autoconf: Add checking for unsetenv function

diff --git a/pager.c b/pager.c
index 5f280ab52720772905cacbcba522ecc9c81bb529..0376953cb1b8a4095346e0d12ecef6e7db9c48c9 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -1,12 +1,12 @@
 #include "cache.h"
 
-#include <sys/select.h>
-
 /*
  * This is split up from the rest of git so that we might do
  * something different on Windows, for example.
  */
 
+static int spawned_pager;
+
 static void run_pager(const char *pager)
 {
        /*
@@ -31,6 +31,11 @@ void setup_pager(void)
 
        if (!isatty(1))
                return;
+       if (!pager) {
+               if (!pager_program)
+                       git_config(git_default_config);
+               pager = pager_program;
+       }
        if (!pager)
                pager = getenv("PAGER");
        if (!pager)
@@ -38,7 +43,7 @@ void setup_pager(void)
        else if (!*pager || !strcmp(pager, "cat"))
                return;
 
-       pager_in_use = 1; /* means we are emitting to terminal */
+       spawned_pager = 1; /* means we are emitting to terminal */
 
        if (pipe(fd) < 0)
                return;
@@ -67,3 +72,14 @@ void setup_pager(void)
        die("unable to execute pager '%s'", pager);
        exit(255);
 }
+
+int pager_in_use(void)
+{
+       const char *env;
+
+       if (spawned_pager)
+               return 1;
+
+       env = getenv("GIT_PAGER_IN_USE");
+       return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0;
+}