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Diffstat (limited to '')
| -rw-r--r-- | src/shared/install.h | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/src/shared/install.h b/src/shared/install.h new file mode 100644 index 0000000..bc0c6db --- /dev/null +++ b/src/shared/install.h @@ -0,0 +1,244 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <stdbool.h> + +typedef enum UnitFilePresetMode UnitFilePresetMode; +typedef enum InstallChangeType InstallChangeType; +typedef enum UnitFileFlags UnitFileFlags; +typedef enum InstallMode InstallMode; +typedef struct InstallChange InstallChange; +typedef struct UnitFileList UnitFileList; +typedef struct InstallInfo InstallInfo; + +#include "hashmap.h" +#include "macro.h" +#include "path-lookup.h" +#include "strv.h" +#include "unit-file.h" +#include "unit-name.h" + +enum UnitFilePresetMode { + UNIT_FILE_PRESET_FULL, + UNIT_FILE_PRESET_ENABLE_ONLY, + UNIT_FILE_PRESET_DISABLE_ONLY, + _UNIT_FILE_PRESET_MODE_MAX, + _UNIT_FILE_PRESET_MODE_INVALID = -EINVAL, +}; + +enum InstallChangeType { + INSTALL_CHANGE_SYMLINK, + INSTALL_CHANGE_UNLINK, + INSTALL_CHANGE_IS_MASKED, + INSTALL_CHANGE_IS_MASKED_GENERATOR, + INSTALL_CHANGE_IS_DANGLING, + INSTALL_CHANGE_DESTINATION_NOT_PRESENT, + INSTALL_CHANGE_AUXILIARY_FAILED, + _INSTALL_CHANGE_TYPE_MAX, + _INSTALL_CHANGE_INVALID = -EINVAL, + _INSTALL_CHANGE_ERRNO_MAX = -ERRNO_MAX, /* Ensure this type covers the whole negative errno range */ +}; + +static inline bool INSTALL_CHANGE_TYPE_VALID(InstallChangeType t) { + return t >= _INSTALL_CHANGE_ERRNO_MAX && t < _INSTALL_CHANGE_TYPE_MAX; +} + +enum UnitFileFlags { + UNIT_FILE_RUNTIME = 1 << 0, /* Public API via DBUS, do not change */ + UNIT_FILE_FORCE = 1 << 1, /* Public API via DBUS, do not change */ + UNIT_FILE_PORTABLE = 1 << 2, /* Public API via DBUS, do not change */ + UNIT_FILE_DRY_RUN = 1 << 3, + UNIT_FILE_IGNORE_AUXILIARY_FAILURE = 1 << 4, + _UNIT_FILE_FLAGS_MASK_PUBLIC = UNIT_FILE_RUNTIME|UNIT_FILE_PORTABLE|UNIT_FILE_FORCE, +}; + +/* type can be either one of the INSTALL_CHANGE_SYMLINK, INSTALL_CHANGE_UNLINK, … listed above, or a negative + * errno value. + * + * If source is specified, it should be the contents of the path symlink. In case of an error, source should + * be the existing symlink contents or NULL. */ +struct InstallChange { + int type; /* INSTALL_CHANGE_SYMLINK, … if positive, errno if negative */ + char *path; + char *source; +}; + +static inline bool install_changes_have_modification(const InstallChange* changes, size_t n_changes) { + for (size_t i = 0; i < n_changes; i++) + if (IN_SET(changes[i].type, INSTALL_CHANGE_SYMLINK, INSTALL_CHANGE_UNLINK)) + return true; + return false; +} + +struct UnitFileList { + char *path; + UnitFileState state; +}; + +enum InstallMode { + INSTALL_MODE_REGULAR, + INSTALL_MODE_LINKED, + INSTALL_MODE_ALIAS, + INSTALL_MODE_MASKED, + _INSTALL_MODE_MAX, + _INSTALL_MODE_INVALID = -EINVAL, +}; + +struct InstallInfo { + char *name; + char *path; + char *root; + + char **aliases; + char **wanted_by; + char **required_by; + char **upheld_by; + char **also; + + char *default_instance; + char *symlink_target; + + InstallMode install_mode; + bool auxiliary; +}; + +int unit_file_enable( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names_or_paths, + InstallChange **changes, + size_t *n_changes); +int unit_file_disable( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names, + InstallChange **changes, + size_t *n_changes); +int unit_file_reenable( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names_or_paths, + InstallChange **changes, + size_t *n_changes); +int unit_file_preset( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names, + UnitFilePresetMode mode, + InstallChange **changes, + size_t *n_changes); +int unit_file_preset_all( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + UnitFilePresetMode mode, + InstallChange **changes, + size_t *n_changes); +int unit_file_mask( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names, + InstallChange **changes, + size_t *n_changes); +int unit_file_unmask( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names, + InstallChange **changes, + size_t *n_changes); +int unit_file_link( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **files, + InstallChange **changes, + size_t *n_changes); +int unit_file_revert( + RuntimeScope scope, + const char *root_dir, + char **names, + InstallChange **changes, + size_t *n_changes); +int unit_file_set_default( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + const char *name, + InstallChange **changes, + size_t *n_changes); +int unit_file_get_default( + RuntimeScope scope, + const char *root_dir, + char **name); +int unit_file_add_dependency( + RuntimeScope scope, + UnitFileFlags flags, + const char *root_dir, + char **names, + const char *target, + UnitDependency dep, + InstallChange **changes, + size_t *n_changes); + +int unit_file_lookup_state( + RuntimeScope scope, + const LookupPaths *paths, + const char *name, + UnitFileState *ret); + +int unit_file_get_state(RuntimeScope scope, const char *root_dir, const char *filename, UnitFileState *ret); +int unit_file_exists(RuntimeScope scope, const LookupPaths *paths, const char *name); + +int unit_file_get_list(RuntimeScope scope, const char *root_dir, Hashmap *h, char **states, char **patterns); + +extern const struct hash_ops unit_file_list_hash_ops_free; + +InstallChangeType install_changes_add(InstallChange **changes, size_t *n_changes, InstallChangeType type, const char *path, const char *source); +void install_changes_free(InstallChange *changes, size_t n_changes); +void install_changes_dump(int r, const char *verb, const InstallChange *changes, size_t n_changes, bool quiet); + +int unit_file_verify_alias( + const InstallInfo *info, + const char *dst, + char **ret_dst, + InstallChange **changes, + size_t *n_changes); + +typedef struct UnitFilePresetRule UnitFilePresetRule; + +typedef struct { + UnitFilePresetRule *rules; + size_t n_rules; + bool initialized; +} UnitFilePresets; + +typedef enum PresetAction { + PRESET_UNKNOWN, + PRESET_ENABLE, + PRESET_DISABLE, + PRESET_IGNORE, + _PRESET_ACTION_MAX, + _PRESET_ACTION_INVALID = -EINVAL, + _PRESET_ACTION_ERRNO_MAX = -ERRNO_MAX, /* Ensure this type covers the whole negative errno range */ +} PresetAction; + +const char *preset_action_past_tense_to_string(PresetAction action); + +void unit_file_presets_done(UnitFilePresets *p); +PresetAction unit_file_query_preset(RuntimeScope scope, const char *root_dir, const char *name, UnitFilePresets *cached); + +const char *unit_file_state_to_string(UnitFileState s) _const_; +UnitFileState unit_file_state_from_string(const char *s) _pure_; +/* from_string conversion is unreliable because of the overlap between -EPERM and -1 for error. */ + +const char *install_change_type_to_string(InstallChangeType t) _const_; +InstallChangeType install_change_type_from_string(const char *s) _pure_; + +const char *unit_file_preset_mode_to_string(UnitFilePresetMode m) _const_; +UnitFilePresetMode unit_file_preset_mode_from_string(const char *s) _pure_; |