getenv.c (304B)
1 #include <stdlib.h> 2 #include <string.h> 3 4 #undef getenv 5 6 extern const char **_environ; 7 8 char * 9 getenv(const char *name) 10 { 11 const char **p, *s; 12 size_t len = strlen(name); 13 14 for (p = _environ; s = *p; ++p) { 15 if (!strncmp(name, s, len) && s[len] == '=') 16 return (char *) s + len + 1; 17 } 18 return NULL; 19 }