#include <unistd.h>
#include "wvscatterhash.h"
#include "wvcallback.h"
Include dependency graph for wvfork.h:
Go to the source code of this file.
Typedefs | |
typedef WvCallback< void, pid_t > | WvForkCallback |
Functions | |
DeclareWvScatterTable (int) | |
void | add_wvfork_callback (WvForkCallback cb) |
Register a callback to be called during wvfork. | |
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 (int dontclose1=-1, int dontclose2=-1) |
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 (intTable &dontclose) |
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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! |
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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. |
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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()... |