2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
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18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
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33 * @(#)getenv.c 8.1 (Berkeley) 6/4/93
34 * $DragonFly: src/lib/libc/stdlib/getenv.c,v 1.4 2003/09/06 08:19:16 asmodai Exp $
41 inline char *__findenv (const char *, int *);
45 * Returns pointer to value associated with name, if any, else NULL.
46 * Sets offset to be the offset of the name/value combination in the
47 * environmental array, for use by setenv(3) and unsetenv(3).
48 * Explicitly removes '=' in argument name.
50 * This routine *should* be a static; don't use it.
53 __findenv(name, offset)
57 extern char **environ;
62 if (name == NULL || environ == NULL)
64 for (np = name; *np && *np != '='; ++np)
67 for (p = environ; (cp = *p) != NULL; ++p) {
68 for (np = name, i = len; i && *cp; i--)
71 if (i == 0 && *cp++ == '=') {
72 *offset = p - environ;
81 * Returns ptr to value associated with name, if any, else NULL.
89 return (__findenv(name, &offset));