DOKK / manpages / debian 11 / libowfat-dev / case_lowers.3.en
case_lowers(3) Library Functions Manual case_lowers(3)

case_lowers - compare strings case-insensitively

#include <case.h>

void case_lowers(char* s);

case_lowers converts each 'A' to 'a', 'B' to 'b', ..., 'Z' to 'z' for each character in s until the first \0.

case_lowerb(3)