ref: 72154ee31c060546f417db8094554ce8940df181
dir: /lib/c/target/posix/getenv.c/
#include <stdlib.h> #include <string.h> #undef getenv extern char **_environ; char * getenv(const char *name) { char **p; size_t len = strlen(name); for (p = _environ; *p; ++p) { if (!memcmp(name, *p, len) && (*p)[len] == '=') break; } if (!*p) return NULL; return &(*p)[len]; }