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Top Forums Programming how to simulate "mkdir -p /home/blah1/blah2/blah3" in "c" where only /home exist Post 302359450 by achenle on Tuesday 6th of October 2009 02:55:30 PM
Old 10-06-2009
Quote:
Originally Posted by emitrax
The best way is probably to iterate and call mkdir and chdir every time.
I'm actually in the process of doing something similar, and that's the way I'll go.
Constructing the (full) path every time is quite annoying, while changing the working
directory should be more easy.

S.
That solution introduces an effect that impacts the entire process it's running in: the changing of the current directory.

If you do something like that you will then have what's almost certainly an undocumented and definitely an unnecessary dependency on the internal implementation of what should in theory be reusable code. Unless you fully document all the internals of such calls, then you'll only have an unnecessary dependency.

And you'll outright break multithreaded apps because threads other than the one calling a mkdir() call that changes the current directory will have the current directory modified right out from under their processing.
 

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MKDIR(1)						    BSD General Commands Manual 						  MKDIR(1)

NAME
mkdir -- make directories SYNOPSIS
mkdir [-p] [-m mode] directory_name ... DESCRIPTION
mkdir creates the directories named as operands, in the order specified, using mode rwxrwxrwx (0777) as modified by the current umask(2). The options are as follows: -m Set the file permission bits of the final created directory to the specified mode. The mode argument can be in any of the formats specified to the chmod(1) utility. If a symbolic mode is specified, the operation characters ``+'' and ``-'' are interpreted rela- tive to an initial mode of ``a=rwx''. -p Create intermediate directories as required. If this option is not specified, the full path prefix of each operand must already exist. Intermediate directories are created with permission bits of rwxrwxrwx (0777) as modified by the current umask, plus write and search permission for the owner. Do not consider it an error if the argument directory already exists. The user must have write permission in the parent directory. EXIT STATUS
mkdir exits 0 if successful, and >0 if an error occurred. SEE ALSO
chmod(1), rmdir(1), mkdir(2), umask(2) STANDARDS
The mkdir utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
January 25, 1994 BSD
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