int main(int argc, char *argv[])
{
char const * dir;
int root_fd;
int this_fd;
char * umount_cmd[] = { UMOUNT_PROG, "-l", "-n", ".", 0 };
if (argc<2) {
WRITE_MSG(2, "Try '");
WRITE_STR(2, argv[0]);
WRITE_MSG(2, " --help' for more information.\n");
return EXIT_FAILURE;
}
if (strcmp(argv[1], "--help")==0) showHelp(1, argv[0], 0);
if (strcmp(argv[1], "--version")==0) showVersion();
dir = argv[1];
if (strcmp(dir, "--")==0 && argc>=3) dir = argv[2];
root_fd = Eopen("/", O_RDONLY, 0);
Echroot(".");
Echdir(dir);
this_fd = Eopen(".", O_RDONLY, 0);
Efchdir(root_fd);
Echroot(".");
Efchdir(this_fd);
Eclose(root_fd);
Eclose(this_fd);
Eexecv(umount_cmd[0], umount_cmd);
}
static bool
checkFile(char const *fname)
{
int fd = Eopen(fname, O_RDONLY, 0);
off_t l = Elseek(fd, 0, SEEK_END);
char const * data = 0;
bool res = true;
if (l>100*1024*1024) {
WRITE_MSG(2, "WARNING: '");
WRITE_STR(2, fname);
WRITE_STR(2, "' is too large for a vserver configuration file\n");
res = false;
}
else if (l>0) {
data = mmap(0, l, PROT_READ, MAP_PRIVATE, fd, 0);
if (data==MAP_FAILED) {
perror("mmap()");
exit(wrapper_exit_code);
}
if (data[l-1]!='\n') {
WRITE_MSG(2, "WARNING: '");
WRITE_STR(2, fname);
WRITE_MSG(2, "' does not end on newline\n");
res = false;
}
munmap(const_cast(char *)(data), l);
}
/*@-superuser@*/
int
initializeSystem(int argc, char *argv[],
struct InterfaceInfoList * ifs,
struct ServerInfoList * servers,
struct FdInfoList * fds)
{
struct ConfigInfo cfg;
pid_t pid, pidfile_pid;
int pidfile_fd;
cfg.conffile_name = CFG_FILENAME;
cfg.do_fork = true;
parseCommandline(argc, argv, &cfg);
/*@-boundswrite@*/
getConfig(cfg.conffile_name, &cfg);
initFDs(fds, &cfg);
/*@=boundswrite@*/
pidfile_fd = Eopen(cfg.pidfile_name, O_WRONLY|O_CREAT, 0444);
openMsgfile(cfg.logfile_name);
*ifs = cfg.interfaces;
*servers = cfg.servers;
Eclose(0);
if (cfg.do_fork) pid = fork();
else pid = 0;
pidfile_pid = 0;
switch (pid) {
case 0 :
pidfile_pid = initializeDaemon(&cfg);
break;
case -1 : perror("fork()"); break;
default : pidfile_pid = pid; break;
}
if (pidfile_pid!=0) {
writeUInt(pidfile_fd, pidfile_pid);
(void)write(pidfile_fd, "\n", 1);
}
freeLimitList(&cfg.ulimits);
/* It is too late to handle an error here. So just ignore it... */
(void)close(pidfile_fd);
return pid;
}
int main(int argc, char *argv[])
{
bool quiet = false;
char const * vserver;
VserverTag tag;
while (1) {
int c = getopt_long(argc, argv, "ql", CMDLINE_OPTIONS, 0);
if (c==-1) break;
switch (c) {
case 'h' : showHelp(1, argv[0], 0);
case 'v' : showVersion();
case 'l' : showTags();
case 'q' : quiet = true; break;
default :
WRITE_MSG(2, "Try '");
WRITE_STR(2, argv[0]);
WRITE_MSG(2, " --help' for more information.\n");
exit(1);
break;
}
}
if (optind+2>argc) {
execQuery("-", tgSYSINFO, 0, 0);
WRITE_MSG(2, "\nAssumed 'SYSINFO' as no other option given; try '--help' for more information.\n");
exit(0);
}
vserver = argv[optind];
tag = stringToTag(argv[optind+1]);
if (tag==tgNONE) {
WRITE_MSG(2, "Unknown tag; use '-l' to get list of valid tags\n");
exit(1);
}
if (quiet) {
int fd = Eopen("/dev/null", O_WRONLY, 0644);
Edup2(fd, 1);
Eclose(fd);
}
return execQuery(vserver, tag, argc-(optind+2), argv+optind+2);
}
void
openMsgfile(/*@in@*//*@null@*/char const *filename)
/*@globals msg_fd@*/
/*@modifies msg_fd@*/
{
if (filename==0 || filename[0]=='\0') { msg_fd = 2; }
else if (strcmp(filename, "/dev/null")==0) { msg_fd = -1; }
else {
int new_fd;
new_fd = Eopen(filename, O_CREAT|O_WRONLY|O_APPEND, 0400);
msg_fd = Edup2(new_fd, 2);
assert(msg_fd==2);
Eclose(new_fd);
}
}
void suppl_log_log_header(void)
{ char *fnam;
nlstime t;
assert(suppl_Stack);
if(!suppl_log_lock())
return;
/* Open the logfile if not done so already */
if(!suppl_l_logfile) {
/* If to lock the debug package fails, _item() and _trailer()
will silently ignore any calls */
chkHeap
if((fnam = appNameEx()) == 0)
Esuppl_noMem();
fnam = EStrConcat(2, fnam, DBG_EXTENSION);
suppl_l_logfile = Eopen(fnam, suppl_l_openmode);
chkHeap
free(fnam);
}
void openlog(const char * const ident, int option, int facility)
{ static FLAG8 recursive = 0; /* to prevent recursive calls
to openlog() when using
syslogo() */
DBG_ENTER("openlog", Suppl_syslog)
/* "++semaphore" is considered an atomic operation by
many programs; it's native C's best approximation
for the P(semaphore) operation */
if(++recursive == 1 /* not recursively called */
&& ++syslog_opencount == 1) { /* not opened til now */
/* When these statements are executed, no logfile has
been opened so far. That means that they can be logged
onto STDERR only. */
chkHeap
syslog_options = option;
syslog_facility = facility;
syslog_ident = Estrdup(ident);
if((syslog_fnam = appNameEx()) == 0)
Esuppl_noMem();
syslog_fnam = SYSLOG_FNAM(syslog_fnam);
syslog_logfile = Eopen(syslog_fnam, syslog_openmode);
chkHeap
}
static void
initMtab(struct Configuration const *cfg)
{
ENSC_PI_DECLARE(mtab_subpath, "apps/init/mtab");
PathInfo mtab_path = cfg->cfgdir;
char mtab_buf[ENSC_PI_APPSZ(mtab_path, mtab_subpath)];
PathInfo_append(&mtab_path, &mtab_subpath, mtab_buf);
char const * mtab = findMtab(mtab_path.d);
pid_t pid;
int p[2];
Epipe(p);
pid = Efork();
if (pid==0) {
Undo_detach();
Eclose(p[1]);
Echdir(cfg->vdir);
Echroot(".");
int fd = Eopen("/etc/mtab", O_WRONLY|O_CREAT, 0644);
for (;;) {
char buf[4096];
ssize_t len = TEMP_FAILURE_RETRY(read(p[0], buf, sizeof buf));
if (len==0) break;
if (len==-1) {
perror("vserver-start: initMtab/read():");
_exit(1);
}
Ewrite(fd, buf, len);
}
Eclose(fd);
Eclose(p[0]);
_exit(0);
}
else {
Eclose(p[0]);
if (mtab!=0) {
int fd = Eopen(mtab, O_RDONLY, 0644);
for (;;) {
char buf[4096];
ssize_t len = TEMP_FAILURE_RETRY(read(fd, buf, sizeof buf));
if (len==0) break;
if (len==-1) {
perror("vserver-start: initMtab/read():");
_exit(1);
}
Ewrite(p[1], buf, len);
}
Eclose(fd);
}
Eclose(p[1]);
int status;
TEMP_FAILURE_RETRY(wait4(pid, &status, 0,0));
if (!WIFEXITED(status) || WEXITSTATUS(status)!=0) {
exit(1);
}
}
}
