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46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
NAME
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system - issue a shell command
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SYNOPSIS
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system(cmd)
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TYPES
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cmd str
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return int
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DESCRIPTION
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This function excutes the shell command found in the srtring, cmd.
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The return value is system dependent. On POSIX P1003.1 compliant
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systems the return value is defined by the waitpid system call.
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Typically a shell command that returns with a 0 exit status will
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cause this function to return a 0 value. On some systems, a shell
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command that returns with an exit status of e will cause this
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function to return e*256. Core dumps, termination due to signals
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and other waitpid values will change the return value.
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On POSIX P1003.1 compliant systems, if cmd is empty then this function
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will determine if the shell is executable. If the shell is executable,
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0 is returned otherwise non-zero is returned.
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EXAMPLE
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> system("")
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0
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> system("true")
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0
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> system("exit 2")
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512
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> system("date")
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Sun Jul 9 03:21:48 PDT 1995
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0
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LIMITS
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none
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LIBRARY
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none
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SEE ALSO
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XXX - fill in
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