mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
3721df734c
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18785 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
470 lines
12 KiB
C
470 lines
12 KiB
C
#include "ruby/config.h"
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#ifdef RUBY_EXTCONF_H
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#include RUBY_EXTCONF_H
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <pwd.h>
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_LIBUTIL_H
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#include <libutil.h>
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#endif
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#ifdef HAVE_PTY_H
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#include <pty.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#else
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#define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
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#endif
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#include <ctype.h>
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#include "ruby/ruby.h"
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#include "ruby/io.h"
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#include "ruby/util.h"
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#include <signal.h>
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#ifdef HAVE_SYS_STROPTS_H
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#include <sys/stropts.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#define DEVICELEN 16
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#if !defined(HAVE_OPENPTY)
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#if defined(__hpux)
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static const
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char MasterDevice[] = "/dev/ptym/pty%s",
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SlaveDevice[] = "/dev/pty/tty%s",
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*const deviceNo[] = {
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"p0","p1","p2","p3","p4","p5","p6","p7",
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"p8","p9","pa","pb","pc","pd","pe","pf",
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"q0","q1","q2","q3","q4","q5","q6","q7",
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"q8","q9","qa","qb","qc","qd","qe","qf",
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"r0","r1","r2","r3","r4","r5","r6","r7",
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"r8","r9","ra","rb","rc","rd","re","rf",
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"s0","s1","s2","s3","s4","s5","s6","s7",
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"s8","s9","sa","sb","sc","sd","se","sf",
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"t0","t1","t2","t3","t4","t5","t6","t7",
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"t8","t9","ta","tb","tc","td","te","tf",
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"u0","u1","u2","u3","u4","u5","u6","u7",
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"u8","u9","ua","ub","uc","ud","ue","uf",
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"v0","v1","v2","v3","v4","v5","v6","v7",
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"v8","v9","va","vb","vc","vd","ve","vf",
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"w0","w1","w2","w3","w4","w5","w6","w7",
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"w8","w9","wa","wb","wc","wd","we","wf",
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0,
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};
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#elif defined(_IBMESA) /* AIX/ESA */
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static const
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char MasterDevice[] = "/dev/ptyp%s",
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SlaveDevice[] = "/dev/ttyp%s",
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*const deviceNo[] = {
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"00","01","02","03","04","05","06","07","08","09","0a","0b","0c","0d","0e","0f",
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"10","11","12","13","14","15","16","17","18","19","1a","1b","1c","1d","1e","1f",
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"20","21","22","23","24","25","26","27","28","29","2a","2b","2c","2d","2e","2f",
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"30","31","32","33","34","35","36","37","38","39","3a","3b","3c","3d","3e","3f",
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"40","41","42","43","44","45","46","47","48","49","4a","4b","4c","4d","4e","4f",
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"50","51","52","53","54","55","56","57","58","59","5a","5b","5c","5d","5e","5f",
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"60","61","62","63","64","65","66","67","68","69","6a","6b","6c","6d","6e","6f",
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"70","71","72","73","74","75","76","77","78","79","7a","7b","7c","7d","7e","7f",
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"80","81","82","83","84","85","86","87","88","89","8a","8b","8c","8d","8e","8f",
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"90","91","92","93","94","95","96","97","98","99","9a","9b","9c","9d","9e","9f",
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"a0","a1","a2","a3","a4","a5","a6","a7","a8","a9","aa","ab","ac","ad","ae","af",
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"b0","b1","b2","b3","b4","b5","b6","b7","b8","b9","ba","bb","bc","bd","be","bf",
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"c0","c1","c2","c3","c4","c5","c6","c7","c8","c9","ca","cb","cc","cd","ce","cf",
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"d0","d1","d2","d3","d4","d5","d6","d7","d8","d9","da","db","dc","dd","de","df",
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"e0","e1","e2","e3","e4","e5","e6","e7","e8","e9","ea","eb","ec","ed","ee","ef",
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"f0","f1","f2","f3","f4","f5","f6","f7","f8","f9","fa","fb","fc","fd","fe","ff",
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};
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#elif !defined(HAVE_PTSNAME)
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static const
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char MasterDevice[] = "/dev/pty%s",
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SlaveDevice[] = "/dev/tty%s",
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*const deviceNo[] = {
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"p0","p1","p2","p3","p4","p5","p6","p7",
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"p8","p9","pa","pb","pc","pd","pe","pf",
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"q0","q1","q2","q3","q4","q5","q6","q7",
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"q8","q9","qa","qb","qc","qd","qe","qf",
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"r0","r1","r2","r3","r4","r5","r6","r7",
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"r8","r9","ra","rb","rc","rd","re","rf",
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"s0","s1","s2","s3","s4","s5","s6","s7",
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"s8","s9","sa","sb","sc","sd","se","sf",
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0,
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};
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#endif
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#endif /* !defined(HAVE_OPENPTY) */
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#ifndef HAVE_SETEUID
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# ifdef HAVE_SETREUID
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# define seteuid(e) setreuid(-1, (e))
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# else /* NOT HAVE_SETREUID */
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# ifdef HAVE_SETRESUID
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# define seteuid(e) setresuid(-1, (e), -1)
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# else /* NOT HAVE_SETRESUID */
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/* I can't set euid. (;_;) */
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# endif /* HAVE_SETRESUID */
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# endif /* HAVE_SETREUID */
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#endif /* NO_SETEUID */
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static VALUE eChildExited;
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static VALUE
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echild_status(VALUE self)
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{
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return rb_ivar_get(self, rb_intern("status"));
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}
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struct pty_info {
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int fd;
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rb_pid_t child_pid;
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VALUE thread;
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};
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static void
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raise_from_wait(const char *state, const struct pty_info *info)
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{
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char buf[1024];
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VALUE exc;
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snprintf(buf, sizeof(buf), "pty - %s: %ld", state, (long)info->child_pid);
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exc = rb_exc_new2(eChildExited, buf);
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rb_iv_set(exc, "status", rb_last_status_get());
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rb_funcall(info->thread, rb_intern("raise"), 1, exc);
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}
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static VALUE
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pty_syswait(void *arg)
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{
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const struct pty_info *const info = arg;
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rb_pid_t cpid;
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int status;
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for (;;) {
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cpid = rb_waitpid(info->child_pid, &status, WUNTRACED);
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if (cpid == -1) return Qnil;
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#if defined(WIFSTOPPED)
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#elif defined(IF_STOPPED)
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#define WIFSTOPPED(status) IF_STOPPED(status)
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#else
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---->> Either IF_STOPPED or WIFSTOPPED is needed <<----
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#endif /* WIFSTOPPED | IF_STOPPED */
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if (WIFSTOPPED(status)) { /* suspend */
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raise_from_wait("stopped", info);
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}
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else if (kill(info->child_pid, 0) == 0) {
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raise_from_wait("changed", info);
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}
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else {
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raise_from_wait("exited", info);
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return Qnil;
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}
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}
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}
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static void getDevice(int*, int*, char [DEVICELEN]);
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struct exec_info {
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int argc;
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VALUE *argv;
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};
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static VALUE
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pty_exec(VALUE v)
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{
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struct exec_info *arg = (struct exec_info *)v;
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return rb_f_exec(arg->argc, arg->argv);
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}
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static void
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establishShell(int argc, VALUE *argv, struct pty_info *info,
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char SlaveName[DEVICELEN])
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{
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int master,slave;
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rb_pid_t pid;
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char *p, tmp, *getenv();
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struct passwd *pwent;
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VALUE v;
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struct exec_info arg;
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int status;
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if (argc == 0) {
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const char *shellname;
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if ((p = getenv("SHELL")) != NULL) {
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shellname = p;
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}
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else {
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pwent = getpwuid(getuid());
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if (pwent && pwent->pw_shell)
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shellname = pwent->pw_shell;
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else
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shellname = "/bin/sh";
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}
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v = rb_str_new2(shellname);
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argc = 1;
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argv = &v;
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}
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getDevice(&master, &slave, SlaveName);
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info->thread = rb_thread_current();
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if ((pid = fork()) < 0) {
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close(master);
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close(slave);
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rb_sys_fail("fork failed");
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}
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if (pid == 0) { /* child */
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/*
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* Set free from process group and controlling terminal
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*/
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#ifdef HAVE_SETSID
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(void) setsid();
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#else /* HAS_SETSID */
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# ifdef HAVE_SETPGRP
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# ifdef SETGRP_VOID
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if (setpgrp() == -1)
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perror("setpgrp()");
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# else /* SETGRP_VOID */
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if (setpgrp(0, getpid()) == -1)
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rb_sys_fail("setpgrp()");
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{
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int i = open("/dev/tty", O_RDONLY);
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if (i < 0) rb_sys_fail("/dev/tty");
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if (ioctl(i, TIOCNOTTY, (char *)0))
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perror("ioctl(TIOCNOTTY)");
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close(i);
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}
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# endif /* SETGRP_VOID */
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# endif /* HAVE_SETPGRP */
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#endif /* HAS_SETSID */
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/*
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* obtain new controlling terminal
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*/
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#if defined(TIOCSCTTY)
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close(master);
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(void) ioctl(slave, TIOCSCTTY, (char *)0);
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/* errors ignored for sun */
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#else
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close(slave);
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slave = open(SlaveName, O_RDWR);
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if (slave < 0) {
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perror("open: pty slave");
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_exit(1);
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}
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close(master);
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#endif
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write(slave, "", 1);
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dup2(slave,0);
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dup2(slave,1);
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dup2(slave,2);
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close(slave);
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#if defined(HAVE_SETEUID) || defined(HAVE_SETREUID) || defined(HAVE_SETRESUID)
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seteuid(getuid());
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#endif
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arg.argc = argc;
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arg.argv = argv;
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rb_protect(pty_exec, (VALUE)&arg, &status);
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sleep(1);
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_exit(1);
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}
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read(master, &tmp, 1);
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close(slave);
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info->child_pid = pid;
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info->fd = master;
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}
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static VALUE
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pty_finalize_syswait(struct pty_info *info)
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{
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rb_thread_kill(info->thread);
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rb_funcall(info->thread, rb_intern("value"), 0);
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rb_detach_process(info->child_pid);
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return Qnil;
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}
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static int
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get_device_once(int *master, int *slave, char SlaveName[DEVICELEN], int fail)
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{
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#if defined HAVE_OPENPTY
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/*
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* Use openpty(3) of 4.3BSD Reno and later,
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* or the same interface function.
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*/
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if (openpty(master, slave, SlaveName,
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(struct termios *)0, (struct winsize *)0) == -1) {
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if (!fail) return -1;
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rb_raise(rb_eRuntimeError, "openpty() failed");
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}
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return 0;
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#elif defined HAVE__GETPTY
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char *name;
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if (!(name = _getpty(master, O_RDWR, 0622, 0))) {
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if (!fail) return -1;
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rb_raise(rb_eRuntimeError, "_getpty() failed");
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}
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*slave = open(name, O_RDWR);
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strlcpy(SlaveName, name, sizeof SlaveName);
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return 0;
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#else /* HAVE__GETPTY */
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int i,j;
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#ifdef HAVE_PTSNAME
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char *pn;
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void (*s)();
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extern char *ptsname(int);
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extern int unlockpt(int);
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extern int grantpt(int);
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if((i = open("/dev/ptmx", O_RDWR, 0)) != -1) {
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s = signal(SIGCHLD, SIG_DFL);
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if(grantpt(i) != -1) {
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signal(SIGCHLD, s);
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if(unlockpt(i) != -1) {
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if((pn = ptsname(i)) != NULL) {
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if((j = open(pn, O_RDWR, 0)) != -1) {
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#if defined I_PUSH && !defined linux
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if(ioctl(j, I_PUSH, "ptem") != -1) {
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if(ioctl(j, I_PUSH, "ldterm") != -1) {
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ioctl(j, I_PUSH, "ttcompat");
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#endif
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*master = i;
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*slave = j;
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strlcpy(SlaveName, pn, sizeof SlaveName);
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return 0;
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#if defined I_PUSH && !defined linux
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}
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}
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#endif
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}
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}
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}
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}
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close(i);
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}
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if (!fail) rb_raise(rb_eRuntimeError, "can't get Master/Slave device");
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return -1;
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#else
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const char *const *p;
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char MasterName[DEVICELEN];
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for (p = deviceNo; *p != NULL; p++) {
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snprintf(MasterName, sizeof MasterName, MasterDevice, *p);
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if ((i = open(MasterName,O_RDWR,0)) >= 0) {
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*master = i;
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snprintf(SlaveName, sizeof SlaveName, SlaveDevice, *p);
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if ((j = open(SlaveName,O_RDWR,0)) >= 0) {
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*slave = j;
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chown(SlaveName, getuid(), getgid());
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chmod(SlaveName, 0622);
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return 0;
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}
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close(i);
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}
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}
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if (fail) rb_raise(rb_eRuntimeError, "can't get %s", SlaveName);
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return -1;
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#endif
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#endif
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}
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static void
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getDevice(int *master, int *slave, char SlaveName[DEVICELEN])
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{
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if (get_device_once(master, slave, SlaveName, 0)) {
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rb_gc();
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get_device_once(master, slave, SlaveName, 1);
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}
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}
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/* ruby function: getpty */
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static VALUE
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pty_getpty(int argc, VALUE *argv, VALUE self)
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{
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VALUE res;
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struct pty_info info;
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struct pty_info thinfo;
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rb_io_t *wfptr,*rfptr;
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VALUE rport = rb_obj_alloc(rb_cFile);
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VALUE wport = rb_obj_alloc(rb_cFile);
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char SlaveName[DEVICELEN];
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MakeOpenFile(rport, rfptr);
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MakeOpenFile(wport, wfptr);
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establishShell(argc, argv, &info, SlaveName);
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rfptr->mode = rb_io_mode_flags("r");
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rfptr->fd = info.fd;
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rfptr->pathv = rb_obj_freeze(rb_str_new_cstr(SlaveName));
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wfptr->mode = rb_io_mode_flags("w") | FMODE_SYNC;
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wfptr->fd = dup(info.fd);
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wfptr->pathv = rfptr->pathv;
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res = rb_ary_new2(3);
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rb_ary_store(res,0,(VALUE)rport);
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rb_ary_store(res,1,(VALUE)wport);
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rb_ary_store(res,2,PIDT2NUM(info.child_pid));
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thinfo.thread = rb_thread_create(pty_syswait, (void*)&info);
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thinfo.child_pid = info.child_pid;
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rb_thread_schedule();
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if (rb_block_given_p()) {
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rb_ensure(rb_yield, res, pty_finalize_syswait, (VALUE)&thinfo);
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return Qnil;
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}
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return res;
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}
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/* ruby function: protect_signal - obsolete */
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static VALUE
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pty_protect(VALUE self)
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{
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rb_warn("PTY::protect_signal is no longer needed");
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rb_yield(Qnil);
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return self;
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}
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/* ruby function: reset_signal - obsolete */
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static VALUE
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pty_reset_signal(VALUE self)
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{
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rb_warn("PTY::reset_signal is no longer needed");
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return self;
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}
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static VALUE cPTY;
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void
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Init_pty()
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{
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cPTY = rb_define_module("PTY");
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rb_define_module_function(cPTY,"getpty",pty_getpty,-1);
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rb_define_module_function(cPTY,"spawn",pty_getpty,-1);
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rb_define_module_function(cPTY,"protect_signal",pty_protect,0);
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rb_define_module_function(cPTY,"reset_signal",pty_reset_signal,0);
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eChildExited = rb_define_class_under(cPTY,"ChildExited",rb_eRuntimeError);
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rb_define_method(eChildExited,"status",echild_status,0);
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}
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