From b941095f28d13288100dae54e14925ae41fd987c Mon Sep 17 00:00:00 2001 From: Craig Tiller Date: Mon, 1 Feb 2016 14:10:27 -0800 Subject: [PATCH] Comments --- src/core/support/env_linux.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/core/support/env_linux.c b/src/core/support/env_linux.c index 183bcd2bd0a..7bfd8415f8c 100644 --- a/src/core/support/env_linux.c +++ b/src/core/support/env_linux.c @@ -49,11 +49,19 @@ #include "src/core/support/string.h" +/* Declare weak symbols for versions of secure_getenv that *may* be + * on a users machine. Older libc's call this __secure_getenv, even + * older don't support the functionality. + * + * If a symbol is not present, these will be equal to NULL. + */ char *__attribute__((weak)) secure_getenv(const char *name); char *__attribute__((weak)) __secure_getenv(const char *name); char *gpr_getenv(const char *name) { static char *(*getenv_func)(const char *) = secure_getenv; + /* Check to see which getenv variant is supported (go from most + * to least secure */ if (getenv_func == NULL) { getenv_func = __secure_getenv; if (getenv_func == NULL) {