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The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
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3. Neither the name of the University nor the names of its contributors
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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@(#)strdup.3 8.1 (Berkeley) 6/9/93
$FreeBSD$
.Dd May 5, 2020 .Dt STRDUP 3 .Os .Sh NAME .Nm strdup , .Nm strndup .Nd save a copy of a string .Sh LIBRARY .Lb libc .Sh SYNOPSIS n string.h .Ft char * .Fn strdup "const char *str" .Ft char * .Fn strndup "const char *str" "size_t len" .Sh DESCRIPTION The .Fn strdup function allocates sufficient memory for a copy of the string .Fa str , does the copy, and returns a pointer to it. The memory is allocated with .Xr malloc 3 and should be released with .Xr free 3 when no longer needed.
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)strdup.3 8.1 (Berkeley) 6/9/93
$FreeBSD$
.Dd May 5, 2020 .Dt STRDUP 3 .Os .Sh NAME .Nm strdup , .Nm strndup .Nd save a copy of a string .Sh LIBRARY .Lb libc .Sh SYNOPSIS n string.h .Ft char * .Fn strdup "const char *str" .Ft char * .Fn strndup "const char *str" "size_t len" .Sh DESCRIPTION The .Fn strdup function allocates sufficient memory for a copy of the string .Fa str , does the copy, and returns a pointer to it. The memory is allocated with .Xr malloc 3 and should be released with .Xr free 3 when no longer needed.
p The .Fn strndup function copies at most .Fa len characters from the string .Fa str always .Dv NUL terminating the copied string. .Sh RETURN VALUES If insufficient memory is available, NULL is returned and .Va errno is set to .Er ENOMEM . Otherwise, the .Fn strdup family of functions return a pointer to the copied string. .Sh SEE ALSO .Xr free 3 , .Xr malloc 3 , .Xr wcsdup 3 .Sh STANDARDS The .Fn strdup function is specified by .St -p1003.1-2001 . The .Fn strndup function is specified by .St -p1003.1-2008 . .Sh HISTORY The .Fn strdup function first appeared in x 4.3 Reno . The .Fn strndup function was added in .Fx 7.2 .