
| 11 | #endif not lint |
| 12 | |
| 13 | #ifndef lint |
| 14 | static char sccsid[] = "@(#)printenv.c 5.1 (Berkeley) %G%"; |
| 15 | #endif not lint |
| 16 | |
| 17 | /* |
| 18 | * printenv |
| 19 | * |
| 20 | * Bill Joy, UCB |
| 21 | * February, 1979 |
| 22 | */ |
| 23 | |
| 24 | extern char **environ; |
| 25 | |
| 26 | main(argc, argv) |
| 27 | int argc; |
| 28 | char *argv[]; |
| 29 | { |
| 30 | register char **ep; |
| 31 | int found = 0; |
| 32 | |
| 33 | argc--, argv++; |
| 34 | if (environ) |
| 35 | for (ep = environ; *ep; ep++) |
| 36 | if (argc == 0 || prefix(argv[0], *ep)) { |
| 37 | register char *cp = *ep; |
| 38 | |
| 39 | found++; |
| 40 | if (argc) { |
| 41 | while (*cp && *cp != '=') |
| 42 | cp++; |
| 43 | if (*cp == '=') |
| 44 | cp++; |
| 45 | } |
| 46 | printf("%s\n", cp); |
| 47 | } |
| 48 | exit (!found); |
| 49 | } |
| 50 | |
| 51 | prefix(cp, dp) |
| 52 | char *cp, *dp; |
| 53 | { |
| 54 | |
| 55 | while (*cp && *dp && *cp == *dp) |
| 56 | cp++, dp++; |
| 57 | if (*cp == 0) |
| 58 | return (*dp == '='); |
| 59 | return (0); |
| 60 | } |