[lkml]   [2020]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] lseek.2: SYNOPSIS: Use correct types
The Linux kernel uses 'unsigned int' instead of 'int'
for 'fd' and 'whence'.
As glibc provides no wrapper, use the same types the kernel uses.

src/linux$ grep -rn "SYSCALL_DEFINE.*lseek"
fs/read_write.c:322:SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence)
fs/read_write.c:328:COMPAT_SYSCALL_DEFINE3(lseek, unsigned int, fd, compat_off_t, offset, unsigned int, whence)
fs/read_write.c:336:SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
arch/mips/kernel/linux32.c:65:SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,

src/linux$ sed -n 322,325p fs/read_write.c
SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence)
return ksys_lseek(fd, offset, whence);

Signed-off-by: Alejandro Colomar <>
man2/lseek.2 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/man2/lseek.2 b/man2/lseek.2
index e35e410a6..2ff878ffa 100644
--- a/man2/lseek.2
+++ b/man2/lseek.2
@@ -51,7 +51,7 @@ lseek \- reposition read/write file offset
.B #include <unistd.h>
-.BI "off_t lseek(int " fd ", off_t " offset ", int " whence );
+.BI "off_t lseek(unsigned int " fd ", off_t " offset ", unsigned int " whence );
.BR lseek ()
repositions the file offset of the open file description
 \ /
  Last update: 2020-11-21 18:36    [W:0.052 / U:4.800 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site