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strstr(3) Library Functions Manual strstr(3) NAME strstr - Finds a substring LIBRARY Standard C Library (libc.so, libc.a) SYNOPSIS #include <string.h> char *strstr( const char *s1, const char *s2); 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 in- dustry 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. RELATED INFORMATION Functions: string(3), wcsstr(3), wcswcs(3) Standards: standards(5) delim off strstr(3)