Can't change shell to cshell

nasridine · 02-28-2011, 12:45 PM

I was trying to change my shell from bash to csh by typing "csh" and got this error "if: Empty if." I figured it is because if and then do show up in the same line in the cshell source file. However there is no .cshrc in my home directory. I looked at the /etc/csh.cshrc and everything seems correct. No "empty if". Any suggestions?

xeleema · 02-28-2011, 12:54 PM

Greetingz!

I'm going to have a lil fun with this, so please forgive me

/me dons my best Drill Instructor voice
Everybody repeat after me: "This is my man command. There are many like it, but this one is important. I must read the man page before posting, or my post will show my noobies."

From "man csh"

Code:

       A login shell begins by executing commands from the system files /etc/csh.cshrc and /etc/csh.login.  It then exe-
       cutes commands from files in the user’s home directory: first ~/.tcshrc  (+)  or,  if  ~/.tcshrc  is  not  found,
       ~/.cshrc,  then  ~/.history  (or the value of the histfile shell variable), then ~/.login, and finally ~/.cshdirs
       (or the value of the dirsfile shell variable) (+).  The shell may read /etc/csh.login  before  instead  of  after
       /etc/csh.cshrc,  and  ~/.login  before instead of after ~/.tcshrc or ~/.cshrc and ~/.history, if so compiled; see
       the version shell variable. (+)

Check to see if the two files highlighted above exist on your system, and see what they contain.

nasridine · 02-28-2011, 01:18 PM

Quote:

Originally Posted by xeleema

Greetingz!

I'm going to have a lil fun with this, so please forgive me

/me dons my best Drill Instructor voice
Everybody repeat after me: "This is my man command. There are many like it, but this one is important. I must read the man page before posting, or my post will show my noobies."

From "man csh"

Code:

       A login shell begins by executing commands from the system files /etc/csh.cshrc and /etc/csh.login.  It then exe-
       cutes commands from files in the user’s home directory: first ~/.tcshrc  (+)  or,  if  ~/.tcshrc  is  not  found,
       ~/.cshrc,  then  ~/.history  (or the value of the histfile shell variable), then ~/.login, and finally ~/.cshdirs
       (or the value of the dirsfile shell variable) (+).  The shell may read /etc/csh.login  before  instead  of  after
       /etc/csh.cshrc,  and  ~/.login  before instead of after ~/.tcshrc or ~/.cshrc and ~/.history, if so compiled; see
       the version shell variable. (+)

Check to see if the two files highlighted above exist on your system, and see what they contain.

Only two of the files you mentioned exist in my system. /etc/csh.cshrc and /etc/csh.login. It seems to me all the if-then's are in the same line.
Attached is the content of the two files. I never used csh on this machine, so I don't think these files have ever been touched.
/etc/csh.login

Code:

# /etc/cshrc
#
# csh configuration for all shell invocations.

# By default, we want this to get set.
# Even for non-interactive, non-login shells.
if ($uid > 99 && "`id -gn`" == "`id -un`") then
    umask 002
else
    umask 022
endif

if ($?prompt) then
  if ($?tcsh) then
    set promptchars='$#'
    set prompt=\[$user'@%m %c]%# ' 
  else
    set prompt=\[$user@`hostname -s`\]\$\ 
  endif
endif

if ( $?tcsh ) then
        bindkey "^[[3~" delete-char
endif

bindkey "^R" i-search-back
set echo_style = both
set histdup = erase
set savehist = (1024 merge)
setenv MAIL "/var/spool/mail/$USER"
limit coredumpsize 0

# Check if we aren't a loginshell and do stuff if we aren't
if (! $?loginsh) then
    if ( -d /etc/profile.d ) then
        set nonomatch
        foreach i ( /etc/profile.d/*.csh )
            if ( -r $i ) then
                if ($?prompt) then
                    source $i
                else
                    source $i >&/dev/null
                endif
            endif
        end
        unset i nonomatch
    endif
endif

/etc/csh.login

Code:

# /etc/csh.login

# System wide environment and startup programs, for login setup

if ($?PATH) then
        if ( "${path}" !~ */usr/X11R6/bin* ) then
                setenv PATH "${PATH}:/usr/X11R6/bin"
        endif
else
        if ( $uid == 0 ) then
                setenv PATH "/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin"
        else
                setenv PATH "/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin"
        endif
endif

setenv HOSTNAME `/bin/hostname`
set history=1000

if ( ! -f $HOME/.inputrc ) then
        setenv INPUTRC /etc/inputrc
endif

if ( -d /etc/profile.d ) then
        set nonomatch
        foreach i ( /etc/profile.d/*.csh )
                if ( -r $i ) then
                                if ($?prompt) then
                                      source $i
                                else
                                      source $i >& /dev/null
                                endif
                endif
        end
        unset i nonomatch
endif


# Set umask consistently with bash for loginshells (csh.login sourced
# after csh.cshrc unlike with bash profile/bashrc scripts and umask
# might be modified in profile.d csh scripts)
if ($?loginsh) then
  if ($uid > 99 && "`id -gn`" == "`id -un`") then
      umask 002
  else
      umask 022
  endif
endif