I want to check if a command is builtin or a separate program.
In sh and bash I use:
$ type <command>
What is the equivalent in csh?
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csh has "which" (which cannot detect sh aliases)
In my environment using tcsh
~ (101) alias
cd cd !* ; ls
q exit
v cursor; xhost + ;resize -s 40 80; unsetenv TERMCAP; screen
xl xlock -nolock -random
y Xearth; run xclock -geometry +1100+0; run nice xload -geometry +950+0 -update 3
~ (102) which y
y: aliased to Xearth; run xclock -geometry +1100+0; run nice xload -geometry +950+0 -update 3
~ (103) type which
type: Command not found.
~ (104) which which
which: shell built-in command.
~ (105) which ls
/bin/ls
~ (106)
answered Aug 12 '16 at 22:45
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In the version
cshon my system,type whichshows thatwhich is /usr/bin/whichand not a builtin, socshdoes in fact not have it. It's a system binary. So YMMV on this. – DopeGhoti Aug 12 '16 at 22:46 -
If you're using something with Linux or BSDs (including OSX), odds are that you're using tcsh. Solaris uses "csh" from the early 1980s, and behaves as you indicate. – Thomas Dickey Aug 12 '16 at 22:49
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Actually, the
/usr/bin/typeon xyr system is a shell script that uses the Almquist shell as its interpreter. Xe is thereby running the Almquist shell's builtintypecommand and seeing what is built into, and external to, the Almquist shell, rather than the TENEX C shell. This is part of what's so tricky about the wholewhich/where/whence/whereis/type/command -vmess. – JdeBP Aug 13 '16 at 8:38
Simply trying this shows:
$ csh
% type type
type is a shell builtin
So.. yes, you can?
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2what version? It works for me in both
cshandtcsh.tcsh 6.18.01 (Astron) 2012-02-14 (x86_64-apple-darwin) options wide,nls,dl,al,kan,sm,rh,color,filec– DopeGhoti Aug 12 '16 at 22:47 -
3Ironically, what's confusing you is the mirror image of what you said to M. Dickey. On your system, the
typecommand is an external command as far as the TENEX C shell is concerned:/usr/bin/type. That external command is a small script that invokes the Almquist's shell's builtintypecommand, which prints the message "is a shell builtin". The TENEX C shell would write "shell built-in command". – JdeBP Aug 13 '16 at 8:26
