#include "system.h"
#include <signal.h>
#include <sys/signal.h>
#include <sys/wait.h>
#include <search.h>
#include <rpmsq.h>
#include "debug.h"

Include dependency graph for rpmsq.c:

Data Structures
struct	rpmsig_s
Defines
#define	DO_LOCK() (0)
#define	DO_UNLOCK() (0)
#define	INIT_LOCK()
#define	ADD_REF(__tbl) /@-noeffect@/ (0)
#define	SUB_REF(__tbl) /@-noeffect@/ (0)
#define	CLEANUP_HANDLER(__handler, __arg, __oldtypeptr)
#define	CLEANUP_RESET(__execute, __oldtype)
#define	SAME_THREAD(_a, _b) (42)
#define	ME() __pid2vp(getpid())
#define	_RPMSQ_INTERNAL
#define	_RPMSQ_DEBUG 0
#define	rpmsigTbl_sigint (&rpmsigTbl[0])
#define	rpmsigTbl_sigquit (&rpmsigTbl[1])
#define	rpmsigTbl_sigchld (&rpmsigTbl[2])
#define	rpmsigTbl_sighup (&rpmsigTbl[3])
#define	rpmsigTbl_sigterm (&rpmsigTbl[4])
#define	rpmsigTbl_sigpipe (&rpmsigTbl[5])
Functions
static void *	__pid2vp (pid_t pid)
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.
static int	rpmsqWaitUnregister (rpmsq sq)
	Wait for child process to be reaped, and unregister SIGCHLD handler.
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)
	SIGCHLD cancellation handler.
Variables
int	_rpmsq_debug = 0
static struct rpmsqElem	rpmsqRock = { .q_forw = &rpmsqRock }
rpmsq	rpmsqQueue = &rpmsqRock
sigset_t	rpmsqCaught
static struct rpmsig_s	rpmsigTbl []

Detailed Description

Definition in file rpmsq.c.

Define Documentation

#define _RPMSQ_DEBUG 0

Definition at line 276 of file rpmsq.c.

#define _RPMSQ_INTERNAL

Definition at line 271 of file rpmsq.c.

#define ADD_REF ( __tbl ) /*@-noeffect@*/ (0)

Definition at line 251 of file rpmsq.c.

Referenced by rpmsqEnable(), and rpmsqExecve().

#define CLEANUP_HANDLER	(	__handler,
		__arg,
		__oldtypeptr
	)

Definition at line 253 of file rpmsq.c.

Referenced by rpmsqExecve().

#define CLEANUP_RESET	(	__execute,
		__oldtype
	)

Definition at line 254 of file rpmsq.c.

Referenced by rpmsqExecve().

#define DO_LOCK ( ) (0)

Definition at line 248 of file rpmsq.c.

Referenced by rpmsqEnable(), and rpmsqExecve().

#define DO_UNLOCK ( ) (0)

Definition at line 249 of file rpmsq.c.

Referenced by rpmsqEnable(), and rpmsqExecve().

#define INIT_LOCK ( )

Definition at line 250 of file rpmsq.c.

Referenced by rpmsqExecve().

#define ME ( ) __pid2vp(getpid())

Definition at line 259 of file rpmsq.c.

Referenced by rpmsqEnable(), rpmsqFork(), rpmsqInsert(), rpmsqRemove(), rpmsqWait(), and rpmsqWaitUnregister().

#define rpmsigTbl_sigchld (&rpmsigTbl[2])

Referenced by rpmsqExecve().

#define rpmsigTbl_sighup (&rpmsigTbl[3])

#define rpmsigTbl_sigint (&rpmsigTbl[0])

Referenced by rpmsqExecve().

#define rpmsigTbl_sigpipe (&rpmsigTbl[5])

#define rpmsigTbl_sigquit (&rpmsigTbl[1])

Referenced by rpmsqExecve().

#define rpmsigTbl_sigterm (&rpmsigTbl[4])

#define SAME_THREAD	(	_a,
		_b
	)	(42)

Definition at line 256 of file rpmsq.c.

#define SUB_REF ( __tbl ) /*@-noeffect@*/ (0)

Definition at line 252 of file rpmsq.c.

Referenced by rpmsqEnable(), and rpmsqExecve().

Function Documentation

static void* __pid2vp ( pid_t pid ) [static]

Definition at line 261 of file rpmsq.c.

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 390 of file rpmsq.c.

References errno, rpmsigTbl, and rpmsig_s::signum.

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 439 of file rpmsq.c.

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

Referenced by rpmdbClose(), rpmdbOpenDatabase(), rpmsqExecve(), rpmsqFork(), and rpmsqWaitUnregister().

int rpmsqExecve ( const char ** argv )

SIGCHLD cancellation handler.

Execute a command, returning its status.

Definition at line 728 of file rpmsq.c.

References ADD_REF, alloca(), CLEANUP_HANDLER, CLEANUP_RESET, DO_LOCK, DO_UNLOCK, environ, errno, INIT_LOCK, rpmsigTbl_sigchld, rpmsigTbl_sigint, rpmsigTbl_sigquit, rpmsqEnable(), and SUB_REF.

pid_t rpmsqFork ( rpmsq sq )

Fork a child process.

Parameters:

sq	scriptlet queue element

Returns:: fork(2) pid

Definition at line 495 of file rpmsq.c.

References ME, 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 291 of file rpmsq.c.

References ME.

Referenced by rpmsqFork().

int rpmsqJoin ( void * thread )

Wait for thread to terminate.

Parameters:

thread thread

Returns:: 0 on success

Definition at line 671 of file rpmsq.c.

Referenced by fsmNext(), iosmNext(), and rpmpsmNext().

int rpmsqRemove ( void * elem )

Remove node from queue.

Parameters:

elem	node to link

Returns:: 0 on success

Definition at line 320 of file rpmsq.c.

References ME.

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 656 of file rpmsq.c.

Referenced by fsmNext(), iosmNext(), and rpmpsmNext().

int rpmsqThreadEqual ( void * thread )

Compare thread with current thread.

Parameters:

thread thread

Returns:: 0 if not equal

Definition at line 684 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 624 of file rpmsq.c.

References ME, and rpmsqWaitUnregister().

Referenced by psmWait().

static int rpmsqWaitUnregister ( rpmsq sq ) [static]

Wait for child process to be reaped, and unregister SIGCHLD handler.

Todo:: Rewrite to use waitpid on helper thread.

Parameters:

sq	scriptlet queue element

Returns:: 0 on success

Definition at line 557 of file rpmsq.c.

References ME, rpmsqEnable(), rpmsqRemove(), rpmswEnter(), and rpmswExit().

Referenced by rpmsqWait().

Variable Documentation

int _rpmsq_debug = 0

Definition at line 278 of file rpmsq.c.

struct rpmsig_s rpmsigTbl[] [static]

Referenced by rpmsqAction(), and rpmsqEnable().

sigset_t rpmsqCaught

Definition at line 352 of file rpmsq.c.

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

rpmsq rpmsqQueue = &rpmsqRock

Definition at line 288 of file rpmsq.c.

struct rpmsqElem rpmsqRock = { .q_forw = &rpmsqRock } [static]

Definition at line 283 of file rpmsq.c.

rpmio/rpmsq.c File ReferenceRPMIO.

Data Structures

Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation

rpmio/rpmsq.c File Reference
RPMIO.