outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

getpeername()函數(shù) Unix/Linux

1. getpeername()函數(shù) Unix/Linux

io_setup()函數(shù) Unix/Linux

1. io_setup()函數(shù) Unix/Linux

mknod()函數(shù) Unix/Linux

1. mknod()函數(shù) Unix/Linux

arch_prctl()函數(shù) Unix/Linux

1. arch_prctl()函數(shù) Unix/Linux

inotify_add_watch()函數(shù) Unix/Linux

1. inotify_add_watch()函數(shù) Unix/Linux

chmod()函數(shù) Unix/Linux

1. chmod()函數(shù) Unix/Linux

_exit()函數(shù) Unix/Linux

1. _exit()函數(shù) Unix/Linux

epoll_ctl()函數(shù) Unix/Linux

1. epoll_ctl()函數(shù) Unix/Linux

Unix/Linux系統(tǒng)調(diào)用

1. Unix/Linux系統(tǒng)調(diào)用

futimesat()函數(shù) Unix/Linux

1. futimesat()函數(shù) Unix/Linux

oldolduname()函數(shù) Unix/Linux

1. oldolduname()函數(shù) Unix/Linux

sched_rr_get_interval()函數(shù) Unix/Linux

1. sched_rr_get_interval()函數(shù) Unix/Linux

oldstat()函數(shù) Unix/Linux

1. oldstat()函數(shù) Unix/Linux

pselect()函數(shù) Unix/Linux

1. pselect()函數(shù) Unix/Linux

close()函數(shù) Unix/Linux

1. close()函數(shù) Unix/Linux

add_key()函數(shù) Unix/Linux

1. add_key()函數(shù) Unix/Linux

clone()函數(shù) Unix/Linux

1. clone()函數(shù) Unix/Linux

rename()函數(shù) Unix/Linux

1. rename()函數(shù) Unix/Linux

msgop()函數(shù) Unix/Linux

1. msgop()函數(shù) Unix/Linux

getrlimit()函數(shù) Unix/Linux

1. getrlimit()函數(shù) Unix/Linux

linkat()函數(shù) Unix/Linux

1. linkat()函數(shù) Unix/Linux

ioprio_set()函數(shù) Unix/Linux

1. ioprio_set()函數(shù) Unix/Linux

insw()函數(shù) Unix/Linux

1. insw()函數(shù) Unix/Linux

munlock()函數(shù) Unix/Linux

1. munlock()函數(shù) Unix/Linux

getgid()函數(shù) Unix/Linux

1. getgid()函數(shù) Unix/Linux

chdir()函數(shù) Unix/Linux

1. chdir()函數(shù) Unix/Linux

rmdir()函數(shù) Unix/Linux

1. rmdir()函數(shù) Unix/Linux

ioctl()函數(shù) Unix/Linux

1. ioctl()函數(shù) Unix/Linux

lchown()函數(shù) Unix/Linux

1. lchown()函數(shù) Unix/Linux

execve()函數(shù) Unix/Linux

1. execve()函數(shù) Unix/Linux

epoll_wait()函數(shù) Unix/Linux

1. epoll_wait()函數(shù) Unix/Linux

fstatat()函數(shù) Unix/Linux

1. fstatat()函數(shù) Unix/Linux

truncate()函數(shù) Unix/Linux

1. truncate()函數(shù) Unix/Linux

lock()函數(shù) Unix/Linux

1. lock()函數(shù) Unix/Linux

outsb()函數(shù) Unix/Linux

1. outsb()函數(shù) Unix/Linux

chroot()函數(shù) Unix/Linux

1. chroot()函數(shù) Unix/Linux

kexec_load()函數(shù) Unix/Linux

1. kexec_load()函數(shù) Unix/Linux

afs_syscall()函數(shù) Unix/Linux

1. afs_syscall()函數(shù) Unix/Linux

dup2()函數(shù) Unix/Linux

1. dup2()函數(shù) Unix/Linux

_newselect()函數(shù) Unix/Linux

1. _newselect()函數(shù) Unix/Linux

inotify_rm_watch()函數(shù) Unix/Linux

1. inotify_rm_watch()函數(shù) Unix/Linux

recv()函數(shù) Unix/Linux

1. recv()函數(shù) Unix/Linux

msgsnd()函數(shù) Unix/Linux

1. msgsnd()函數(shù) Unix/Linux

getdtablesize()函數(shù) Unix/Linux

1. getdtablesize()函數(shù) Unix/Linux

ioperm()函數(shù) Unix/Linux

1. ioperm()函數(shù) Unix/Linux

munmap()函數(shù) Unix/Linux

1. munmap()函數(shù) Unix/Linux

getpriority()函數(shù) Unix/Linux

1. getpriority()函數(shù) Unix/Linux

sched_get_priority_min()函數(shù) Unix/Linux

1. sched_get_priority_min()函數(shù) Unix/Linux

outw_p()函數(shù) Unix/Linux

1. outw_p()函數(shù) Unix/Linux

kill()函數(shù) Unix/Linux

1. kill()函數(shù) Unix/Linux

lookup_dcookie()函數(shù) Unix/Linux

1. lookup_dcookie()函數(shù) Unix/Linux

accept()函數(shù) Unix/Linux

1. accept()函數(shù) Unix/Linux

obsolete()函數(shù) Unix/Linux

1. obsolete()函數(shù) Unix/Linux

pread()函數(shù) Unix/Linux

1. pread()函數(shù) Unix/Linux

getgroups()函數(shù) Unix/Linux

1. getgroups()函數(shù) Unix/Linux

personality()函數(shù) Unix/Linux

1. personality()函數(shù) Unix/Linux

recvfrom()函數(shù) Unix/Linux

1. recvfrom()函數(shù) Unix/Linux

putpmsg()函數(shù) Unix/Linux

1. putpmsg()函數(shù) Unix/Linux

getgroups()函數(shù) Unix/Linux

1. getgroups()函數(shù) Unix/Linux

remap_file_pages()函數(shù) Unix/Linux

1. remap_file_pages()函數(shù) Unix/Linux

request_key()函數(shù) Unix/Linux

1. request_key()函數(shù) Unix/Linux

mount()函數(shù) Unix/Linux

1. mount()函數(shù) Unix/Linux

sched_setscheduler()函數(shù) Unix/Linux

1. sched_setscheduler()函數(shù) Unix/Linux

mkdirat()函數(shù) Unix/Linux

1. mkdirat()函數(shù) Unix/Linux

nfsservctl()函數(shù) Unix/Linux

1. nfsservctl()函數(shù) Unix/Linux

getuid()函數(shù) Unix/Linux

1. getuid()函數(shù) Unix/Linux

prof()函數(shù) Unix/Linux

1. prof()函數(shù) Unix/Linux

exit_group函數(shù) Unix/Linux

1. exit_group函數(shù) Unix/Linux

io_cancel()函數(shù) Unix/Linux

1. io_cancel()函數(shù) Unix/Linux

mmap()函數(shù) Unix/Linux

1. mmap()函數(shù) Unix/Linux

mremap()函數(shù) Unix/Linux

1. mremap()函數(shù) Unix/Linux

getitimer()函數(shù) Unix/Linux

1. getitimer()函數(shù) Unix/Linux

unimplemented()函數(shù) Unix/Linux

1. unimplemented()函數(shù) Unix/Linux

read()函數(shù) Unix/Linux

1. read()函數(shù) Unix/Linux

inl()函數(shù) Unix/Linux

1. inl()函數(shù) Unix/Linux

posix_fadvise()函數(shù) Unix/Linux

1. posix_fadvise()函數(shù) Unix/Linux

open()函數(shù) Unix/Linux

1. open()函數(shù) Unix/Linux

listen()函數(shù) Unix/Linux

1. listen()函數(shù) Unix/Linux

io_destroy()函數(shù) Unix/Linux

1. io_destroy()函數(shù) Unix/Linux

acct()函數(shù) Unix/Linux

1. acct()函數(shù) Unix/Linux

fcntl()函數(shù) Unix/Linux

1. fcntl()函數(shù) Unix/Linux

recvmsg()函數(shù) Unix/Linux

1. recvmsg()函數(shù) Unix/Linux

statfs()函數(shù) Unix/Linux

1. statfs()函數(shù) Unix/Linux

oldlstat()函數(shù) Unix/Linux

1. oldlstat()函數(shù) Unix/Linux

outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

getpagesize()函數(shù) Unix/Linux

1. getpagesize()函數(shù) Unix/Linux

sched_yield()函數(shù) Unix/Linux

1. sched_yield()函數(shù) Unix/Linux

outw()函數(shù) Unix/Linux

1. outw()函數(shù) Unix/Linux

inw_p()函數(shù) Unix/Linux

1. inw_p()函數(shù) Unix/Linux

setpgid()函數(shù) Unix/Linux

1. setpgid()函數(shù) Unix/Linux

quotactl()函數(shù) Unix/Linux

1. quotactl()函數(shù) Unix/Linux

prctl()函數(shù) Unix/Linux

1. prctl()函數(shù) Unix/Linux

fattach()函數(shù) Unix/Linux

1. fattach()函數(shù) Unix/Linux

readahead()函數(shù) Unix/Linux

1. readahead()函數(shù) Unix/Linux

msgget()函數(shù) Unix/Linux

1. msgget()函數(shù) Unix/Linux

gethostname()函數(shù) Unix/Linux

1. gethostname()函數(shù) Unix/Linux

semctl()函數(shù) Unix/Linux

1. semctl()函數(shù) Unix/Linux

munlockall()函數(shù) Unix/Linux

1. munlockall()函數(shù) Unix/Linux

iopl()函數(shù) Unix/Linux

1. iopl()函數(shù) Unix/Linux

fdetach()函數(shù) Unix/Linux

1. fdetach()函數(shù) Unix/Linux

getuid()函數(shù) Unix/Linux

1. getuid()函數(shù) Unix/Linux

gettid()函數(shù) Unix/Linux

1. gettid()函數(shù) Unix/Linux

pwrite()函數(shù) Unix/Linux

1. pwrite()函數(shù) Unix/Linux

isastream()函數(shù) Unix/Linux

1. isastream()函數(shù) Unix/Linux

get_thread_area()函數(shù) Unix/Linux

1. get_thread_area()函數(shù) Unix/Linux

mpx()函數(shù) Unix/Linux

1. mpx()函數(shù) Unix/Linux

io_getevents()函數(shù) Unix/Linux

1. io_getevents()函數(shù) Unix/Linux

lstat()函數(shù) Unix/Linux

1. lstat()函數(shù) Unix/Linux

readv()函數(shù) Unix/Linux

1. readv()函數(shù) Unix/Linux

exit()函數(shù) Unix/Linux

1. exit()函數(shù) Unix/Linux

inw()函數(shù) Unix/Linux

1. inw()函數(shù) Unix/Linux

fchmod()函數(shù) Unix/Linux

1. fchmod()函數(shù) Unix/Linux

mq_getsetattr()函數(shù) Unix/Linux

1. mq_getsetattr()函數(shù) Unix/Linux

get_robust_list()函數(shù) Unix/Linux

1. get_robust_list()函數(shù) Unix/Linux

_llseek()函數(shù) Unix/Linux

1. _llseek()函數(shù) Unix/Linux

gettimeofday()函數(shù) Unix/Linux

1. gettimeofday()函數(shù) Unix/Linux

nice()函數(shù) Unix/Linux

1. nice()函數(shù) Unix/Linux

security()函數(shù) Unix/Linux

1. security()函數(shù) Unix/Linux

sched_get_priority_max()函數(shù) Unix/Linux

1. sched_get_priority_max()函數(shù) Unix/Linux

outb_p()函數(shù) Unix/Linux

1. outb_p()函數(shù) Unix/Linux

intro()函數(shù) Unix/Linux

1. intro()函數(shù) Unix/Linux

alarm()函數(shù) Unix/Linux

1. alarm()函數(shù) Unix/Linux

putmsg()函數(shù) Unix/Linux

1. putmsg()函數(shù) Unix/Linux

fork()函數(shù) Unix/Linux

1. fork()函數(shù) Unix/Linux

getpgrp()函數(shù) Unix/Linux

1. getpgrp()函數(shù) Unix/Linux

link()函數(shù) Unix/Linux

1. link()函數(shù) Unix/Linux

getcwd()函數(shù) Unix/Linux

1. getcwd()函數(shù) Unix/Linux

insl()函數(shù) Unix/Linux

1. insl()函數(shù) Unix/Linux

getsockname()函數(shù) Unix/Linux

1. getsockname()函數(shù) Unix/Linux

dup()函數(shù) Unix/Linux

1. dup()函數(shù) Unix/Linux

connect()函數(shù) Unix/Linux

1. connect()函數(shù) Unix/Linux

select()函數(shù) Unix/Linux

1. select()函數(shù) Unix/Linux

futex()函數(shù) Unix/Linux

1. futex()函數(shù) Unix/Linux

outsw()函數(shù) Unix/Linux

1. outsw()函數(shù) Unix/Linux

query_module()函數(shù) Unix/Linux

1. query_module()函數(shù) Unix/Linux

reboot()函數(shù) Unix/Linux

1. reboot()函數(shù) Unix/Linux

create_module()函數(shù) Unix/Linux

1. create_module()函數(shù) Unix/Linux

adjtimex()函數(shù) Unix/Linux

1. adjtimex()函數(shù) Unix/Linux

mlock()函數(shù) Unix/Linux

1. mlock()函數(shù) Unix/Linux

statvfs()函數(shù) Unix/Linux

1. statvfs()函數(shù) Unix/Linux

gtty()函數(shù) Unix/Linux

1. gtty()函數(shù) Unix/Linux

epoll_create()函數(shù) Unix/Linux

1. epoll_create()函數(shù) Unix/Linux

bind()函數(shù) Unix/Linux

1. bind()函數(shù) Unix/Linux

inl_p()函數(shù) Unix/Linux

1. inl_p()函數(shù) Unix/Linux

select_tut()函數(shù) Unix/Linux

1. select_tut()函數(shù) Unix/Linux

mincore()函數(shù) Unix/Linux

1. mincore()函數(shù) Unix/Linux

getresuid()函數(shù) Unix/Linux

1. getresuid()函數(shù) Unix/Linux

getpmsg()函數(shù) Unix/Linux

1. getpmsg()函數(shù) Unix/Linux

getcontext()函數(shù) Unix/Linux

1. getcontext()函數(shù) Unix/Linux

killpg()函數(shù) Unix/Linux

1. killpg()函數(shù) Unix/Linux

olduname()函數(shù) Unix/Linux

1. olduname()函數(shù) Unix/Linux

openat()函數(shù) Unix/Linux

1. openat()函數(shù) Unix/Linux

pause()函數(shù) Unix/Linux

1. pause()函數(shù) Unix/Linux

alloc_hugepages()函數(shù) Unix/Linux

1. alloc_hugepages()函數(shù) Unix/Linux

ioctl_list()函數(shù) Unix/Linux

1. ioctl_list()函數(shù) Unix/Linux

readlinkat()函數(shù) Unix/Linux

1. readlinkat()函數(shù) Unix/Linux

mprotect()函數(shù) Unix/Linux

1. mprotect()函數(shù) Unix/Linux

getdomainname()函數(shù) Unix/Linux

1. getdomainname()函數(shù) Unix/Linux

readlink()函數(shù) Unix/Linux

1. readlink()函數(shù) Unix/Linux

madvise()函數(shù) Unix/Linux

1. madvise()函數(shù) Unix/Linux

bdflush()函數(shù) Unix/Linux

1. bdflush()函數(shù) Unix/Linux

ipc()函數(shù) Unix/Linux

1. ipc()函數(shù) Unix/Linux

ptrace()函數(shù) Unix/Linux

1. ptrace()函數(shù) Unix/Linux

getrusage()函數(shù) Unix/Linux

1. getrusage()函數(shù) Unix/Linux

msync()函數(shù) Unix/Linux

1. msync()函數(shù) Unix/Linux

faccessat()函數(shù) Unix/Linux

1. faccessat()函數(shù) Unix/Linux

modify_ldt()函數(shù) Unix/Linux

1. modify_ldt()函數(shù) Unix/Linux

get_kernel_syms()函數(shù) Unix/Linux

1. get_kernel_syms()函數(shù) Unix/Linux

getpid()函數(shù) Unix/Linux

1. getpid()函數(shù) Unix/Linux

fsync()函數(shù) Unix/Linux

1. fsync()函數(shù) Unix/Linux

msgctl()函數(shù) Unix/Linux

1. msgctl()函數(shù) Unix/Linux

break未實(shí)現(xiàn) Unix/Linux

1. break未實(shí)現(xiàn) Unix/Linux

sched_setparam()函數(shù) Unix/Linux

1. sched_setparam()函數(shù) Unix/Linux

fchown()函數(shù) Unix/Linux

1. fchown()函數(shù) Unix/Linux

cacheflush()函數(shù) Unix/Linux

1. cacheflush()函數(shù) Unix/Linux

fdatasync()函數(shù) Unix/Linux

1. fdatasync()函數(shù) Unix/Linux

flock()函數(shù) Unix/Linux

1. flock()函數(shù) Unix/Linux

pivot_root()函數(shù) Unix/Linux

1. pivot_root()函數(shù) Unix/Linux

inotify_init()函數(shù) Unix/Linux

1. inotify_init()函數(shù) Unix/Linux

fchmodat()函數(shù) Unix/Linux

1. fchmodat()函數(shù) Unix/Linux

keyctl()函數(shù) Unix/Linux

1. keyctl()函數(shù) Unix/Linux

llseek()函數(shù) Unix/Linux

1. llseek()函數(shù) Unix/Linux

outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

pipe()函數(shù) Unix/Linux

1. pipe()函數(shù) Unix/Linux

io_submit()函數(shù) Unix/Linux

1. io_submit()函數(shù) Unix/Linux

ppoll()函數(shù) Unix/Linux

1. ppoll()函數(shù) Unix/Linux

multiplexer()函數(shù) Unix/Linux

1. multiplexer()函數(shù) Unix/Linux

access()函數(shù) Unix/Linux

1. access()函數(shù) Unix/Linux

sched_getparam()函數(shù) Unix/Linux

1. sched_getparam()函數(shù) Unix/Linux

chown()函數(shù) Unix/Linux

1. chown()函數(shù) Unix/Linux

readdir()函數(shù) Unix/Linux

1. readdir()函數(shù) Unix/Linux

inb_p()函數(shù) Unix/Linux

1. inb_p()函數(shù) Unix/Linux

outsl()函數(shù) Unix/Linux

1. outsl()函數(shù) Unix/Linux

nanosleep()函數(shù) Unix/Linux

1. nanosleep()函數(shù) Unix/Linux

alloc_hugepages()函數(shù) Unix/Linux

1. alloc_hugepages()函數(shù) Unix/Linux

sbrk()函數(shù) Unix/Linux

1. sbrk()函數(shù) Unix/Linux

move_pages()函數(shù) Unix/Linux

1. move_pages()函數(shù) Unix/Linux

fchdir()函數(shù) Unix/Linux

1. fchdir()函數(shù) Unix/Linux

renameat()函數(shù) Unix/Linux

1. renameat()函數(shù) Unix/Linux

getppid()函數(shù) Unix/Linux

1. getppid()函數(shù) Unix/Linux

getsid()函數(shù) Unix/Linux

1. getsid()函數(shù) Unix/Linux

oldfstat()函數(shù) Unix/Linux

1. oldfstat()函數(shù) Unix/Linux

lseek()函數(shù) Unix/Linux

1. lseek()函數(shù) Unix/Linux

stat()函數(shù) Unix/Linux

1. stat()函數(shù) Unix/Linux

path_resolution()函數(shù) Unix/Linux

1. path_resolution()函數(shù) Unix/Linux

getunwind()函數(shù) Unix/Linux

1. getunwind()函數(shù) Unix/Linux

getsockopt()函數(shù) Unix/Linux

1. getsockopt()函數(shù) Unix/Linux

mmap2()函數(shù) Unix/Linux

1. mmap2()函數(shù) Unix/Linux

getdents()函數(shù) Unix/Linux

1. getdents()函數(shù) Unix/Linux

fchownat()函數(shù) Unix/Linux

1. fchownat()函數(shù) Unix/Linux

mkdir()函數(shù) Unix/Linux

1. mkdir()函數(shù) Unix/Linux

perfmonctl()函數(shù) Unix/Linux

1. perfmonctl()函數(shù) Unix/Linux

open()函數(shù) Unix/Linux

1. open()函數(shù) Unix/Linux

idle()函數(shù) Unix/Linux

1. idle()函數(shù) Unix/Linux

poll()函數(shù) Unix/Linux

1. poll()函數(shù) Unix/Linux

brk()函數(shù) Unix/Linux

1. brk()函數(shù) Unix/Linux

sched_setaffinity()函數(shù) Unix/Linux

1. sched_setaffinity()函數(shù) Unix/Linux

mlockall()函數(shù) Unix/Linux

1. mlockall()函數(shù) Unix/Linux

msgget()函數(shù) Unix/Linux

msgget - 得到一個(gè)消息隊(duì)列標(biāo)識(shí)符

內(nèi)容簡(jiǎn)介

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>

int msgget(key_t key, int msgflg);

描述

The msgget() system call returns the message queue identifier associated with the value of the key argument. A new message queue is created if key has the valueIPC_PRIVATE or key isn’t IPC_PRIVATE, no message queue with the given key keyexists, and IPC_CREAT is specified in msgflg.

If msgflg specifies both IPC_CREAT and IPC_EXCL and a message queue already exists for key, then msgget() fails with errno set to EEXIST. (This is analogous to the effect of the combination O_CREAT | O_EXCL for open(2).)

Upon creation, the least significant bits of the argument msgflg define the permissions of the message queue. These permission bits have the same format and semantics as the permissions specified for the mode argument of open(2). (The execute permissions are not used.)

If a new message queue is created, then its associated data structure msqid_ds (seemsgctl(2)) is initialised as follows:

標(biāo)簽	描述
	msg_perm.cuid and msg_perm.uid are set to the effective user ID of the calling process.
	msg_perm.cgid and msg_perm.gid are set to the effective group ID of the calling process.
	The least significant 9 bits of msg_perm.mode are set to the least significant 9 bits of msgflg.
	msg_qnum, msg_lspid, msg_lrpid, msg_stime and msg_rtime are set to 0.
	msg_ctime is set to the current time.
	msg_qbytes is set to the system limit MSGMNB.

如果消息隊(duì)列中已經(jīng)存在的權(quán)限進(jìn)行了驗(yàn)證，并進(jìn)行檢查，看它是否被標(biāo)記銷毀。

返回值

If successful, the return value will be the message queue identifier (a nonnegative integer), otherwise -1 with errno indicating the error.

錯(cuò)誤

On failure, errno is set to one of the following values:

標(biāo)簽	描述
EACCES	A message queue exists for key, but the calling process does not have permission to access the queue, and does not have the CAP_IPC_OWNER capability.
EEXIST	A message queue exists for key and msgflg specified bothIPC_CREAT and IPC_EXCL.
ENOENT	No message queue exists for key and msgflg did not specifyIPC_CREAT.
ENOMEM	A message queue has to be created but the system does not have enough memory for the new data structure.
ENOSPC	A message queue has to be created but the system limit for the maximum number of message queues (MSGMNI) would be exceeded.

注意

IPC_PRIVATE isn’t a flag field but a key_t type. If this special value is used for key, the system call ignores everything but the least significant 9 bits of msgflg and creates a new message queue (on success).

The following is a system limit on message queue resources affecting a msgget() call:

標(biāo)簽	描述
MSGMNI	System wide maximum number of message queues: policy dependent (on Linux, this limit can be read and modified via/proc/sys/kernel/msgmni).

BUGS

The name choice IPC_PRIVATE was perhaps unfortunate, IPC_NEW would more clearly show its function.

遵循于

SVr4, POSIX.1-2001.

LINUX 注意

Until version 2.3.20 Linux would return EIDRM for a msgget() on a message queue scheduled for deletion.

另請(qǐng)參閱

msgctl (2)
msgrcv (2)
msgsnd (2)

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