STRSTR(3) NetBSD Library Functions Manual STRSTR(3)
strstr, strcasestr, strnstr -- locate a substring in a string
Standard C Library (libc, -lc)
#include <string.h> char * strstr(const char *big, const char *little); char * strcasestr(const char *big, const char *little); char * strnstr(const char *big, const char *little, size_t len);
The strstr() function locates the first occurrence of the nul-terminated string little in the nul-terminated string big. The strcasestr() function is similar to strstr(), but ignores the case of both strings. The strnstr() function locates the first occurrence of the NUL-terminated string little in the string big, where not more than len characters are searched. Characters that appear after a `\0' character are not searched. Since the strnstr() function is a NetBSD specific API, it should only be used when portability is not a concern.
If little is an empty string, big is returned; if little occurs nowhere in big, NULL is returned; otherwise a pointer to the first character of the first occurrence of little is returned.
The following sets the pointer ptr to the "Bar Baz" portion of largestring: const char *largestring = "Foo Bar Baz"; const char *smallstring = "Bar"; char *ptr; ptr = strstr(largestring, smallstring);
index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strtok(3)
The strstr() function conforms to ISO/IEC 9899:1990 (``ISO C90'').
The strnstr() function originated in FreeBSD. NetBSD 9.0 September 24, 2014 NetBSD 9.0
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