add readme

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/README b/README
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+A command that lets you start another command with any argv[0].
+
+
+`exec-as bash -bash` will run the first program in $PATH
+named bash, and set argv[0] to -bash (making it a login
+shell.) You can add addition argument as needed.
+
+
+Note that to actually exec rather than then fork–exec:ing
+you need to type `exec exec-as` instead of `exec-as`, as
+the shell would otherwise fork first.
+