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author | Sergey Poznyakoff <gray@gnu.org> | 2019-05-31 08:45:23 +0300 |
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committer | Sergey Poznyakoff <gray@gnu.org> | 2019-05-31 08:58:54 +0300 |
commit | 058f256a6f41fc9c36404b2e22580546e4f55b33 (patch) | |
tree | b6afde4271da1d92e5c10e1c50213c2fda7b2831 /doc | |
parent | ca38eef07ac3f9a4825f0046c1d373ed7b2f074b (diff) | |
download | pies-058f256a6f41fc9c36404b2e22580546e4f55b33.tar.gz pies-058f256a6f41fc9c36404b2e22580546e4f55b33.tar.bz2 |
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.
Diffstat (limited to 'doc')
-rw-r--r-- | doc/pies.texi | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/doc/pies.texi b/doc/pies.texi index 012ac88..1a798e1 100644 --- a/doc/pies.texi +++ b/doc/pies.texi @@ -176,7 +176,11 @@ foreground. Upon startup, @command{pies} reads the list of components from its configuration file, starts them, and remains in the -background, controlling their execution. +background, controlling their execution. Each component is +defined by the name of the external program to be run and its +arguments (command line). The program is normally run directly +(via @code{exec}), but you can instruct @command{pies} to run +it via @code{sh -c} as well. The standard output and standard error streams of a component can be redirected to a file or to an arbitrary @command{syslog} channel. @@ -870,6 +874,21 @@ their standard input to be open (e.g.@: @command{pppd nodetach}). Mark this component as @dfn{precious}. Precious components are never disabled by @command{pies}, even if they respawn too fast. +@kwindex shell +@item shell +Run command as @code{/bin/sh -c "$command"}. Use this flag if command +contains shell-specific features, such as I/O redirections, pipes, +variables or the like. You can change the shell program using the +@code{program} statement. For example, to use Korn shell: + +@example +component X @{ + flags shell; + program "/bin/ksh"; + command "myprog $HOME"; +@} +@end example + @kwindex wait @item wait This flag is valid only for @samp{inetd} components. It has the same |