diff options
Diffstat (limited to 'manual/filesys.texi')
| -rw-r--r-- | manual/filesys.texi | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/manual/filesys.texi b/manual/filesys.texi index 51af84633d..29f20758e8 100644 --- a/manual/filesys.texi +++ b/manual/filesys.texi @@ -2935,7 +2935,7 @@ end with @samp{XXXXXX}, @code{mkstemp} returns @code{-1} and does not modify @var{template}. The file is opened using mode @code{0600}. If the file is meant to be -used by other users the mode must explicitly changed. +used by other users the mode must be changed explicitly. @end deftypefun Unlike @code{mktemp}, @code{mkstemp} is actually guaranteed to create a @@ -2943,3 +2943,28 @@ unique file that cannot possibly clash with any other program trying to create a temporary file. This is because it works by calling @code{open} with the @code{O_EXCL} flag bit, which says you want to always create a new file, and get an error if the file already exists. + +@comment stdlib.h +@comment BSD +@deftypefun {char *} mkdtemp (char *@var{template}) +The @code{mkdtemp} function creates a directory with a unique name. If +it succeeds, it overwrites @var{template} with the name of the +directory, and returns @var{template}. As with @code{mktemp} and +@code{mkstemp}, @var{template} should be a string ending with +@samp{XXXXXX}. + +If @code{mkdtemp} cannot create an uniquely named directory, it returns +@code{NULL} and sets @var{errno} appropriately. If @var{template} does +not end with @samp{XXXXXX}, @code{mkdtemp} returns @code{NULL} and does +not modify @var{template}. @var{errno} will be set to @code{EINVAL} in +this case. + +The directory is created using mode @code{0700}. +@end deftypefun + +The directory created by @code{mkdtemp} cannot clash with temporary +files or directories created by other users. This is because directory +creation always works like @code{open} with @code{O_EXCL}. +@xref{Creating Directories}. + +The @code{mkdtemp} function comes from OpenBSD. |