mirror of
git://git.code.sf.net/p/cdesktopenv/code
synced 2025-03-09 15:50:02 +00:00
40b2c3c3d4
The code used to fork subshells when creating/changing aliases will
always fork, even when the alias tree isn't changed:
$ echo $(unalias --man 2> /dev/null; echo $$ ${.sh.pid})
375097 375107
$ alias foo=bar; echo $(alias -p foo; echo $$ ${.sh.pid})
alias foo=bar 375097 375110
This is a bit inefficient, so this commit avoids forking a subshell
unless at least one change is made to the alias table.
src/cmd/ksh93/bltins/typeset.c:
- b_alias(), b_unalias(): Remove sh_subfork() calls.
- setall(): When creating an alias (name contains '='), fork a
virtual subshell before calling nv_open() to add the node.
- unall():
- When unsetting all aliases (-a), fork subshell before dtclear().
- When unsetting one alias, fork subshell before nv_delete().
- Move sh_pushcontext() and sh_popcontext() expansions so that
sh_subfork() is not in between them, as that would cause
program flow corruption or a crash.
Co-authored-by: Martijn Dekker <martijn@inlv.org>
|
||
|---|---|---|
| .. | ||
| alarm.c | ||
| cd_pwd.c | ||
| cflow.c | ||
| enum.c | ||
| getopts.c | ||
| hist.c | ||
| misc.c | ||
| mkservice.c | ||
| print.c | ||
| read.c | ||
| regress.c | ||
| sleep.c | ||
| test.c | ||
| trap.c | ||
| typeset.c | ||
| ulimit.c | ||
| umask.c | ||
| whence.c | ||