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Update documentation for tor_spawn_background

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- Include description of stdout_read, stderr_read, and argv
This commit is contained in:
Steven Murdoch 2010-10-09 17:25:30 +01:00
parent 8ee559bd63
commit 68e576e9f9
1 changed files with 12 additions and 5 deletions
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17
src/common/util.c
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@ -2960,11 +2960,18 @@ format_helper_exit_status(unsigned char child_state, int saved_errno,
#define SPAWN_ERROR_MESSAGE "ERR: Failed to spawn background process - code "
/** Start a program in the background. If <b>filename</b> contains a '/', then
* it will be treated as an absolute or relative path. Otherwise the system
* path will be searched for <b>filename</b>. Returns pid on success, otherwise
* returns -1.
* Some parts of this code are based on the POSIX subprocess module from Python
/** Start a program in the background. If <b>filename</b> contains a '/',
* then it will be treated as an absolute or relative path. Otherwise the
* system path will be searched for <b>filename</b>. The strings in
* <b>argv</b> will be passed as the command line arguments of the child
* program (following convention, argv[0] should normally be the filename of
* the executable). The last element of argv must be NULL. If the child
* program is launched, the PID will be returned and <b>stdout_read</b> and
* <b>stdout_err</b> will be set to file descriptors from which the stdout
* and stderr, respectively, output of the child program can be read, and the
* stdin of the child process shall be set to /dev/null. Otherwise returns
* -1. Some parts of this code are based on the POSIX subprocess module from
* Python.
*/
static int
tor_spawn_background(const char *const filename, int *stdout_read,