2 #include "run-command.h"
6 * This is split up from the rest of git so that we can do
7 * something different on Windows.
10 static int spawned_pager
;
13 static void pager_preexec(void)
16 * Work around bug in "less" by not starting it until we
23 select(1, &in
, NULL
, &in
, NULL
);
27 static const char *pager_argv
[] = { "sh", "-c", NULL
, NULL
};
28 static struct child_process pager_process
;
30 static void wait_for_pager(void)
34 /* signal EOF to pager */
37 finish_command(&pager_process
);
40 static void wait_for_pager_signal(int signo
)
47 const char *git_pager(void)
54 pager
= getenv("GIT_PAGER");
57 git_config(git_default_config
, NULL
);
58 pager
= pager_program
;
61 pager
= getenv("PAGER");
64 else if (!*pager
|| !strcmp(pager
, "cat"))
70 void setup_pager(void)
72 const char *pager
= git_pager();
77 spawned_pager
= 1; /* means we are emitting to terminal */
80 pager_argv
[2] = pager
;
81 pager_process
.argv
= pager_argv
;
82 pager_process
.in
= -1;
83 if (!getenv("LESS")) {
84 static const char *env
[] = { "LESS=FRSX", NULL
};
85 pager_process
.env
= env
;
88 pager_process
.preexec_cb
= pager_preexec
;
90 if (start_command(&pager_process
))
93 /* original process continues, but writes to the pipe */
94 dup2(pager_process
.in
, 1);
96 dup2(pager_process
.in
, 2);
97 close(pager_process
.in
);
99 /* this makes sure that the parent terminates after the pager */
100 sigchain_push_common(wait_for_pager_signal
);
101 atexit(wait_for_pager
);
104 int pager_in_use(void)
111 env
= getenv("GIT_PAGER_IN_USE");
112 return env
? git_config_bool("GIT_PAGER_IN_USE", env
) : 0;