43 lines
1.3 KiB
Groff
43 lines
1.3 KiB
Groff
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.TH GETPEEREID 2
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.SH NAME
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getpeereid \- get the effective user ID and effective group ID of a peer
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connected through a Unix domain socket.
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.SH SYNOPSIS
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.ft B
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#include <sys/socket.h>
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.in +5
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.ti -5
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int getpeereid(int \fIsd\fP, uid_t *\fIeuid\fP, gid_t *\fIegid\fP);
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.br
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.ft P
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.SH DESCRIPTION
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getpeereid() is often used to authenticate clients connecting to a
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server through a Unix domain socket. The server can call this function
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with a socket descriptor \fIsd\fP and this function will fill\-in
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\fIeuid\fP and \fIegid\fP with the effective user ID and the effective
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group ID of the client process.
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.SH RETURN VALUES
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On success, this function returns 0, \fIeuid\fP is set to the effective
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user ID of the peer connected through Unix domain socket \fIsd\fP, and
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\fIegid\fP is set to the effective group ID of the peer connected
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through Unix domain socket \fIsd\fP. On error, -1 is returned and
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\fIerrno\fP is set.
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.SH ERRORS
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.TP 15
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[EBADF]
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The argument \fIsd\fP is not a descriptor.
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.TP 15
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[ENOTSOCK]
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The argument \fIsd\fP is a descriptor, but not a socket descriptor.
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.TP 15
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[EFAULT]
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The address pointed to by \fIeuid\fP and/or \fIegid\fP is not in a
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valid part of the process address space.
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.SH SEE ALSO
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.BR socket(2),
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.BR socketpair(2),
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.BR unix(8)
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.SH HISTORY
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This function first appeared in Minix 3.1.8.
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