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USupported on UNIX
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VSupported on OpenVMS
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xcall EXEC(program[, argument, ...])
Arguments
program
An expression that contains the name of the program to execute. (a)
argument
(optional) One or more variables or literals that contain any arguments the program requires. A maximum of 31 arguments is allowed. (a or n)
Discussion
The EXEC subroutine terminates the calling Synergy program and executes a non-Synergy program using the execvp function call. On OpenVMS, you must set the logical VAXC$PATH to a search list where the program image will be found.
The EXEC subroutine performs the same cleanup as the STOP command. In effect, EXEC acts as a chain to a non-Synergy program, including shell scripts. You cannot return from a successful EXEC.
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Do not use this routine in an ELB that is being used with xfServerPlus. |
Examples
The example below executes the program /usr/games/rogue with -s as an argument. Note that the WRITES statement is only executed if the EXEC subroutine fails.
.define TTCHN ,1
record
program ,a*, "/usr/games/rogue"
arg1 ,a*, "-s"
proc
open(TTCHN, o, "tt:")
onerror nope
xcall exec(program, arg1)
nope,
writes(TTCHN, "Cannot execute: " + program)
stop
end
