4.4BSD snapshot (revision 8.1); add 1993 to copyright

don't leak memory; bug report net2/lib/0; KNF

don't use snprintf(3) here, exec shouldn't require stdio(3).
also, if a component of the path is too long, complain violently.

execvp has to do ENOEXEC recovery even if `/' in the path
when using the interpreter, lose the first argument

init argv, used by realloc

Ruin Keith's finely crafted ANSI C code to make it compile with PCC.

redo all the exec routines from scratch in C (well, ANSI C)
changed path to look at "." last
don't let execlp/execvp ignore execve errors
changed name from execvp.c to exec.c

Changes to accommodate prototype declarations.

fix for ANSI C

added LIBC_SCCS condition for sccs ids

Add copyright

remove use of '-' as pathname delimiter

date and time created 80/12/21 16:39:39 by wnj