Eterm
os_getenv_1(Process* p, Eterm key)
{
Eterm str;
int len, res;
char *key_str, *val;
char buf[1024];
size_t val_size = sizeof(buf);
len = is_string(key);
if (!len) {
BIF_ERROR(p, BADARG);
}
/* Leave at least one byte in buf for value */
key_str = len < sizeof(buf)-2 ? &buf[0] : erts_alloc(ERTS_ALC_T_TMP, len+1);
if (intlist_to_buf(key, key_str, len) != len)
erl_exit(1, "%s:%d: Internal error\n", __FILE__, __LINE__);
key_str[len] = '\0';
if (key_str != &buf[0])
val = &buf[0];
else {
val_size -= len + 1;
val = &buf[len + 1];
}
res = erts_sys_getenv(key_str, val, &val_size);
if (res < 0) {
no_var:
str = am_false;
} else {
Eterm* hp;
if (res > 0) {
val = erts_alloc(ERTS_ALC_T_TMP, val_size);
while (1) {
res = erts_sys_getenv(key_str, val, &val_size);
if (res == 0)
break;
else if (res < 0)
goto no_var;
else
val = erts_realloc(ERTS_ALC_T_TMP, val, val_size);
}
}
if (val_size)
hp = HAlloc(p, val_size*2);
str = buf_to_intlist(&hp, val, val_size, NIL);
}
if (key_str != &buf[0])
erts_free(ERTS_ALC_T_TMP, key_str);
if (val < &buf[0] || &buf[sizeof(buf)-1] < val)
erts_free(ERTS_ALC_T_TMP, val);
BIF_RET(str);
}
BIF_RETTYPE os_getenv_1(BIF_ALIST_1)
{
Process* p = BIF_P;
Eterm str;
Sint len;
int res;
char *key_str, *val;
char buf[STATIC_BUF_SIZE];
size_t val_size = sizeof(buf);
key_str = erts_convert_filename_to_native(BIF_ARG_1,buf,STATIC_BUF_SIZE,
ERTS_ALC_T_TMP,1,0,&len);
if (!key_str) {
BIF_ERROR(p, BADARG);
}
if (key_str != &buf[0])
val = &buf[0];
else {
/* len includes zero byte */
val_size -= len;
val = &buf[len];
}
res = erts_sys_getenv(key_str, val, &val_size);
if (res < 0) {
no_var:
str = am_false;
} else {
if (res > 0) {
val = erts_alloc(ERTS_ALC_T_TMP, val_size);
while (1) {
res = erts_sys_getenv(key_str, val, &val_size);
if (res == 0)
break;
else if (res < 0)
goto no_var;
else
val = erts_realloc(ERTS_ALC_T_TMP, val, val_size);
}
}
str = erts_convert_native_to_filename(p,(byte *)val);
}
if (key_str != &buf[0])
erts_free(ERTS_ALC_T_TMP, key_str);
if (val < &buf[0] || &buf[sizeof(buf)-1] < val)
erts_free(ERTS_ALC_T_TMP, val);
BIF_RET(str);
}
void
erl_start(int argc, char **argv)
{
int i = 1;
char* arg=NULL;
char* Parg = NULL;
int have_break_handler = 1;
char envbuf[21]; /* enough for any 64-bit integer */
size_t envbufsz;
int ncpu = early_init(&argc, argv);
envbufsz = sizeof(envbuf);
if (erts_sys_getenv(ERL_MAX_ETS_TABLES_ENV, envbuf, &envbufsz) == 0)
user_requested_db_max_tabs = atoi(envbuf);
else
user_requested_db_max_tabs = 0;
envbufsz = sizeof(envbuf);
if (erts_sys_getenv("ERL_FULLSWEEP_AFTER", envbuf, &envbufsz) == 0) {
Uint16 max_gen_gcs = atoi(envbuf);
erts_smp_atomic32_set_nob(&erts_max_gen_gcs,
(erts_aint32_t) max_gen_gcs);
}
#if (defined(__APPLE__) && defined(__MACH__)) || defined(__DARWIN__)
/*
* The default stack size on MacOS X is too small for pcre.
*/
erts_sched_thread_suggested_stack_size = 256;
#endif
#ifdef DEBUG
verbose = DEBUG_DEFAULT;
#endif
erts_error_logger_warnings = am_error;
while (i < argc) {
if (argv[i][0] != '-') {
erts_usage();
}
if (strcmp(argv[i], "--") == 0) { /* end of emulator options */
i++;
break;
}
switch (argv[i][1]) {
/*
* NOTE: -M flags are handled (and removed from argv) by
* erts_alloc_init().
*
* The -d, -m, -S, -t, and -T flags was removed in
* Erlang 5.3/OTP R9C.
*
* -S, and -T has been reused in Erlang 5.5/OTP R11B.
*
* -d has been reused in a patch R12B-4.
*/
case '#' :
arg = get_arg(argv[i]+2, argv[i+1], &i);
if ((display_items = atoi(arg)) == 0) {
erts_fprintf(stderr, "bad display items%s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("using display items %d\n",display_items));
break;
case 'f':
if (!strncmp(argv[i],"-fn",3)) {
arg = get_arg(argv[i]+3, argv[i+1], &i);
switch (*arg) {
case 'u':
erts_set_user_requested_filename_encoding(ERL_FILENAME_UTF8);
break;
case 'l':
erts_set_user_requested_filename_encoding(ERL_FILENAME_LATIN1);
break;
case 'a':
erts_set_user_requested_filename_encoding(ERL_FILENAME_UNKNOWN);
default:
erts_fprintf(stderr, "bad filename encoding %s, can be (l,u or a)\n", arg);
erts_usage();
}
break;
} else {
erts_fprintf(stderr, "%s unknown flag %s\n", argv[0], argv[i]);
erts_usage();
}
case 'L':
erts_no_line_info = 1;
break;
case 'v':
#ifdef DEBUG
if (argv[i][2] == '\0') {
verbose |= DEBUG_SYSTEM;
} else {
char *ch;
for (ch = argv[i]+2; *ch != '\0'; ch++) {
switch (*ch) {
case 's': verbose |= DEBUG_SYSTEM; break;
case 'g': verbose |= DEBUG_PRIVATE_GC; break;
case 'M': verbose |= DEBUG_MEMORY; break;
case 'a': verbose |= DEBUG_ALLOCATION; break;
case 't': verbose |= DEBUG_THREADS; break;
case 'p': verbose |= DEBUG_PROCESSES; break;
case 'm': verbose |= DEBUG_MESSAGES; break;
default : erts_fprintf(stderr,"Unknown verbose option: %c\n",*ch);
}
}
}
erts_printf("Verbose level: ");
if (verbose & DEBUG_SYSTEM) erts_printf("SYSTEM ");
if (verbose & DEBUG_PRIVATE_GC) erts_printf("PRIVATE_GC ");
if (verbose & DEBUG_MEMORY) erts_printf("PARANOID_MEMORY ");
if (verbose & DEBUG_ALLOCATION) erts_printf("ALLOCATION ");
if (verbose & DEBUG_THREADS) erts_printf("THREADS ");
if (verbose & DEBUG_PROCESSES) erts_printf("PROCESSES ");
if (verbose & DEBUG_MESSAGES) erts_printf("MESSAGES ");
erts_printf("\n");
#else
erts_fprintf(stderr, "warning: -v (only in debug compiled code)\n");
#endif
break;
case 'V' :
{
char tmp[256];
tmp[0] = tmp[1] = '\0';
#ifdef DEBUG
strcat(tmp, ",DEBUG");
#endif
#ifdef ERTS_SMP
strcat(tmp, ",SMP");
#endif
#ifdef USE_THREADS
strcat(tmp, ",ASYNC_THREADS");
#endif
#ifdef HIPE
strcat(tmp, ",HIPE");
#endif
erts_fprintf(stderr, "Erlang ");
if (tmp[1]) {
erts_fprintf(stderr, "(%s) ", tmp+1);
}
erts_fprintf(stderr, "(" EMULATOR ") emulator version "
ERLANG_VERSION "\n");
erl_exit(0, "");
}
break;
case 'H': /* undocumented */
fprintf(stderr, "The undocumented +H option has been removed (R10B-6).\n\n");
break;
case 'h': {
char *sub_param = argv[i]+2;
/* set default heap size
*
* h|ms - min_heap_size
* h|mbs - min_bin_vheap_size
*
*/
if (has_prefix("mbs", sub_param)) {
arg = get_arg(sub_param+3, argv[i+1], &i);
if ((BIN_VH_MIN_SIZE = atoi(arg)) <= 0) {
erts_fprintf(stderr, "bad heap size %s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM, ("using minimum binary virtual heap size %d\n", BIN_VH_MIN_SIZE));
} else if (has_prefix("ms", sub_param)) {
arg = get_arg(sub_param+2, argv[i+1], &i);
if ((H_MIN_SIZE = atoi(arg)) <= 0) {
erts_fprintf(stderr, "bad heap size %s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM, ("using minimum heap size %d\n", H_MIN_SIZE));
} else {
/* backward compatibility */
arg = get_arg(argv[i]+2, argv[i+1], &i);
if ((H_MIN_SIZE = atoi(arg)) <= 0) {
erts_fprintf(stderr, "bad heap size %s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM, ("using minimum heap size %d\n", H_MIN_SIZE));
}
break;
}
case 'd':
/*
* Never produce crash dumps for internally detected
* errors; only produce a core dump. (Generation of
* crash dumps is destructive and makes it impossible
* to inspect the contents of process heaps in the
* core dump.)
*/
erts_no_crash_dump = 1;
break;
case 'e':
if (sys_strcmp("c", argv[i]+2) == 0) {
erts_ets_always_compress = 1;
}
else {
/* set maximum number of ets tables */
arg = get_arg(argv[i]+2, argv[i+1], &i);
if (( user_requested_db_max_tabs = atoi(arg) ) < 0) {
erts_fprintf(stderr, "bad maximum number of ets tables %s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("using maximum number of ets tables %d\n",
user_requested_db_max_tabs));
}
break;
case 'i':
/* define name of module for initial function */
init = get_arg(argv[i]+2, argv[i+1], &i);
break;
case 'b':
/* define name of initial function */
boot = get_arg(argv[i]+2, argv[i+1], &i);
break;
case 'B':
if (argv[i][2] == 'i') /* +Bi */
ignore_break = 1;
else if (argv[i][2] == 'c') /* +Bc */
replace_intr = 1;
else if (argv[i][2] == 'd') /* +Bd */
have_break_handler = 0;
else if (argv[i+1][0] == 'i') { /* +B i */
get_arg(argv[i]+2, argv[i+1], &i);
ignore_break = 1;
}
else if (argv[i+1][0] == 'c') { /* +B c */
get_arg(argv[i]+2, argv[i+1], &i);
replace_intr = 1;
}
else if (argv[i+1][0] == 'd') { /* +B d */
get_arg(argv[i]+2, argv[i+1], &i);
have_break_handler = 0;
}
else /* +B */
have_break_handler = 0;
break;
case 'K':
/* If kernel poll support is present,
erl_sys_args() will remove the K parameter
and value */
get_arg(argv[i]+2, argv[i+1], &i);
erts_fprintf(stderr,
"kernel-poll not supported; \"K\" parameter ignored\n",
arg);
break;
case 'P':
/* set maximum number of processes */
Parg = get_arg(argv[i]+2, argv[i+1], &i);
erts_proc.max = atoi(Parg);
/* Check of result is delayed until later. This is because +R
may be given after +P. */
break;
case 'S' : /* Was handled in early_init() just read past it */
(void) get_arg(argv[i]+2, argv[i+1], &i);
break;
case 's' : {
char *estr;
int res;
char *sub_param = argv[i]+2;
if (has_prefix("bt", sub_param)) {
arg = get_arg(sub_param+2, argv[i+1], &i);
res = erts_init_scheduler_bind_type_string(arg);
if (res != ERTS_INIT_SCHED_BIND_TYPE_SUCCESS) {
switch (res) {
case ERTS_INIT_SCHED_BIND_TYPE_NOT_SUPPORTED:
estr = "not supported";
break;
case ERTS_INIT_SCHED_BIND_TYPE_ERROR_NO_CPU_TOPOLOGY:
estr = "no cpu topology available";
break;
case ERTS_INIT_SCHED_BIND_TYPE_ERROR_NO_BAD_TYPE:
estr = "invalid type";
break;
default:
estr = "undefined error";
break;
}
erts_fprintf(stderr,
"setting scheduler bind type '%s' failed: %s\n",
arg,
estr);
erts_usage();
}
}
else if (has_prefix("bwt", sub_param)) {
arg = get_arg(sub_param+3, argv[i+1], &i);
if (erts_sched_set_busy_wait_threshold(arg) != 0) {
erts_fprintf(stderr, "bad scheduler busy wait threshold: %s\n",
arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("scheduler wakup threshold: %s\n", arg));
}
else if (has_prefix("cl", sub_param)) {
arg = get_arg(sub_param+2, argv[i+1], &i);
if (sys_strcmp("true", arg) == 0)
erts_sched_compact_load = 1;
else if (sys_strcmp("false", arg) == 0)
erts_sched_compact_load = 0;
else {
erts_fprintf(stderr,
"bad scheduler compact load value '%s'\n",
arg);
erts_usage();
}
}
else if (has_prefix("ct", sub_param)) {
arg = get_arg(sub_param+2, argv[i+1], &i);
res = erts_init_cpu_topology_string(arg);
if (res != ERTS_INIT_CPU_TOPOLOGY_OK) {
switch (res) {
case ERTS_INIT_CPU_TOPOLOGY_INVALID_ID:
estr = "invalid identifier";
break;
case ERTS_INIT_CPU_TOPOLOGY_INVALID_ID_RANGE:
estr = "invalid identifier range";
break;
case ERTS_INIT_CPU_TOPOLOGY_INVALID_HIERARCHY:
estr = "invalid hierarchy";
break;
case ERTS_INIT_CPU_TOPOLOGY_INVALID_ID_TYPE:
estr = "invalid identifier type";
break;
case ERTS_INIT_CPU_TOPOLOGY_INVALID_NODES:
estr = "invalid nodes declaration";
break;
case ERTS_INIT_CPU_TOPOLOGY_MISSING_LID:
estr = "missing logical identifier";
break;
case ERTS_INIT_CPU_TOPOLOGY_NOT_UNIQUE_LIDS:
estr = "not unique logical identifiers";
break;
case ERTS_INIT_CPU_TOPOLOGY_NOT_UNIQUE_ENTITIES:
estr = "not unique entities";
break;
case ERTS_INIT_CPU_TOPOLOGY_MISSING:
estr = "missing cpu topology";
break;
default:
estr = "undefined error";
break;
}
erts_fprintf(stderr,
"bad cpu topology '%s': %s\n",
arg,
estr);
erts_usage();
}
}
else if (sys_strcmp("nsp", sub_param) == 0)
erts_use_sender_punish = 0;
else if (sys_strcmp("wt", sub_param) == 0) {
arg = get_arg(sub_param+2, argv[i+1], &i);
if (erts_sched_set_wakeup_other_thresold(arg) != 0) {
erts_fprintf(stderr, "scheduler wakeup threshold: %s\n",
arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("scheduler wakeup threshold: %s\n", arg));
}
else if (sys_strcmp("ws", sub_param) == 0) {
arg = get_arg(sub_param+2, argv[i+1], &i);
if (erts_sched_set_wakeup_other_type(arg) != 0) {
erts_fprintf(stderr, "scheduler wakeup strategy: %s\n",
arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("scheduler wakeup threshold: %s\n", arg));
}
else if (has_prefix("ss", sub_param)) {
/* suggested stack size (Kilo Words) for scheduler threads */
arg = get_arg(sub_param+2, argv[i+1], &i);
erts_sched_thread_suggested_stack_size = atoi(arg);
if ((erts_sched_thread_suggested_stack_size
< ERTS_SCHED_THREAD_MIN_STACK_SIZE)
|| (erts_sched_thread_suggested_stack_size >
ERTS_SCHED_THREAD_MAX_STACK_SIZE)) {
erts_fprintf(stderr, "bad stack size for scheduler threads %s\n",
arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("suggested scheduler thread stack size %d kilo words\n",
erts_sched_thread_suggested_stack_size));
}
else {
erts_fprintf(stderr, "bad scheduling option %s\n", argv[i]);
erts_usage();
}
break;
}
case 't':
/* set atom table size */
arg = get_arg(argv[i]+2, argv[i+1], &i);
errno = 0;
erts_atom_table_size = strtol(arg, NULL, 10);
if (errno != 0 ||
erts_atom_table_size < MIN_ATOM_TABLE_SIZE ||
erts_atom_table_size > MAX_ATOM_TABLE_SIZE) {
erts_fprintf(stderr, "bad atom table size %s\n", arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("setting maximum number of atoms to %d\n",
erts_atom_table_size));
break;
case 'T' :
arg = get_arg(argv[i]+2, argv[i+1], &i);
errno = 0;
erts_modified_timing_level = atoi(arg);
if ((erts_modified_timing_level == 0 && errno != 0)
|| erts_modified_timing_level < 0
|| erts_modified_timing_level >= ERTS_MODIFIED_TIMING_LEVELS) {
erts_fprintf(stderr, "bad modified timing level %s\n", arg);
erts_usage();
}
else {
VERBOSE(DEBUG_SYSTEM,
("using modified timing level %d\n",
erts_modified_timing_level));
}
break;
case 'R': {
/* set compatibility release */
arg = get_arg(argv[i]+2, argv[i+1], &i);
erts_compat_rel = atoi(arg);
if (erts_compat_rel < ERTS_MIN_COMPAT_REL
|| erts_compat_rel > this_rel_num()) {
erts_fprintf(stderr, "bad compatibility release number %s\n", arg);
erts_usage();
}
ASSERT(ERTS_MIN_COMPAT_REL >= 7);
switch (erts_compat_rel) {
case 7:
case 8:
case 9:
erts_use_r9_pids_ports = 1;
default:
break;
}
break;
}
case 'A': /* Was handled in early init just read past it */
(void) get_arg(argv[i]+2, argv[i+1], &i);
break;
case 'a':
/* suggested stack size (Kilo Words) for threads in thread pool */
arg = get_arg(argv[i]+2, argv[i+1], &i);
erts_async_thread_suggested_stack_size = atoi(arg);
if ((erts_async_thread_suggested_stack_size
< ERTS_ASYNC_THREAD_MIN_STACK_SIZE)
|| (erts_async_thread_suggested_stack_size >
ERTS_ASYNC_THREAD_MAX_STACK_SIZE)) {
erts_fprintf(stderr, "bad stack size for async threads %s\n",
arg);
erts_usage();
}
VERBOSE(DEBUG_SYSTEM,
("suggested async-thread stack size %d kilo words\n",
erts_async_thread_suggested_stack_size));
break;
case 'r': {
char *sub_param = argv[i]+2;
if (has_prefix("g", sub_param)) {
get_arg(sub_param+1, argv[i+1], &i);
/* already handled */
}
else {
erts_ets_realloc_always_moves = 1;
}
break;
}
case 'n': /* XXX obsolete */
break;
case 'c':
if (argv[i][2] == 0) { /* -c: documented option */
erts_disable_tolerant_timeofday = 1;
}
#ifdef ERTS_OPCODE_COUNTER_SUPPORT
else if (argv[i][2] == 'i') { /* -ci: undcoumented option*/
count_instructions = 1;
}
#endif
break;
case 'W':
arg = get_arg(argv[i]+2, argv[i+1], &i);
switch (arg[0]) {
case 'i':
erts_error_logger_warnings = am_info;
break;
case 'w':
erts_error_logger_warnings = am_warning;
break;
case 'e': /* The default */
erts_error_logger_warnings = am_error;
default:
erts_fprintf(stderr, "unrecognized warning_map option %s\n", arg);
erts_usage();
}
break;
case 'z': {
char *sub_param = argv[i]+2;
int new_limit;
if (has_prefix("dbbl", sub_param)) {
arg = get_arg(sub_param+4, argv[i+1], &i);
new_limit = atoi(arg);
if (new_limit < 1 || INT_MAX/1024 < new_limit) {
erts_fprintf(stderr, "Invalid dbbl limit: %d\n", new_limit);
erts_usage();
} else {
erts_dist_buf_busy_limit = new_limit*1024;
}
} else {
erts_fprintf(stderr, "bad -z option %s\n", argv[i]);
erts_usage();
}
break;
}
default:
erts_fprintf(stderr, "%s unknown flag %s\n", argv[0], argv[i]);
erts_usage();
}
i++;
}
/* Delayed check of +P flag */
if (erts_proc.max < ERTS_MIN_PROCESSES
|| erts_proc.max > ERTS_MAX_PROCESSES
|| (erts_use_r9_pids_ports
&& erts_proc.max > ERTS_MAX_R9_PROCESSES)) {
erts_fprintf(stderr, "bad number of processes %s\n", Parg);
erts_usage();
}
/* Restart will not reinstall the break handler */
#ifdef __WIN32__
if (ignore_break)
erts_set_ignore_break();
else if (replace_intr)
erts_replace_intr();
else
init_break_handler();
#else
if (ignore_break)
erts_set_ignore_break();
else if (have_break_handler)
init_break_handler();
if (replace_intr)
erts_replace_intr();
#endif
boot_argc = argc - i; /* Number of arguments to init */
boot_argv = &argv[i];
erl_init(ncpu);
load_preloaded();
erts_end_staging_code_ix();
erts_commit_staging_code_ix();
erts_initialized = 1;
erl_first_process_otp("otp_ring0", NULL, 0, boot_argc, boot_argv);
#ifdef ERTS_SMP
erts_start_schedulers();
/* Let system specific code decide what to do with the main thread... */
erts_sys_main_thread(); /* May or may not return! */
#else
erts_thr_set_main_status(1, 1);
#if ERTS_USE_ASYNC_READY_Q
erts_get_scheduler_data()->aux_work_data.async_ready.queue
= erts_get_async_ready_queue(1);
#endif
set_main_stack_size();
process_main();
#endif
}
int
erts_sys_getenv_raw(char *key, char *value, size_t *size) {
return erts_sys_getenv(key, value, size);
}
