nmstate-clib 2.2.43

Nmstate C binding
Documentation 
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
149
150
151
152
153

// SPDX-License-Identifier: Apache-2.0

use std::ffi::{CStr, CString};
use std::time::SystemTime;

use libc::{c_char, c_int};

use crate::{init_logger, NMSTATE_FAIL, NMSTATE_PASS};

#[allow(clippy::not_unsafe_ptr_arg_deref)]
#[no_mangle]
pub extern "C" fn nmstate_checkpoint_commit(
    checkpoint: *const c_char,
    log: *mut *mut c_char,
    err_kind: *mut *mut c_char,
    err_msg: *mut *mut c_char,
) -> c_int {
    assert!(!log.is_null());
    assert!(!err_kind.is_null());
    assert!(!err_msg.is_null());

    unsafe {
        *log = std::ptr::null_mut();
        *err_kind = std::ptr::null_mut();
        *err_msg = std::ptr::null_mut();
    }

    let logger = match init_logger() {
        Ok(l) => l,
        Err(e) => {
            unsafe {
                *err_msg = CString::new(format!("Failed to setup logger: {e}"))
                    .unwrap()
                    .into_raw();
            }
            return NMSTATE_FAIL;
        }
    };
    let now = SystemTime::now();

    let mut checkpoint_str = "";
    if !checkpoint.is_null() {
        let checkpoint_cstr = unsafe { CStr::from_ptr(checkpoint) };
        checkpoint_str = match checkpoint_cstr.to_str() {
            Ok(s) => s,
            Err(e) => {
                unsafe {
                    *err_msg = CString::new(format!(
                        "Error on converting C char to rust str: {e}"
                    ))
                    .unwrap()
                    .into_raw();
                    *err_kind = CString::new(format!(
                        "{}",
                        nmstate::ErrorKind::InvalidArgument
                    ))
                    .unwrap()
                    .into_raw();
                }
                return NMSTATE_FAIL;
            }
        }
    }

    let result = nmstate::NetworkState::checkpoint_commit(checkpoint_str);
    unsafe {
        *log = CString::new(logger.drain(now)).unwrap().into_raw();
    }

    if let Err(e) = result {
        unsafe {
            *err_msg = CString::new(e.msg()).unwrap().into_raw();
            *err_kind =
                CString::new(format!("{}", &e.kind())).unwrap().into_raw();
        }
        NMSTATE_FAIL
    } else {
        NMSTATE_PASS
    }
}

#[allow(clippy::not_unsafe_ptr_arg_deref)]
#[no_mangle]
pub extern "C" fn nmstate_checkpoint_rollback(
    checkpoint: *const c_char,
    log: *mut *mut c_char,
    err_kind: *mut *mut c_char,
    err_msg: *mut *mut c_char,
) -> c_int {
    assert!(!log.is_null());
    assert!(!err_kind.is_null());
    assert!(!err_msg.is_null());

    unsafe {
        *log = std::ptr::null_mut();
        *err_kind = std::ptr::null_mut();
        *err_msg = std::ptr::null_mut();
    }

    let logger = match init_logger() {
        Ok(l) => l,
        Err(e) => {
            unsafe {
                *err_msg = CString::new(format!("Failed to setup logger: {e}"))
                    .unwrap()
                    .into_raw();
            }
            return NMSTATE_FAIL;
        }
    };
    let now = SystemTime::now();

    let mut checkpoint_str = "";
    if !checkpoint.is_null() {
        let checkpoint_cstr = unsafe { CStr::from_ptr(checkpoint) };
        checkpoint_str = match checkpoint_cstr.to_str() {
            Ok(s) => s,
            Err(e) => {
                unsafe {
                    *err_msg = CString::new(format!(
                        "Error on converting C char to rust str: {e}"
                    ))
                    .unwrap()
                    .into_raw();
                    *err_kind = CString::new(format!(
                        "{}",
                        nmstate::ErrorKind::InvalidArgument
                    ))
                    .unwrap()
                    .into_raw();
                }
                return NMSTATE_FAIL;
            }
        }
    }

    // TODO: save log to the output pointer
    let result = nmstate::NetworkState::checkpoint_rollback(checkpoint_str);
    unsafe {
        *log = CString::new(logger.drain(now)).unwrap().into_raw();
    }

    if let Err(e) = result {
        unsafe {
            *err_msg = CString::new(e.msg()).unwrap().into_raw();
            *err_kind =
                CString::new(format!("{}", &e.kind())).unwrap().into_raw();
        }
        NMSTATE_FAIL
    } else {
        NMSTATE_PASS
    }
}