close file on error in read_mmfile()

[git.git] / pager.c

diff --git a/pager.c b/pager.c
index f19ddbc87df04f117cd5e39189c8322fd5f29d68..92c03f654abd0333bd0dd48b4aebf9ae42ac4de5 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -1,5 +1,10 @@
 #include "cache.h"
 #include "run-command.h"
+#include "sigchain.h"
+
+#ifndef DEFAULT_PAGER
+#define DEFAULT_PAGER "less"
+#endif
 
 /*
  * This is split up from the rest of git so that we can do
@@ -8,7 +13,7 @@
 
 static int spawned_pager;
 
-#ifndef __MINGW32__
+#ifndef WIN32
 static void pager_preexec(void)
 {
        /*
@@ -20,8 +25,6 @@ static void pager_preexec(void)
        FD_ZERO(&in);
        FD_SET(0, &in);
        select(1, &in, NULL, &in, NULL);
-
-       setenv("LESS", "FRSX", 0);
 }
 #endif
 
@@ -38,12 +41,21 @@ static void wait_for_pager(void)
        finish_command(&pager_process);
 }
 
-void setup_pager(void)
+static void wait_for_pager_signal(int signo)
 {
-       const char *pager = getenv("GIT_PAGER");
+       wait_for_pager();
+       sigchain_pop(signo);
+       raise(signo);
+}
+
+const char *git_pager(void)
+{
+       const char *pager;
 
        if (!isatty(1))
-               return;
+               return NULL;
+
+       pager = getenv("GIT_PAGER");
        if (!pager) {
                if (!pager_program)
                        git_config(git_default_config, NULL);
@@ -52,8 +64,18 @@ void setup_pager(void)
        if (!pager)
                pager = getenv("PAGER");
        if (!pager)
-               pager = "less";
+               pager = DEFAULT_PAGER;
        else if (!*pager || !strcmp(pager, "cat"))
+               pager = NULL;
+
+       return pager;
+}
+
+void setup_pager(void)
+{
+       const char *pager = git_pager();
+
+       if (!pager)
                return;
 
        spawned_pager = 1; /* means we are emitting to terminal */
@@ -62,7 +84,11 @@ void setup_pager(void)
        pager_argv[2] = pager;
        pager_process.argv = pager_argv;
        pager_process.in = -1;
-#ifndef __MINGW32__
+       if (!getenv("LESS")) {
+               static const char *env[] = { "LESS=FRSX", NULL };
+               pager_process.env = env;
+       }
+#ifndef WIN32
        pager_process.preexec_cb = pager_preexec;
 #endif
        if (start_command(&pager_process))
@@ -75,6 +101,7 @@ void setup_pager(void)
        close(pager_process.in);
 
        /* this makes sure that the parent terminates after the pager */
+       sigchain_push_common(wait_for_pager_signal);
        atexit(wait_for_pager);
 }