xio-creat.c

   1 /* source: xio-creat.c */
   2 /* Copyright Gerhard Rieger and contributors (see file CHANGES) */
   3 /* Published under the GNU General Public License V.2, see file COPYING */
   4
   5 /* this file contains the source for opening addresses of create type */
   6
   7 #include "xiosysincludes.h"
   8
   9 #if WITH_CREAT
  10
  11 #include "xioopen.h"
  12 #include "xio-named.h"
  13 #include "xio-creat.h"
  14
  15
  16 static int xioopen_creat(int arg, const char *argv[], struct opt *opts, int rw, xiofile_t *fd, const struct addrdesc *addrdesc);
  17
  18
  19 /*! within stream model, this is a write-only address - use 2 instead of 3 */
  20 const struct addrdesc xioaddr_creat  = { "CREATE", 1+XIO_WRONLY, xioopen_creat, GROUP_FD|GROUP_NAMED|GROUP_FILE, 0, 0, 0 HELP(":<filename>") };
  21
  22
  23 /* retrieve the mode option and perform the creat() call.
  24    returns the file descriptor or a negative value. */
  25 static int _xioopen_creat(const char *path, int rw, struct opt *opts) {
  26    mode_t mode = 0666;
  27    int fd;
  28
  29    retropt_modet(opts, OPT_PERM,      &mode);
  30
  31    if ((fd = Creat(path, mode)) < 0) {
  32       Error3("creat(\"%s\", 0%03o): %s",
  33              path, mode, strerror(errno));
  34       return STAT_RETRYLATER;
  35    }
  36    return fd;
  37 }
  38
  39
  40 static int xioopen_creat(
  41         int argc,
  42         const char *argv[],
  43         struct opt *opts,
  44         int xioflags,
  45         xiofile_t *xxfd,
  46         const struct addrdesc *addrdesc)
  47 {
  48    struct single *sfd = &xxfd->stream;
  49    const char *filename = argv[1];
  50    int rw = (xioflags&XIO_ACCMODE);
  51    bool exists;
  52    bool opt_unlink_close = false;
  53    int result;
  54
  55    /* remove old file, or set user/permissions on old file; parse options */
  56    if ((result =
  57         _xioopen_named_early(argc, argv, xxfd, addrdesc->groups, &exists, opts,
  58                              addrdesc->syntax))
  59        < 0) {
  60       return result;
  61    }
  62
  63    retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
  64    if (opt_unlink_close) {
  65       if ((sfd->unlink_close = strdup(filename)) == NULL) {
  66          Error1("strdup(\"%s\"): out of memory", filename);
  67       }
  68       sfd->opt_unlink_close = true;
  69    }
  70
  71    Notice2("creating regular file \"%s\" for %s", filename, ddirection[rw]);
  72    if ((result = _xioopen_creat(filename, rw, opts)) < 0)
  73       return result;
  74    sfd->fd = result;
  75
  76    applyopts_named(filename, opts, PH_PASTOPEN);
  77    if ((result = applyopts2(sfd, -1, opts, PH_PASTOPEN, PH_LATE2)) < 0)
  78       return result;
  79
  80    applyopts_cloexec(sfd->fd, opts);
  81
  82    applyopts_fchown(sfd->fd, opts);
  83
  84    if ((result = _xio_openlate(sfd, opts)) < 0)
  85       return result;
  86
  87    return 0;
  88 }
  89
  90 #endif /* WITH_CREAT */