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, unsigned groups, int dummy1, int dummy2, int dummy3);
  17
  18
  19 /*! within stream model, this is a write-only address - use 2 instead of 3 */
  20 const struct addrdesc addr_creat  = { "create", 3, 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(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3) {
  41    const char *filename = argv[1];
  42    int rw = (xioflags&XIO_ACCMODE);
  43    bool exists;
  44    bool opt_unlink_close = false;
  45    int result;
  46
  47    /* remove old file, or set user/permissions on old file; parse options */
  48    if ((result = _xioopen_named_early(argc, argv, fd, groups, &exists, opts)) < 0) {
  49       return result;
  50    }
  51
  52    retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
  53    if (opt_unlink_close) {
  54       if ((fd->stream.unlink_close = strdup(filename)) == NULL) {
  55          Error1("strdup(\"%s\"): out of memory", filename);
  56       }
  57       fd->stream.opt_unlink_close = true;
  58    }
  59
  60    Notice2("creating regular file \"%s\" for %s", filename, ddirection[rw]);
  61    if ((result = _xioopen_creat(filename, rw, opts)) < 0)
  62       return result;
  63    fd->stream.fd = result;
  64
  65    applyopts_named(filename, opts, PH_PASTOPEN);
  66    if ((result = applyopts2(fd->stream.fd, opts, PH_PASTOPEN, PH_LATE2)) < 0)
  67       return result;
  68
  69    applyopts_cloexec(fd->stream.fd, opts);
  70
  71    applyopts_fchown(fd->stream.fd, opts);
  72
  73    if ((result = _xio_openlate(&fd->stream, opts)) < 0)
  74       return result;
  75
  76    return 0;
  77 }
  78
  79 #endif /* WITH_CREAT */