C-string.h-APIs

API name	API description
strlen	calculate the length of a string
strcat	concatenate two strings
strncat	concatenate two strings
strlcat	size-bounded string concatenation
strcmp	compare two strings
strncmp	compare part of two strings
strchr	string scanning operation
strrchr	string scanning operation
strchrnul	string scanning operation
strstr	find a substring
strcasestr	find a substring
strcasecmp	case-insensitive string comparisons
strpbrk	scan a string for a byte
strsep	extract token from string
strspn	get length of a substring
strtok	split string into tokens
strtok_r	split string into tokens
strcpy	copy a string and return a pointer to the end of the result
strncpy	copy fixed length string, returning a pointer to the array end
strlcpy	size-bounded string copying
stpcpy	copy a string and return a pointer to the end of the result
strcoll	string comparison using collating information
strcspn	get the length of a complementary substring
strdup	duplicate a specific number of bytes from a string
strndup	duplicate a specific number of bytes from a string
strfry	randomize a string
strxfrm	string transformation