Add man page

Signed-off-by: Mattias Andrée <maandree@kth.se>

2 files changed, 32 insertions, 5 deletions

diff --git a/README b/README
index c168cdc..71a77bb 100644
--- a/README
+++ b/README
@@ -1,6 +1,15 @@
-A small program to prefixes the current time a line
-is written to its stdin.
+NAME
+	timeprefix - Prefix the current time to each line
 
-If you use this to generate log files, you can use
-`sort --merge` to create on log file from multiple
-log files.
+SYNOPSIS
+	timeprefix
+
+DESCRIPTION
+	timeprefix ignores all arguments. It reads stdin line by line
+	and prefix the current time (at the point the line has been
+	fully read) to each line and prints the prefixed line to stdout.
+
+	The timestamp is written in both decimal boot time and
+	human-readable real time (in UTC), with with boot time first so
+	that muliple generated log files can merged into one with
+	sort --merge.
diff --git a/timeprefix.1 b/timeprefix.1
new file mode 100644
index 0000000..aef997a
--- /dev/null
+++ b/timeprefix.1
@@ -0,0 +1,18 @@
+.TH TIMEPREFIX 1 TIMEPREFIX
+.SH NAME
+timeprefix \- Prefix the current time to each line
+.SH SYNOPSIS
+.B timeprefix
+.SH DESCRIPTION
+.B timeprefix
+ignores all arguments. It reads stdin line by line
+and prefix the current time (at the point the line
+has been fully read) to each line and prints the
+prefixed line to stdout.
+.PP
+The timestamp is written in both decimal boot time
+and human-readable real time (in UTC), with with
+boot time first so that muliple generated log files
+can merged into one with
+.B sort
+.BR --merge .