Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3/*
   4 * This is split up from the rest of git so that we might do
   5 * something different on Windows, for example.
   6 */
   7
   8static void run_pager(const char *pager)
   9{
  10        execlp(pager, pager, NULL);
  11}
  12
  13void setup_pager(void)
  14{
  15        pid_t pid;
  16        int fd[2];
  17        const char *pager = getenv("PAGER");
  18
  19        if (!isatty(1))
  20                return;
  21        if (!pager)
  22                pager = "less";
  23        else if (!*pager || !strcmp(pager, "cat"))
  24                return;
  25
  26        if (pipe(fd) < 0)
  27                return;
  28        pid = fork();
  29        if (pid < 0) {
  30                close(fd[0]);
  31                close(fd[1]);
  32                return;
  33        }
  34
  35        /* return in the child */
  36        if (!pid) {
  37                dup2(fd[1], 1);
  38                close(fd[0]);
  39                close(fd[1]);
  40                return;
  41        }
  42
  43        /* The original process turns into the PAGER */
  44        dup2(fd[0], 0);
  45        close(fd[0]);
  46        close(fd[1]);
  47
  48        setenv("LESS", "-S", 0);
  49        run_pager(pager);
  50        exit(255);
  51}