* [PATCH] bdflush.2, capget.2, get_mempolicy.2, ipc.2, lookup_dcookie.2, mbind.2, migrate_pages.2: Add notes about missing glibc wrappers
@ 2021-02-04 11:15 Alejandro Colomar
2021-02-06 20:49 ` Michael Kerrisk (man-pages)
0 siblings, 1 reply; 2+ messages in thread
From: Alejandro Colomar @ 2021-02-04 11:15 UTC (permalink / raw)
To: mtk.manpages; +Cc: Alejandro Colomar, linux-man, libc-alpha
.../glibc$ grep_syscall_wrapper bdflush
.../glibc$ grep_syscall_wrapper capget
.../glibc$ grep_syscall_wrapper capset
.../glibc$ grep_syscall_wrapper get_mempolicy
.../glibc$ grep_syscall_wrapper ipc
.../glibc$ grep_syscall_wrapper lookup_dcookie
.../glibc$ grep_syscall_wrapper mbind
.../glibc$ grep_syscall_wrapper migrate_pages
.../glibc$
function grep_syscall_wrapper()
{
if ! [ -v 1 ]; then
>&2 echo "Usage: ${FUNCNAME[0]} <syscall>";
return ${EX_USAGE};
fi
find * -type f \
|grep '\.h$' \
|sort -V \
|xargs pcregrep -Mn \
"(?s)^[^\s#][\w\s]+\s+\**${1}\s*\([\w\s()[\]*,]*?(...)?\)[\w\s()]*;" \
|sed -E 's/^[^:]+:[0-9]+:/&\n/';
}
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
man2/bdflush.2 | 3 +++
man2/capget.2 | 6 ++++++
man2/get_mempolicy.2 | 4 ++++
man2/ipc.2 | 6 ++++++
man2/lookup_dcookie.2 | 6 ++++++
man2/mbind.2 | 4 ++++
man2/migrate_pages.2 | 4 ++++
7 files changed, 33 insertions(+)
diff --git a/man2/bdflush.2 b/man2/bdflush.2
index 93190ee3a..6e69155bf 100644
--- a/man2/bdflush.2
+++ b/man2/bdflush.2
@@ -34,6 +34,9 @@ bdflush \- start, flush, or tune buffer-dirty-flush daemon
.BI "int bdflush(int " func ", long *" address );
.BI "int bdflush(int " func ", long " data );
.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see VERSIONS.
.SH DESCRIPTION
.IR Note :
Since Linux 2.6,
diff --git a/man2/capget.2 b/man2/capget.2
index 226a917e7..ea504c28c 100644
--- a/man2/capget.2
+++ b/man2/capget.2
@@ -23,6 +23,9 @@ capget, capset \- set/get capabilities of thread(s)
.BI "int capget(cap_user_header_t " hdrp ", cap_user_data_t " datap );
.BI "int capset(cap_user_header_t " hdrp ", const cap_user_data_t " datap );
.fi
+.PP
+.IR Note :
+There are no glibc wrappers for these system calls; see NOTES.
.SH DESCRIPTION
These two system calls are the raw kernel interface for getting and
setting thread capabilities.
@@ -236,6 +239,9 @@ No such thread.
.SH CONFORMING TO
These system calls are Linux-specific.
.SH NOTES
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
+.PP
The portable interface to the capability querying and setting
functions is provided by the
.I libcap
diff --git a/man2/get_mempolicy.2 b/man2/get_mempolicy.2
index 1ee68933b..fbcab2a7c 100644
--- a/man2/get_mempolicy.2
+++ b/man2/get_mempolicy.2
@@ -37,6 +37,9 @@ get_mempolicy \- retrieve NUMA memory policy for a thread
.PP
Link with \fI\-lnuma\fP.
.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
.SH DESCRIPTION
.BR get_mempolicy ()
retrieves the NUMA policy of the calling thread or of a memory address,
@@ -239,6 +242,7 @@ system call was added to the Linux kernel in version 2.6.7.
.SH CONFORMING TO
This system call is Linux-specific.
.SH NOTES
+Glibc does not provide a wrapper for this system call.
For information on library support, see
.BR numa (7).
.SH SEE ALSO
diff --git a/man2/ipc.2 b/man2/ipc.2
index 469185638..d2b409ff9 100644
--- a/man2/ipc.2
+++ b/man2/ipc.2
@@ -31,6 +31,9 @@ ipc \- System V IPC system calls
", int " third ,
.BI " void *" ptr ", long " fifth );
.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
.SH DESCRIPTION
.BR ipc ()
is a common kernel entry point for the System\ V IPC calls
@@ -54,6 +57,9 @@ system call; instead,
.BR semctl (2),
.BR shmctl (2),
and so on really are implemented as separate system calls.
+.PP
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
.SH SEE ALSO
.BR msgctl (2),
.BR msgget (2),
diff --git a/man2/lookup_dcookie.2 b/man2/lookup_dcookie.2
index c2f2a87e6..e38ca89a4 100644
--- a/man2/lookup_dcookie.2
+++ b/man2/lookup_dcookie.2
@@ -31,6 +31,9 @@ lookup_dcookie \- return a directory entry's path
.nf
.BI "int lookup_dcookie(u64 " cookie ", char *" buffer ", size_t " len );
.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
.SH DESCRIPTION
Look up the full path of the directory entry specified by the value
.IR cookie .
@@ -89,5 +92,8 @@ It relies on a kernel driver to register cookies for directory entries.
.PP
The path returned may be suffixed by the string " (deleted)" if the directory
entry has been removed.
+.PP
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
.SH SEE ALSO
.BR oprofile (1)
diff --git a/man2/mbind.2 b/man2/mbind.2
index d98969e7f..bfec5dd1b 100644
--- a/man2/mbind.2
+++ b/man2/mbind.2
@@ -45,6 +45,9 @@ mbind \- set memory policy for a memory range
.PP
Link with \fI\-lnuma\fP.
.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
.SH DESCRIPTION
.BR mbind ()
sets the NUMA memory policy,
@@ -425,6 +428,7 @@ system call was added to the Linux kernel in version 2.6.7.
.SH CONFORMING TO
This system call is Linux-specific.
.SH NOTES
+Glibc does not provide a wrapper for this system call.
For information on library support, see
.BR numa (7).
.PP
diff --git a/man2/migrate_pages.2 b/man2/migrate_pages.2
index cbba5350d..e4c7af92d 100644
--- a/man2/migrate_pages.2
+++ b/man2/migrate_pages.2
@@ -27,6 +27,9 @@ migrate_pages \- move all pages in a process to another set of nodes
.BI " const unsigned long *" new_nodes );
.fi
.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
+.PP
Link with \fI\-lnuma\fP.
.SH DESCRIPTION
.BR migrate_pages ()
@@ -140,6 +143,7 @@ system call first appeared on Linux in version 2.6.16.
.SH CONFORMING TO
This system call is Linux-specific.
.SH NOTES
+Glibc does not provide a wrapper for this system call.
For information on library support, see
.BR numa (7).
.PP
--
2.30.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] bdflush.2, capget.2, get_mempolicy.2, ipc.2, lookup_dcookie.2, mbind.2, migrate_pages.2: Add notes about missing glibc wrappers
2021-02-04 11:15 [PATCH] bdflush.2, capget.2, get_mempolicy.2, ipc.2, lookup_dcookie.2, mbind.2, migrate_pages.2: Add notes about missing glibc wrappers Alejandro Colomar
@ 2021-02-06 20:49 ` Michael Kerrisk (man-pages)
0 siblings, 0 replies; 2+ messages in thread
From: Michael Kerrisk (man-pages) @ 2021-02-06 20:49 UTC (permalink / raw)
To: Alejandro Colomar; +Cc: mtk.manpages, linux-man, libc-alpha
Hi Alex,
On 2/4/21 12:15 PM, Alejandro Colomar wrote:
> .../glibc$ grep_syscall_wrapper bdflush
> .../glibc$ grep_syscall_wrapper capget
> .../glibc$ grep_syscall_wrapper capset
> .../glibc$ grep_syscall_wrapper get_mempolicy
> .../glibc$ grep_syscall_wrapper ipc
> .../glibc$ grep_syscall_wrapper lookup_dcookie
> .../glibc$ grep_syscall_wrapper mbind
> .../glibc$ grep_syscall_wrapper migrate_pages
> .../glibc$
>
> function grep_syscall_wrapper()
> {
> if ! [ -v 1 ]; then
> >&2 echo "Usage: ${FUNCNAME[0]} <syscall>";
> return ${EX_USAGE};
> fi
>
> find * -type f \
> |grep '\.h$' \
> |sort -V \
> |xargs pcregrep -Mn \
> "(?s)^[^\s#][\w\s]+\s+\**${1}\s*\([\w\s()[\]*,]*?(...)?\)[\w\s()]*;" \
> |sed -E 's/^[^:]+:[0-9]+:/&\n/';
> }
>
> Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Thanks. Patch applied, with one follow-up tweak.
Cheers,
Michael
> ---
> man2/bdflush.2 | 3 +++
> man2/capget.2 | 6 ++++++
> man2/get_mempolicy.2 | 4 ++++
> man2/ipc.2 | 6 ++++++
> man2/lookup_dcookie.2 | 6 ++++++
> man2/mbind.2 | 4 ++++
> man2/migrate_pages.2 | 4 ++++
> 7 files changed, 33 insertions(+)
>
> diff --git a/man2/bdflush.2 b/man2/bdflush.2
> index 93190ee3a..6e69155bf 100644
> --- a/man2/bdflush.2
> +++ b/man2/bdflush.2
> @@ -34,6 +34,9 @@ bdflush \- start, flush, or tune buffer-dirty-flush daemon
> .BI "int bdflush(int " func ", long *" address );
> .BI "int bdflush(int " func ", long " data );
> .fi
> +.PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see VERSIONS.
> .SH DESCRIPTION
> .IR Note :
> Since Linux 2.6,
> diff --git a/man2/capget.2 b/man2/capget.2
> index 226a917e7..ea504c28c 100644
> --- a/man2/capget.2
> +++ b/man2/capget.2
> @@ -23,6 +23,9 @@ capget, capset \- set/get capabilities of thread(s)
> .BI "int capget(cap_user_header_t " hdrp ", cap_user_data_t " datap );
> .BI "int capset(cap_user_header_t " hdrp ", const cap_user_data_t " datap );
> .fi
> +.PP
> +.IR Note :
> +There are no glibc wrappers for these system calls; see NOTES.
> .SH DESCRIPTION
> These two system calls are the raw kernel interface for getting and
> setting thread capabilities.
> @@ -236,6 +239,9 @@ No such thread.
> .SH CONFORMING TO
> These system calls are Linux-specific.
> .SH NOTES
> +Glibc does not provide a wrapper for this system call; call it using
> +.BR syscall (2).
> +.PP
> The portable interface to the capability querying and setting
> functions is provided by the
> .I libcap
> diff --git a/man2/get_mempolicy.2 b/man2/get_mempolicy.2
> index 1ee68933b..fbcab2a7c 100644
> --- a/man2/get_mempolicy.2
> +++ b/man2/get_mempolicy.2
> @@ -37,6 +37,9 @@ get_mempolicy \- retrieve NUMA memory policy for a thread
> .PP
> Link with \fI\-lnuma\fP.
> .fi
> +.PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see NOTES.
> .SH DESCRIPTION
> .BR get_mempolicy ()
> retrieves the NUMA policy of the calling thread or of a memory address,
> @@ -239,6 +242,7 @@ system call was added to the Linux kernel in version 2.6.7.
> .SH CONFORMING TO
> This system call is Linux-specific.
> .SH NOTES
> +Glibc does not provide a wrapper for this system call.
> For information on library support, see
> .BR numa (7).
> .SH SEE ALSO
> diff --git a/man2/ipc.2 b/man2/ipc.2
> index 469185638..d2b409ff9 100644
> --- a/man2/ipc.2
> +++ b/man2/ipc.2
> @@ -31,6 +31,9 @@ ipc \- System V IPC system calls
> ", int " third ,
> .BI " void *" ptr ", long " fifth );
> .fi
> +.PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see NOTES.
> .SH DESCRIPTION
> .BR ipc ()
> is a common kernel entry point for the System\ V IPC calls
> @@ -54,6 +57,9 @@ system call; instead,
> .BR semctl (2),
> .BR shmctl (2),
> and so on really are implemented as separate system calls.
> +.PP
> +Glibc does not provide a wrapper for this system call; call it using
> +.BR syscall (2).
> .SH SEE ALSO
> .BR msgctl (2),
> .BR msgget (2),
> diff --git a/man2/lookup_dcookie.2 b/man2/lookup_dcookie.2
> index c2f2a87e6..e38ca89a4 100644
> --- a/man2/lookup_dcookie.2
> +++ b/man2/lookup_dcookie.2
> @@ -31,6 +31,9 @@ lookup_dcookie \- return a directory entry's path
> .nf
> .BI "int lookup_dcookie(u64 " cookie ", char *" buffer ", size_t " len );
> .fi
> +.PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see NOTES.
> .SH DESCRIPTION
> Look up the full path of the directory entry specified by the value
> .IR cookie .
> @@ -89,5 +92,8 @@ It relies on a kernel driver to register cookies for directory entries.
> .PP
> The path returned may be suffixed by the string " (deleted)" if the directory
> entry has been removed.
> +.PP
> +Glibc does not provide a wrapper for this system call; call it using
> +.BR syscall (2).
> .SH SEE ALSO
> .BR oprofile (1)
> diff --git a/man2/mbind.2 b/man2/mbind.2
> index d98969e7f..bfec5dd1b 100644
> --- a/man2/mbind.2
> +++ b/man2/mbind.2
> @@ -45,6 +45,9 @@ mbind \- set memory policy for a memory range
> .PP
> Link with \fI\-lnuma\fP.
> .fi
> +.PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see NOTES.
> .SH DESCRIPTION
> .BR mbind ()
> sets the NUMA memory policy,
> @@ -425,6 +428,7 @@ system call was added to the Linux kernel in version 2.6.7.
> .SH CONFORMING TO
> This system call is Linux-specific.
> .SH NOTES
> +Glibc does not provide a wrapper for this system call.
> For information on library support, see
> .BR numa (7).
> .PP
> diff --git a/man2/migrate_pages.2 b/man2/migrate_pages.2
> index cbba5350d..e4c7af92d 100644
> --- a/man2/migrate_pages.2
> +++ b/man2/migrate_pages.2
> @@ -27,6 +27,9 @@ migrate_pages \- move all pages in a process to another set of nodes
> .BI " const unsigned long *" new_nodes );
> .fi
> .PP
> +.IR Note :
> +There is no glibc wrapper for this system call; see NOTES.
> +.PP
> Link with \fI\-lnuma\fP.
> .SH DESCRIPTION
> .BR migrate_pages ()
> @@ -140,6 +143,7 @@ system call first appeared on Linux in version 2.6.16.
> .SH CONFORMING TO
> This system call is Linux-specific.
> .SH NOTES
> +Glibc does not provide a wrapper for this system call.
> For information on library support, see
> .BR numa (7).
> .PP
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-02-04 11:15 [PATCH] bdflush.2, capget.2, get_mempolicy.2, ipc.2, lookup_dcookie.2, mbind.2, migrate_pages.2: Add notes about missing glibc wrappers Alejandro Colomar
2021-02-06 20:49 ` Michael Kerrisk (man-pages)
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