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msgget —

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Standard C Library (libc, -lc)

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<sys/types.h> <sys/ipc.h> <sys/msg.h> int msgget(key_t key, int msgflg)

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msgget() ?ϡ? key ?˴?Ϣ???????å????????塼 ID ???ᤷ?ޤ??????å????????塼 ID ?ϡ? 0 ?????礭??????Ū???????Ǥ???

???å????????塼?ϡ? key ?? IPC_PRIVATE ???????????硢?ޤ??? key ?˴?Ϣ???????å????????塼 ID ??¸?ߤ????????ġ? IPC_CREAT ?ӥåȤ? msgflg ?????ꤵ???Ƥ????????˺????????ޤ???

?????????å????????塼?????????줿???硢??Ϣ?????ǡ?????¤ ( msqid_ds ??¤?Ρ? msgctl(3) ????) ?ϡ??ʲ??Τ褦?˽??????????ޤ???

msg_perm.cuid ?? msg_perm.uid ?ϡ??ƤӽФ??ץ??????μ¸??桼?? ID ?????ꤵ???ޤ???
msg_perm.gid ?? msg_perm.cgid ?ϡ??ƤӽФ??ץ??????μ¸????롼?? ID ?????ꤵ???ޤ???
msg_perm.mode ?ϡ? msgflg ?β??? 9 ?ӥåȤ????ꤵ???ޤ???
msg_cbytes, msg_qnum, msg_lspid, msg_lrpid, msg_rtime, msg_stime ?ˤ? 0 ?????ꤵ???ޤ???
msg_qbytes ?ϡ????塼?ΥХ??ȿ? (MSGMNB) ?ˤĤ??ƤΥ????ƥ??κ????ͤ????ꤵ???ޤ???
msg_ctime ?ϡ????ߤλ????????ꤵ???ޤ???

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?????ʤ???λ?????ȡ????Υ??å????????塼 ID ???ᤵ???ޤ????????ʤ? ??λ???ʤ??? -1 ???ᤵ?졢???????Х??ѿ? errno ?????Υ??顼?򼨤??褦?????ꤵ???ޤ???

???顼

[EACESS]: ???å????????塼?? key ?Ȥ??Ǥ˴?Ϣ???Ƥ??ޤ??????ƽФ?¦?˥????????????????ޤ?????
[EEXIST]: IPC_CREAT ?? IPC_EXCL ??ξ???? msgflg ?????ꤵ???Ƥ??ꡢ???å????????塼?? key ?Ȥ??Ǥ˴?Ϣ???Ƥ??ޤ???
[ENOSPC]: ???å????????塼?ο??˴ؤ??륷???ƥ????¤?ã???Ƥ??뤿?ᡢ ?????????å????????塼???????Ǥ??ޤ?????
[ENOENT]: msgflg ?? IPC_CREAT ?????ꤵ???Ƥ??ʤ??????ǡ? key ?˴?Ϣ???????å????????塼?????Ĥ????ޤ?????

??Ϣ????

msgctl(3), msgrcv(3), msgsnd(3)

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???å????????塼?ϡ? AT&T System V UNIX ?κǽ??Υ??꡼?????ɲä????ޤ?????