How do you execute one program from within another? Ans. The system calls used for low-level process creation are 'execlp()' and 'execvp()'. The 'execlp()' call overlays the existing program with the new one, runs that and exits. The original program gets back control only when an error occurs. execlp(path,file_name,arguments..); //last argument must be NULL A variant of 'execlp()' called 'execvp()' is used when the number of arguments is not known in advance. execvp(path,argument_array); //argument array should be terminated by NULL

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Ashish Verma

01 Jan 1970 05:30 AM study24x7

How do you execute one program from within another? Ans. The system calls used for low-level process creation are "execlp()" and "execvp()". The "execlp()" call overlays the existing program with the new one, runs that and exits. The original program gets back control only when ...

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