| getenv.c (169138) | getenv.c (169177) |
|---|---|
| 1/* 2 * Copyright (c) 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if defined(LIBC_SCCS) && !defined(lint) 31static char sccsid[] = "@(#)getenv.c 8.1 (Berkeley) 6/4/93"; 32#endif /* LIBC_SCCS and not lint */ 33#include <sys/cdefs.h> | 1/* 2 * Copyright (c) 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if defined(LIBC_SCCS) && !defined(lint) 31static char sccsid[] = "@(#)getenv.c 8.1 (Berkeley) 6/4/93"; 32#endif /* LIBC_SCCS and not lint */ 33#include <sys/cdefs.h> |
| 34__FBSDID("$FreeBSD: head/lib/libc/stdlib/getenv.c 169138 2007-04-30 16:56:18Z ache $"); | 34__FBSDID("$FreeBSD: head/lib/libc/stdlib/getenv.c 169177 2007-05-01 16:02:44Z ache $"); |
| 35 36#include <stdlib.h> 37#include <stddef.h> 38#include <string.h> 39 40inline char *__findenv(const char *, int *); 41 42/* 43 * __findenv -- 44 * Returns pointer to value associated with name, if any, else NULL. 45 * Sets offset to be the offset of the name/value combination in the | 35 36#include <stdlib.h> 37#include <stddef.h> 38#include <string.h> 39 40inline char *__findenv(const char *, int *); 41 42/* 43 * __findenv -- 44 * Returns pointer to value associated with name, if any, else NULL. 45 * Sets offset to be the offset of the name/value combination in the |
| 46 * environmental array, for use by putenv(3), setenv(3) and unsetenv(3). | 46 * environmental array, for use by setenv(3) and unsetenv(3). |
| 47 * Explicitly removes '=' in argument name. 48 * 49 * This routine *should* be a static; don't use it. 50 */ 51inline char * 52__findenv(name, offset) 53 const char *name; 54 int *offset; 55{ 56 extern char **environ; 57 int len, i; 58 const char *np; 59 char **p, *cp; 60 | 47 * Explicitly removes '=' in argument name. 48 * 49 * This routine *should* be a static; don't use it. 50 */ 51inline char * 52__findenv(name, offset) 53 const char *name; 54 int *offset; 55{ 56 extern char **environ; 57 int len, i; 58 const char *np; 59 char **p, *cp; 60 |
| 61 if (environ == NULL) | 61 if (name == NULL || environ == NULL) |
| 62 return (NULL); 63 for (np = name; *np && *np != '='; ++np) 64 continue; 65 len = np - name; 66 for (p = environ; (cp = *p) != NULL; ++p) { 67 for (np = name, i = len; i && *cp; i--) 68 if (*cp++ != *np++) 69 break; --- 10 unchanged lines hidden (view full) --- 80 * Returns ptr to value associated with name, if any, else NULL. 81 */ 82char * 83getenv(name) 84 const char *name; 85{ 86 int offset; 87 | 62 return (NULL); 63 for (np = name; *np && *np != '='; ++np) 64 continue; 65 len = np - name; 66 for (p = environ; (cp = *p) != NULL; ++p) { 67 for (np = name, i = len; i && *cp; i--) 68 if (*cp++ != *np++) 69 break; --- 10 unchanged lines hidden (view full) --- 80 * Returns ptr to value associated with name, if any, else NULL. 81 */ 82char * 83getenv(name) 84 const char *name; 85{ 86 int offset; 87 |
| 88 if (name == NULL || !*name || strchr(name, '=') != NULL) 89 return (NULL); 90 | |
| 91 return (__findenv(name, &offset)); 92} | 88 return (__findenv(name, &offset)); 89} |