96a035d1db
Recent change to paginate "git diff" by default is often irritating when you do not have any change (or very small change) in your working tree. Signed-off-by: Junio C Hamano <junkio@cox.net>
58 lines
973 B
C
58 lines
973 B
C
#include "cache.h"
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/*
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* This is split up from the rest of git so that we might do
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* something different on Windows, for example.
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*/
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static void run_pager(const char *pager)
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{
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execlp(pager, pager, NULL);
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execl("/bin/sh", "sh", "-c", pager, NULL);
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}
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void setup_pager(void)
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{
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pid_t pid;
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int fd[2];
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const char *pager = getenv("GIT_PAGER");
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if (!isatty(1))
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return;
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if (!pager)
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pager = getenv("PAGER");
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if (!pager)
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pager = "less";
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else if (!*pager || !strcmp(pager, "cat"))
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return;
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pager_in_use = 1; /* means we are emitting to terminal */
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if (pipe(fd) < 0)
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return;
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pid = fork();
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if (pid < 0) {
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* return in the child */
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if (!pid) {
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dup2(fd[1], 1);
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* The original process turns into the PAGER */
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dup2(fd[0], 0);
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close(fd[0]);
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close(fd[1]);
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setenv("LESS", "FRS", 0);
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run_pager(pager);
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die("unable to execute pager '%s'", pager);
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exit(255);
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}
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