STRING
Section: Linux Programmer's Manual (3)
Updated: 2019-03-06
Page Index
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 *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 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 *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);
-
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 character
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 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/.