diff options
Diffstat (limited to 'Documentation/technical/api-run-command.txt')
| -rw-r--r-- | Documentation/technical/api-run-command.txt | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/technical/api-run-command.txt b/Documentation/technical/api-run-command.txt index 5d7d7f2d32..842b8389eb 100644 --- a/Documentation/technical/api-run-command.txt +++ b/Documentation/technical/api-run-command.txt @@ -13,6 +13,10 @@ produces in the caller in order to process it. Functions --------- +`child_process_init` + + Initialize a struct child_process variable. + `start_command`:: Start a sub-process. Takes a pointer to a `struct child_process` @@ -96,8 +100,8 @@ command to run in a sub-process. The caller: -1. allocates and clears (memset(&chld, 0, sizeof(chld));) a - struct child_process variable; +1. allocates and clears (using child_process_init() or + CHILD_PROCESS_INIT) a struct child_process variable; 2. initializes the members; 3. calls start_command(); 4. processes the data; @@ -109,6 +113,13 @@ terminated), of which .argv[0] is the program name to run (usually without a path). If the command to run is a git command, set argv[0] to the command name without the 'git-' prefix and set .git_cmd = 1. +Note that the ownership of the memory pointed to by .argv stays with the +caller, but it should survive until `finish_command` completes. If the +.argv member is NULL, `start_command` will point it at the .args +`argv_array` (so you may use one or the other, but you must use exactly +one). The memory in .args will be cleaned up automatically during +`finish_command` (or during `start_command` when it is unsuccessful). + The members .in, .out, .err are used to redirect stdin, stdout, stderr as follows: |