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strings.h — string operations

strings.h(7POSIX) POSIX Programmer's Manual strings.h(7POSIX)


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.


strings.h — string operations


#include <strings.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.

int    ffs(int);
int    strcasecmp(const char *, const char *);
int    strcasecmp_l(const char *, const char *, locale_t);
int    strncasecmp(const char *, const char *, size_t);
int    strncasecmp_l(const char *, const char *, size_t, locale_t);
The <strings.h> header shall define the locale_t type as described in <locale.h>.
The <strings.h> header shall define the size_t type as described in <sys/types.h>.
The following sections are informative.








<locale.h>, <sys_types.h>
The System Interfaces volume of POSIX.1‐2008, ffs(), strcasecmp() 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 .
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2013 IEEE/The Open Group