When the busybox is used as /sbin/init and the inittab file contains
below:
::respawn:-/bin/sh
/sbin/init spawns hush for the first time with the argv[0] contains '-',
and hush treats it as login shell. Then it reads /etc/profile and if
the file contains the command execution like below, it invokes hush as
login shell because the argv[0] argument is still '-/bin/sh' and reads
/etc/profile again. This will last until some failure (e.g., memory
failure) happens.
[ "$(id -u)" -eq 0 ] && PS1="${PS1}# " || PS1="${PS1}\$ "
This commit fixes this issues by adding an offset (+1) to the
G.argv0_for_re_execing variable.
This issue happens on our out-of-tree UML (use mode linux) with nommu
configuration.
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Hajime Tazaki <[email protected]>
---
shell/hush.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/shell/hush.c b/shell/hush.c
index 04dda0734..cd00a9a41 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -10361,6 +10361,8 @@ int hush_main(int argc, char **argv)
_exit(0);
}
G.argv0_for_re_execing = argv[0];
+ if (G.argv0_for_re_execing[0] == '-')
+ G.argv0_for_re_execing += 1;
#endif
#if ENABLE_HUSH_TRAP
# if ENABLE_HUSH_FUNCTIONS
--
2.43.0
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