IS_ABLE

Section: User Commands (1)
Updated: Jan 4, 1991
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NAME

is_able - Check for write/read-ability of a file.

SYNOPSIS

is_able file {w|g|S|s} {r|w|s|B|b}

DESCRIPTION

is_able can check a file to see if a file is either write/read-able by group or by all, or if it is setuid/setgid, or a combination of these. A first argument of "w" or "g" determines whether it is to be world or group writable, respectively, a "s" or "S" allows checking of SUID or SGID files, respectively. A second argument of "r", "w", or "s", stands for readability, writeability, or set[ug]id-ness, respectively; a "B" and a "b" stand for read and write, and set[ug]id and write, respectively. is_able with a write option also checks the parent directories, if a complete path is given, for writeability.

BUGS

The Andrew File System, or Mach, or the combination of the two, apparently plays games with stat(), the way I get the file info, so it can report things as writable, when they aren't.

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Time: 23:44:35 GMT, February 06, 2023