projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 22e155fc DF |
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 | ||
| 18745775 BJ |
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 | } |