Provide an option to run commands via sh -c

The new flag "shell" instructs pies to run the command marked with it
as '/bin/sh -c $command'. Alternative shell can be supplied ising the
'program' statement.

This is useful if the command line uses shell-specific features (command
or variable expansion, redirection, pipes, etc.)

This commit also fixes a bug in the 'env' statement handling: a single
argument with embedded whitespaces was undergoing word splitting and
thus incorrectly handled as multiple arguments.

* NEWS: Document changes.
* doc/pies.texi: Likewise.
* src/comp.c (component_free): Free command.
(component_finish): Split command into argv/argc as directed by the
CF_SHELL flag.
* src/pies.c (_cb_command): Remove. Functionality moved to
component_finish().
(_cb_env): Bugfix. Don't split arguments.
* src/pies.h (CF_SHELL): New flag.
(component) <command>: New member.

* tests/Makefile.am: Add new tests.
* tests/testsuite.at: Add new tests.
* tests/aux/respawn: Change default timeout to 1 second.
* tests/respawn.at: Minor change.
* tests/shell.at: New test.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/respawn.at b/tests/respawn.at
index 4a8e3a7..6b51ca6 100644
--- a/tests/respawn.at
+++ b/tests/respawn.at
@@ -34,7 +34,7 @@ while :
 do
     if test -f $comp_pid_file; then
         lines=`wc -l $comp_pid_file | awk '{print $1}'`
-        if test "$lines" -ge 3 ; then
+        if test "$lines" -ge 2 ; then
             break
         fi
     fi