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Commit | Line | Data |
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0ae4f887 GK |
1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ae4f887 GK |
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 | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ae4f887 GK |
22 | */ |
23 | ||
cd90db2c | 24 | #define _GNU_SOURCE |
a0a2066d SH |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> | |
0ae4f887 GK |
27 | #include <errno.h> |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
cd90db2c | 30 | #include <stdio.h> |
0ae4f887 | 31 | |
e0b0b533 | 32 | #include "conf.h" |
0ae4f887 GK |
33 | #include "log.h" |
34 | #include "start.h" | |
8afb3e61 | 35 | #include "utils.h" |
0ae4f887 GK |
36 | |
37 | lxc_log_define(lxc_execute, lxc_start); | |
38 | ||
0ae4f887 GK |
39 | static int execute_start(struct lxc_handler *handler, void* data) |
40 | { | |
321614a5 CB |
41 | int argc_add, j; |
42 | char **argv; | |
43 | int argc = 0, i = 0, logfd = -1; | |
0ae4f887 | 44 | struct execute_args *my_args = data; |
321614a5 | 45 | char logfile[LXC_PROC_PID_FD_LEN]; |
0ae4f887 GK |
46 | |
47 | while (my_args->argv[argc++]); | |
48 | ||
858faf70 SH |
49 | /* lxc-init -n name -- [argc] NULL -> 5 */ |
50 | argc_add = 5; | |
e0b0b533 DE |
51 | if (my_args->quiet) |
52 | argc_add++; | |
321614a5 | 53 | |
858faf70 SH |
54 | if (!handler->conf->rootfs.path) |
55 | argc_add += 2; | |
321614a5 | 56 | |
858faf70 SH |
57 | if (lxc_log_has_valid_level()) |
58 | argc_add += 2; | |
e0b0b533 | 59 | |
9c40b2d9 TA |
60 | if (current_config->logfd != -1 || lxc_log_fd != -1) |
61 | argc_add += 2; | |
62 | ||
e0b0b533 | 63 | argv = malloc((argc + argc_add) * sizeof(*argv)); |
b2efeb0b TA |
64 | if (!argv) { |
65 | SYSERROR("Allocating init args failed"); | |
e0b0b533 | 66 | goto out1; |
b2efeb0b | 67 | } |
0ae4f887 | 68 | |
b2efeb0b TA |
69 | if (!my_args->init_path) { |
70 | ERROR("Init path missing"); | |
e0b0b533 | 71 | goto out2; |
b2efeb0b | 72 | } |
794248d0 CB |
73 | |
74 | argv[i++] = my_args->init_path; | |
a6f151a7 CB |
75 | |
76 | argv[i++] = "-n"; | |
77 | argv[i++] = (char *)handler->name; | |
78 | ||
79 | if (lxc_log_has_valid_level()) { | |
80 | argv[i++] = "-l"; | |
81 | argv[i++] = (char *)lxc_log_priority_to_string(lxc_log_get_level()); | |
82 | } | |
83 | ||
cd90db2c | 84 | if (current_config->logfd != -1 || lxc_log_fd != -1) { |
321614a5 | 85 | int ret; |
cd90db2c TA |
86 | int to_dup = current_config->logfd; |
87 | ||
88 | if (current_config->logfd == -1) | |
89 | to_dup = lxc_log_fd; | |
90 | ||
321614a5 CB |
91 | logfd = dup(to_dup); |
92 | if (logfd < 0) { | |
93 | SYSERROR("Failed to duplicate log file descriptor"); | |
cd90db2c TA |
94 | goto out2; |
95 | } | |
96 | ||
321614a5 CB |
97 | ret = snprintf(logfile, sizeof(logfile), "/proc/1/fd/%d", logfd); |
98 | if (ret < 0 || (size_t)ret >= sizeof(logfile)) | |
cd90db2c | 99 | goto out3; |
cd90db2c | 100 | |
8f98ac7b | 101 | argv[i++] = "-o"; |
321614a5 | 102 | argv[i++] = logfile; |
8f98ac7b CB |
103 | } |
104 | ||
0ae4f887 GK |
105 | if (my_args->quiet) |
106 | argv[i++] = "--quiet"; | |
a6f151a7 | 107 | |
e0b0b533 | 108 | if (!handler->conf->rootfs.path) { |
a6f151a7 | 109 | argv[i++] = "-P"; |
e0b0b533 | 110 | argv[i++] = (char *)handler->lxcpath; |
e0b0b533 | 111 | } |
a6f151a7 | 112 | |
0ae4f887 GK |
113 | argv[i++] = "--"; |
114 | for (j = 0; j < argc; j++) | |
115 | argv[i++] = my_args->argv[j]; | |
116 | argv[i++] = NULL; | |
117 | ||
a6f151a7 | 118 | NOTICE("Exec'ing \"%s\"", my_args->argv[0]); |
0ae4f887 GK |
119 | |
120 | execvp(argv[0], argv); | |
a6f151a7 | 121 | SYSERROR("Failed to exec %s", argv[0]); |
794248d0 | 122 | |
cd90db2c | 123 | out3: |
321614a5 | 124 | close(logfd); |
e0b0b533 DE |
125 | out2: |
126 | free(argv); | |
127 | out1: | |
0ae4f887 GK |
128 | return 1; |
129 | } | |
130 | ||
131 | static int execute_post_start(struct lxc_handler *handler, void* data) | |
132 | { | |
133 | struct execute_args *my_args = data; | |
134 | NOTICE("'%s' started with pid '%d'", my_args->argv[0], handler->pid); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static struct lxc_operations execute_start_ops = { | |
139 | .start = execute_start, | |
140 | .post_start = execute_post_start | |
141 | }; | |
142 | ||
143 | int lxc_execute(const char *name, char *const argv[], int quiet, | |
aa460476 | 144 | struct lxc_handler *handler, const char *lxcpath, |
a3b4f3d6 | 145 | bool backgrounded, int *error_num) |
0ae4f887 | 146 | { |
aa460476 | 147 | struct execute_args args = {.argv = argv, .quiet = quiet}; |
0ae4f887 | 148 | |
b2efeb0b | 149 | TRACE("Doing lxc_execute"); |
aa460476 CB |
150 | handler->conf->is_execute = 1; |
151 | return __lxc_start(name, handler, &execute_start_ops, &args, lxcpath, | |
a3b4f3d6 | 152 | backgrounded, error_num); |
0ae4f887 | 153 | } |