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    Command:

    mkostemps

    
    
    

    SYNOPSIS

           #include <stdlib.h>
    
           int mkstemp(char *template);
    
           int mkostemp(char *template, int flags);
    
           int mkstemps(char *template, int suffixlen);
    
           int mkostemps(char *template, int suffixlen, int flags);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           mkstemp():
               _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
               _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
               || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200112L
    
           mkostemp(): _GNU_SOURCE
           mkstemps(): _BSD_SOURCE || _SVID_SOURCE
           mkostemps(): _GNU_SOURCE
    
    
    

    DESCRIPTION

           The  mkstemp() function generates a unique temporary filename from tem-
           plate, creates and opens the file, and returns an open file  descriptor
           for the file.
    
           The  last  six  characters  of  template must be "XXXXXX" and these are
           replaced with a string that makes the filename unique.  Since  it  will
           be  modified,  template  must  not  be a string constant, but should be
           declared as a character array.
    
           The file is created with permissions 0600, that is, read plus write for
           owner  only.  The returned file descriptor provides both read and write
           access to the file.  The file is opened with the open(2)  O_EXCL  flag,
           guaranteeing that the caller is the process that creates the file.
    
           The mkostemp() function is like mkstemp(), with the difference that the
           following bits--with the same meaning as for open(2)--may be specified in
           flags:  O_APPEND,  O_CLOEXEC,  and O_SYNC.  Note that when creating the
           file, mkostemp() includes the values O_RDWR, O_CREAT, and O_EXCL in the
           flags  argument  given  to open(2); including these values in the flags
           argument given to mkostemp() is unnecessary,  and  produces  errors  on
           some systems.
    
           The  mkstemps()  function  is like mkstemp(), except that the string in
           template contains a suffix of suffixlen characters.  Thus, template  is
           of  the  form  prefixXXXXXXsuffix, and the string XXXXXX is modified as
           for mkstemp().
    
           The  mkostemps()  function  is  to  mkstemps()  as  mkostemp()  is   to
           mkstemp().
                  suffix in template were not XXXXXX.
    
           These functions may also fail with any  of  the  errors  described  for
           open(2).
    
    
    

    VERSIONS

           mkostemp()  is  available  since glibc 2.7.  mkstemps() and mkostemps()
           are available since glibc 2.11.
    
    
    

    CONFORMING TO

           mkstemp(): 4.3BSD, POSIX.1-2001.
    
           mkstemps(): unstandardized, but appears on several other systems.
    
           mkostemp() and mkostemps(): are glibc extensions.
    
    
    

    NOTES

           In glibc versions 2.06 and earlier, the file is  created  with  permis-
           sions  0666,  that is, read and write for all users.  This old behavior
           may be a security risk, especially since other UNIX flavors  use  0600,
           and   somebody  might  overlook  this  detail  when  porting  programs.
           POSIX.1-2008 adds a requirement that the  file  be  created  with  mode
           0600.
    
           More  generally, the POSIX specification of mkstemp() does not say any-
           thing about file modes, so the application should make  sure  its  file
           mode  creation  mask (see umask(2)) is set appropriately before calling
           mkstemp() (and mkostemp()).
    
           The prototype for mktemp() is in <unistd.h> for libc4,  libc5,  glibc1;
           glibc2 follows POSIX.1 and has the prototype in <stdlib.h>.
    
    
    

    SEE ALSO

           mkdtemp(3), mktemp(3), tempnam(3), tmpfile(3), tmpnam(3)
    
    
    

    GNU 2013-12-28 MKSTEMP(3)

    
    
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