X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=pager.c;fp=pager.c;h=1364e15d23527c0c4a11bcbe18c80c32af6d94b4;hb=f67b45f862d17b54037b9b59eefc385624d1fa83;hp=0000000000000000000000000000000000000000;hpb=a4a88b2bab3b6fb0b30f63418701f42388e0fe0a;p=git.git

diff --git a/pager.c b/pager.c
new file mode 100644
index 00000000..1364e15d
--- /dev/null
+++ b/pager.c
@@ -0,0 +1,48 @@
+#include "cache.h"
+
+/*
+ * This is split up from the rest of git so that we might do
+ * something different on Windows, for example.
+ */
+
+static void run_pager(void)
+{
+	const char *prog = getenv("PAGER");
+	if (!prog)
+		prog = "less";
+	setenv("LESS", "-S", 0);
+	execlp(prog, prog, NULL);
+}
+
+void setup_pager(void)
+{
+	pid_t pid;
+	int fd[2];
+
+	if (!isatty(1))
+		return;
+	if (pipe(fd) < 0)
+		return;
+	pid = fork();
+	if (pid < 0) {
+		close(fd[0]);
+		close(fd[1]);
+		return;
+	}
+
+	/* return in the child */
+	if (!pid) {
+		dup2(fd[1], 1);
+		close(fd[0]);
+		close(fd[1]);
+		return;
+	}
+
+	/* The original process turns into the PAGER */
+	dup2(fd[0], 0);
+	close(fd[0]);
+	close(fd[1]);
+
+	run_pager();
+	exit(255);
+}