process.h File Reference

Process, System-V, and POSIX libraries wrapper module. More...

#include <stdio.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <semaphore.h>
#include <signal.h>

Go to the source code of this file.

Functions
Process handling
pid_t	pfork (void)
	fork wrapper function. More...
pid_t	pwait (int *status)
	wait wrapper function. More...
pid_t	pwaitpid (pid_t pid, int *status, int options)
	waitpid wrapper function. More...
void	pkill (pid_t pid, int sig)
	kill wrapper function. More...
void	pexecl (const char *pathname, const char *arg,...)
	execl wrapper function. More...
void	psigaction (int signum, const struct sigaction *act, struct sigaction *oldact)
	sigaction wrapper function. More...
System V - shared memory
Example #include <process.h> // #include <sys/shm.h> ... int shmid; // creation: shmid = pshmget(key, size, 0600 | IPC_CREAT | IPC_EXCL); // or, use existing: shmid = pshmget(key, 0, 0); ... // attach shm to pointer address: void* p = pshmat(shmid, NULL, 0); ... // detach shm from pointer address: pshmdt(p); ... // destroy shm: pshmctl(shmid, IPC_RMID, NULL);
int	pshmget (key_t key, size_t size, int shmflg)
	shmget wrapper function. More...
int	pshmctl (int shmid, int cmd, struct shmid_ds *buf)
	shmctl wrapper function. More...
void *	pshmat (int shmid, const void *shmaddr, int shmflg)
	shmat wrapper function. More...
void	pshmdt (const void *shmaddr)
	shmdt wrapper function. More...
System V - semaphores
Example #include <process.h> // #include <sys/sem.h> ... int semid; // creation: semid = psemget(key, 1, 0600 | IPC_CREAT | IPC_EXCL); // 1 semaphore! // or, use existing: semid = psemget(key, 0, 0); ... // decrement: struct sembuf down = {0, -1, 0}; psemop(semid, &down, 1); // or, simply use provided function: psem_down(semid, 0); // NOTE: there is no sem_down in default library! ... // increment: struct sembuf up = {0, 1, 0}; psemop(semid, &up, 1); // or, simply use provided function: psem_up(semid, 0); // NOTE: there is no sem_up in default library! ... // destroy sem 0: psemctl(semid, 0, IPC_RMID, NULL);
int	psemget (key_t key, int nsems, int semflg)
	semget wrapper function. More...
int	psemctl (int semid, int semnum, int cmd)
	semctl wrapper function. More...
int	psemctl (int semid, int semnum, int cmd, void *u)
void	psemop (int semid, struct sembuf *sops, size_t nsops)
	semop wrapper function. More...
void	psem_up (int semid, short unsigned int index)
	Increment a semaphore (uses psemop()).
void	psem_down (int semid, short unsigned int index)
	Decrements a semaphore (uses psemop()).
void	psem_down2 (int semid, short unsigned int index1, unsigned int index2)
	Decrements atomically two semaphores in a System V semaphore array (uses psemop()).
System V - message queues
Example #include <process.h> // #include <sys/msg.h> ... typedef struct Item { ... } Item; typedef struct Message { long type; Item item; } Message; ... int msgid; // creation: msgid = pmsgget(key, 0600 | IPC_CREAT | IPC_EXCL); // or, use existing: msgid = pmsgget(key, 0); ... Message msg; // send msg: msg = ...; pmsgsnd(msgid, &msg, sizeof(Item), 0); ... // receive msg: pmsgrcv(msgid, &msg, sizeof(Item), type, 0); ... // destroy msg: pmsgctl(msgid, IPC_RMID, NULL);
int	pmsgget (key_t key, int msgflg)
	msgget wrapper function. More...
int	pmsgctl (int msqid, int cmd, struct msqid_ds *buf)
	msgctl wrapper function. More...
void	pmsgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
	msgsnd wrapper function. More...
size_t	pmsgrcv (int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
	msgrcv wrapper function. More...
POSIX semaphores
sem_t *	psem_open (const char *name, int oflag)
	sem_open wrapper function. More...
sem_t *	psem_open (const char *name, int oflag, mode_t mode, unsigned int value)
void	psem_close (sem_t *sem)
	sem_close wrapper function. More...
void	psem_unlink (const char *name)
	sem_unlink wrapper function. More...
void	psem_init (sem_t *sem, int pshared, unsigned int value)
	sem_init wrapper function. More...
void	psem_destroy (sem_t *sem)
	sem_destroy wrapper function. More...
void	psem_wait (sem_t *sem)
	sem_wait wrapper function. More...
int	psem_trywait (sem_t *sem)
	sem_trywait wrapper function. More...
int	psem_timedwait (sem_t *sem, const struct timespec *abs_timeout)
	sem_timedwait wrapper function. More...
void	psem_post (sem_t *sem)
	sem_post wrapper function. More...
UNIX pipes
void	ppipe (int pipefd[2])
	pipe wrapper function. More...
FILE *	ppopen (const char *command, const char *type)
	popen wrapper function. More...
void	ppclose (FILE *stream)
	pclose wrapper function. More...

Detailed Description

Process, System-V, and POSIX libraries wrapper module.

Remarks

Removes defensive programming from native libraries