#include <fcntl.h>
#include "wvfork.h"
#include "wvlinklist.h"
Go to the source code of this file.
Defines | |
#define | MAX_FD sysconf(_SC_OPEN_MAX) + 1 |
Functions | |
DeclareWvList (WvForkCallback) | |
void | add_wvfork_callback (WvForkCallback cb) |
Register a callback to be called during wvfork. | |
pid_t | wvfork (int dontclose1, int dontclose2) |
wvfork() just runs fork(), but it closes all file descriptors that are flagged close-on-exec, since we don't necessarily always run exec() after we fork()... | |
pid_t | wvfork_start (int *waitfd) |
wvfork_start is just like fork, except that it will block the parent until the child process closes the waitfd, to avoid race conditions. | |
pid_t | wvfork (intTable &dontclose) |
Variables | |
WvForkCallbackList | callbacks |
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Definition at line 26 of file wvfork.cc. Referenced by wvfork(). |
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Register a callback to be called during wvfork. It will be called (in both parent and child process) after the fork has happened but before wvfork returns. It is passed the return value of the fork. NOTE: There is no way to undo this operation! Definition at line 32 of file wvfork.cc. References callbacks, and WvForkCallback. Referenced by WvIStreamList::WvIStreamList(). |
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Definition at line 99 of file wvfork.cc. References MAX_FD, and wvfork_start(). Referenced by WvResolver::findaddr(), and wvfork(). |
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wvfork() just runs fork(), but it closes all file descriptors that are flagged close-on-exec, since we don't necessarily always run exec() after we fork()... This fixes the year-old mystery bug where WvTapeBackup caused watchdog reboots because the CHILD process wasn't touching it, and it was already open before the fork()... Definition at line 52 of file wvfork.cc. References wvfork(). |
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wvfork_start is just like fork, except that it will block the parent until the child process closes the waitfd, to avoid race conditions. For example, wvfork uses it, closing the waitfd only when it is done closing the close-on-exec file descriptors. Definition at line 62 of file wvfork.cc. References callbacks. Referenced by WvSubProc::fork(), and wvfork(). |
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Definition at line 29 of file wvfork.cc. Referenced by add_wvfork_callback(), and wvfork_start(). |