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

string.h(0P)              POSIX Programmer's Manual             string.h(0P)

PROLOG         top

       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         top

       string.h — string operations

SYNOPSIS         top

       #include <string.h>

DESCRIPTION         top

       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         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       locale.h(0p), stddef.h(0p), sys_types.h(0p)

       The System Interfaces volume of POSIX.1‐2008, Section 2.2, The
       Compilation Environment, memccpy(3p), memchr(3p), memcmp(3p),
       memcpy(3p), memmove(3p), memset(3p), strcat(3p), strchr(3p),
       strcmp(3p), strcoll(3p), strcpy(3p), strcspn(3p), strdup(3p),
       strerror(3p), strlen(3p), strncat(3p), strncmp(3p), strncpy(3p),
       strpbrk(3p), strrchr(3p), strsignal(3p), strspn(3p), strstr(3p),
       strtok(3p), strxfrm(3p)

COPYRIGHT         top

       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 .

IEEE/The Open Group                 2013                        string.h(0P)