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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "spawn_popen.h"
struct popen_instance {
SPAWN_INSTANCE *si;
FILE *child_stdin_fp;
FILE *child_stdout_fp;
};
SPAWN_SERVER *netdata_main_spawn_server = NULL;
static SPINLOCK netdata_main_spawn_server_spinlock = NETDATA_SPINLOCK_INITIALIZER;
bool netdata_main_spawn_server_init(const char *name, int argc, const char **argv) {
if(netdata_main_spawn_server == NULL) {
spinlock_lock(&netdata_main_spawn_server_spinlock);
if(netdata_main_spawn_server == NULL)
netdata_main_spawn_server = spawn_server_create(SPAWN_SERVER_OPTION_EXEC, name, NULL, argc, argv);
spinlock_unlock(&netdata_main_spawn_server_spinlock);
}
return netdata_main_spawn_server != NULL;
}
void netdata_main_spawn_server_cleanup(void) {
if(netdata_main_spawn_server) {
spinlock_lock(&netdata_main_spawn_server_spinlock);
if(netdata_main_spawn_server) {
spawn_server_destroy(netdata_main_spawn_server);
netdata_main_spawn_server = NULL;
}
spinlock_unlock(&netdata_main_spawn_server_spinlock);
}
}
FILE *spawn_popen_stdin(POPEN_INSTANCE *pi) {
if(!pi->child_stdin_fp)
pi->child_stdin_fp = fdopen(spawn_server_instance_write_fd(pi->si), "w");
if(!pi->child_stdin_fp)
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot open FILE on child's stdin on fd %d.",
spawn_server_instance_write_fd(pi->si));
return pi->child_stdin_fp;
}
FILE *spawn_popen_stdout(POPEN_INSTANCE *pi) {
if(!pi->child_stdout_fp)
pi->child_stdout_fp = fdopen(spawn_server_instance_read_fd(pi->si), "r");
if(!pi->child_stdout_fp)
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot open FILE on child's stdout on fd %d.",
spawn_server_instance_read_fd(pi->si));
return pi->child_stdout_fp;
}
POPEN_INSTANCE *spawn_popen_run_argv(const char **argv) {
netdata_main_spawn_server_init(NULL, 0, NULL);
SPAWN_INSTANCE *si = spawn_server_exec(netdata_main_spawn_server, nd_log_collectors_fd(),
0, argv, NULL, 0, SPAWN_INSTANCE_TYPE_EXEC);
if(si == NULL) return NULL;
POPEN_INSTANCE *pi = callocz(1, sizeof(*pi));
pi->si = si;
return pi;
}
POPEN_INSTANCE *spawn_popen_run_variadic(const char *cmd, ...) {
va_list args;
va_list args_copy;
int argc = 0;
// Start processing variadic arguments
va_start(args, cmd);
// Make a copy of args to count the number of arguments
va_copy(args_copy, args);
while (va_arg(args_copy, char *) != NULL) argc++;
va_end(args_copy);
// Allocate memory for argv array (+2 for cmd and NULL terminator)
const char *argv[argc + 2];
// Populate the argv array
argv[0] = cmd;
for (int i = 1; i <= argc; i++)
argv[i] = va_arg(args, const char *);
argv[argc + 1] = NULL; // NULL-terminate the array
// End processing variadic arguments
va_end(args);
return spawn_popen_run_argv(argv);
}
POPEN_INSTANCE *spawn_popen_run(const char *cmd) {
if(!cmd || !*cmd) return NULL;
//#if defined(OS_WINDOWS)
// if(strncmp(cmd, "exec ", 5) == 0) {
// size_t len = strlen(cmd);
// char cmd_copy[strlen(cmd) + 1];
// memcpy(cmd_copy, cmd, len + 1);
// char *words[100];
// size_t num_words = quoted_strings_splitter(cmd_copy, words, 100, isspace_map_pluginsd);
// char *exec = get_word(words, num_words, 0);
// char *prog = get_word(words, num_words, 1);
// if (strcmp(exec, "exec") == 0 &&
// prog &&
// strendswith(prog, ".plugin") &&
// !strendswith(prog, "charts.d.plugin") &&
// !strendswith(prog, "ioping.plugin")) {
// const char *argv[num_words - 1 + 1]; // remove exec, add terminator
//
// size_t dst = 0;
// for (size_t i = 1; i < num_words; i++)
// argv[dst++] = get_word(words, num_words, i);
//
// argv[dst] = NULL;
// return spawn_popen_run_argv(argv);
// }
// }
//#endif
const char *argv[] = {
"/bin/sh",
"-c",
cmd,
NULL
};
return spawn_popen_run_argv(argv);
}
static int spawn_popen_status_rc(int status) {
if(WIFEXITED(status))
return WEXITSTATUS(status);
if(WIFSIGNALED(status)) {
int sig = WTERMSIG(status);
switch(sig) {
case SIGTERM:
case SIGPIPE:
return 0;
default:
return -1;
}
}
return -1;
}
static void spawn_popen_close_files(POPEN_INSTANCE *pi) {
if(pi->child_stdin_fp) {
fclose(pi->child_stdin_fp);
pi->child_stdin_fp = NULL;
spawn_server_instance_write_fd_unset(pi->si);
}
if(pi->child_stdout_fp) {
fclose(pi->child_stdout_fp);
pi->child_stdout_fp = NULL;
spawn_server_instance_read_fd_unset(pi->si);
}
}
int spawn_popen_wait(POPEN_INSTANCE *pi) {
if(!pi) return -1;
spawn_popen_close_files(pi);
int status = spawn_server_exec_wait(netdata_main_spawn_server, pi->si);
freez(pi);
return spawn_popen_status_rc(status);
}
int spawn_popen_kill(POPEN_INSTANCE *pi) {
if(!pi) return -1;
spawn_popen_close_files(pi);
int status = spawn_server_exec_kill(netdata_main_spawn_server, pi->si);
freez(pi);
return spawn_popen_status_rc(status);
}
pid_t spawn_popen_pid(POPEN_INSTANCE *pi) {
if(!pi) return -1;
return spawn_server_instance_pid(pi->si);
}
int spawn_popen_read_fd(POPEN_INSTANCE *pi) {
if(!pi) return -1;
return spawn_server_instance_read_fd(pi->si);
}
int spawn_popen_write_fd(POPEN_INSTANCE *pi) {
if(!pi) return -1;
return spawn_server_instance_write_fd(pi->si);
}
|
