src/common/runas.h

   1 #ifndef _RUNAS_H
   2 #define _RUNAS_H
   3
   4 /*
   5  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   6  *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License, version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <stdint.h>
  23 #include <sys/types.h>
  24 #include <unistd.h>
  25
  26 /*
  27  * The run-as process is launched by forking without an exec*() call. This means
  28  * that any resource allocated before the run-as worker is launched should be
  29  * cleaned-up after the fork(). This callback allows the user to perform this
  30  * clean-up.
  31  *
  32  * Note that the callback will _not_ be invoked if the LTTNG_DEBUG_NOCLONE
  33  * environment variable is set as the clean-up is not needed (and may not be
  34  * expected).
  35  *
  36  * A negative return value will cause the run-as process to exit with a non-zero
  37  * value.
  38  */
  39 typedef int (*post_fork_cleanup_cb)(void *user_data);
  40
  41 LTTNG_HIDDEN
  42 int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid);
  43 LTTNG_HIDDEN
  44 int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid);
  45 LTTNG_HIDDEN
  46 int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid);
  47 LTTNG_HIDDEN
  48 int run_as_unlink(const char *path, uid_t uid, gid_t gid);
  49 LTTNG_HIDDEN
  50 int run_as_rmdir_recursive(const char *path, uid_t uid, gid_t gid);
  51 LTTNG_HIDDEN
  52 int run_as_extract_elf_symbol_offset(int fd, const char* function,
  53                 uid_t uid, gid_t gid, uint64_t *offset);
  54 LTTNG_HIDDEN
  55 int run_as_extract_sdt_probe_offsets(int fd, const char *provider_name,
  56                 const char* probe_name, uid_t uid, gid_t gid,
  57                 uint64_t **offsets, uint32_t *num_offset);
  58 LTTNG_HIDDEN
  59 int run_as_create_worker(const char *procname,
  60                 post_fork_cleanup_cb clean_up_func, void *clean_up_user_data);
  61 LTTNG_HIDDEN
  62 void run_as_destroy_worker(void);
  63
  64 #endif /* _RUNAS_H */