From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001 From: Kacper Date: Sun, 7 Dec 2025 20:10:31 +0100 Subject: Add build system scaffolding and libc headers --- lib/libc/stdlib/getenv.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 lib/libc/stdlib/getenv.c (limited to 'lib/libc/stdlib/getenv.c') diff --git a/lib/libc/stdlib/getenv.c b/lib/libc/stdlib/getenv.c new file mode 100644 index 00000000..deb2b5f7 --- /dev/null +++ b/lib/libc/stdlib/getenv.c @@ -0,0 +1,33 @@ +#include +#include +#include + +extern char **environ; + +char *getenv(const char *name) +{ + LIBC_LOCK(libc.lock.environ); + + for (char **env = environ; *env; env++) { + char *eq = NULL; + for (char *p = *env; *p; p++) { + if (*p == '=') { + eq = p; + break; + } + if (name[p - *env] != *p) { + break; + } + } + if (eq && name[eq - *env] == '\0') { + LIBC_UNLOCK(libc.lock.environ); + return eq + 1; + } + } + + LIBC_UNLOCK(libc.lock.environ); + + return NULL; +} + +weak_reference(getenv, secure_getenv); -- cgit v1.2.3