Revert "listen(): improve POSIX compliance"
This reverts commit 76e6e4d72f
.
Several programs in the tree use -1 instead of INT_MAX to use
the maximum value. Thanks to Eugene Grosbein for pointing this
out.
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@ -28,7 +28,7 @@
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.\" From: @(#)listen.2 8.2 (Berkeley) 12/11/93
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.\" $FreeBSD$
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.\"
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.Dd October 11, 2022
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.Dd April 14, 2020
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.Dt LISTEN 2
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.Os
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.Sh NAME
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@ -106,13 +106,10 @@ specifies a hard limit on
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.Fa backlog ;
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if a value greater than
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.Va kern.ipc.soacceptqueue
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is specified,
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or less than zero is specified,
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.Fa backlog
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is silently forced to
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.Va kern.ipc.soacceptqueue .
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If a negative value is used,
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.Fa backlog
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is silently forced to 0.
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.Pp
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If the listen queue overflows, the kernel will emit a LOG_DEBUG syslog message.
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The
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@ -194,8 +191,3 @@ The original
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is still available but hidden from a
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.Xr sysctl 3
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-a output so that existing applications and scripts continue to work.
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To improve POSIX compliance, a negative
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.Fa backlog
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argument is handled the same as 0.
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This was introduced in
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.Fx 14.0 .
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@ -1075,9 +1075,7 @@ solisten_proto(struct socket *so, int backlog)
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so->so_options |= SO_ACCEPTCONN;
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listening:
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if (backlog < 0)
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backlog = 0;
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if (backlog > somaxconn)
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if (backlog < 0 || backlog > somaxconn)
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backlog = somaxconn;
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so->sol_qlimit = backlog;
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