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Added `const' to types of sys_errlist and sys_nerr. 

Use .Va instead of .Fa to describe these variables.

Say a little about inconsistent declarations of sys_errlist in the BUGS
section.
This commit is contained in:
Bruce Evans 1996-04-19 14:02:03 +00:00
parent d83f3d7544
commit 6a59f3db1a
1 changed files with 10 additions and 5 deletions
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15
lib/libc/string/strerror.3
View File

@ -48,8 +48,8 @@
.Fd #include <stdio.h>
.Ft void
.Fn perror "const char *string"
.Vt extern char *sys_errlist[];
.Vt extern int sys_nerr;
.Vt extern const char * const sys_errlist[];
.Vt extern const int sys_nerr;
.Fd #include <string.h>
.Ft char *
.Fn strerror "int errnum"
@ -100,11 +100,11 @@ followed by the error number in decimal.
.Pp
The message strings can be accessed directly using the external
array
.Fa sys_errlist .
.Va sys_errlist .
The external value
.Fa sys_nerr
.Va sys_nerr
contains a count of the messages in
.Fa sys_errlist .
.Va sys_errlist .
The use of these variables is deprecated;
.Fn strerror
should be used instead.
@ -122,3 +122,8 @@ For unknown error numbers, the
.Fn strerror
function will return its result in a static buffer which
may be overwritten by subsequent calls.
.Pp
Programs that use the deprecated
.Va sys_errlist
variable often fail to compile because they declare it
inconsistently.