strchr(3)                  Library Functions Manual                  strchr(3)

NAME
       strchr - string search character

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <string.h>

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

DESCRIPTION
       strchr() 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'})

RETURN VALUE
       strchr() returns 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', strchr() returns a pointer to the terminator.

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |strchr ()                                   | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

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

SEE ALSO
       memchr(3), string(3), strchrnul(3), strnul(3), strpbrk(3), strrchr(3),
       strsep(3), strspn(3), strstr(3), wcschr(3),

Linux man-pages 6.19              2026-08-10                         strchr(3)