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sh: fix FEATURE_SH_STANDALONE help text: it does not enable NOFORK

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-26 18:31:51 +01:00
parent 9967c9949e
commit 786c9dc0c1
1 changed files with 4 additions and 16 deletions
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20
shell/Config.src
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@ -121,23 +121,11 @@ config FEATURE_SH_STANDALONE
for use as a rescue shell, in the event that you screw up your system.
This is implemented by re-execing /proc/self/exe (typically)
with right parameters. Some selected applets ("NOFORK" applets)
can even be executed without creating new process.
Instead, busybox will call <applet>_main() internally.
with right parameters.
However, this causes problems in chroot jails without mounted /proc
and with ps/top (command name can be shown as 'exe' for applets
started this way).
# untrue?
# Note that this will *also* cause applets to take precedence
# over shell builtins of the same name. So turning this on will
# eliminate any performance gained by turning on the builtin "echo"
# and "test" commands in ash.
# untrue?
# Note that when using this option, the shell will attempt to directly
# run '/bin/busybox'. If you do not have the busybox binary sitting in
# that exact location with that exact name, this option will not work at
# all.
However, there are drawbacks: it is problematic in chroot jails without
mounted /proc, and ps/top may show command name as 'exe' for applets
started this way.
config FEATURE_SH_NOFORK
bool "Run 'nofork' applets directly"