From 8c1ab65c0f548d20b7f177bdb736daaf603340e1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 15:54:38 +0200 Subject: Adding upstream version 0.0~git20221206.8b7148f. Signed-off-by: Daniel Baumann --- libc-top-half/musl/src/env/putenv.c | 53 +++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 libc-top-half/musl/src/env/putenv.c (limited to 'libc-top-half/musl/src/env/putenv.c') diff --git a/libc-top-half/musl/src/env/putenv.c b/libc-top-half/musl/src/env/putenv.c new file mode 100644 index 0000000..0d59895 --- /dev/null +++ b/libc-top-half/musl/src/env/putenv.c @@ -0,0 +1,53 @@ +#include +#include +#include + +static void dummy(char *old, char *new) {} +weak_alias(dummy, __env_rm_add); + +int __putenv(char *s, size_t l, char *r) +{ +#ifdef __wasilibc_unmodified_upstream // Lazy environment variable init. +#else +// This specialized header is included within the function body to arranges for +// the environment variables to be lazily initialized. It redefined `__environ`, +// so don't remove or reorder it with respect to other code. +#include "wasi/libc-environ-compat.h" +#endif + size_t i=0; + if (__environ) { + for (char **e = __environ; *e; e++, i++) + if (!strncmp(s, *e, l+1)) { + char *tmp = *e; + *e = s; + __env_rm_add(tmp, r); + return 0; + } + } + static char **oldenv; + char **newenv; + if (__environ == oldenv) { + newenv = realloc(oldenv, sizeof *newenv * (i+2)); + if (!newenv) goto oom; + } else { + newenv = malloc(sizeof *newenv * (i+2)); + if (!newenv) goto oom; + if (i) memcpy(newenv, __environ, sizeof *newenv * i); + free(oldenv); + } + newenv[i] = s; + newenv[i+1] = 0; + __environ = oldenv = newenv; + if (r) __env_rm_add(0, r); + return 0; +oom: + free(r); + return -1; +} + +int putenv(char *s) +{ + size_t l = __strchrnul(s, '=') - s; + if (!l || !s[l]) return unsetenv(s); + return __putenv(s, l, 0); +} -- cgit v1.2.3