strrchr(3)

NAME

   strchr, strrchr, strchrnul - locate character in string

SYNOPSIS

   #include <string.h>

   char *strchr(const char *s, int c);

   char *strrchr(const char *s, int c);

   #define _GNU_SOURCE         /* See feature_test_macros(7) */
   #include <string.h>

   char *strchrnul(const char *s, int c);

DESCRIPTION

   The  strchr() function returns a pointer to the first occurrence of the
   character c in the string s.

   The strrchr() function returns a pointer to the last occurrence of  the
   character c in the string s.

   The strchrnul() function is like strchr() except that if c is not found
   in s, then it returns a pointer to the null  byte  at  the  end  of  s,
   rather than NULL.

   Here "character" means "byte"; these functions do not work with wide or
   multibyte characters.

RETURN VALUE

   The strchr() and strrchr() functions return a pointer  to  the  matched
   character  or NULL if the character is not found.  The terminating null
   byte is considered part of the string, so that if  c  is  specified  as
   '\0', these functions return a pointer to the terminator.

   The strchrnul() function returns a pointer to the matched character, or
   a pointer to the null byte at the end of s (i.e., s+strlen(s))  if  the
   character is not found.

VERSIONS

   strchrnul() first appeared in glibc in version 2.1.1.

ATTRIBUTES

   For   an   explanation   of   the  terms  used  in  this  section,  see
   attributes(7).

   ┌─────────────────────────────────┬───────────────┬─────────┐
   │Interface                        │ Attribute     │ Value   │
   ├─────────────────────────────────┼───────────────┼─────────┤
   │strchr(), strrchr(), strchrnul() │ Thread safety │ MT-Safe │
   └─────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

   strchr(),  strrchr():  POSIX.1-2001,  POSIX.1-2008,  C89,  C99,   SVr4,
   4.3BSD.

   strchrnul() is a GNU extension.

SEE ALSO

   index(3),   memchr(3),  rindex(3),  string(3),  strlen(3),  strpbrk(3),
   strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3), wcsrchr(3)

COLOPHON

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   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.

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