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0a453a237e
Conflicts: Makefile builtin-config.c cache.h config.c git-gui/git-gui.sh lockfile.c path.c setup.c t/t9200-git-cvsexportcommit.sh Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
#include "cache.h"
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#include "spawn-pipe.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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#ifndef __MINGW32__
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static void run_pager(const char *pager)
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{
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/*
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* Work around bug in "less" by not starting it until we
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* have real input
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*/
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fd_set in;
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FD_ZERO(&in);
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FD_SET(0, &in);
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select(1, &in, NULL, &in, NULL);
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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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#else
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static pid_t pager_pid;
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static void collect_pager(void)
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{
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fflush(stdout);
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close(1); /* signals EOF to pager */
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cwait(NULL, pager_pid, 0);
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}
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#endif
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void setup_pager(void)
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{
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#ifndef __MINGW32__
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pid_t pid;
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#else
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const char *pager_argv[] = { "sh", "-c", NULL, NULL };
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#endif
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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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if (!pager_program)
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git_config(git_default_config);
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pager = pager_program;
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}
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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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#ifndef __MINGW32__
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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", "FRSX", 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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#else
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/* spawn the pager */
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pager_argv[2] = pager;
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pager_pid = spawnvpe_pipe(pager_argv[0], pager_argv, environ, fd, NULL);
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if (pager_pid < 0)
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return;
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/* original process continues, but writes to the pipe */
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dup2(fd[1], 1);
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close(fd[1]);
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/* this makes sure that the parent terminates after the pager */
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atexit(collect_pager);
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#endif
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}
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