diff options
Diffstat (limited to 'pager.c')
| -rw-r--r-- | pager.c | 50 |
1 files changed, 45 insertions, 5 deletions
@@ -14,6 +14,7 @@ int pager_use_color = 1; static struct child_process pager_process; static char *pager_program; +static int old_fd1 = -1, old_fd2 = -1; /* Is the value coming back from term_columns() just a guess? */ static int term_columns_guessed; @@ -23,10 +24,11 @@ static void close_pager_fds(void) { /* signal EOF to pager */ close(1); - close(2); + if (old_fd2 != -1) + close(2); } -static void wait_for_pager_atexit(void) +static void finish_pager(void) { fflush(stdout); fflush(stderr); @@ -34,8 +36,37 @@ static void wait_for_pager_atexit(void) finish_command(&pager_process); } +static void wait_for_pager_atexit(void) +{ + if (old_fd1 == -1) + return; + + finish_pager(); +} + +void wait_for_pager(void) +{ + if (old_fd1 == -1) + return; + + finish_pager(); + sigchain_pop_common(); + unsetenv("GIT_PAGER_IN_USE"); + dup2(old_fd1, 1); + close(old_fd1); + old_fd1 = -1; + if (old_fd2 != -1) { + dup2(old_fd2, 2); + close(old_fd2); + old_fd2 = -1; + } +} + static void wait_for_pager_signal(int signo) { + if (old_fd1 == -1) + return; + close_pager_fds(); finish_command_in_signal(&pager_process); sigchain_pop(signo); @@ -111,6 +142,7 @@ void prepare_pager_args(struct child_process *pager_process, const char *pager) void setup_pager(void) { + static int once = 0; const char *pager = git_pager(isatty(1)); if (!pager) @@ -140,14 +172,20 @@ void setup_pager(void) die("unable to execute pager '%s'", pager); /* original process continues, but writes to the pipe */ + old_fd1 = dup(1); dup2(pager_process.in, 1); - if (isatty(2)) + if (isatty(2)) { + old_fd2 = dup(2); dup2(pager_process.in, 2); + } close(pager_process.in); - /* this makes sure that the parent terminates after the pager */ sigchain_push_common(wait_for_pager_signal); - atexit(wait_for_pager_atexit); + + if (!once) { + once++; + atexit(wait_for_pager_atexit); + } } int pager_in_use(void) @@ -196,6 +234,8 @@ int term_columns(void) */ void term_clear_line(void) { + if (!isatty(2)) + return; if (is_terminal_dumb()) /* * Fall back to print a terminal width worth of space |