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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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STRNCMP(3P) POSIX Programmer's Manual STRNCMP(3P)
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.
strncmp — compare part of two strings
#include <string.h>
int strncmp(const char *s1, const char *s2, size_t n);
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The strncmp() function shall compare not more than n bytes (bytes
that follow a NUL character are not compared) from the array
pointed to by s1 to the array pointed to by s2.
The sign of a non-zero return value is determined by the sign of
the difference between the values of the first pair of bytes
(both interpreted as type unsigned char) that differ in the
strings being compared.
Upon successful completion, strncmp() shall return an integer
greater than, equal to, or less than 0, if the possibly null-
terminated array pointed to by s1 is greater than, equal to, or
less than the possibly null-terminated array pointed to by s2
respectively.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
strcmp(3p)
The Base Definitions volume of POSIX.1‐2017, string.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. 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.opengroup.org/unix/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 2017 STRNCMP(3P)
Pages that refer to this page: string.h(0p), strcmp(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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