test errnum and abort NAME assert_perror - test errnum and abort LIBRARY Standard C library (...test whether a process is in a group NAME group_member - test whether a process is in a group...test for whitespace wide character NAME iswblank - test for whitespace wide character LIBRARY...test file type of a file descriptor NAME isfdtype - test file type of a file descriptor LIBRAR...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...floating-point relational tests without exception for NaN NAME isgreater, isgreaterequal, isless, islessequal, islessgre...test for initial shift state NAME mbsinit - test for initial shift state LIBRARY Standard C li...test for printing wide character NAME iswprint - test for printing wide character LIBRARY Stan...test whether a file descriptor refers to a terminal NAME isatty - test whether a file descript...test for control wide character NAME iswcntrl - test for control wide character LIBRARY Standa...test for whitespace wide character NAME iswspace - test for whitespace wide character LIBRARY...test for graphic wide character NAME iswgraph - test for graphic wide character LIBRARY Standa...test for hexadecimal digit wide character NAME iswxdigit - test for hexadecimal digit wide cha...test for punctuation or symbolic wide character NAME iswpunct - test for punctuation or symbol...test for decimal digit wide character NAME iswdigit - test for decimal digit wide character LI...test for alphabetic wide character NAME iswalpha - test for alphabetic wide character LIBRARY...