summaryrefslogtreecommitdiff
path: root/execute.h
blob: 09e4367974da05e945c811f78f326ac1b3ee90f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
/*-*- Mode: C; c-basic-offset: 8 -*-*/

#ifndef fooexecutehfoo
#define fooexecutehfoo

typedef struct ExecStatus ExecStatus;
typedef struct ExecCommand ExecCommand;
typedef struct ExecContext ExecContext;

#include <sys/time.h>
#include <sys/resource.h>
#include <sys/capability.h>
#include <stdbool.h>
#include <stdio.h>
#include <sched.h>

#include "list.h"
#include "util.h"

/* Abstract namespace! */
#define LOGGER_SOCKET "/org/freedesktop.org/systemd1/logger"

typedef enum ExecOutput {
        EXEC_OUTPUT_CONSOLE,
        EXEC_OUTPUT_NULL,
        EXEC_OUTPUT_SYSLOG,
        EXEC_OUTPUT_KERNEL,
        _EXEC_OUTPUT_MAX,
        _EXEC_OUTPUT_INVALID = -1
} ExecOutput;

typedef enum ExecInput {
        EXEC_INPUT_NULL,
        EXEC_INPUT_CONSOLE,
        _EXEC_INPUT_MAX,
        _EXEC_INPUT_INVALID = -1
} ExecInput;

struct ExecStatus {
        pid_t pid;
        usec_t timestamp;
        int code;     /* as in siginfo_t::si_code */
        int status;   /* as in sigingo_t::si_status */
};

struct ExecCommand {
        char *path;
        char **argv;
        ExecStatus exec_status;
        LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */
};

struct ExecContext {
        char **environment;
        mode_t umask;
        struct rlimit *rlimit[RLIMIT_NLIMITS];
        char *working_directory, *root_directory;
        int oom_adjust;
        int nice;
        int ioprio;
        int cpu_sched_policy;
        int cpu_sched_priority;
        cpu_set_t cpu_affinity;
        unsigned long timer_slack_ns;

        bool oom_adjust_set:1;
        bool nice_set:1;
        bool ioprio_set:1;
        bool cpu_sched_set:1;
        bool cpu_affinity_set:1;
        bool timer_slack_ns_set:1;

        ExecInput input;
        ExecOutput output;
        int syslog_priority;
        char *syslog_identifier;

        /* FIXME: all privs related settings need to be enforced */
        cap_t capabilities;
        int secure_bits;
        uint64_t capability_bounding_set_drop;

        /* Since resolving these names might might involve socket
         * connections and we don't want to deadlock ourselves these
         * names are resolved on execution only and in the child
         * process. */
        char *user;
        char *group;
        char **supplementary_groups;
};

typedef enum ExitStatus {
        /* EXIT_SUCCESS defined by libc */
        /* EXIT_FAILURE defined by libc */
        EXIT_INVALIDARGUMENT = 2,
        EXIT_NOTIMPLEMENTED = 3,
        EXIT_NOPERMISSION = 4,
        EXIT_NOTINSTALLED = 5,
        EXIT_NOTCONFIGURED = 6,
        EXIT_NOTRUNNING = 7,

        /* The LSB suggests that error codes >= 200 are "reserved". We
         * use them here under the assumption that they hence are
         * unused by init scripts.
         *
         * http://refspecs.freestandards.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html */

        EXIT_CHDIR = 200,
        EXIT_NICE,
        EXIT_FDS,
        EXIT_EXEC,
        EXIT_MEMORY,
        EXIT_LIMITS,
        EXIT_OOM_ADJUST,
        EXIT_SIGNAL_MASK,
        EXIT_INPUT,
        EXIT_OUTPUT,
        EXIT_CHROOT,
        EXIT_PGID,
        EXIT_IOPRIO,
        EXIT_TIMERSLACK,
        EXIT_SECUREBITS,
        EXIT_SETSCHEDULER,
        EXIT_CPUAFFINITY
} ExitStatus;

int exec_spawn(const ExecCommand *command, const ExecContext *context, int *fds, unsigned n_fds, pid_t *ret);

void exec_command_free_list(ExecCommand *c);
void exec_command_free_array(ExecCommand **c, unsigned n);

char *exec_command_line(ExecCommand *c);
void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix);
void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix);

void exec_context_init(ExecContext *c);
void exec_context_done(ExecContext *c);
void exec_context_dump(ExecContext *c, FILE* f, const char *prefix);

void exec_status_fill(ExecStatus *s, pid_t pid, int code, int status);

const char* exec_output_to_string(ExecOutput i);
int exec_output_from_string(const char *s);

const char* exec_input_to_string(ExecInput i);
int exec_input_from_string(const char *s);

#endif