xio-file.c

   1 /* source: xio-file.c */
   2 /* Copyright Gerhard Rieger 2001-2007 */
   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, unsigned groups, int dummy1, int dummy2, int dummy3);
  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 addr_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(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3) {
  76    const char *filename = argv[1];
  77    int rw = (xioflags & XIO_ACCMODE);
  78    bool exists;
  79    bool opt_unlink_close = false;
  80    int result;
  81
  82    /* remove old file, or set user/permissions on old file; parse options */
  83    if ((result = _xioopen_named_early(argc, argv, fd, groups, &exists, opts)) < 0) {
  84       return result;
  85    }
  86
  87    retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
  88    if (opt_unlink_close) {
  89       if ((fd->stream.unlink_close = strdup(filename)) == NULL) {
  90          Error1("strdup(\"%s\"): out of memory", filename);
  91       }
  92       fd->stream.opt_unlink_close = true;
  93    }
  94
  95    Notice3("opening %s \"%s\" for %s",
  96            filetypenames[(result&S_IFMT)>>12], filename, ddirection[rw]);
  97    if ((result = _xioopen_open(filename, rw, opts)) < 0)
  98       return result;
  99    fd->stream.fd = result;
 100
 101 #if WITH_TERMIOS
 102    if (Isatty(fd->stream.fd)) {
 103       if (Tcgetattr(fd->stream.fd, &fd->stream.savetty) < 0) {
 104          Warn2("cannot query current terminal settings on fd %d: %s",
 105                fd->stream.fd, strerror(errno));
 106       } else {
 107          fd->stream.ttyvalid = true;
 108       }
 109    }
 110 #endif /* WITH_TERMIOS */
 111
 112    applyopts_named(filename, opts, PH_FD);
 113    applyopts(fd->stream.fd, opts, PH_FD);
 114    applyopts_cloexec(fd->stream.fd, opts);
 115
 116    applyopts_fchown(fd->stream.fd, opts);
 117
 118    if ((result = _xio_openlate(&fd->stream, opts)) < 0)
 119       return result;
 120
 121    return 0;
 122 }
 123
 124 #endif /* _WITH_FILE */