From f316a2ed52195135a35e32d7096e876357c48c69 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Thu, 18 Sep 2014 20:03:23 +0000 Subject: initial commit: rc for execline-2.0.0.0 --- doc/ifthenelse.html | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 doc/ifthenelse.html (limited to 'doc/ifthenelse.html') diff --git a/doc/ifthenelse.html b/doc/ifthenelse.html new file mode 100644 index 0000000..3180412 --- /dev/null +++ b/doc/ifthenelse.html @@ -0,0 +1,59 @@ + + + + + execline: the ifthenelse command + + + + + + +

+execline
+Software
+skarnet.org +

+ +

The `ifthenelse` program

+ +

+ifthenelse performs a conditional alternative. +

+ +

Interface

+ +

+ In an execlineb script: +

+ +

+     ifthenelse [ -X ] [ -s ] { progif... } { progthen... } { progelse... } prog...
+

+ +

ifthenelse reads +progif..., progthen... and progelse... in 3 +consecutive blocks.
ifthenelse runs progif... as a child process +and waits for it to complete.
If progif... crashes (i.e. is killed by a signal), ifthenelse +exits 1 with an error message.
If progif... exits zero, ifthenelse runs +progthen... as a child process, else it runs progelse....
ifthenelse waits for its child to complete and puts the exit +status in the ? environment variable. It then +execs into prog....

+ +

Options

+ +

-X : if progif crashes, do not exit; proceed +as if it had returned false.
-s : magic scoping hack. This option does powerful but +ugly things, and is left undocumented on purpose.

+ + + -- cgit v1.2.3

The ifthenelse program

Interface

Options

The `ifthenelse` program