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syscall LIST

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syscall LIST
Calls the system call specified as the first element of the list, passing the remaining elements as arguments to the system call. If unimplemented, produces a fatal error. The arguments are interpreted as follows: if a given argument is numeric, the argument is passed as an int. If not, the pointer to the string value is passed. You are responsible to make sure a string is pre-extended long enough to receive any result that might be written into a string. If your integer arguments are not literals and have never been interpreted in a numeric context, you may need to add 0 to them to force them to look like numbers.

    require 'syscall.ph';               # may need to run h2ph
    syscall(&SYS_write, fileno(STDOUT), "hi there\n", 9);

Note that Perl supports passing of up to only 14 arguments to your system call, which in practice should usually suffice.

Source: Perl builtin functions
Copyright: Larry Wall, et al.

Previous: symlink OLDFILE,NEWFILE

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