strchr, strrchr

Standard C library (libc, -lc)

#include <string.h>

char *strchr(const char *s, int c);
char *strrchr(const char *s, int c);

strchr()

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

It is equivalent to both of the following expressions:

memchr(s, c, strlen(s) + 1)
strpbrk(s, (char [2]){c, '\0'})
    

strrchr()

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

It is equivalent to

memrchr(s, c, strlen(s) + 1)
    

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.

For an explanation of the terms used in this section, see attributes(7).

C11, POSIX.1-2008.

POSIX.1-2001, C89, SVr4, 4.3BSD.

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