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Annotation of coherent/b/bin/sh.420/Changes2, revision 1.1.1.1

1.1       root        1: Fri Jul 10 22:45:42 1992 PDT
                      2:                V3.3.3: extensive changes to implement shell functions,
                      3:                as per specification provided by hal.
                      4: sh.h
                      5:                Added tokens NFUNC, NRET and shell function type SHFUNC.
                      6:                Added declarations for globals sh_fnp, in_sh_fn, ret_done.
                      7: sh.y
                      8:                Added tokens _PARENS and _RET and syntax for return
                      9:                and shell functions.
                     10: lex.c
                     11:                Added "return" (_RET) and "()" (_PARENS).
                     12: extern.c
                     13:                Added globals sh_fnp, in_sh_fn, ret_done.
                     14: exec1.c
                     15:                In command(), added cases NFUNC (shell function definitions)
                     16:                and NRET (return) and ret_done references to change control
                     17:                flow after return.  Added call to sh_fn() to look for shell
                     18:                function calls.
                     19: exec2.c
                     20:                In clone(), reset global sh_fnp to NULL in child so that
                     21:                forked processes do not inherit shell functions.
                     22: exec3.c
                     23:                Added code to implement shell function definition and execution.
                     24:                lookup_sh_fn() looks up a shell function name,
                     25:                def_sh_fn() defines a shell function, and
                     26:                sh_fn() executes a shell function if appropriate.
                     27:                Auxilliary routines copy_node() and free_node() do
                     28:                the messiest part of the job.
                     29: 
                     30: Tue Jul 14 15:06:56 1992 PDT
                     31: sh.h
                     32:                Redefined NODE so that -VSINU compilation is no longer required.
                     33: lex.c
                     34:                Added hashing to keyword lookup.
                     35: 
                     36: Mon Mar 22 11:25:47 1993 PST
                     37: exec1.c
                     38:                Integrated changes from non-function version, cf. sh/Changes.
                     39: 
                     40: Fri May  7 05:34:29 1993 PDT
                     41: exec3.c
                     42:                V4.0.5: In sh_fn, added code to save and restore sesp->s_con.
                     43:                michael discovered that a shell function called from ANDAND
                     44:                within a while-loop caused the old version to core dump.
                     45:                The modified version essentially runs the shell function
                     46:                in its own "break/continue" context, then restores the previous
                     47:                "break/continue" context.

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