Implement find_my_exec()'s path normalization using realpath(3). Replace the symlink-chasing logic in find_my_exec with realpath(3), which has been required by POSIX since SUSv2. (Windows lacks realpath(), but there we can use _fullpath() which is functionally equivalent.) The main benefit of this is that -- on all modern platforms at least -- realpath() avoids the chdir() shenanigans we used to perform while interpreting symlinks. That had various corner-case failure modes so it's good to get rid of it.
There is still ongoing discussion about whether we could skip the replacement of symlinks in some cases, but that's really matter for a separate patch. Meanwhile I want to push this before we get too close to feature freeze, so that we can find out if there are showstopper portability issues. Discussion: https://postgr.es/m/797232.1662075...@sss.pgh.pa.us Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/11a0a8b529caeab101206ec4a33af95bb4445746 Modified Files -------------- src/common/exec.c | 206 ++++++++++++++++++++++++------------------------------ 1 file changed, 91 insertions(+), 115 deletions(-)
