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David Oberhollenzer
87a524d931
- exec_t belongs to service.h, the main place where it is used/needed
- code for executing exec_t is moved to runsvc for the same reason
- what is left are NORETURN and ARRAY_SIZE
- the former can be replaced with direct attribute usage since
the only relevant compilers all support the attribute.
- the later is only used in 3 places and can be trivially replaced
with direct usage of sizeof().
Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
/* SPDX-License-Identifier: ISC */
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#ifndef SERVICE_H
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#define SERVICE_H
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#include <sys/types.h>
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typedef struct exec_t {
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struct exec_t *next;
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int argc; /* number of elements in argument vector */
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char args[]; /* argument vectot string blob */
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} exec_t;
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enum {
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/*
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Start the service in the background and continue with
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other services. The service will eventually terminate.
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*/
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SVC_ONCE = 0,
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SVC_WAIT, /* run service and wait until it finishes */
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/*
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Similar to SVC_ONCE, but restart the service when
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it terminates.
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*/
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SVC_RESPAWN,
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SVC_MAX
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};
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enum {
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TGT_BOOT = 0, /* run service when the system boots */
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TGT_SHUTDOWN, /* run service when at system shut down */
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TGT_REBOOT, /* run service when during system reboot */
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TGT_MAX
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};
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enum {
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RDSVC_NO_FNAME = 0x01, /* do not store a copy of the filename */
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RDSVC_NO_EXEC = 0x02, /* do not store executable script */
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RDSVC_NO_CTTY = 0x04, /* do not store the controlling tty */
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RDSVC_NO_DEPS = 0x08, /* do not store dependencies */
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RDSVC_NO_DESC = 0x10, /* do not store description */
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};
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enum {
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/* truncate stdout */
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SVC_FLAG_TRUNCATE_OUT = 0x01,
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SVC_FLAG_HAS_EXEC = 0x10,
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SVC_FLAG_ADMIN_STOPPED = 0x20,
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};
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typedef struct service_t {
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struct service_t *next;
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char *fname; /* source file name */
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int type; /* SVC_* service type */
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int target; /* TGT_* service target */
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char *desc; /* description string */
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char *ctty; /* controlling tty or log file */
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int rspwn_limit; /* maximum respawn count */
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int rspwn_count; /* services respawn counter */
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unsigned int flags; /* SVC_FLAG_* bit field */
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/* linked list of command lines to execute */
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exec_t *exec;
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char *before; /* services that must be executed later */
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char *after; /* services that must be executed first */
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int num_before;
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int num_after;
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pid_t pid;
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int status; /* process exit status */
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int id; /* service ID used by initd */
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char name[]; /* canonical service name */
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} service_t;
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typedef struct {
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service_t *targets[TGT_MAX];
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} service_list_t;
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/*
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Read a service from a file.
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*/
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service_t *rdsvc(int dirfd, const char *filename, int flags);
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void delsvc(service_t *svc);
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/*
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Rebuild a service list by scanning a directory and parsing all
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service descriptions.
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Returns 0 on success, -1 on failure. The function takes care of
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printing error messages on failure.
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*/
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int svcscan(const char *directory, service_list_t *list, int flags);
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void del_svc_list(service_list_t *list);
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/*
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Sort a list of services by dependencies.
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*/
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service_t *svc_tsort(service_t *list);
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const char *svc_type_to_string(int type);
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int svc_type_from_string(const char *type);
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const char *svc_target_to_string(int target);
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int svc_target_from_string(const char *target);
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#endif /* SERVICE_H */
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