void Block(char *exit_label)
{
while ( (Look != 'e') && (Look !='l') && (Look !='u') ) {
Fin();
printf("# BLOCK start\n");
switch (Look) {
case 'i':
DoIf(exit_label);
break;
case 'w':
DoWhile();
break;
case 'p':
DoLoop();
break;
case 'r':
DoRepeat();
break;
case 'f':
DoFor();
break;
case 'd':
DoDo();
break;
case 'b':
DoBreak(exit_label);
break;
default:
Assignment();
break;
}
Fin();
printf("# BLOCK end\n");
}
}
void Block(char *L)
{
while (! strchr("elu", Look)) {
dprint("Block: get Look = %c\n", Look);
switch (Look) {
case 'i':
DoIf(L);
break;
case 'w':
DoWhile();
break;
case 'p':
DoLoop();
break;
case 'r':
DoRepeat();
break;
case 'f':
DoFor();
break;
case 'd':
DoDo();
break;
case 'b':
DoBreak(L);
default:
Assignment();
break;
}
/* this is for convinent, otherwise newline character will
cause an error */
/*Newline();*/
Fin();
}
}
void GDoInit( TYPE do_type ) {
//==============================
// Initialize a DO or implied-DO.
// Process "DO I=e1,e2,e3", where e1, e2 and e3 are numeric expressions.
if( StmtSw & SS_DATA_INIT ) {
DataDo( do_type );
} else {
DoLoop( do_type );
}
}
void Block() {
while(Look != 'e' && Look !='l' && Look != 'u') {
Fin();
switch(Look) {
case 'i': DoIf(); break;
case 'w': DoWhile(); break;
case 'p': DoLoop(); break;
case 'r': DoRepeat(); break;
case 'f': DoFor(); break;
default : Assignment(); break;
}
}
}
int
main(int argc, char **argv)
{
char *name;
const char *lastlabel;
int arg, f, holdfd[3], label;
struct bundle *bundle;
struct prompt *prompt;
struct switches sw;
probe_Init();
/*
* We open 3 descriptors to ensure that STDIN_FILENO, STDOUT_FILENO and
* STDERR_FILENO are always open. These are closed before DoLoop(),
* but *after* we've avoided the possibility of erroneously closing
* an important descriptor with close(STD{IN,OUT,ERR}_FILENO).
*/
if ((holdfd[0] = open(_PATH_DEVNULL, O_RDWR)) == -1) {
fprintf(stderr, "Cannot open %s !\n", _PATH_DEVNULL);
return 2;
}
for (f = 1; f < sizeof holdfd / sizeof *holdfd; f++)
holdfd[f] = dup(holdfd[0]);
name = strrchr(argv[0], '/');
log_Open(name ? name + 1 : argv[0]);
#ifndef NONAT
PacketAliasInit();
#endif
label = ProcessArgs(argc, argv, &sw);
/*
* A FreeBSD & OpenBSD hack to dodge a bug in the tty driver that drops
* output occasionally.... I must find the real reason some time. To
* display the dodgy behaviour, comment out this bit, make yourself a large
* routing table and then run ppp in interactive mode. The `show route'
* command will drop chunks of data !!!
*/
if (sw.mode == PHYS_INTERACTIVE) {
close(STDIN_FILENO);
if (open(_PATH_TTY, O_RDONLY) != STDIN_FILENO) {
fprintf(stderr, "Cannot open %s for input !\n", _PATH_TTY);
return 2;
}
}
/* Allow output for the moment (except in direct mode) */
if (sw.mode == PHYS_DIRECT)
prompt = NULL;
else
SignalPrompt = prompt = prompt_Create(NULL, NULL, PROMPT_STD);
ID0init();
if (ID0realuid() != 0) {
char conf[200], *ptr;
snprintf(conf, sizeof conf, "%s/%s", PPP_CONFDIR, CONFFILE);
do {
struct stat sb;
if (stat(conf, &sb) == 0 && sb.st_mode & S_IWOTH) {
log_Printf(LogALERT, "ppp: Access violation: Please protect %s\n",
conf);
return -1;
}
ptr = conf + strlen(conf)-2;
while (ptr > conf && *ptr != '/')
*ptr-- = '\0';
} while (ptr >= conf);
}
if (label < argc)
for (arg = label; arg < argc; arg++)
CheckLabel(argv[arg], prompt, sw.mode);
else
CheckLabel("default", prompt, sw.mode);
if (!sw.quiet)
prompt_Printf(prompt, "Working in %s mode\n", mode2Nam(sw.mode));
if ((bundle = bundle_Create(TUN_PREFIX, sw.mode, sw.unit)) == NULL)
return EX_START;
/* NOTE: We may now have changed argv[1] via a ``set proctitle'' */
if (prompt) {
prompt->bundle = bundle; /* couldn't do it earlier */
if (!sw.quiet)
prompt_Printf(prompt, "Using interface: %s\n", bundle->iface->name);
}
SignalBundle = bundle;
bundle->NatEnabled = sw.nat;
if (sw.nat)
opt_enable(bundle, OPT_IFACEALIAS);
if (system_Select(bundle, "default", CONFFILE, prompt, NULL) < 0)
prompt_Printf(prompt, "Warning: No default entry found in config file.\n");
sig_signal(SIGHUP, CloseSession);
sig_signal(SIGTERM, CloseSession);
sig_signal(SIGINT, CloseConnection);
sig_signal(SIGQUIT, CloseSession);
sig_signal(SIGALRM, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
if (sw.mode == PHYS_INTERACTIVE)
sig_signal(SIGTSTP, TerminalStop);
sig_signal(SIGUSR1, RestartServer);
sig_signal(SIGUSR2, BringDownServer);
lastlabel = argv[argc - 1];
for (arg = label; arg < argc; arg++) {
/* In case we use LABEL or ``set enddisc label'' */
bundle_SetLabel(bundle, lastlabel);
system_Select(bundle, argv[arg], CONFFILE, prompt, NULL);
}
if (label < argc)
/* In case the last label did a ``load'' */
bundle_SetLabel(bundle, lastlabel);
if (sw.mode == PHYS_AUTO &&
ncprange_family(&bundle->ncp.ipcp.cfg.peer_range) == AF_UNSPEC) {
prompt_Printf(prompt, "You must ``set ifaddr'' with a peer address "
"in auto mode.\n");
AbortProgram(EX_START);
}
if (sw.mode != PHYS_INTERACTIVE) {
if (sw.mode != PHYS_DIRECT) {
if (!sw.fg) {
int bgpipe[2];
pid_t bgpid;
if (sw.mode == PHYS_BACKGROUND && pipe(bgpipe)) {
log_Printf(LogERROR, "pipe: %s\n", strerror(errno));
AbortProgram(EX_SOCK);
}
bgpid = fork();
if (bgpid == -1) {
log_Printf(LogERROR, "fork: %s\n", strerror(errno));
AbortProgram(EX_SOCK);
}
if (bgpid) {
char c = EX_NORMAL;
int ret;
if (sw.mode == PHYS_BACKGROUND) {
close(bgpipe[1]);
BGPid = bgpid;
/* If we get a signal, kill the child */
signal(SIGHUP, KillChild);
signal(SIGTERM, KillChild);
signal(SIGINT, KillChild);
signal(SIGQUIT, KillChild);
/* Wait for our child to close its pipe before we exit */
while ((ret = read(bgpipe[0], &c, 1)) == 1) {
switch (c) {
case EX_NORMAL:
if (!sw.quiet) {
prompt_Printf(prompt, "PPP enabled\n");
log_Printf(LogPHASE, "Parent: PPP enabled\n");
}
break;
case EX_REDIAL:
if (!sw.quiet)
prompt_Printf(prompt, "Attempting redial\n");
continue;
case EX_RECONNECT:
if (!sw.quiet)
prompt_Printf(prompt, "Attempting reconnect\n");
continue;
default:
prompt_Printf(prompt, "Child failed (%s)\n",
ex_desc((int)c));
log_Printf(LogPHASE, "Parent: Child failed (%s)\n",
ex_desc((int) c));
}
break;
}
if (ret != 1) {
prompt_Printf(prompt, "Child exit, no status.\n");
log_Printf(LogPHASE, "Parent: Child exit, no status.\n");
}
close(bgpipe[0]);
}
return c;
} else if (sw.mode == PHYS_BACKGROUND) {
close(bgpipe[0]);
bundle->notify.fd = bgpipe[1];
}
bundle_ChangedPID(bundle);
bundle_LockTun(bundle); /* we have a new pid */
}
/* -auto, -dedicated, -ddial, -foreground & -background */
prompt_Destroy(prompt, 0);
close(STDOUT_FILENO);
close(STDERR_FILENO);
close(STDIN_FILENO);
if (!sw.fg)
setsid();
} else {
/* -direct - STDIN_FILENO gets used by physical_Open */
prompt_TtyInit(NULL);
close(STDOUT_FILENO);
close(STDERR_FILENO);
}
} else {
/* -interactive */
close(STDERR_FILENO);
prompt_TtyInit(prompt);
prompt_TtyCommandMode(prompt);
prompt_Required(prompt);
}
/* We can get rid of these now */
for (f = 0; f < sizeof holdfd / sizeof *holdfd; f++)
close(holdfd[f]);
log_Printf(LogPHASE, "PPP Started (%s mode).\n", mode2Nam(sw.mode));
DoLoop(bundle);
AbortProgram(EX_NORMAL);
return EX_NORMAL;
}
