diff options
Diffstat (limited to 'bin/sh')
| -rw-r--r-- | bin/sh/sh.1 | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/bin/sh/sh.1 b/bin/sh/sh.1 index df6b626b..6fa59ed 100644 --- a/bin/sh/sh.1 +++ b/bin/sh/sh.1 @@ -32,7 +32,7 @@ .\" from: @(#)sh.1 8.6 (Berkeley) 5/4/95 .\" $FreeBSD$ .\" -.Dd December 4, 2005 +.Dd December 8, 2005 .Dt SH 1 .Os .Sh NAME @@ -1957,6 +1957,7 @@ The first output line shows the user and system times for the shell itself, the second one contains the user and system times for the children. .It Ic trap Oo Ar action Oc Ar signal ... +.It Ic trap Fl l Cause the shell to parse and execute .Ar action when any specified @@ -1968,14 +1969,25 @@ In addition, the pseudo-signal may be used to specify an action that is performed when the shell terminates. The .Ar action -may be null or omitted; +may be an empty string or a dash +.Pq Ar - ; the former causes the specified signal to be ignored and the latter causes the default action to be taken. +Omitting the +.Ar action +is another way to request the default action, for compatibility reasons this +usage is not recommended though. When the shell forks off a subshell, it resets trapped (but not ignored) signals to the default action. The .Ic trap command has no effect on signals that were ignored on entry to the shell. +.Pp +Option +.Fl l +causes the +.Ic trap +command to display a list of valid signal names. .It Ic type Op Ar name ... Interpret each .Ar name |
