Description of problem:
=======================
/usr/bin/which fails for long path

Version-Release number of selected component (if applicable):
which-2.21-17.el8.x86_64

How reproducible:
====================
Steps to Reproduce:
-------------------
1. Create Directory with long path
      # mkdir -p /tmp/1111111111222222222233333333334444444444555555555566666666667777777777888888888899999999990000000000/1111111111222222222233333333334444444444555555555566666666667777777777888888888899999999990000000000/11111111112222222222333333333344444444445555555555

2. Change directory to the created one
     # cd !$

3. Execute which command 
     # which cd

Actual results:
=================
Fails with error:
Can't get current working directory

Expected results:
===================
Should show below results
$ which cd
/usr/bin/cd


Additional info:
=================
In RHEL 7,8 and 9)
-------------------
The buffer is 256 in which.c

static char home[256];
static char cwd[256];
  static char result[256];