string

STRING(3)                   Linux Programmer's Manual                  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 character c in the
              string s.

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

       #include <string.h>

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

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

       size_t strcspn(const char *s, const char *reject);
              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 *restrict dest, const char *restrict 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 *restrict dest, const char *restrict 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 character c in the
              string s.

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

       size_t strxfrm(char *restrict dst, const char *restrict src, size_t n);
              Transforms src to the current locale and copies the first n bytes
              to dst.

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

SEE ALSO
       bstring(3), 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 5.11 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/.



                                   2021-03-22                          STRING(3)