[PATCH 17/39] llseek.2: Use syscall(SYS_...); for system calls without a wrapper
Alejandro Colomar
alx.manpages@gmail.com
Mon May 10 17:55:26 GMT 2021
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
man2/llseek.2 | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/man2/llseek.2 b/man2/llseek.2
index 6a36fb6ea..87f45f219 100644
--- a/man2/llseek.2
+++ b/man2/llseek.2
@@ -31,15 +31,19 @@
_llseek \- reposition read/write file offset
.SH SYNOPSIS
.nf
+.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
-.BI "int _llseek(unsigned int " fd ", unsigned long " offset_high ,
+.BI "int syscall(SYS__llseek, unsigned int " fd ", unsigned long " offset_high ,
.BI " unsigned long " offset_low ", loff_t *" result ,
.BI " unsigned int " whence );
.fi
.PP
.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
+glibc provides no wrapper for
+.BR _llseek (),
+necessitating the use of
+.BR syscall (2).
.SH DESCRIPTION
Note: for information about the
.BR llseek (3)
@@ -97,10 +101,7 @@ is invalid.
This function is Linux-specific, and should not be used in programs
intended to be portable.
.SH NOTES
-Glibc does not provide a wrapper for this system call.
-To invoke it directly, use
-.BR syscall (2).
-However, you probably want to use the
+You probably want to use the
.BR lseek (2)
wrapper function instead.
.SH SEE ALSO
--
2.31.1
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