gawk: Updating ERRNO
16.4.7 Updating 'ERRNO'
-----------------------
The following functions allow you to update the 'ERRNO' variable:
'void update_ERRNO_int(int errno_val);'
Set 'ERRNO' to the string equivalent of the error code in
'errno_val'. The value should be one of the defined error codes in
'<errno.h>', and 'gawk' turns it into a (possibly translated)
string using the C 'strerror()' function.
'void update_ERRNO_string(const char *string);'
Set 'ERRNO' directly to the string value of 'ERRNO'. 'gawk' makes
a copy of the value of 'string'.
'void unset_ERRNO(void);'
Unset 'ERRNO'.
Info Catalog
gawk: Printing Messages
gawk: Extension API Description
gawk: Requesting Values