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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:41:07 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:41:07 +0000 |
| commit | 3af6d22bb3850ab2bac67287e3a3d3b0e32868e5 (patch) | |
| tree | 3ee7a3ec64525911fa865bb984c86d997d855527 /man2/intro.2 | |
| parent | Adding debian version 6.05.01-1. (diff) | |
| download | manpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.tar.xz manpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.zip | |
Merging upstream version 6.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man2/intro.2')
| -rw-r--r-- | man2/intro.2 | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/man2/intro.2 b/man2/intro.2 index ef3d8cf..74af07c 100644 --- a/man2/intro.2 +++ b/man2/intro.2 @@ -6,7 +6,7 @@ .\" new _syscall(2) page, and substantially enhanced and rewrote .\" the remaining material on this page. .\" -.TH intro 2 2023-02-05 "Linux man-pages 6.05.01" +.TH intro 2 2023-10-31 "Linux man-pages 6.7" .SH NAME intro \- introduction to system calls .SH DESCRIPTION @@ -19,7 +19,7 @@ wrapper functions which perform the steps required the system call. Thus, making a system call looks the same as invoking a normal library function. -.PP +.P In many cases, the C library wrapper function does nothing more than: .IP \[bu] 3 copying arguments and the unique system call number to the @@ -32,7 +32,7 @@ setting .I errno if the system call returns an error number when the kernel returns the CPU to user mode. -.PP +.P However, in a few cases, a wrapper function may do rather more than this, for example, performing some preprocessing of the arguments before trapping to kernel mode, @@ -42,7 +42,7 @@ try to note the details of both the (usually GNU) C library API interface and the raw system call. Most commonly, the main DESCRIPTION will focus on the C library interface, and differences for the system call are covered in the NOTES section. -.PP +.P For a list of the Linux system calls, see .BR syscalls (2). .SH RETURN VALUE @@ -54,12 +54,12 @@ system call returns a negative value, the wrapper copies the absolute value into the .I errno variable, and returns \-1 as the return value of the wrapper. -.PP +.P The value returned by a successful system call depends on the call. Many system calls return 0 on success, but some can return nonzero values from a successful call. The details are described in the individual manual pages. -.PP +.P In some cases, the programmer must define a feature test macro in order to obtain the declaration of a system call from the header file specified |