strchr, strrchr, strchrnul - locate character in string
Standard C library (libc, -lc)
#include <string.h>
char *strchr(const char *s, int c);
char *strrchr(const char *s, int c);
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
char *strchrnul(const char *s, int c);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.
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.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| Thread safety | MT-Safe |