NAME strstr, strcasestr - locate a substring LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include char ... strstr(const char * haystack , const char * needle ); #define _G…NAME strstr, strcasestr - locate a substring LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include char ... strstr(const char * haystack , const char * needle ); #define _G…strncmp, strncpy, strncasecmp, strpbrk, strrchr, strsep, strspn, strstr, strtok, strxfrm, index, rindex - string operations LIBRARY ... consists entirely of bytes in accept . char …wide-character equivalent of the strstr (3) function. It searches for the first occurrence ... POSIX.1-2008. HISTORY POSIX.1-2001, C99. SEE ALSO strstr (3), wcschrstring (3), strpbrk (3), strsep (3), strstr (3), strtok (3), wcscspn (3), wcsspnstrpbrk (3), strsep (3), strspn (3), strstr (3), strtok (3), wcschr (3), wcsrchrstring (3), strpbrk (3), strsep (3), strstr (3), strtok (3), wcscspn (3), wcsspnstring (3), strsep (3), strspn (3), strstr (3), strtok (3), wcspbrkstrpbrk (3), strsep (3), strspn (3), strstr (3), strtok (3), wcschr (3), wcsrchrstrpbrk (3), strsep (3), strspn (3), strstr (3), strtok (3), wcschr (3), wcsrchr