diff options
| author | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-05 23:03:38 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-05 23:03:47 +0200 |
| commit | 70ac1c4785fc1e158ab2349a962dba2526bf4fbc (patch) | |
| tree | bff270e2496dd284bccfc1271b43946f5d225224 /man/man3/strdup.3 | |
| parent | 5423a6f86b2b920a5f3e8cf8d759b513050f2d33 (diff) | |
| download | man-pages-70ac1c4785fc1e158ab2349a962dba2526bf4fbc.tar.gz | |
src.mk, All pages: Move man* to man/
The root of the repository is becoming a bit overpopulated and
unorganized, due to the recent addition of more mandirs, and more
informative and configuration files too. Let's create a specific
mandir <man/> that contains the mandirs <man[1-8]*>.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Diffstat (limited to 'man/man3/strdup.3')
| -rw-r--r-- | man/man3/strdup.3 | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/man/man3/strdup.3 b/man/man3/strdup.3 new file mode 100644 index 0000000000..7d15245b4f --- /dev/null +++ b/man/man3/strdup.3 @@ -0,0 +1,134 @@ +.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" References consulted: +.\" Linux libc source code +.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) +.\" 386BSD man pages +.\" Modified Sun Jul 25 10:41:34 1993 by Rik Faith (faith@cs.unc.edu) +.\" Modified Wed Oct 17 01:12:26 2001 by John Levon <moz@compsoc.man.ac.uk> +.TH STRDUP 3 2021-03-22 "Linux man-pages (unreleased)" +.SH NAME +strdup, strndup, strdupa, strndupa \- duplicate a string +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <string.h> +.PP +.BI "char *strdup(const char *" s ); +.PP +.BI "char *strndup(const char *" s ", size_t " n ); +.BI "char *strdupa(const char *" s ); +.BI "char *strndupa(const char *" s ", size_t " n ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR strdup (): +.nf + _XOPEN_SOURCE >= 500 +.\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED + || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L + || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE +.fi +.PP +.BR strndup (): +.nf + Since glibc 2.10: + _POSIX_C_SOURCE >= 200809L + Before glibc 2.10: + _GNU_SOURCE +.fi +.PP +.BR strdupa (), +.BR strndupa (): +.nf + _GNU_SOURCE +.fi +.SH DESCRIPTION +The +.BR strdup () +function returns a pointer to a new string which +is a duplicate of the string +.IR s . +Memory for the new string is +obtained with +.BR malloc (3), +and can be freed with +.BR free (3). +.PP +The +.BR strndup () +function is similar, but copies at most +.I n +bytes. +If +.I s +is longer than +.IR n , +only +.I n +bytes are copied, and a terminating null byte (\(aq\e0\(aq) is added. +.PP +.BR strdupa () +and +.BR strndupa () +are similar, but use +.BR alloca (3) +to allocate the buffer. +.SH RETURN VALUE +On success, the +.BR strdup () +function returns a pointer to the duplicated +string. +It returns NULL if insufficient memory was available, with +.I errno +set to indicate the error. +.SH ERRORS +.TP +.B ENOMEM +Insufficient memory available to allocate duplicate string. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.ad l +.nh +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.BR strdup (), +.BR strndup (), +.BR strdupa (), +.BR strndupa () +T} Thread safety MT-Safe +.TE +.hy +.ad +.sp 1 +.SH STANDARDS +.\" 4.3BSD-Reno, not (first) 4.3BSD. +.BR strdup () +conforms to SVr4, 4.3BSD, POSIX.1-2001. +.BR strndup () +conforms to POSIX.1-2008. +.BR strdupa () +and +.BR strndupa () +are GNU extensions. +.SH SEE ALSO +.BR alloca (3), +.BR calloc (3), +.BR free (3), +.BR malloc (3), +.BR realloc (3), +.BR string (3), +.BR wcsdup (3) |