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diff --git a/man-pages-posix-2017/man3p/strncpy.3p b/man-pages-posix-2017/man3p/strncpy.3p new file mode 100644 index 0000000..4fbde2d --- /dev/null +++ b/man-pages-posix-2017/man3p/strncpy.3p @@ -0,0 +1,118 @@ +'\" et +.TH STRNCPY "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" +.SH 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. +.\" +.SH NAME +stpncpy, strncpy +\(em copy fixed length string, returning a pointer to the array end +.SH SYNOPSIS +.LP +.nf +#include <string.h> +.P +char *stpncpy(char *restrict \fIs1\fP, const char *restrict \fIs2\fP, size_t \fIn\fP); +char *strncpy(char *restrict \fIs1\fP, const char *restrict \fIs2\fP, size_t \fIn\fP); +.fi +.SH DESCRIPTION +For +\fIstrncpy\fR(): +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\(hy2017 defers to the ISO\ C standard. +.P +The +\fIstpncpy\fR() +and +\fIstrncpy\fR() +functions shall copy not more than +.IR n +bytes (bytes that follow a NUL character are not copied) from the array +pointed to by +.IR s2 +to the array pointed to by +.IR s1 . +.P +If the array pointed to by +.IR s2 +is a string that is shorter than +.IR n +bytes, NUL characters shall be appended to the copy in the array +pointed to by +.IR s1 , +until +.IR n +bytes in all are written. +.P +If copying takes place between objects that overlap, the behavior is +undefined. +.SH "RETURN VALUE" +If a NUL character is written to the destination, the +\fIstpncpy\fR() +function shall return the address of the first such NUL character. +Otherwise, it shall return +.IR &s1 [ n ]. +.P +The +\fIstrncpy\fR() +function shall return +.IR s1 . +.P +No return values are reserved to indicate an error. +.SH ERRORS +No errors are defined. +.LP +.IR "The following sections are informative." +.SH EXAMPLES +None. +.SH "APPLICATION USAGE" +Applications must provide the space in +.IR s1 +for the +.IR n +bytes to be transferred, as well as ensure that the +.IR s2 +and +.IR s1 +arrays do not overlap. +.P +Character movement is performed differently in different +implementations. Thus, overlapping moves may yield surprises. +.P +If there is no NUL character byte in the first +.IR n +bytes of the array pointed to by +.IR s2 , +the result is not null-terminated. +.SH RATIONALE +None. +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.IR "\fIstrcpy\fR\^(\|)", +.IR "\fIwcsncpy\fR\^(\|)" +.P +The Base Definitions volume of POSIX.1\(hy2017, +.IR "\fB<string.h>\fP" +.\" +.SH COPYRIGHT +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 . +.PP +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 . |