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5e97c3fc | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
96c210bb | 23 | #define _GNU_SOURCE |
5e97c3fc | 24 | #include <stdio.h> |
96c210bb | 25 | #undef _GNU_SOURCE |
5e97c3fc | 26 | #include <libgen.h> |
96c210bb | 27 | #include <stdlib.h> |
5e97c3fc | 28 | #include <unistd.h> |
29 | #include <string.h> | |
b0a33c1e | 30 | #include <termios.h> |
31 | #include <errno.h> | |
c36583c3 | 32 | #include <fcntl.h> |
f8e09a0b | 33 | #include <signal.h> |
5e97c3fc | 34 | #include <sys/param.h> |
35 | #include <sys/utsname.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/socket.h> | |
c36583c3 | 38 | #include <sys/stat.h> |
5e97c3fc | 39 | #include <arpa/inet.h> |
40 | #include <netinet/in.h> | |
41 | #include <net/if.h> | |
42 | ||
fae349da DL |
43 | #include "log.h" |
44 | #include "lxc.h" | |
45 | #include "conf.h" | |
46 | #include "utils.h" | |
96c210bb | 47 | #include "config.h" |
fae349da DL |
48 | #include "confile.h" |
49 | #include "arguments.h" | |
36eb9bde | 50 | |
77075659 | 51 | lxc_log_define(lxc_start_ui, lxc_start); |
5e97c3fc | 52 | |
33ba4ad7 CLG |
53 | static struct lxc_list defines; |
54 | ||
c36583c3 DL |
55 | static int my_parser(struct lxc_arguments* args, int c, char* arg) |
56 | { | |
57 | switch (c) { | |
58 | case 'd': args->daemonize = 1; break; | |
48862401 | 59 | case 'f': args->rcfile = arg; break; |
33ba4ad7 | 60 | case 's': return lxc_config_define_add(&defines, arg); |
c36583c3 DL |
61 | } |
62 | return 0; | |
63 | } | |
64 | ||
9618063c | 65 | static const struct option my_longopts[] = { |
c36583c3 | 66 | {"daemon", no_argument, 0, 'd'}, |
48862401 | 67 | {"rcfile", required_argument, 0, 'f'}, |
33ba4ad7 | 68 | {"define", required_argument, 0, 's'}, |
9618063c MN |
69 | LXC_COMMON_OPTIONS |
70 | }; | |
71 | ||
72 | static struct lxc_arguments my_args = { | |
73 | .progname = "lxc-start", | |
74 | .help = "\ | |
75 | --name=NAME -- COMMAND\n\ | |
76 | \n\ | |
77 | lxc-start start COMMAND in specified container NAME\n\ | |
78 | \n\ | |
79 | Options :\n\ | |
c36583c3 | 80 | -n, --name=NAME NAME for name of the container\n\ |
48862401 | 81 | -d, --daemon daemonize the container\n\ |
33ba4ad7 CLG |
82 | -f, --rcfile=FILE Load configuration file FILE\n\ |
83 | -s, --define KEY=VAL Assign VAL to configuration variable KEY\n", | |
c36583c3 DL |
84 | .options = my_longopts, |
85 | .parser = my_parser, | |
86 | .checker = NULL, | |
87 | .daemonize = 0, | |
9618063c | 88 | }; |
5e97c3fc | 89 | |
f8e09a0b DL |
90 | static int save_tty(struct termios *tios) |
91 | { | |
92 | if (!isatty(0)) | |
93 | return 0; | |
94 | ||
95 | if (tcgetattr(0, tios)) | |
96 | WARN("failed to get current terminal settings : %s", | |
97 | strerror(errno)); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static int restore_tty(struct termios *tios) | |
103 | { | |
104 | struct termios current_tios; | |
105 | void (*oldhandler)(int); | |
106 | int ret; | |
107 | ||
108 | if (!isatty(0)) | |
109 | return 0; | |
110 | ||
111 | if (tcgetattr(0, ¤t_tios)) { | |
112 | ERROR("failed to get current terminal settings : %s", | |
113 | strerror(errno)); | |
114 | return -1; | |
115 | } | |
116 | ||
117 | if (!memcmp(tios, ¤t_tios, sizeof(*tios))) | |
118 | return 0; | |
119 | ||
f8e09a0b DL |
120 | oldhandler = signal(SIGTTOU, SIG_IGN); |
121 | ret = tcsetattr(0, TCSADRAIN, tios); | |
122 | if (ret) | |
123 | ERROR("failed to restore terminal attributes"); | |
124 | signal(SIGTTOU, oldhandler); | |
125 | ||
126 | return ret; | |
127 | } | |
128 | ||
5e97c3fc | 129 | int main(int argc, char *argv[]) |
130 | { | |
9618063c | 131 | char *const *args; |
e043236e | 132 | int err = -1; |
b0a33c1e | 133 | struct termios tios; |
134 | ||
9618063c | 135 | char *const default_args[] = { |
b2b6c597 | 136 | "/sbin/init", |
137 | '\0', | |
138 | }; | |
5e97c3fc | 139 | |
96c210bb | 140 | char *rcfile = NULL; |
7b379ab3 | 141 | struct lxc_conf *conf; |
96c210bb | 142 | |
33ba4ad7 CLG |
143 | lxc_list_init(&defines); |
144 | ||
e043236e MN |
145 | if (lxc_arguments_parse(&my_args, argc, argv)) |
146 | return err; | |
5e97c3fc | 147 | |
9618063c | 148 | if (!my_args.argc) |
b2b6c597 | 149 | args = default_args; |
9618063c MN |
150 | else |
151 | args = my_args.argv; | |
5e97c3fc | 152 | |
9618063c MN |
153 | if (lxc_log_init(my_args.log_file, my_args.log_priority, |
154 | my_args.progname, my_args.quiet)) | |
e043236e | 155 | return err; |
51cab631 | 156 | |
96c210bb DL |
157 | /* rcfile is specified in the cli option */ |
158 | if (my_args.rcfile) | |
159 | rcfile = (char *)my_args.rcfile; | |
160 | else { | |
7418c9ce | 161 | if (!asprintf(&rcfile, LXCPATH "/%s/config", my_args.name)) { |
96c210bb DL |
162 | SYSERROR("failed to allocate memory"); |
163 | return err; | |
164 | } | |
165 | ||
166 | /* container configuration does not exist */ | |
167 | if (access(rcfile, F_OK)) { | |
168 | free(rcfile); | |
169 | rcfile = NULL; | |
170 | } | |
171 | } | |
172 | ||
7b379ab3 MN |
173 | conf = lxc_conf_init(); |
174 | if (!conf) { | |
175 | ERROR("failed to initialize configuration"); | |
fae349da DL |
176 | return err; |
177 | } | |
178 | ||
7b379ab3 | 179 | if (rcfile && lxc_config_read(rcfile, conf)) { |
fae349da DL |
180 | ERROR("failed to read configuration file"); |
181 | return err; | |
182 | } | |
183 | ||
33ba4ad7 CLG |
184 | if (lxc_config_define_load(&defines, conf)) |
185 | return err; | |
186 | ||
f2ae79a0 AN |
187 | if (!rcfile && !strcmp("/sbin/init", args[0])) { |
188 | ERROR("no configuration file for '/sbin/init' (may crash the host)"); | |
189 | return err; | |
190 | } | |
191 | ||
b8f57738 DL |
192 | if (my_args.daemonize) { |
193 | ||
194 | /* do not chdir as we want to open the log file, | |
195 | * change the directory right after. | |
196 | * do not close 0, 1, 2, we want to do that | |
197 | * ourself because we don't want /dev/null | |
198 | * being reopened. | |
199 | */ | |
af795875 | 200 | if (daemon(1, 1)) { |
b8f57738 DL |
201 | SYSERROR("failed to daemonize '%s'", my_args.name); |
202 | return err; | |
203 | } | |
204 | ||
af795875 DL |
205 | lxc_close_inherited_fd(0); |
206 | lxc_close_inherited_fd(1); | |
207 | lxc_close_inherited_fd(2); | |
b8f57738 DL |
208 | |
209 | if (my_args.log_file) { | |
210 | open(my_args.log_file, O_WRONLY | O_CLOEXEC); | |
211 | open(my_args.log_file, O_RDONLY | O_CLOEXEC); | |
212 | open(my_args.log_file, O_RDONLY | O_CLOEXEC); | |
213 | } | |
c36583c3 DL |
214 | } |
215 | ||
f8e09a0b | 216 | save_tty(&tios); |
b0a33c1e | 217 | |
7b379ab3 | 218 | err = lxc_start(my_args.name, args, conf); |
5e97c3fc | 219 | |
f8e09a0b | 220 | restore_tty(&tios); |
b0a33c1e | 221 | |
222 | return err; | |
5e97c3fc | 223 | } |
224 |