strstr(3)strstr(3)NAMEstrstr - Find a substring
SYNOPSIS
#include <string.h>
char *strstr(
const char *s1,
const char *s2 );
LIBRARY
Standard C Library (libc)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
strstr(): ISO C, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Specifies the character string being searched. Specifies the substring
to be located.
DESCRIPTION
The strstr() function locates the first occurrence in the string
pointed to by the s1 parameter of the sequence of bytes in the string
pointed to by the s2 parameter, excluding the terminating null charac‐
ter.
RETURN VALUES
On successful completion, the strstr() function returns a pointer to
the located string or a null pointer if the string is not found. When
the s2 parameter points to a string having 0 (zero) length, the
strstr() function returns the string pointed to by parameter s1.
SEE ALSO
Functions: string(3), wcsstr(3), wcswcs(3)
Standards: standards(5)strstr(3)