strchr(3)strchr(3)NAME
index, rindex, strchr, strrchr - Search for character in string
SYNOPSIS
#include <strings.h>
char *index(
const char *s,
int c ); char *rindex(
const char *s,
int c ); #include <string.h>
char *strchr(
const char *s,
int c ); char *strrchr(
const char *s,
int c );
LIBRARY
Standard C Library (libc)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
index(), rindex(): XPG4-UNIX
strchr(), strrchr(): XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Specifies the string to search. Specifies a character, expressed as an
int data type, to search for.
DESCRIPTION
The index() function locates the first occurrence of the integer speci‐
fied by the c parameter, which is converted to an unsigned char, in the
string pointed to by the s parameter. The terminating null byte is
treated as part of the string pointed to by the s parameter.
The rindex() function locates the last occurrence of the integer speci‐
fied by the c parameter, which is converted to a char value, in the
string pointed to by the s parameter. The terminating null byte is
treated as a part of the string pointed to by the s parameter.
The strchr() and strrchr() functions provide the same functionality as
the index() and rindex() functions, respectively.
If c is a null byte ('\0') in any of these functions, the function
locates the terminating null byte of s.
RETURN VALUES
Upon successful completion, these functions return a pointer to the
byte in the scanned string. When the byte specified by parameter c is
not found, a null pointer is returned.
SEE ALSO
Functions: string(3), wcschr(3)
Standards: standards(5)strchr(3)