xio-file.c

   1 /* source: xio-file.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 open type */
   6
   7 #include "xiosysincludes.h"
   8 #include "xioopen.h"
   9
  10 #include "xio-named.h"
  11 #include "xio-file.h"
  12
  13
  14 static int xioopen_open(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, const struct addrdesc *addrdesc);
  15
  16
  17 #if WITH_OPEN
  18
  19 /****** OPEN addresses ******/
  20 const struct optdesc opt_o_rdonly    = { "o-rdonly",    "rdonly", OPT_O_RDONLY,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG_PATTERN, O_RDONLY, O_ACCMODE };
  21 const struct optdesc opt_o_wronly    = { "o-wronly",    "wronly", OPT_O_WRONLY,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG_PATTERN, O_WRONLY, O_ACCMODE };
  22 const struct optdesc opt_o_rdwr      = { "o-rdwr",      "rdwr",   OPT_O_RDWR,      GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG_PATTERN, O_RDWR,   O_ACCMODE };
  23 const struct optdesc opt_o_create    = { "o-create",    "creat",  OPT_O_CREATE,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_CREAT };
  24 const struct optdesc opt_o_excl      = { "o-excl",      "excl",   OPT_O_EXCL,      GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_EXCL };
  25 const struct optdesc opt_o_noctty    = { "o-noctty",    "noctty", OPT_O_NOCTTY,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_NOCTTY };
  26 #ifdef O_SYNC
  27 const struct optdesc opt_o_sync      = { "o-sync",      "sync",   OPT_O_SYNC,      GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_SYNC };
  28 #endif
  29 #ifdef O_NOFOLLOW
  30 const struct optdesc opt_o_nofollow  = { "o-nofollow",  "nofollow",OPT_O_NOFOLLOW, GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_NOFOLLOW };
  31 #endif
  32 #ifdef O_DIRECTORY
  33 const struct optdesc opt_o_directory = { "o-directory", "directory",OPT_O_DIRECTORY, GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_DIRECTORY };
  34 #endif
  35 #ifdef O_LARGEFILE
  36 const struct optdesc opt_o_largefile = { "o-largefile", "largefile",OPT_O_LARGEFILE, GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_LARGEFILE };
  37 #endif
  38 #ifdef O_NSHARE
  39 const struct optdesc opt_o_nshare    = { "o-nshare",    "nshare", OPT_O_NSHARE,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_NSHARE };
  40 #endif
  41 #ifdef O_RSHARE
  42 const struct optdesc opt_o_rshare    = { "o-rshare",    "rshare", OPT_O_RSHARE,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_RSHARE };
  43 #endif
  44 #ifdef O_DEFER
  45 const struct optdesc opt_o_defer     = { "o-defer",     "defer",  OPT_O_DEFER,     GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_DEFER };
  46 #endif
  47 #ifdef O_DIRECT
  48 const struct optdesc opt_o_direct    = { "o-direct",    "direct", OPT_O_DIRECT,    GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_DIRECT };
  49 #endif
  50 #ifdef O_DSYNC
  51 const struct optdesc opt_o_dsync     = { "o-dsync",     "dsync",  OPT_O_DSYNC,     GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_DSYNC };
  52 #endif
  53 #ifdef O_RSYNC
  54 const struct optdesc opt_o_rsync     = { "o-rsync",     "rsync",  OPT_O_RSYNC,     GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_RSYNC };
  55 #endif
  56 #ifdef O_DELAY
  57 const struct optdesc opt_o_delay     = { "o-delay",     "delay",  OPT_O_DELAY,     GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_DELAY };
  58 #endif
  59 #ifdef O_PRIV
  60 const struct optdesc opt_o_priv      = { "o-priv",      "priv",   OPT_O_PRIV,      GROUP_OPEN, PH_OPEN, TYPE_BOOL, OFUNC_FLAG, O_PRIV };
  61 #endif
  62 const struct optdesc opt_o_trunc     = { "o-trunc",     "trunc",  OPT_O_TRUNC,     GROUP_OPEN, PH_LATE, TYPE_BOOL, OFUNC_FLAG, O_TRUNC };
  63
  64 #endif /* WITH_OPEN */
  65
  66
  67 #if _WITH_FILE  /*! inconsistent name FILE vs. OPEN */
  68
  69 const struct addrdesc xioaddr_open   = { "OPEN",   3, xioopen_open, GROUP_FD|GROUP_FIFO|GROUP_CHR|GROUP_BLK|GROUP_REG|GROUP_NAMED|GROUP_OPEN|GROUP_FILE|GROUP_TERMIOS, 0, 0, 0 HELP(":<filename>") };
  70
  71 /* open for writing:
  72    if the filesystem entry already exists, the data is appended
  73    if it does not exist, a file is created and the data is appended
  74 */
  75 static int xioopen_open(
  76         int argc,
  77         const char *argv[],
  78         struct opt *opts,
  79         int xioflags,
  80         xiofile_t *xfd,
  81         const struct addrdesc *addrdesc)
  82 {
  83    const char *filename = argv[1];
  84    int rw = (xioflags & XIO_ACCMODE);
  85    struct single *sfd = &xfd->stream;
  86    bool exists;
  87    bool opt_unlink_close = false;
  88    int result;
  89
  90    /* remove old file, or set user/permissions on old file; parse options */
  91    if ((result =
  92         _xioopen_named_early(argc, argv, xfd, addrdesc->groups, &exists, opts,
  93                              addrdesc->syntax))
  94        < 0) {
  95       return result;
  96    }
  97
  98    retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
  99    if (opt_unlink_close) {
 100       if ((sfd->unlink_close = strdup(filename)) == NULL) {
 101          Error1("strdup(\"%s\"): out of memory", filename);
 102       }
 103       sfd->opt_unlink_close = true;
 104    }
 105
 106    Notice3("opening %s \"%s\" for %s",
 107            filetypenames[(result&S_IFMT)>>12], filename, ddirection[rw]);
 108    if ((result = _xioopen_open(filename, rw, opts)) < 0)
 109       return result;
 110    sfd->fd = result;
 111
 112 #if WITH_TERMIOS
 113    if (Isatty(sfd->fd)) {
 114       if (Tcgetattr(sfd->fd, &sfd->savetty) < 0) {
 115          Warn2("cannot query current terminal settings on fd %d: %s",
 116                sfd->fd, strerror(errno));
 117       } else {
 118          sfd->ttyvalid = true;
 119       }
 120    }
 121 #endif /* WITH_TERMIOS */
 122
 123    applyopts_named(filename, opts, PH_FD);
 124    applyopts(sfd, -1, opts, PH_FD);
 125    applyopts_cloexec(sfd->fd, opts);
 126
 127    applyopts_fchown(sfd->fd, opts);
 128
 129    if ((result = _xio_openlate(sfd, opts)) < 0)
 130       return result;
 131
 132    return 0;
 133 }
 134
 135 #endif /* _WITH_FILE */