mirror of
https://github.com/moparisthebest/socat
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217 lines
6.9 KiB
C
217 lines
6.9 KiB
C
/* source: xio-named.c */
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/* Copyright Gerhard Rieger 2001-2008 */
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/* Published under the GNU General Public License V.2, see file COPYING */
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/* this file contains the source for filesystem entry functions */
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#include "xiosysincludes.h"
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#if _WITH_NAMED
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#include "xioopen.h"
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#include "xio-named.h"
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#if WITH_NAMED
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const struct optdesc opt_group_early = { "group-early", NULL, OPT_GROUP_EARLY, GROUP_NAMED, PH_PREOPEN, TYPE_GIDT, OFUNC_SPEC };
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const struct optdesc opt_perm_early = { "perm-early", NULL, OPT_PERM_EARLY, GROUP_NAMED, PH_PREOPEN, TYPE_MODET,OFUNC_SPEC };
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const struct optdesc opt_user_early = { "user-early", NULL, OPT_USER_EARLY, GROUP_NAMED, PH_PREOPEN, TYPE_UIDT, OFUNC_SPEC };
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/*0 const struct optdesc opt_force = { "force", NULL, OPT_FORCE, GROUP_NAMED, PH_???, TYPE_BOOL, OFUNC_SPEC };*/
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const struct optdesc opt_unlink = { "unlink", NULL, OPT_UNLINK, GROUP_NAMED, PH_PREOPEN, TYPE_BOOL, OFUNC_SPEC };
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const struct optdesc opt_unlink_early= { "unlink-early",NULL, OPT_UNLINK_EARLY,GROUP_NAMED, PH_EARLY, TYPE_BOOL, OFUNC_SPEC };
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const struct optdesc opt_unlink_late = { "unlink-late", NULL, OPT_UNLINK_LATE, GROUP_NAMED, PH_PASTOPEN, TYPE_BOOL, OFUNC_SPEC };
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const struct optdesc opt_unlink_close = { "unlink-close", NULL, OPT_UNLINK_CLOSE, GROUP_NAMED, PH_LATE, TYPE_BOOL, OFUNC_SPEC };
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const struct optdesc opt_umask = { "umask", NULL, OPT_UMASK, GROUP_NAMED, PH_EARLY, TYPE_MODET, OFUNC_SPEC };
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#endif /* WITH_NAMED */
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/* applies to fd all options belonging to phase */
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int applyopts_named(const char *filename, struct opt *opts, unsigned int phase) {
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struct opt *opt;
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if (!opts) return 0;
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opt = opts; while (opt->desc != ODESC_END) {
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if (opt->desc == ODESC_DONE ||
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opt->desc->phase != phase && phase != PH_ALL ||
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!(opt->desc->group & GROUP_NAMED)) {
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++opt; continue; }
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switch (opt->desc->optcode) {
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case OPT_GROUP_EARLY:
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case OPT_GROUP:
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if (Chown(filename, -1, opt->value.u_gidt) < 0) {
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Error3("chown(\"%s\", -1, "F_gid"): %s", filename,
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opt->value.u_gidt, strerror(errno));
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}
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break;
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case OPT_USER_EARLY:
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case OPT_USER:
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if (Chown(filename, opt->value.u_uidt, -1) < 0) {
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Error3("chown(\"%s\", "F_uid", -1): %s", filename,
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opt->value.u_uidt, strerror(errno));
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}
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break;
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case OPT_PERM_EARLY:
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case OPT_PERM:
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if (Chmod(filename, opt->value.u_modet) < 0) {
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Error3("chmod(\"%s\", "F_mode"): %s",
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filename, opt->value.u_modet, strerror(errno));
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}
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break;
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case OPT_UNLINK_EARLY:
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case OPT_UNLINK:
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case OPT_UNLINK_LATE:
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if (Unlink(filename) < 0) {
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if (errno == ENOENT) {
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Warn2("unlink(\"%s\"): %s", filename, strerror(errno));
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} else {
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Error2("unlink(\"%s\"): %s", filename, strerror(errno));
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}
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}
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break;
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case OPT_UMASK:
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if (Umask(opt->value.u_modet) < 0) {
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/* linux docu says it always succeeds, but who believes it? */
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Error2("umask("F_mode"): %s", opt->value.u_modet, strerror(errno));
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}
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break;
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default: Error1("applyopts_named(): option \"%s\" not implemented",
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opt->desc->defname);
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break;
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}
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opt->desc = ODESC_DONE;
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++opt;
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}
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return 0;
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}
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/* perform actions that are common to all NAMED group addresses: checking if
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the entry exists, parsing options, ev.removing old filesystem entry or
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setting early owners and permissions.
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It applies options of PH_EARLY and PH_PREOPEN.
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If the path exists, its st_mode field is returned.
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After this sub you may proceed with open() or whatever...
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*/
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int _xioopen_named_early(int argc, const char *argv[], xiofile_t *xfd,
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int groups,
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bool *exists, struct opt *opts) {
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const char *path = argv[1];
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unsigned int iogroups = 0;
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#if HAVE_STAT64
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struct stat64 statbuf;
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#else
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struct stat statbuf;
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#endif /* !HAVE_STAT64 */
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bool opt_unlink_early = false;
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if (argc != 2) {
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Error2("%s: wrong number of parameters (%d instead of 1)", argv[0]?argv[0]:"<named>", argc);
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}
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statbuf.st_mode = 0;
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/* find the appropriate groupbits */
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if (
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#if HAVE_STAT64
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Stat64(path, &statbuf) < 0
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#else
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Stat(path, &statbuf) < 0
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#endif /* !HAVE_STAT64 */
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) {
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if (errno != ENOENT) {
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Error2("stat(\"%s\"): %s", path, strerror(errno));
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return STAT_RETRYLATER;
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}
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iogroups = GROUP_REG;
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*exists = false;
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} else {
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iogroups = _groupbits(statbuf.st_mode);
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*exists = true;
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}
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if (applyopts_single(&xfd->stream, opts, PH_INIT) < 0) return -1;
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applyopts(-1, opts, PH_INIT);
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retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
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if (*exists && opt_unlink_early) {
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Info1("\"%s\" already exists; removing it", path);
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if (Unlink(path) < 0) {
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Error2("unlink(\"%s\"): %s", path, strerror(errno));
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*exists = true;
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} else {
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*exists = false;
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}
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}
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applyopts(-1, opts, PH_EARLY);
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applyopts_named(path, opts, PH_EARLY);
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if (*exists) {
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applyopts_named(path, opts, PH_PREOPEN);
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} else {
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dropopts(opts, PH_PREOPEN);
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}
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return statbuf.st_mode;
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}
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/* retrieve the OPEN group options and perform the open() call.
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returns the file descriptor or a negative value.
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Applies options of phases PREOPEN, OPEN, PASTOPEN, and FD
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*/
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int _xioopen_open(const char *path, int rw, struct opt *opts) {
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mode_t mode = 0666;
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flags_t flags = rw;
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bool flag;
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int fd;
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applyopts_named(path, opts, PH_PREOPEN);
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/* this only applies pure OPEN flags, not mixed OPEN/FCNTL options */
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applyopts_flags(opts, GROUP_OPEN, &flags);
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/* we have to handle mixed OPEN/FCNTL flags specially */
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if (retropt_bool(opts, OPT_O_APPEND, &flag) >= 0 && flag)
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flags |= O_APPEND;
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if (retropt_bool(opts, OPT_O_NONBLOCK, &flag) >= 0 && flag)
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flags |= O_NONBLOCK;
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#ifdef O_ASYNC
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if (retropt_bool(opts, OPT_O_ASYNC, &flag) >= 0 && flag)
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flags |= O_ASYNC;
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#endif
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if (retropt_bool(opts, OPT_O_TRUNC, &flag) >= 0 && flag)
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flags |= O_TRUNC;
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#ifdef O_BINARY
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if (retropt_bool(opts, OPT_O_BINARY, &flag) >= 0 && flag)
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flags |= O_BINARY;
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#endif
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#ifdef O_TEXT
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if (retropt_bool(opts, OPT_O_TEXT, &flag) >= 0 && flag)
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flags |= O_TEXT;
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#endif
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#ifdef O_NOINHERIT
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if (retropt_bool(opts, OPT_O_NOINHERIT, &flag) >= 0 && flag)
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flags |= O_NOINHERIT;
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#endif
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#ifdef O_NOATIME
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if (retropt_bool(opts, OPT_O_NOATIME, &flag) >= 0 && flag)
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flags |= O_NOATIME;
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#endif
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retropt_modet(opts, OPT_PERM, &mode);
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if ((fd = Open(path, flags, mode)) < 0) {
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Error4("open(\"%s\", 0%lo, 0%03o): %s",
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path, flags, mode, strerror(errno));
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return STAT_RETRYLATER;
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}
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/*0 Info4("open(\"%s\", 0%o, 0%03o) -> %d", path, flags, mode, fd);*/
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applyopts_named(path, opts, PH_PASTOPEN);
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#if 0
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applyopts_named(path, opts, PH_FD);
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applyopts(fd, opts, PH_FD);
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applyopts_cloexec(fd, opts);
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#endif
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return fd;
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}
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#endif /* _WITH_NAMED */
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