]>
Commit | Line | Data |
---|---|---|
f67b45f8 LT |
1 | #include "cache.h" |
2 | ||
3 | /* | |
bfdd9ffd JS |
4 | * This is split up from the rest of git so that we can do |
5 | * something different on Windows. | |
f67b45f8 LT |
6 | */ |
7 | ||
6e9af863 JK |
8 | static int spawned_pager; |
9 | ||
bfdd9ffd | 10 | #ifndef __MINGW32__ |
402461aa | 11 | static void run_pager(const char *pager) |
f67b45f8 | 12 | { |
35ce8622 LT |
13 | /* |
14 | * Work around bug in "less" by not starting it until we | |
15 | * have real input | |
16 | */ | |
17 | fd_set in; | |
18 | ||
19 | FD_ZERO(&in); | |
20 | FD_SET(0, &in); | |
21 | select(1, &in, NULL, &in, NULL); | |
22 | ||
402461aa | 23 | execlp(pager, pager, NULL); |
34fd1c9a | 24 | execl("/bin/sh", "sh", "-c", pager, NULL); |
f67b45f8 | 25 | } |
bfdd9ffd JS |
26 | #else |
27 | #include "run-command.h" | |
28 | ||
29 | static const char *pager_argv[] = { "sh", "-c", NULL, NULL }; | |
30 | static struct child_process pager_process = { | |
31 | .argv = pager_argv, | |
32 | .in = -1 | |
33 | }; | |
34 | static void wait_for_pager(void) | |
35 | { | |
36 | fflush(stdout); | |
37 | fflush(stderr); | |
38 | /* signal EOF to pager */ | |
39 | close(1); | |
40 | close(2); | |
41 | finish_command(&pager_process); | |
42 | } | |
43 | #endif | |
f67b45f8 LT |
44 | |
45 | void setup_pager(void) | |
46 | { | |
bfdd9ffd | 47 | #ifndef __MINGW32__ |
f67b45f8 LT |
48 | pid_t pid; |
49 | int fd[2]; | |
bfdd9ffd | 50 | #endif |
c27d205a | 51 | const char *pager = getenv("GIT_PAGER"); |
f67b45f8 LT |
52 | |
53 | if (!isatty(1)) | |
54 | return; | |
cad3a205 JH |
55 | if (!pager) { |
56 | if (!pager_program) | |
ef90d6d4 | 57 | git_config(git_default_config, NULL); |
54adf370 | 58 | pager = pager_program; |
cad3a205 | 59 | } |
c27d205a ML |
60 | if (!pager) |
61 | pager = getenv("PAGER"); | |
402461aa JS |
62 | if (!pager) |
63 | pager = "less"; | |
caef71a5 | 64 | else if (!*pager || !strcmp(pager, "cat")) |
402461aa JS |
65 | return; |
66 | ||
6e9af863 | 67 | spawned_pager = 1; /* means we are emitting to terminal */ |
85fb65ed | 68 | |
bfdd9ffd | 69 | #ifndef __MINGW32__ |
f67b45f8 LT |
70 | if (pipe(fd) < 0) |
71 | return; | |
72 | pid = fork(); | |
73 | if (pid < 0) { | |
74 | close(fd[0]); | |
75 | close(fd[1]); | |
76 | return; | |
77 | } | |
78 | ||
79 | /* return in the child */ | |
80 | if (!pid) { | |
81 | dup2(fd[1], 1); | |
61b80509 | 82 | dup2(fd[1], 2); |
f67b45f8 LT |
83 | close(fd[0]); |
84 | close(fd[1]); | |
85 | return; | |
86 | } | |
87 | ||
88 | /* The original process turns into the PAGER */ | |
89 | dup2(fd[0], 0); | |
90 | close(fd[0]); | |
91 | close(fd[1]); | |
92 | ||
0abc0260 | 93 | setenv("LESS", "FRSX", 0); |
402461aa | 94 | run_pager(pager); |
34fd1c9a | 95 | die("unable to execute pager '%s'", pager); |
f67b45f8 | 96 | exit(255); |
bfdd9ffd JS |
97 | #else |
98 | /* spawn the pager */ | |
99 | pager_argv[2] = pager; | |
100 | if (start_command(&pager_process)) | |
101 | return; | |
102 | ||
103 | /* original process continues, but writes to the pipe */ | |
104 | dup2(pager_process.in, 1); | |
105 | dup2(pager_process.in, 2); | |
106 | close(pager_process.in); | |
107 | ||
108 | /* this makes sure that the parent terminates after the pager */ | |
109 | atexit(wait_for_pager); | |
110 | #endif | |
f67b45f8 | 111 | } |
6e9af863 JK |
112 | |
113 | int pager_in_use(void) | |
114 | { | |
115 | const char *env; | |
116 | ||
117 | if (spawned_pager) | |
118 | return 1; | |
119 | ||
120 | env = getenv("GIT_PAGER_IN_USE"); | |
121 | return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0; | |
122 | } |