X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsd_is_fifo.xml;h=17ecca833672be4c9c915eba1a9915ba14cf86cb;hb=c34255bdb217c2a1d3ac6348252437ab8be9ca46;hp=2bc860c373adccc371a875abb8612952ee0086a9;hpb=79640424059328268b9fb6c5fa8eb777b27a177e;p=elogind.git
diff --git a/man/sd_is_fifo.xml b/man/sd_is_fifo.xml
index 2bc860c37..17ecca833 100644
--- a/man/sd_is_fifo.xml
+++ b/man/sd_is_fifo.xml
@@ -21,7 +21,8 @@
along with systemd; If not, see .
-->
-
+
sd_is_fifo
@@ -48,6 +49,7 @@
sd_is_socket_inet
sd_is_socket_unix
sd_is_mq
+ sd_is_special
Check the type of a file descriptor
@@ -83,7 +85,7 @@
int fd
int type
int listening
- const char* path
+ const char *path
size_t length
@@ -93,6 +95,12 @@
const char *path
+
+ int sd_is_special
+ int fd
+ const char *path
+
+
@@ -153,6 +161,16 @@
path parameter is not
NULL, it is checked whether the
message queue is bound to the specified name.
+
+ sd_is_special() may be
+ called to check whether the specified file descriptor
+ refers to a special file. If the
+ path parameter is not
+ NULL, it is checked whether the file
+ descriptor is bound to the specified file
+ name. Special files in this context are character
+ device nodes and files in /proc
+ or /sys.
@@ -168,41 +186,12 @@
Notes
- These functions are provided by the reference
- implementation of APIs for new-style daemons and
- distributed with the systemd package. The algorithms
- they implement are simple, and they can easily be
- reimplemented in daemons if it is important to support
- this interface without using the reference
- implementation.
+
Internally, these function use a combination of
fstat() and
getsockname() to check the file
descriptor type and where it is bound to.
-
- For details about the algorithms, check the
- liberally licensed reference implementation sources:
-
- and
-
- sd_is_fifo() and the
- related functions are implemented in the reference
- implementation's sd-daemon.c and
- sd-daemon.h files. These
- interfaces are available as shared library, which can
- be compiled and linked to with the
- libsystemd-daemon pkg-config1
- file. Alternatively, applications consuming these APIs
- may copy the implementation into their source
- tree. For more details about the reference
- implementation see
- sd-daemon3.
-
- These functions continue to work as described,
- even if -DDISABLE_SYSTEMD is set during
- compilation.