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@(#)strchr.3 8.2 (Berkeley) 4/19/94
$FreeBSD$
.Dd February 13, 2013 .Dt STRCHR 3 .Os .Sh NAME .Nm strchr , strrchr , strchrnul .Nd locate character in string .Sh LIBRARY .Lb libc .Sh SYNOPSIS n string.h .Ft "char *" .Fn strchr "const char *s" "int c" .Ft "char *" .Fn strrchr "const char *s" "int c" .Ft "char *" .Fn strchrnul "const char *s" "int c" .Sh DESCRIPTION The .Fn strchr function locates the first occurrence of .Fa c (converted to a .Vt char ) in the string pointed to by .Fa s . The terminating null character is considered part of the string; therefore if .Fa c is .Ql \e0 , the functions locate the terminating .Ql \e0 .
p The .Fn strrchr function is identical to .Fn strchr except it locates the last occurrence of .Fa c .
p The .Fn strchrnul function is identical to .Fn strchr except that if .Fa c is not found in .Fa s a pointer to the terminating .Ql \e0 is returned. .Sh RETURN VALUES The functions .Fn strchr and .Fn strrchr return a pointer to the located character, or .Dv NULL if the character does not appear in the string.
p .Fn strchrnul returns a pointer to the terminating .Ql \e0 if the character does not appear in the string. .Sh SEE ALSO .Xr memchr 3 , .Xr memmem 3 , .Xr strcspn 3 , .Xr strpbrk 3 , .Xr strsep 3 , .Xr strspn 3 , .Xr strstr 3 , .Xr strtok 3 , .Xr wcschr 3 .Sh STANDARDS The functions .Fn strchr and .Fn strrchr conform to .St -isoC . The function .Fn strchrnul is a .Tn GNU extension. .Sh HISTORY The .Fn strchrnul function first appeared in glibc 2.1.1 and was added in .Fx 10.0 .