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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),

2026-08-10 Linux man-pages 6.19