STRING(3)                 (2019-03-06)                  STRING(3)

     NAME
          stpcpy, strcasecmp, strcat, strchr, strcmp, strcoll, strcpy,
          strcspn, strdup, strfry, strlen, strncat, strncmp, strncpy,
          strncasecmp, strpbrk, strrchr, strsep, strspn, strstr,
          strtok, strxfrm, index, rindex - string operations

     SYNOPSIS
          #include <strings.h>

          int strcasecmp(const char *s1, const char *s2);
               Compare the strings s1 and s2 ignoring case.

          int strncasecmp(const char *s1, const char *s2, size_t n
               Compare the first n bytes of the strings s1 and s2
               ignoring case.

          char *index(const char *s, int c);
               Return a pointer to the first occurrence of the charac-
               ter c in the string s.

          char *rindex(const char *s, int c);
               Return a pointer to the last occurrence of the charac-
               ter c in the string s.

          #include <string.h>

          char *stpcpy(char *dest, const char *src);
               Copy a string from src to dest, returning a pointer to
               the end of the resulting string at dest.

          char *strcat(char *dest, const char *src);
               Append the string src to the string dest, returning a
               pointer dest.

          char *strchr(const char *s, int c);
               Return a pointer to the first occurrence of the charac-
               ter c in the string s.

          int strcmp(const char *s1, const char *s2);
               Compare the strings s1 with s2.

          int strcoll(const char *s1, const char *s2);
               Compare the strings s1 with s2 using the current
               locale.

          char *strcpy(char *dest, const char *src);
               Copy the string src to dest, returning a pointer to the
               start of dest.

          size_t strcspn(const char *s, const char *reject);

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               Calculate the length of the initial segment of the
               string s which does not contain any of bytes in the
               string reject,

          char *strdup(const char *s);
               Return a duplicate of the string s in memory allocated
               using malloc(3).

          char *strfry(char *string);
               Randomly swap the characters in string.

          size_t strlen(const char *s);
               Return the length of the string s.

          char *strncat(char *dest, const char *src, size_t n
               Append at most n bytes from the string src to the
               string dest, returning a pointer to dest.

          int strncmp(const char *s1, const char *s2, size_t n
               Compare at most n bytes of the strings s1 and s2.

          char *strncpy(char *dest, const char *src, size_t n
               Copy at most n bytes from string src to dest, returning
               a pointer to the start of dest.

          char *strpbrk(const char *s, const char *accept);
               Return a pointer to the first occurrence in the string
               s of one of the bytes in the string accept.

          char *strrchr(const char *s, int c);
               Return a pointer to the last occurrence of the charac-
               ter c in the string s.

          char *strsep(char **stringp, const char *delim);
               Extract the initial token in stringp that is delimited
               by one of the bytes in delim.

          size_t strspn(const char *s, const char *accept);
               Calculate the length of the starting segment in the
               string s that consists entirely of bytes in accept.

          char *strstr(const char *haystack, const char *needle);
               Find the first occurrence of the substring needle in
               the string haystack, returning a pointer to the found
               substring.

          char *strtok(char *s, const char *delim);
               Extract tokens from the string s that are delimited by
               one of the bytes in delim.

          size_t strxfrm(char *dest, const char *src, size_t n
               Transforms src to the current locale and copies the

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     STRING(3)                 (2019-03-06)                  STRING(3)

               first n bytes to dest.

     DESCRIPTION
          The string functions perform operations on null-terminated
          strings.  See the individual man pages for descriptions of
          each function.

     SEE ALSO
          index(3), rindex(3), stpcpy(3), strcasecmp(3), strcat(3),
          strchr(3), strcmp(3), strcoll(3), strcpy(3), strcspn(3),
          strdup(3), strfry(3), strlen(3), strncasecmp(3), strncat(3),
          strncmp(3), strncpy(3), strpbrk(3), strrchr(3), strsep(3),
          strspn(3), strstr(3), strtok(3), strxfrm(3)

     COLOPHON
          This page is part of release 5.10 of the Linux man-pages
          project.  A 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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