diff options
Diffstat (limited to 'man5/services.5')
| -rw-r--r-- | man5/services.5 | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/man5/services.5 b/man5/services.5 index 5003f61..eb83b3e 100644 --- a/man5/services.5 +++ b/man5/services.5 @@ -11,7 +11,7 @@ .\" Thu Jan 11 12:14:41 1996 Austin Donnelly <and1000@cam.ac.uk> .\" * Merged two services(5) manpages .\" -.TH services 5 2022-10-30 "Linux man-pages 6.05.01" +.TH services 5 2023-10-31 "Linux man-pages 6.7" .SH NAME services \- Internet network services list .SH DESCRIPTION @@ -29,13 +29,13 @@ The C library routines and .BR endservent (3) support querying this file from programs. -.PP +.P Port numbers are assigned by the IANA (Internet Assigned Numbers Authority), and their current policy is to assign both TCP and UDP protocols when assigning a port number. Therefore, most entries will have two entries, even for TCP-only services. -.PP +.P Port numbers below 1024 (so-called "low numbered" ports) can be bound to only by root (see .BR bind (2), @@ -47,7 +47,7 @@ that the service running on the port is the standard implementation, and not a rogue service run by a user of the machine. Well-known port numbers specified by the IANA are normally located in this root-only space. -.PP +.P The presence of an entry for a service in the .B services file does not necessarily mean that the service is currently running @@ -62,7 +62,7 @@ and so won't appear in .BR inetd.conf (5). In particular, news (NNTP) and mail (SMTP) servers are often initialized from the system boot scripts. -.PP +.P The location of the .B services file is defined by @@ -71,7 +71,7 @@ in .IR <netdb.h> "." This is usually set to .IR /etc/services "." -.PP +.P Each line describes one service, and is of the form: .IP \f2service-name\ \ \ port\f3/\f2protocol\ \ \ \f1[\f2aliases ...\f1] @@ -103,13 +103,13 @@ is an optional space or tab separated list of other names for this service. Again, the names are case sensitive. -.PP +.P Either spaces or tabs may be used to separate the fields. -.PP +.P Comments are started by the hash sign (#) and continue until the end of the line. Blank lines are skipped. -.PP +.P The .I service-name should begin in the first column of the file, since leading spaces are @@ -120,7 +120,7 @@ However, a conservative choice of characters should be used to minimize compatibility problems. For example, a\-z, 0\-9, and hyphen (\-) would seem a sensible choice. -.PP +.P Lines not matching this format should not be present in the file. (Currently, they are silently skipped by @@ -129,7 +129,7 @@ file. and .BR getservbyport (3). However, this behavior should not be relied on.) -.PP +.P .\" The following is not true as at glibc 2.8 (a line with a comma is .\" ignored by getservent()); it's not clear if/when it was ever true. .\" As a backward compatibility feature, the slash (/) between the @@ -142,11 +142,11 @@ However, this behavior should not be relied on.) .\" This file might be distributed over a network using a network-wide naming service like Yellow Pages/NIS or BIND/Hesiod. -.PP +.P A sample .B services file might look like this: -.PP +.P .in +4n .EX netstat 15/tcp @@ -195,5 +195,5 @@ Definition of .BR inetd.conf (5), .BR protocols (5), .BR inetd (8) -.PP +.P Assigned Numbers RFC, most recently RFC\ 1700, (AKA STD0002). |