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string.h

Section: POSIX Programmer's Manual (0P)
Updated: 2013
Index Return to Main Contents
 

PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

 

NAME

string.h --- string operations  

SYNOPSIS

#include <string.h>
 

DESCRIPTION

Some of the functionality described on this reference page extends the ISO C standard. Applications shall define the appropriate feature test macro (see the System Interfaces volume of POSIX.1-2008, Section 2.2, The Compilation Environment) to enable the visibility of these symbols in this header. The <string.h> header shall define NULL and size_t as described in <stddef.h>. The <string.h> header shall define the locale_t type as described in <locale.h>. The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided for use with ISO C standard compilers.


void    *memccpy(void *restrict, const void *restrict, int, size_t);
void    *memchr(const void *, int, size_t);
int      memcmp(const void *, const void *, size_t);
void    *memcpy(void *restrict, const void *restrict, size_t);
void    *memmove(void *, const void *, size_t);
void    *memset(void *, int, size_t);
char    *stpcpy(char *restrict, const char *restrict);
char    *stpncpy(char *restrict, const char *restrict, size_t);
char    *strcat(char *restrict, const char *restrict);
char    *strchr(const char *, int);
int      strcmp(const char *, const char *);
int      strcoll(const char *, const char *);
int      strcoll_l(const char *, const char *, locale_t);
char    *strcpy(char *restrict, const char *restrict);
size_t   strcspn(const char *, const char *);
char    *strdup(const char *);
char    *strerror(int);
char    *strerror_l(int, locale_t);
int      strerror_r(int, char *, size_t);
size_t   strlen(const char *);
char    *strncat(char *restrict, const char *restrict, size_t);
int      strncmp(const char *, const char *, size_t);
char    *strncpy(char *restrict, const char *restrict, size_t);
char    *strndup(const char *, size_t);
size_t   strnlen(const char *, size_t);
char    *strpbrk(const char *, const char *);
char    *strrchr(const char *, int);
char    *strsignal(int);
size_t   strspn(const char *, const char *);
char    *strstr(const char *, const char *);
char    *strtok(char *restrict, const char *restrict);
char    *strtok_r(char *restrict, const char *restrict, char **restrict);
size_t   strxfrm(char *restrict, const char *restrict, size_t);
size_t   strxfrm_l(char *restrict, const char *restrict,
             size_t, locale_t);
Inclusion of the <string.h> header may also make visible all symbols from <stddef.h>.

The following sections are informative.  

APPLICATION USAGE

None.  

RATIONALE

None.  

FUTURE DIRECTIONS

None.  

SEE ALSO

<locale.h>, <stddef.h>, <sys_types.h> The System Interfaces volume of POSIX.1-2008, Section 2.2, The Compilation Environment, memccpy(), memchr(), memcmp(), memcpy(), memmove(), memset(), strcat(), strchr(), strcmp(), strcoll(), strcpy(), strcspn(), strdup(), strerror(), strlen(), strncat(), strncmp(), strncpy(), strpbrk(), strrchr(), strsignal(), strspn(), strstr(), strtok(), strxfrm()  

COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .


 

Index

PROLOG
NAME
SYNOPSIS
DESCRIPTION
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT


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