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ca2443b58c
This bug was first reported at <https://github.com/att/ast/issues/8>. The 'cd' command currently takes the value of $OLDPWD from the wrong scope. In the following example 'cd -' will change the directory to /bin instead of /tmp: $ OLDPWD=/bin ksh93 -c 'OLDPWD=/tmp cd -' /bin src/cmd/ksh93/bltins/cd_pwd.c: - Use sh_scoped() to obtain the correct value of $OLDPWD. - Fix a use-after-free bug. Make the 'oldpwd' variable a static char that points to freeable memory. Each time cd is used, this variable is freed if it points to a freeable memory address and isn't also a pointer to shp->pwd. src/cmd/ksh93/sh/path.c: path_pwd(): - Simplify and add comments. - Scope $PWD properly. src/cmd/ksh93/tests/builtins.sh, src/cmd/ksh93/tests/leaks.sh: - Backport the ksh2020 regression tests for 'cd -' when $OLDPWD is set. - Add test for $OLDPWD and $PWD after subshare. - Add test for $PWD after 'cd'. - Add test for possible memory leak. - Add testing for 'unset' on OLDPWD and PWD. src/cmd/ksh93/COMPATIBILITY: - Add compatibility note about changes to $PWD and $OLDPWD. Co-authored-by: Martijn Dekker <martijn@inlv.org> |
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| .. | ||
| args.c | ||
| arith.c | ||
| array.c | ||
| defs.c | ||
| deparse.c | ||
| expand.c | ||
| fault.c | ||
| fcin.c | ||
| init.c | ||
| io.c | ||
| jobs.c | ||
| lex.c | ||
| macro.c | ||
| main.c | ||
| name.c | ||
| nvdisc.c | ||
| nvtree.c | ||
| nvtype.c | ||
| parse.c | ||
| path.c | ||
| pmain.c | ||
| shcomp.c | ||
| streval.c | ||
| string.c | ||
| subshell.c | ||
| suid_exec.c | ||
| tdump.c | ||
| timers.c | ||
| trestore.c | ||
| waitevent.c | ||
| xec.c | ||