diff options
Diffstat (limited to 'man2/shmget.2')
| -rw-r--r-- | man2/shmget.2 | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/man2/shmget.2 b/man2/shmget.2 index 074e83e..685963a 100644 --- a/man2/shmget.2 +++ b/man2/shmget.2 @@ -15,7 +15,7 @@ .\" Language and formatting clean-ups .\" Added notes on /proc files .\" -.TH shmget 2 2023-03-30 "Linux man-pages 6.05.01" +.TH shmget 2 2023-10-31 "Linux man-pages 6.7" .SH NAME shmget \- allocates a System V shared memory segment .SH LIBRARY @@ -24,7 +24,7 @@ Standard C library .SH SYNOPSIS .nf .B #include <sys/shm.h> -.PP +.P .BI "int shmget(key_t " key ", size_t " size ", int " shmflg ); .fi .SH DESCRIPTION @@ -40,7 +40,7 @@ is zero and does not have the value .BR IPC_PRIVATE ), or to create a new set. -.PP +.P A new shared memory segment, with size equal to the value of .I size rounded up to a multiple of @@ -59,7 +59,7 @@ exists, and .B IPC_CREAT is specified in .IR shmflg . -.PP +.P If .I shmflg specifies both @@ -78,7 +78,7 @@ set to .B O_CREAT | O_EXCL for .BR open (2).) -.PP +.P The value .I shmflg is composed of: @@ -102,7 +102,9 @@ See the Linux kernel source file .I Documentation/admin\-guide/mm/hugetlbpage.rst for further information. .TP -.BR SHM_HUGE_2MB ", " SHM_HUGE_1GB " (since Linux 3.8)" +.B SHM_HUGE_2MB +.TQ +.BR SHM_HUGE_1GB " (since Linux 3.8)" .\" See https://lwn.net/Articles/533499/ Used in conjunction with .B SHM_HUGETLB @@ -143,7 +145,7 @@ in .BR proc (5). .\" As at 2.6.17-rc2, this flag has no effect if SHM_HUGETLB was also .\" specified. -.PP +.P In addition to the above flags, the least significant 9 bits of .I shmflg specify the permissions granted to the owner, group, and others. @@ -153,7 +155,7 @@ meaning, as the argument of .BR open (2). Presently, execute permissions are not used by the system. -.PP +.P When a new shared memory segment is created, its contents are initialized to zero values, and its associated data structure, @@ -190,7 +192,7 @@ are set to 0. .IP \[bu] .I shm_ctime is set to the current time. -.PP +.P If the shared memory segment already exists, the permissions are verified, and a check is made to see if it is marked for destruction. .SH RETURN VALUE @@ -263,7 +265,7 @@ in .BR proc (5). .SH STANDARDS POSIX.1-2008. -.PP +.P .B SHM_HUGETLB and .B SHM_NORESERVE @@ -380,7 +382,7 @@ On Linux, this limit can be read and modified via .\" Kernels between Linux 2.4.x and Linux 2.6.8 had an off-by-one error .\" that meant that we could create one more segment than SHMMNI -- MTK .\" This /proc file is not available in Linux 2.2 and earlier -- MTK -.PP +.P The implementation has no specific limits for the per-process maximum number of shared memory segments .RB ( SHMSEG ). |