/
process.c
1058 lines (938 loc) · 19.3 KB
/
process.c
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/************************************************
process.c -
$Author$
$Date$
created at: Tue Aug 10 14:30:50 JST 1993
Copyright (C) 1993-1996 Yukihiro Matsumoto
************************************************/
#include "ruby.h"
#include "sig.h"
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef NT
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#else
struct timeval {
long tv_sec; /* seconds */
long tv_usec; /* and microseconds */
};
#endif
#endif /* NT */
struct timeval time_timeval();
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifdef HAVE_GETPRIORITY
# include <sys/resource.h>
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
#include "st.h"
static VALUE
get_pid()
{
return INT2FIX(getpid());
}
static VALUE
get_ppid()
{
#ifdef NT
return INT2FIX(0);
#else
return INT2FIX(getppid());
#endif
}
VALUE last_status = Qnil;
#if !defined(HAVE_WAITPID) && !defined(HAVE_WAIT4)
static st_table *pid_tbl;
#else
# define WAIT_CALL
#endif
static int
rb_waitpid(pid, flags, st)
int pid;
int flags;
int *st;
{
int result;
#if defined(THREAD) && (defined(HAVE_WAITPID) || defined(HAVE_WAIT4))
int oflags = flags;
if (!thread_alone()) { /* there're other threads to run */
flags |= WNOHANG;
}
#endif
#ifdef HAVE_WAITPID
retry:
result = waitpid(pid, st, flags);
if (result < 0) {
if (errno == EINTR) {
#ifdef THREAD
thread_schedule();
#endif
goto retry;
}
return -1;
}
#ifdef THREAD
if (result == 0) {
if (oflags & WNOHANG) return 0;
thread_schedule();
if (thread_alone()) flags = oflags;
goto retry;
}
#endif
#else
#ifdef HAVE_WAIT4
retry:
result = wait4(pid, st, flags, NULL);
if (result < 0) {
if (errno == EINTR) {
goto retry;
}
return -1;
}
#ifdef THREAD
if (result == 0) {
if (oflags & WNOHANG) return 0;
thread_schedule();
if (thread_alone()) flags = oflags;
goto retry;
}
#endif
#else
if (pid_tbl && st_lookup(pid_tbl, pid, st)) {
last_status = INT2FIX(*st);
st_delete(pid_tbl, &pid, NULL);
return pid;
}
if (flags) {
ArgError("Can't do waitpid with flags");
}
for (;;) {
result = wait(st);
if (result < 0) {
if (errno == EINTR) {
#ifdef THREAD
thread_schedule();
#endif
continue;
}
return -1;
}
if (result == pid) {
break;
}
if (!pid_tbl)
pid_tbl = st_init_numtable();
st_insert(pid_tbl, pid, st);
}
#endif
#endif
last_status = INT2FIX(*st);
return result;
}
#ifndef WAIT_CALL
struct wait_data {
int pid;
int status;
};
static int
wait_each(key, value, data)
int key, value;
struct wait_data *data;
{
if (data->status != -1) return ST_STOP;
data->pid = key;
data->status = value;
return ST_DELETE;
}
#endif
static VALUE
f_wait()
{
int pid, state;
#ifndef WAIT_CALL
struct wait_data data;
data.status = -1;
st_foreach(pid_tbl, wait_each, &data);
if (data.status != -1) {
last_status = data.status;
return INT2FIX(data.pid);
}
#endif
while ((pid = wait(&state)) < 0) {
if (errno == EINTR) {
#ifdef THREAD
thread_schedule();
#endif
continue;
}
if (errno == ECHILD) return Qnil;
rb_sys_fail(0);
}
last_status = INT2FIX(state);
return INT2FIX(pid);
}
static VALUE
f_waitpid(obj, vpid, vflags)
VALUE obj, vpid, vflags;
{
int pid, flags, status;
if (NIL_P(vflags)) flags = 0;
else flags = FIX2UINT(vflags);
if ((pid = rb_waitpid(FIX2UINT(vpid), flags, &status)) < 0)
rb_sys_fail(0);
return INT2FIX(pid);
}
char *strtok();
#if defined(THREAD) && defined(HAVE_SETITIMER)
static void
before_exec()
{
struct itimerval tval;
tval.it_interval.tv_sec = 0;
tval.it_interval.tv_usec = 0;
tval.it_value = tval.it_interval;
setitimer(ITIMER_VIRTUAL, &tval, NULL);
}
static void
after_exec()
{
struct itimerval tval;
tval.it_interval.tv_sec = 0;
tval.it_interval.tv_usec = 100000;
tval.it_value = tval.it_interval;
setitimer(ITIMER_VIRTUAL, &tval, NULL);
}
#else
#define before_exec()
#define after_exec()
#endif
extern char *dln_find_exe();
int env_path_tainted();
static void
security(str)
char *str;
{
extern VALUE eSecurityError;
if (rb_safe_level() > 0) {
if (env_path_tainted()) {
Raise(eSecurityError, "Insecure PATH - %s", str);
}
}
}
static int
proc_exec_v(argv, prog)
char **argv;
char *prog;
{
if (prog) {
security(prog);
}
else {
security(argv[0]);
prog = dln_find_exe(argv[0], 0);
if (!prog) {
errno = ENOENT;
return -1;
}
}
#if (defined(MSDOS) && !defined(DJGPP)) || defined(__human68k__)
{
#if defined(__human68k__)
#define COMMAND "command.x"
#else
#define COMMAND "command.com"
#endif
char *extension;
if ((extension = strrchr(prog, '.')) != NULL && strcasecmp(extension, ".bat") == 0) {
char **new_argv;
char *p;
int n;
for (n = 0; argv[n]; n++)
/* no-op */;
new_argv = ALLOCA_N(char *, n + 2);
for (; n > 0; n--)
new_argv[n + 1] = argv[n];
new_argv[1] = strcpy(ALLOCA_N(char, strlen(argv[0]) + 1), argv[0]);
for (p = new_argv[1]; *p != '\0'; p++)
if (*p == '/')
*p = '\\';
new_argv[0] = COMMAND;
argv = new_argv;
prog = dln_find_exe(argv[0], 0);
if (!prog) {
errno = ENOENT;
return -1;
}
}
}
#endif /* MSDOS or __human68k__ */
before_exec();
execv(prog, argv);
after_exec();
return -1;
}
static int
proc_exec_n(argc, argv, progv)
int argc;
VALUE *argv;
VALUE progv;
{
char *prog = 0;
char **args;
int i;
if (progv) {
Check_SafeStr(progv);
prog = RSTRING(progv)->ptr;
}
args = ALLOCA_N(char*, argc+1);
for (i=0; i<argc; i++) {
Check_SafeStr(argv[i]);
args[i] = RSTRING(argv[i])->ptr;
}
args[i] = 0;
if (args[0]) {
return proc_exec_v(args, prog);
}
return -1;
}
int
rb_proc_exec(str)
char *str;
{
char *s = str, *t;
char **argv, **a;
security(str);
for (s=str; *s; s++) {
if (*s != ' ' && !isalpha(*s) && strchr("*?{}[]<>()~&|\\$;'`\"\n",*s)) {
#if defined(MSDOS)
int state;
before_exec();
state = system(str);
after_exec();
if (state != -1)
exit(state);
#else
#if defined(__human68k__)
char *shell = dln_find_exe("sh", 0);
int state = -1;
before_exec();
if (shell)
execl(shell, "sh", "-c", str, (char *) NULL);
else
state = system(str);
after_exec();
if (state != -1)
exit(state);
#else
before_exec();
execl("/bin/sh", "sh", "-c", str, (char *)NULL);
after_exec();
#endif
#endif
return -1;
}
}
a = argv = ALLOCA_N(char*, (s-str)/2+2);
s = ALLOCA_N(char, s-str+1);
strcpy(s, str);
if (*a++ = strtok(s, " \t")) {
while (t = strtok(NULL, " \t")) {
*a++ = t;
}
*a = NULL;
}
if (argv[0]) {
return proc_exec_v(argv, 0);
}
errno = ENOENT;
return -1;
}
#if defined(__human68k__)
static int
proc_spawn_v(argv, prog)
char **argv;
char *prog;
{
char *extension;
int state;
if (prog) {
security(prog);
}
else {
security(argv[0]);
prog = dln_find_exe(argv[0], 0);
if (!prog)
return -1;
}
if ((extension = strrchr(prog, '.')) != NULL && strcasecmp(extension, ".bat") == 0) {
char **new_argv;
char *p;
int n;
for (n = 0; argv[n]; n++)
/* no-op */;
new_argv = ALLOCA_N(char *, n + 2);
for (; n > 0; n--)
new_argv[n + 1] = argv[n];
new_argv[1] = strcpy(ALLOCA_N(char, strlen(argv[0]) + 1), argv[0]);
for (p = new_argv[1]; *p != '\0'; p++)
if (*p == '/')
*p = '\\';
new_argv[0] = COMMAND;
argv = new_argv;
prog = dln_find_exe(argv[0], 0);
if (!prog) {
errno = ENOENT;
return -1;
}
}
before_exec();
state = spawnv(P_WAIT, prog, argv);
after_exec();
return state;
}
static int
proc_spawn_n(argc, argv, prog)
int argc;
VALUE *argv;
VALUE prog;
{
char **args;
int i;
args = ALLOCA_N(char *, argc + 1);
for (i = 0; i < argc; i++) {
Check_SafeStr(argv[i]);
args[i] = RSTRING(argv[i])->ptr;
}
Check_SafeStr(prog);
args[i] = (char *) 0;
if (args[0])
return proc_spawn_v(args, RSTRING(prog)->ptr);
return -1;
}
static int
proc_spawn(str)
char *str;
{
char *s = str, *t;
char **argv, **a;
int state;
for (s = str; *s; s++) {
if (*s != ' ' && !isalpha(*s) && strchr("*?{}[]<>()~&|\\$;'`\"\n",*s)) {
char *shell = dln_find_exe("sh", 0);
before_exec();
state = shell ? spawnl(P_WAIT, shell, "sh", "-c", str, (char *) NULL) : system(str) ;
after_exec();
return state;
}
}
a = argv = ALLOCA_N(char *, (s - str) / 2 + 2);
s = ALLOCA_N(char, s - str + 1);
strcpy(s, str);
if (*a++ = strtok(s, " \t")) {
while (t = strtok(NULL, " \t"))
*a++ = t;
*a = NULL;
}
return argv[0] ? proc_spawn_v(argv, 0) : -1 ;
}
#endif /* __human68k__ */
static VALUE
f_exec(argc, argv)
int argc;
VALUE *argv;
{
VALUE prog = 0;
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
prog = RARRAY(argv[0])->ptr[0];
argv[0] = RARRAY(argv[0])->ptr[1];
}
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
prog = RARRAY(argv[0])->ptr[0];
argv[0] = RARRAY(argv[0])->ptr[1];
}
if (argc == 1 && prog == 0) {
Check_SafeStr(argv[0]);
rb_proc_exec(RSTRING(argv[0])->ptr);
}
else {
proc_exec_n(argc, argv, prog);
}
rb_sys_fail(RSTRING(argv[0])->ptr);
}
static VALUE
f_fork(obj)
VALUE obj;
{
#if !defined(__human68k__)
int pid;
rb_secure(2);
switch (pid = fork()) {
case 0:
#ifdef linux
after_exec();
#endif
if (iterator_p()) {
rb_yield(Qnil);
_exit(0);
}
return Qnil;
case -1:
rb_sys_fail("fork(2)");
return Qnil;
default:
return INT2FIX(pid);
}
#else
rb_notimplement();
#endif
}
static VALUE
f_exit_bang(obj, status)
VALUE obj, status;
{
int code = -1;
rb_secure(2);
if (FIXNUM_P(status)) {
code = INT2FIX(status);
}
_exit(code);
/* not reached */
}
void
rb_syswait(pid)
int pid;
{
RETSIGTYPE (*hfunc)(), (*qfunc)(), (*ifunc)();
int status;
#ifdef SIGHUP
hfunc = signal(SIGHUP, SIG_IGN);
#endif
#ifdef SIGQUIT
qfunc = signal(SIGQUIT, SIG_IGN);
#endif
ifunc = signal(SIGINT, SIG_IGN);
if (rb_waitpid(pid, 0, &status) < 0) rb_sys_fail("wait");
#ifdef SIGHUP
signal(SIGHUP, hfunc);
#endif
#ifdef SIGQUIT
signal(SIGQUIT, qfunc);
#endif
signal(SIGINT, ifunc);
}
static VALUE
f_system(argc, argv)
int argc;
VALUE *argv;
{
#ifdef NT
VALUE cmd;
int state;
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
argv[0] = RARRAY(argv[0])->ptr[0];
}
cmd = ary_join(ary_new4(argc, argv), str_new2(" "));
Check_SafeStr(cmd);
state = do_spawn(RSTRING(cmd)->ptr);
last_status = INT2FIX(state);
if (state == 0) return TRUE;
return FALSE;
#else
#if defined(DJGPP)
VALUE cmd;
int state;
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
argv[0] = RARRAY(argv[0])->ptr[0];
}
cmd = ary_join(ary_new4(argc, argv), str_new2(" "));
Check_SafeStr(cmd);
state = system(RSTRING(cmd)->ptr);
last_status = INT2FIX(state);
if (state == 0) return TRUE;
return FALSE;
#else
#if defined(__human68k__)
VALUE prog = 0;
int i;
int state;
fflush(stdin);
fflush(stdout);
fflush(stderr);
if (argc == 0) {
last_status = INT2FIX(0);
return INT2FIX(0);
}
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
prog = RARRAY(argv[0])->ptr[0];
argv[0] = RARRAY(argv[0])->ptr[1];
}
if (argc == 1 && prog == 0) {
state = proc_spawn(RSTRING(argv[0])->ptr);
}
else {
state = proc_spawn_n(argc, argv, prog);
}
last_status = state == -1 ? INT2FIX(127) : INT2FIX(state);
return state == 0 ? TRUE : FALSE ;
#else
VALUE prog = 0;
int i;
int pid;
fflush(stdin); /* is it really needed? */
fflush(stdout);
fflush(stderr);
if (argc == 0) {
last_status = INT2FIX(0);
return INT2FIX(0);
}
if (TYPE(argv[0]) == T_ARRAY) {
if (RARRAY(argv[0])->len != 2) {
ArgError("wrong first argument");
}
prog = RARRAY(argv[0])->ptr[0];
argv[0] = RARRAY(argv[0])->ptr[1];
}
retry:
switch (pid = vfork()) {
case 0:
if (argc == 1 && prog == 0) {
rb_proc_exec(RSTRING(argv[0])->ptr);
}
else {
proc_exec_n(argc, argv, prog);
}
_exit(127);
break; /* not reached */
case -1:
if (errno == EAGAIN) {
#ifdef THREAD
thread_sleep(1);
#else
sleep(1);
#endif
goto retry;
}
rb_sys_fail(0);
break;
default:
rb_syswait(pid);
}
if (last_status == INT2FIX(0)) return TRUE;
return FALSE;
#endif
#endif
#endif
}
static VALUE
f_sleep(argc, argv)
int argc;
VALUE *argv;
{
int beg, end;
beg = time(0);
#ifdef THREAD
if (argc == 0) {
thread_sleep_forever();
}
else if (argc == 1) {
thread_wait_for(time_timeval(argv[0]));
}
#else
if (argc == 0) {
TRAP_BEG;
sleep((32767<<16)+32767);
TRAP_END;
}
else if (argc == 1) {
struct timeval tv;
int n;
tv = time_timeval(argv[0]);
TRAP_BEG;
n = select(0, 0, 0, 0, &tv);
TRAP_END;
if (n<0) rb_sys_fail(0);
}
#endif
else {
ArgError("wrong # of arguments");
}
end = time(0) - beg;
return INT2FIX(end);
}
#if !defined(NT) && !defined(DJGPP) && !defined(__human68k__)
static VALUE
proc_getpgrp(argc, argv)
int argc;
VALUE *argv;
{
int pgrp;
#ifdef BSD_GETPGRP
VALUE vpid;
int pid;
rb_scan_args(argc, argv, "01", &vpid);
pid = NUM2INT(vpid);
pgrp = BSD_GETPGRP(pid);
#else
rb_scan_args(argc, argv, "0");
pgrp = getpgrp();
#endif
if (pgrp < 0) rb_sys_fail(0);
return INT2FIX(pgrp);
}
static VALUE
proc_setpgrp(argc, argv)
int argc;
VALUE *argv;
{
#ifdef BSD_SETPGRP
VALUE pid, pgrp;
int ipid, ipgrp;
rb_scan_args(argc, argv, "02", &pid, &pgrp);
ipid = NUM2INT(pid);
ipgrp = NUM2INT(pgrp);
if (BSD_SETPGRP(ipid, ipgrp) < 0) rb_sys_fail(0);
#else
rb_scan_args(argc, argv, "0");
if (setpgrp() < 0) rb_sys_fail(0);
#endif
return Qnil;
}
#ifdef HAVE_SETPGID
static VALUE
proc_setpgid(obj, pid, pgrp)
VALUE obj, pid, pgrp;
{
int ipid, ipgrp;
ipid = NUM2INT(pid);
ipgrp = NUM2INT(pgrp);
if (setpgid(ipid, ipgrp) < 0) rb_sys_fail(0);
return Qnil;
}
#endif
static VALUE
proc_getpriority(obj, which, who)
VALUE obj, which, who;
{
#ifdef HAVE_GETPRIORITY
int prio, iwhich, iwho;
iwhich = NUM2INT(which);
iwho = NUM2INT(who);
prio = getpriority(iwhich, iwho);
if (prio < 0) rb_sys_fail(0);
return INT2FIX(prio);
#else
rb_notimplement();
#endif
}
static VALUE
proc_setpriority(obj, which, who, prio)
VALUE obj, which, who, prio;
{
#ifdef HAVE_GETPRIORITY
int iwhich, iwho, iprio;
iwhich = NUM2INT(which);
iwho = NUM2INT(who);
iprio = NUM2INT(prio);
if (setpriority(iwhich, iwho, iprio) < 0)
rb_sys_fail(0);
return INT2FIX(0);
#else
rb_notimplement();
#endif
}
#endif
static VALUE
proc_getuid(obj)
VALUE obj;
{
int uid = getuid();
return INT2FIX(uid);
}
static VALUE
proc_setuid(obj, id)
VALUE obj, id;
{
int uid;
uid = NUM2INT(id);
#ifdef HAVE_SETRUID
setruid(uid);
#else
#ifdef HAVE_SETREUID
setreuid(uid, -1);
#else
{
if (geteuid() == uid)
setuid(uid);
else
rb_notimplement();
}
#endif
#endif
return INT2FIX(uid);
}
static VALUE
proc_getgid(obj)
VALUE obj;
{
int gid = getgid();
return INT2FIX(gid);
}
static VALUE
proc_setgid(obj, id)
VALUE obj, id;
{
int gid;
gid = NUM2INT(id);
#ifdef HAS_SETRGID
setrgid((GIDTYPE)gid);
#else
#ifdef HAVE_SETREGID
setregid(gid, -1);
#else
{
if (getegid() == gid)
setgid(gid);
else
rb_notimplement();
}
#endif
#endif
return INT2FIX(gid);
}
static VALUE
proc_geteuid(obj)
VALUE obj;
{
int euid = geteuid();
return INT2FIX(euid);
}
static VALUE
proc_seteuid(obj, euid)
VALUE obj, euid;
{
#ifdef HAVE_SETEUID
if (seteuid(NUM2INT(euid)) < 0) rb_sys_fail(0);
#else
#ifdef HAVE_SETREUID
if (setreuid(-1, NUM2INT(euid)) < 0) rb_sys_fail(0);
#else
euid = NUM2INT(euid);
if (euid == getuid())
setuid(euid);
else
rb_notimplement();
#endif
#endif
return euid;
}
static VALUE
proc_getegid(obj)
VALUE obj;
{
int egid = getegid();
return INT2FIX(egid);
}
static VALUE
proc_setegid(obj, egid)
VALUE obj, egid;
{
#ifdef HAVE_SETEGID
if (setegid(NUM2INT(egid)) < 0) rb_sys_fail(0);
#else
#ifdef HAVE_SETREGID
if (setregid(-1, NUM2INT(egid)) < 0) rb_sys_fail(0);
#else
egid = NUM2INT(egid);
if (egid == getgid())
setgid(egid);
else
rb_notimplement();
#endif
#endif
return egid;
}
VALUE mProcess;
extern VALUE f_kill();
void
Init_process()
{
rb_define_virtual_variable("$$", get_pid, 0);
rb_define_readonly_variable("$?", &last_status);
rb_define_global_function("exec", f_exec, -1);
#ifndef NT
rb_define_global_function("fork", f_fork, 0);
#endif