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5.1.148 status
Syntax:
status ( link_expression, string_expression )
Type:
- string
Syntax:
status ( link_expression, string_expression, string_expression )
Type:
- int
Purpose:
- returns the status of the link as asked for by the second argument. If
a third argument is given, the result of the comparison to the status
string is returned:
(status(l,s1)==s2) is equivalent to
status(l,s1,s2) .
The following string expressions are allowed:
"name"
- the name string given by the definition of the link (usually the filename)
"type"
- returns
"ASCII" , "DBM" or "ssi"
"open"
- returns
"yes" or "no"
"openread"
- returns
"yes" or "no"
"openwrite"
- returns
"yes" or "no"
"read"
- returns
"ready" or "not ready"
"write"
- returns
"ready" or "not ready"
"mode"
- returns (depending on the type of the link and its status)
"","w","a","r" or "rw"
"exists"
- returns
"yes" or "no" : existence of the filename for ASCII/ssi links
Syntax:
status ( list_expression, int_expression )
Type:
- int
Purpose:
- the list should be a list L of links, the second argument a timeout in 1/10 seconds.
Returns
-2
- select returns an error
-1
- all links are closed/at eof
0
- timeout
>0
- (at least) L[i] is ready
Example:
| link l=":w example.txt";
status(l,"write");
==> not ready
open(l);
status(l,"write","ready");
==> 1
close(l);
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See
link;
open;
read;
write.
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