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Editorial Team
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Asked: 2026-05-25T13:06:42+00:00

What is exactly the difference between commands exec(const char *c) and system(const char *c)

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What is exactly the difference between commands exec(const char *c) and system(const char *c) in unix based systems ?

Both can be called from a C program to execute system calls. Is there a difference b/w the two ?

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  1. Editorial Team

    exec replaces your process with the specified program. Your program is done, and will not continue running.

    spawn starts a new process (probably by first using fork), and runs the specified program while your program continues executing.

    system starts a new process (probably by first using fork), and runs the specified program while your program waits. Once the child exits, your program continues.

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