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v0.5.2
https://github.com/git/git
23 January 2022, 05:21:09 UTC
Revision 141d21b8256ef96bbd693fd35e154787365e26dc authored by Junio C Hamano on 12 January 2007, 00:48:28 UTC, committed by Junio C Hamano on 12 January 2007, 00:48:28 UTC 
Merge branch 'ar/merge-recursive'
 
* ar/merge-recursive:
  merge-recursive: do not use on-file index when not needed.
  Speed-up recursive by flushing index only once for all entries
2 parent s c388761 + 8b944b5
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Tip revision: 141d21b8256ef96bbd693fd35e154787365e26dc authored by Junio C Hamano on 12 January 2007, 00:48:28 UTC
Merge branch 'ar/merge-recursive'
Tip revision: 141d21b
pager.c 
#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(const char *pager)
{
	execlp(pager, pager, NULL);
	execl("/bin/sh", "sh", "-c", pager, NULL);
}

void setup_pager(void)
{
	pid_t pid;
	int fd[2];
	const char *pager = getenv("GIT_PAGER");

	if (!isatty(1))
		return;
	if (!pager)
		pager = getenv("PAGER");
	if (!pager)
		pager = "less";
	else if (!*pager || !strcmp(pager, "cat"))
		return;

	pager_in_use = 1; /* means we are emitting to terminal */

	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]);

	setenv("LESS", "FRSX", 0);
	run_pager(pager);
	die("unable to execute pager '%s'", pager);
	exit(255);
}
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