From 058b0118a52061ad57694c01fc8763b22b789c4d Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Mon, 3 Jan 2005 06:40:20 +0000
Subject: Some man pages.

---
 man/man3/errstr.3 | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

(limited to 'man/man3/errstr.3')

diff --git a/man/man3/errstr.3 b/man/man3/errstr.3
index 1a888978..a0e6d3f0 100644
--- a/man/man3/errstr.3
+++ b/man/man3/errstr.3
@@ -73,13 +73,35 @@ a string to pass to
 The string returned from
 .I errstr
 is discarded.
+.PP
+The error string is maintained in parallel with the Unix
+error number
+.IR errno .
+Changing
+.I errno
+will reset the error string,
+and changing the error string via
+.I errstr
+or
+.I werrstr
+will reset
+.IR errno .
 .SH SOURCE
-.B /usr/local/plan9/src/libc/9syscall
-.br
-.B /usr/local/plan9/src/libc/9sys/werrstr.c
+.B /usr/local/plan9/src/lib9/errstr.c
 .SH DIAGNOSTICS
 .I Errstr
 always returns 0.
 .SH SEE ALSO
 .IR intro (3),
 .IR perror (3)
+.SH BUGS
+The implementation sets
+.I errno
+to the (somewhat arbitrary) 
+constant 0x19283745 when
+the error string is valid.
+When
+.I errno
+is set to other values, the error string
+is synthesized using
+.IR strerror (3).
-- 
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