On 08/27/2011 04:33 PM, Marco van de Voort wrote:
Not all permission bits have constants predeclared. Michael and I checked
and Linux/FreeBSD/Darwin all have the upper bits declared like this:
#define S_ISUID 0004000 /* [XSI] set user id on execution */
#define S_ISGID 0002000 /* [XSI] set group id on execution
#define S_ISVTX 0001000 /* [XSI] directory restrcted delete
#define S_ISTXT S_ISVTX /* sticky bit: not supported */
Hereby a request to other "unix" port maintainers to check their headers
to see if your OS implements these constants. (Solaris and Haiku mainly I
guess, though the sleeping QNX and netwarelibc ports too I assume)
Note that the latter two are both the sticky bit, the TXT alias is the
original BSD symbol for it, the VTX declaration the current (XSI/POSIX)
name. Most manpages warn that the sticky bit is hardly implemented, so it is
probably less important than the other two.
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for netwlibc they are defined as follows:
{ POSIX setuid(), setgid(), and sticky... }
S_ISUID = $0800;
S_ISGID = $0400;
S_ISVTX = $0200;
S_ISTXT is not defined
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