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getenv: return NULL if empty #2574

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Making an environment variable empty can be a way of unsetting it for
platforms that don't support unsetenv(). In most cases, we treat empty
variables as having been unset. For all others, use os_env_exists().
This commit is contained in:
Scott Prager
2015-05-03 09:25:53 -04:00
parent fa0f122221
commit 412d246be7
10 changed files with 67 additions and 60 deletions
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5
src/nvim/msgpack_rpc/server.c
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@@ -16,6 +16,7 @@
#include "nvim/log.h"
#include "nvim/tempfile.h"
#include "nvim/path.h"
#include "nvim/strings.h"
#define MAX_CONNECTIONS 32
#define ADDRESS_MAX_SIZE 256
@@ -59,7 +60,7 @@ bool server_init(void)
bool must_free = false;
const char *listen_address = os_getenv(LISTEN_ADDRESS_ENV_VAR);
if (listen_address == NULL || *listen_address == NUL) {
if (listen_address == NULL) {
must_free = true;
listen_address = (char *)vim_tempname();
}
@@ -216,7 +217,7 @@ int server_start(const char *endpoint)
// Update $NVIM_LISTEN_ADDRESS, if not set.
const char *listen_address = os_getenv(LISTEN_ADDRESS_ENV_VAR);
if (listen_address == NULL || *listen_address == NUL) {
if (listen_address == NULL) {
os_setenv(LISTEN_ADDRESS_ENV_VAR, addr, 1);
}