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  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-only
   9  *
  10  */
  11
  12 #include <stdint.h>
  13 #include <sys/types.h>
  14 #include <unistd.h>
  15
  16 #include <common/macros.h>
  17 #include <common/sessiond-comm/sessiond-comm.h>
  18
  19 /*
  20  * The run-as process is launched by forking without an exec*() call. This means
  21  * that any resource allocated before the run-as worker is launched should be
  22  * cleaned-up after the fork(). This callback allows the user to perform this
  23  * clean-up.
  24  *
  25  * Note that the callback will _not_ be invoked if the LTTNG_DEBUG_NOCLONE
  26  * environment variable is set as the clean-up is not needed (and may not be
  27  * expected).
  28  *
  29  * A negative return value will cause the run-as process to exit with a non-zero
  30  * value.
  31  */
  32 typedef int (*post_fork_cleanup_cb)(void *user_data);
  33
  34 LTTNG_HIDDEN
  35 int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid);
  36 LTTNG_HIDDEN
  37 int run_as_mkdirat_recursive(int dirfd, const char *path, mode_t mode,
  38                 uid_t uid, gid_t gid);
  39 LTTNG_HIDDEN
  40 int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid);
  41 LTTNG_HIDDEN
  42 int run_as_mkdirat(int dirfd, const char *path, mode_t mode,
  43                 uid_t uid, gid_t gid);
  44 LTTNG_HIDDEN
  45 int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid);
  46 LTTNG_HIDDEN
  47 int run_as_openat(int dirfd, const char *filename, int flags, mode_t mode,
  48                 uid_t uid, gid_t gid);
  49 LTTNG_HIDDEN
  50 int run_as_unlink(const char *path, uid_t uid, gid_t gid);
  51 LTTNG_HIDDEN
  52 int run_as_unlinkat(int dirfd, const char *filename, uid_t uid, gid_t gid);
  53 LTTNG_HIDDEN
  54 int run_as_rmdir(const char *path, uid_t uid, gid_t gid);
  55 LTTNG_HIDDEN
  56 int run_as_rmdir_recursive(const char *path, uid_t uid, gid_t gid, int flags);
  57 LTTNG_HIDDEN
  58 int run_as_rmdirat(int dirfd, const char *path, uid_t uid, gid_t gid);
  59 LTTNG_HIDDEN
  60 int run_as_rmdirat_recursive(int dirfd, const char *path, uid_t uid, gid_t gid, int flags);
  61 LTTNG_HIDDEN
  62 int run_as_rename(const char *old, const char *new, uid_t uid, gid_t gid);
  63 LTTNG_HIDDEN
  64 int run_as_renameat(int old_dirfd, const char *old,
  65                 int new_dirfd, const char *new, uid_t uid, gid_t gid);
  66 LTTNG_HIDDEN
  67 int run_as_extract_elf_symbol_offset(int fd, const char* function,
  68                 uid_t uid, gid_t gid, uint64_t *offset);
  69 LTTNG_HIDDEN
  70 int run_as_extract_sdt_probe_offsets(int fd, const char *provider_name,
  71                 const char* probe_name, uid_t uid, gid_t gid,
  72                 uint64_t **offsets, uint32_t *num_offset);
  73 LTTNG_HIDDEN
  74 int run_as_generate_filter_bytecode(const char *filter_expression,
  75                 const struct lttng_credentials *creds,
  76                 struct lttng_bytecode **bytecode);
  77 LTTNG_HIDDEN
  78 int run_as_create_worker(const char *procname,
  79                 post_fork_cleanup_cb clean_up_func, void *clean_up_user_data);
  80 LTTNG_HIDDEN
  81 void run_as_destroy_worker(void);
  82
  83 #endif /* _RUNAS_H */