projects / thirdparty / git.git / blame
| Commit | Line | Data |
|---|---|---|
| f67b45f8 LT |
1 | #include "cache.h" |
| 2 | ||
| 3 | /* | |
| 4 | * This is split up from the rest of git so that we might do | |
| 5 | * something different on Windows, for example. | |
| 6 | */ | |
| 7 | ||
| 402461aa | 8 | static void run_pager(const char *pager) |
| f67b45f8 | 9 | { |
| 402461aa | 10 | execlp(pager, pager, NULL); |
| 34fd1c9a | 11 | execl("/bin/sh", "sh", "-c", pager, NULL); |
| f67b45f8 LT |
12 | } |
| 13 | ||
| 14 | void setup_pager(void) | |
| 15 | { | |
| 16 | pid_t pid; | |
| 17 | int fd[2]; | |
| c27d205a | 18 | const char *pager = getenv("GIT_PAGER"); |
| f67b45f8 LT |
19 | |
| 20 | if (!isatty(1)) | |
| 21 | return; | |
| c27d205a ML |
22 | if (!pager) |
| 23 | pager = getenv("PAGER"); | |
| 402461aa JS |
24 | if (!pager) |
| 25 | pager = "less"; | |
| caef71a5 | 26 | else if (!*pager || !strcmp(pager, "cat")) |
| 402461aa JS |
27 | return; |
| 28 | ||
| 85fb65ed JH |
29 | pager_in_use = 1; /* means we are emitting to terminal */ |
| 30 | ||
| f67b45f8 LT |
31 | if (pipe(fd) < 0) |
| 32 | return; | |
| 33 | pid = fork(); | |
| 34 | if (pid < 0) { | |
| 35 | close(fd[0]); | |
| 36 | close(fd[1]); | |
| 37 | return; | |
| 38 | } | |
| 39 | ||
| 40 | /* return in the child */ | |
| 41 | if (!pid) { | |
| 42 | dup2(fd[1], 1); | |
| 43 | close(fd[0]); | |
| 44 | close(fd[1]); | |
| 45 | return; | |
| 46 | } | |
| 47 | ||
| 48 | /* The original process turns into the PAGER */ | |
| 49 | dup2(fd[0], 0); | |
| 50 | close(fd[0]); | |
| 51 | close(fd[1]); | |
| 52 | ||
| 0abc0260 | 53 | setenv("LESS", "FRSX", 0); |
| 402461aa | 54 | run_pager(pager); |
| 34fd1c9a | 55 | die("unable to execute pager '%s'", pager); |
| f67b45f8 LT |
56 | exit(255); |
| 57 | } |