strchr, strrchr, strchrnul - locate character in string

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ strchr(), strrchr(), strchrnul()                                            │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       The strchr() function returns a pointer to the first occurrence of the character c in the string s.

       The strrchr() function returns a pointer to the last occurrence of the character c in the string s.

       The  strchrnul()  function is like strchr() except that if c is not found in s, then it returns a pointer
       to the null byte at the end of s, rather than NULL.

       Here "character" means "byte"; these functions do not work with wide or multibyte characters.

strchr()
       strrchr()
              POSIX.1-2001, C89, SVr4, 4.3BSD.

       strchrnul()
              glibc 2.1.1, FreeBSD 10, NetBSD 8.

       Standard C library (libc, -lc)

       strchr, strrchr, strchrnul - locate character in string

       The strchr() and strrchr() functions return a pointer to the matched character or NULL if  the  character
       is  not  found.  The terminating null byte is considered part of the string, so that if c is specified as
       '\0', these functions return a pointer to the terminator.

       The strchrnul() function returns a pointer to the matched character, or a pointer to the null byte at the
       end of s (i.e., s+strlen(s)) if the character is not found.

memchr(3), string(3), strlen(3),  strpbrk(3),  strsep(3),  strspn(3),  strstr(3),  strtok(3),  wcschr(3),
       wcsrchr(3)

Linux man-pages 6.9.1                              2024-06-15                                          strchr(3)

strchr()
       strrchr()
              C11, POSIX.1-2008.

       strchrnul()
              GNU.

#include<string.h>char*strchr(constchar*s,intc);char*strrchr(constchar*s,intc);#define_GNU_SOURCE         /* See feature_test_macros(7) */
       #include<string.h>char*strchrnul(constchar*s,intc);