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git/pager.c
Junio C Hamano caef71a535 Do not fork PAGER=cat
Unless the user has a nonstandard "cat" command that does not
meow like a cat, this should not break anything and would save an
extra pipe.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-16 01:46:08 -07:00

51 lines
779 B
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);
}
void setup_pager(void)
{
pid_t pid;
int fd[2];
const char *pager = getenv("PAGER");
if (!isatty(1))
return;
if (!pager)
pager = "less";
else if (!*pager || !strcmp(pager, "cat"))
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]);
setenv("LESS", "-S", 0);
run_pager(pager);
exit(255);
}