which:general.lib is it really useful or obsolete?

[gorzel]

The proc which only displays the result of the unix-cmd which

by calling system("sh","which ..) but does not return it as a string.

The proc is never used in any library, and everybody can call the system-cmd directly.

Moreover,

system("Singular")
    returns the absolute (path) name of the running SINGULAR as string. 

So, is there a need for such a proc ?

[seelisch]

obselete after enhancements by Hans; write e.g.

string s = read("|: which gcc");

to obtain path to gcc in string s