NAME<\/a> sysvipc \u2212 System V interprocess communication mechanisms<\/p>\n System V IPC is the name given to three interprocess communication mechanisms that are widely available on UNIX systems: message queues, semaphore, and shared memory.<\/p>\n Message queues<\/b> The System V message queue API consists of the following system calls: Create a new message queue or obtain the ID of an existing message queue. This call returns an identifier that is used in the remaining APIs.<\/p>\n msgsnd<\/b>(2)<\/p>\n Add a message to a queue.<\/p>\n msgrcv<\/b>(2)<\/p>\n Remove a message from a queue.<\/p>\n msgctl<\/b>(2)<\/p>\n Perform various control operations on a queue, including deletion.<\/p>\n Semaphore sets<\/b> The System V semaphore API consists of the following system calls: Create a new set or obtain the ID of an existing set. This call returns an identifier that is used in the remaining APIs.<\/p>\n semop<\/b>(2)<\/p>\n Perform operations on the semaphores in a set.<\/p>\n semctl<\/b>(2)<\/p>\n Perform various control operations on a set, including deletion.<\/p>\n Shared memory segments<\/b> The System V shared memory API consists of the following system calls: Create a new segment or obtain the ID of an existing segment. This call returns an identifier that is used in the remaining APIs.<\/p>\n shmat<\/b>(2)<\/p>\n Attach an existing shared memory object into the calling process\u2019s address space.<\/p>\n shmdt<\/b>(2)<\/p>\n Detach a segment from the calling process\u2019s address space.<\/p>\n shmctl<\/b>(2)<\/p>\n Perform various control operations on a segment, including deletion.<\/p>\n IPC namespaces<\/b> ipcmk<\/b>(1), ipcrm<\/b>(1), ipcs<\/b>(1), lsipc<\/b>(1), ipc<\/b>(2), msgctl<\/b>(2), msgget<\/b>(2), msgrcv<\/b>(2), msgsnd<\/b>(2), semctl<\/b>(2), semget<\/b>(2), semop<\/b>(2), shmat<\/b>(2), shmctl<\/b>(2), shmdt<\/b>(2), shmget<\/b>(2), ftok<\/b>(3), ipc_namespaces<\/b>(7)<\/p>\n This page is part of release 5.10 of the Linux man-pages<\/i> project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https:\/\/www.kernel.org\/doc\/man\u2212pages\/.<\/p>\n sysvipc \u2212 System V interprocess communication mechanisms <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[971],"tags":[973,972,1041],"class_list":["post-3949","post","type-post","status-publish","format-standard","hentry","category-7-miscelanea","tag-973","tag-man7","tag-sysvipc"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=3949"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3949\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=3949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=3949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=3949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
DESCRIPTION<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
DESCRIPTION <\/a> <\/h2>\n
System V message queues allow data to be exchanged in units called messages. Each messages can have an associated priority, POSIX message queues provide an alternative API for achieving the same result; see mq_overview<\/b>(7).<\/p>\n
msgget<\/b>(2)<\/p>\n
System V semaphores allow processes to synchronize their actions System V semaphores are allocated in groups called sets; each semaphore in a set is a counting semaphore. POSIX semaphores provide an alternative API for achieving the same result; see sem_overview<\/b>(7).<\/p>\n
semget<\/b>(2)<\/p>\n
System V shared memory allows processes to share a region a memory (a “segment”). POSIX shared memory is an alternative API for achieving the same result; see shm_overview<\/b>(7).<\/p>\n
shmget<\/b>(2)<\/p>\n
For a discussion of the interaction of System V IPC objects and IPC namespaces, see ipc_namespaces<\/b>(7).<\/p>\nSEE ALSO <\/a> <\/h2>\n
COLOPHON <\/a> <\/h2>\n
\n","protected":false},"excerpt":{"rendered":"