comparing 2 strings

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LEARN ABOUT SUNOS

strcasecmp

strcmp(9F)						   Kernel Functions for Drivers 						strcmp(9F)

NAME

       strcmp, strcasecmp, strncasecmp, strncmp - compare two null-terminated strings.

SYNOPSIS

       #include <sys/ddi.h>

       int strcmp(const char *s1, const char *s2);

       int strcasecmp(const char *s1, const char *s2);

       int strncasecmp(const char *s1, const char *s2, size_t n);

       int strncmp(const char *s1, const char *s2, size_t n);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       s1, s2	       Pointers to character strings.

       n	       Count of characters to be compared.

DESCRIPTION

   strcmp()
       strcmp()  returns   0  if  the strings are the same, or the integer value of the expression (*s1 - *s2) for the last characters compared if
       they differ.

   strcasecmp(), strncasecmp()
       The strcasecmp() and strncasecmp() functions are case-insensitive versions of strcmp() and strncmp(), respectively, described in this  sec-
       tion.  They assume the ASCII character set and ignore differences in case when comparing lowercase and uppercase characters.

   strncmp()
       strncmp()  returns  0 if the first  n characters of  s1 and  s2 are the same, or  (*s1 - *s2) for the last characters compared if they dif-
       fer.

RETURN VALUES

       strcmp() returns  0 if the strings are the same, or  (*s1 - *s2) for the last characters compared if they differ.

       strcasecmp() and strncasecmp() return values in the same fashion as strcmp() and strncmp(), respectively.

       strncmp() returns  0 if the first n characters of strings are the same, or  (*s1 - *s2) for the last characters compared if they differ.

CONTEXT

       These functions can be called from user or interrupt context.

SEE ALSO

       Writing Device Drivers

SunOS 5.10							    1 Apr 1994								strcmp(9F)

Shell Programming and Scripting