rpmio/rpmsq.h File Reference

#include <rpmsw.h>

Go to the source code of this file.

Data Structures

struct  rpmsqElem
 SIGCHLD queue element. More...

Typedefs

typedef struct rpmsig_srpmsig
typedef struct rpmsqElemrpmsq
typedef void(* rpmsqAction_t )(int signum, void *info, void *context)
 Default signal handler prototype.

Functions

int rpmsqInsert (void *elem, void *prev)
 Insert node into from queue.
int rpmsqRemove (void *elem)
 Remove node from queue.
void rpmsqAction (int signum, void *info, void *context)
 Default signal handler.
int rpmsqEnable (int signum, rpmsqAction_t handler)
 Enable or disable a signal handler.
pid_t rpmsqFork (rpmsq sq)
 Fork a child process.
pid_t rpmsqWait (rpmsq sq)
 Wait for child process to be reaped.
void * rpmsqThread (void *(*start)(void *arg), void *arg)
 Call a function in a thread.
int rpmsqJoin (void *thread)
 Wait for thread to terminate.
int rpmsqThreadEqual (void *thread)
 Compare thread with current thread.
int rpmsqExecve (const char **argv)
 Execute a command, returning its status.

Variables

int _rpmsq_debug
rpmsq rpmsqQueue
sigset_t rpmsqCaught


Detailed Description

Definition in file rpmsq.h.


Typedef Documentation

typedef struct rpmsig_s* rpmsig

Definition at line 13 of file rpmsq.h.

typedef struct rpmsqElem* rpmsq

Definition at line 17 of file rpmsq.h.

typedef void(* rpmsqAction_t)(int signum, void *info, void *context)

Default signal handler prototype.

Parameters:
signum signal number
info (siginfo_t) signal info
context signal context

Definition at line 25 of file rpmsq.h.


Function Documentation

void rpmsqAction ( int  signum,
void *  info,
void *  context 
)

Default signal handler.

Parameters:
signum signal number
info (siginfo_t) signal info
context signal context

Definition at line 292 of file rpmsq.c.

References rpmsqElem::child, errno, rpmsqElem::mutex, rpmsqElem::q_forw, rpmsqElem::reaped, rpmsigTbl, save, rpmsig_s::signum, and rpmsqElem::status.

Referenced by rpmsqEnable().

int rpmsqEnable ( int  signum,
rpmsqAction_t  handler 
)

Enable or disable a signal handler.

Parameters:
signum signal to enable (or disable if negative)
handler sa_sigaction handler (or NULL to use rpmsqHandler())
Returns:
no. of refs, -1 on error

Definition at line 346 of file rpmsq.c.

References ADD_REF, DO_LOCK, DO_UNLOCK, rpmsqElem::id, ME, rpmsigTbl, rpmsqAction(), rpmsig_s::signum, and SUB_REF.

Referenced by openDatabase(), rpmdbClose(), rpmsqExecve(), rpmsqFork(), rpmsqWaitUnregister(), and sigchld_cancel().

int rpmsqExecve ( const char **  argv  ) 

pid_t rpmsqFork ( rpmsq  sq  ) 

Fork a child process.

Parameters:
sq scriptlet queue element
Returns:
fork(2) pid

Definition at line 401 of file rpmsq.c.

References rpmsqElem::child, ME, rpmsqElem::mutex, rpmsqElem::pipes, rpmsqElem::reaper, rpmsqEnable(), and rpmsqInsert().

Referenced by runScript().

int rpmsqInsert ( void *  elem,
void *  prev 
)

Insert node into from queue.

Parameters:
elem node to link
prev previous node from queue
Returns:
0 on success

Definition at line 199 of file rpmsq.c.

References rpmsqElem::child, rpmsqElem::id, ME, rpmsqElem::mutex, rpmsqElem::pipes, rpmsqElem::reaped, rpmsqElem::reaper, and rpmsqElem::status.

Referenced by rpmsqFork().

int rpmsqJoin ( void *  thread  ) 

Wait for thread to terminate.

Parameters:
thread thread
Returns:
0 on success

Definition at line 592 of file rpmsq.c.

Referenced by fsmNext(), and rpmpsmNext().

int rpmsqRemove ( void *  elem  ) 

Remove node from queue.

Parameters:
elem node to link
Returns:
0 on success

Definition at line 228 of file rpmsq.c.

References rpmsqElem::child, rpmsqElem::id, ME, rpmsqElem::mutex, rpmsqElem::pipes, rpmsqElem::reaped, rpmsqElem::reaper, and rpmsqElem::status.

Referenced by rpmsqWaitUnregister().

void* rpmsqThread ( void *(*)(void *arg)  start,
void *  arg 
)

Call a function in a thread.

Parameters:
start function
arg function argument
Returns:
thread pointer (NULL on error)

Definition at line 583 of file rpmsq.c.

Referenced by fsmNext(), and rpmpsmNext().

int rpmsqThreadEqual ( void *  thread  ) 

Compare thread with current thread.

Parameters:
thread thread
Returns:
0 if not equal

Definition at line 600 of file rpmsq.c.

pid_t rpmsqWait ( rpmsq  sq  ) 

Wait for child process to be reaped.

Parameters:
sq scriptlet queue element
Returns:
reaped child pid

Definition at line 551 of file rpmsq.c.

References rpmsqElem::child, ME, rpmsqElem::reaped, rpmsqElem::reaper, rpmsqWaitUnregister(), and rpmsqElem::status.

Referenced by psmWait().


Variable Documentation

Definition at line 189 of file rpmsq.c.

sigset_t rpmsqCaught

Definition at line 266 of file rpmsq.c.

Referenced by rpmdbCheckSignals(), rpmdbCheckTerminate(), and signalsCaught().

Definition at line 196 of file rpmsq.c.


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