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migrate to upstream libcompose in one and a half go

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This commit is contained in:
Ivan Mikushin
2015-11-26 17:41:42 +05:00
parent 1d691cd8d6
commit 5a363ab97d
1291 changed files with 40107 additions and 123532 deletions
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24
vendor/github.com/opencontainers/runc/libcontainer/nsenter/nsexec.c generated vendored
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@@ -23,7 +23,7 @@ struct clone_arg {
* Reserve some space for clone() to locate arguments
* and retcode in this place
*/
char stack[4096] __attribute__ ((aligned(8)));
char stack[4096] __attribute__ ((aligned(16)));
char stack_ptr[0];
jmp_buf *env;
};
@@ -65,11 +65,11 @@ static int clone_parent(jmp_buf * env)
void nsexec()
{
char *namespaces[] = { "ipc", "uts", "net", "pid", "mnt" };
char *namespaces[] = { "ipc", "uts", "net", "pid", "mnt", "user" };
const int num = sizeof(namespaces) / sizeof(char *);
jmp_buf env;
char buf[PATH_MAX], *val;
int i, tfd, child, len, pipenum, consolefd = -1;
int i, tfd, self_tfd, child, len, pipenum, consolefd = -1;
pid_t pid;
char *console;
@@ -114,17 +114,30 @@ void nsexec()
exit(1);
}
self_tfd = open("/proc/self/ns", O_DIRECTORY | O_RDONLY);
if (self_tfd == -1) {
pr_perror("Failed to open /proc/self/ns");
exit(1);
}
for (i = 0; i < num; i++) {
struct stat st;
struct stat self_st;
int fd;
/* Symlinks on all namespaces exist for dead processes, but they can't be opened */
if (fstatat(tfd, namespaces[i], &st, AT_SYMLINK_NOFOLLOW) == -1) {
if (fstatat(tfd, namespaces[i], &st, 0) == -1) {
// Ignore nonexistent namespaces.
if (errno == ENOENT)
continue;
}
/* Skip namespaces we're already part of */
if (fstatat(self_tfd, namespaces[i], &self_st, 0) != -1 &&
st.st_ino == self_st.st_ino) {
continue;
}
fd = openat(tfd, namespaces[i], O_RDONLY);
if (fd == -1) {
pr_perror("Failed to open ns file %s for ns %s", buf,
@@ -139,6 +152,9 @@ void nsexec()
close(fd);
}
close(self_tfd);
close(tfd);
if (setjmp(env) == 1) {
// Child