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-rw-r--r--ext/pty/pty.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/ext/pty/pty.c b/ext/pty/pty.c
new file mode 100644
index 0000000000..0995220995
--- /dev/null
+++ b/ext/pty/pty.c
@@ -0,0 +1,485 @@
+#include "config.h"
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pwd.h>
+#if !defined(HAVE_OPENPTY) && !defined(HAVE__GETPTY)
+#include <sys/ioctl.h>
+#endif
+#include <sys/wait.h>
+#include <ctype.h>
+
+#include <ruby.h>
+#include <rubyio.h>
+
+#include <signal.h>
+#ifdef HAVE_SYS_STROPTS_H
+#include <sys/stropts.h>
+#endif
+
+#define DEVICELEN 16
+
+#if !defined(HAVE_OPENPTY)
+#ifdef hpux
+char *MasterDevice = "/dev/ptym/pty%s",
+ *SlaveDevice = "/dev/pty/tty%s",
+ *deviceNo[] = {
+ "p0","p1","p2","p3","p4","p5","p6","p7",
+ "p8","p9","pa","pb","pc","pd","pe","pf",
+ "q0","q1","q2","q3","q4","q5","q6","q7",
+ "q8","q9","qa","qb","qc","qd","qe","qf",
+ "r0","r1","r2","r3","r4","r5","r6","r7",
+ "r8","r9","ra","rb","rc","rd","re","rf",
+ "s0","s1","s2","s3","s4","s5","s6","s7",
+ "s8","s9","sa","sb","sc","sd","se","sf",
+ "t0","t1","t2","t3","t4","t5","t6","t7",
+ "t8","t9","ta","tb","tc","td","te","tf",
+ "u0","u1","u2","u3","u4","u5","u6","u7",
+ "u8","u9","ua","ub","uc","ud","ue","uf",
+ "v0","v1","v2","v3","v4","v5","v6","v7",
+ "v8","v9","va","vb","vc","vd","ve","vf",
+ "w0","w1","w2","w3","w4","w5","w6","w7",
+ "w8","w9","wa","wb","wc","wd","we","wf",
+ 0,
+ };
+#else /* NOT HPUX */
+#ifdef _IBMESA /* AIX/ESA */
+char *MasterDevice = "/dev/ptyp%s",
+ *SlaveDevice = "/dev/ttyp%s",
+ *deviceNo[] = {
+"00","01","02","03","04","05","06","07","08","09","0a","0b","0c","0d","0e","0f",
+"10","11","12","13","14","15","16","17","18","19","1a","1b","1c","1d","1e","1f",
+"20","21","22","23","24","25","26","27","28","29","2a","2b","2c","2d","2e","2f",
+"30","31","32","33","34","35","36","37","38","39","3a","3b","3c","3d","3e","3f",
+"40","41","42","43","44","45","46","47","48","49","4a","4b","4c","4d","4e","4f",
+"50","51","52","53","54","55","56","57","58","59","5a","5b","5c","5d","5e","5f",
+"60","61","62","63","64","65","66","67","68","69","6a","6b","6c","6d","6e","6f",
+"70","71","72","73","74","75","76","77","78","79","7a","7b","7c","7d","7e","7f",
+"80","81","82","83","84","85","86","87","88","89","8a","8b","8c","8d","8e","8f",
+"90","91","92","93","94","95","96","97","98","99","9a","9b","9c","9d","9e","9f",
+"a0","a1","a2","a3","a4","a5","a6","a7","a8","a9","aa","ab","ac","ad","ae","af",
+"b0","b1","b2","b3","b4","b5","b6","b7","b8","b9","ba","bb","bc","bd","be","bf",
+"c0","c1","c2","c3","c4","c5","c6","c7","c8","c9","ca","cb","cc","cd","ce","cf",
+"d0","d1","d2","d3","d4","d5","d6","d7","d8","d9","da","db","dc","dd","de","df",
+"e0","e1","e2","e3","e4","e5","e6","e7","e8","e9","ea","eb","ec","ed","ee","ef",
+"f0","f1","f2","f3","f4","f5","f6","f7","f8","f9","fa","fb","fc","fd","fe","ff",
+ };
+#else
+char *MasterDevice = "/dev/pty%s",
+ *SlaveDevice = "/dev/tty%s",
+ *deviceNo[] = {
+ "p0","p1","p2","p3","p4","p5","p6","p7",
+ "p8","p9","pa","pb","pc","pd","pe","pf",
+ "q0","q1","q2","q3","q4","q5","q6","q7",
+ "q8","q9","qa","qb","qc","qd","qe","qf",
+ "r0","r1","r2","r3","r4","r5","r6","r7",
+ "r8","r9","ra","rb","rc","rd","re","rf",
+ 0,
+ };
+#endif /* _IBMESA */
+#endif /* HPUX */
+#endif /* !defined(HAVE_OPENPTY) */
+
+char SlaveName[DEVICELEN];
+
+extern int errno;
+
+#define MAX_PTY 16
+static int n_pty,last_pty;
+static int chld_pid[MAX_PTY];
+
+#ifndef HAVE_SETEUID
+# ifdef HAVE_SETREUID
+# define seteuid(e) setreuid(-1, (e))
+# else /* NOT HAVE_SETREUID */
+# ifdef HAVE_SETRESUID
+# define seteuid(e) setresuid(-1, (e), -1)
+# else /* NOT HAVE_SETRESUID */
+ /* I can't set euid. (;_;) */
+# endif /* HAVE_SETRESUID */
+# endif /* HAVE_SETREUID */
+#endif /* NO_SETEUID */
+
+struct pty_info {
+ int fd;
+ pid_t child_pid;
+};
+
+static void
+set_signal_action(RETSIGTYPE (*action)())
+{
+#ifdef hpux
+ struct sigvec sv;
+ /*
+ * signal SIGCHLD should be delivered on stop of the child
+ */
+ sv.sv_handler = action;
+ sv.sv_mask = sigmask(SIGCHLD);
+ sv.sv_flags = SV_BSDSIG;
+ sigvector(SIGCHLD, &sv, (struct sigvec *) 0);
+#else /* not HPUX */
+#if defined(SA_NOCLDSTOP)
+ struct sigaction sa;
+ /*
+ * signal SIGCHLD should be delivered on stop of the child
+ * (for SVR4)
+ */
+ sa.sa_handler = action;
+ sigemptyset(&sa.sa_mask);
+ sigaddset(&sa.sa_mask, SIGCHLD);
+ sa.sa_flags = 0; /* SA_NOCLDSTOP flag is removed */
+ sigaction(SIGCHLD, &sa, (struct sigaction *) 0);
+#else
+ signal(SIGCHLD,action);
+#endif
+#endif /* not HPUX */
+
+}
+
+static void
+reset_signal_action()
+{
+ set_signal_action(SIG_DFL);
+}
+
+static RETSIGTYPE
+chld_changed()
+{
+ int cpid;
+ int i,n = -1;
+ int statusp;
+
+ for (;;) {
+#ifdef HAVE_WAITPID
+ cpid = waitpid(-1, &statusp, WUNTRACED|WNOHANG);
+#else
+ cpid = wait3((int *) &statusp, WUNTRACED|WNOHANG, 0);
+#endif
+ if (cpid == 0 || cpid == -1)
+ return;
+ for (i = 0; i < last_pty; i++) {
+ if (chld_pid[i] == cpid) {
+ n = i;
+ goto catched;
+ }
+ }
+ rb_raise(rb_eRuntimeError, "fork: %d", cpid);
+ }
+ catched:
+
+#ifdef IF_STOPPED
+ if (IF_STOPPED(statusp)) { /* suspend */
+ rb_raise(rb_eRuntimeError, "Stopped: %d",cpid);
+ }
+#else
+#ifdef WIFSTOPPED
+ if (WIFSTOPPED(statusp)) { /* suspend */
+ rb_raise(rb_eRuntimeError, "Stopped: %d",cpid);
+ }
+#else
+#error "Either IF_STOPPED or WIFSTOPPED is needed"
+#endif /* WIFSTOPPED */
+#endif /* IF_STOPPED */
+ if (n >= 0) {
+ chld_pid[n] = 0;
+ n_pty--;
+ if (n_pty == 0)
+ reset_signal_action();
+ }
+ rb_raise(rb_eRuntimeError, "Child_changed: %d",cpid);
+}
+
+static void getDevice _((int*, int*));
+
+static void
+establishShell(char *shellname, struct pty_info *info)
+{
+ static int i,j,master,slave,currentPid;
+ static char procName[32];
+ char *p,*getenv();
+ struct passwd *pwent;
+ RETSIGTYPE chld_changed();
+
+ if (shellname[0] == '\0') {
+ if ((p = getenv("SHELL")) != NULL) {
+ shellname = p;
+ }
+ else {
+ pwent = getpwuid(getuid());
+ if (pwent && pwent->pw_shell)
+ shellname = pwent->pw_shell;
+ else
+ shellname = "/bin/sh";
+ }
+ }
+ getDevice(&master,&slave);
+
+ currentPid = getpid();
+ set_signal_action(chld_changed);
+ if((i = vfork()) < 0) {
+ rb_sys_fail("fork failed");
+ }
+
+ if(i == 0) { /* child */
+ int argc;
+ char *argv[1024];
+ currentPid = getpid();
+
+ /*
+ * Set free from process group and controlling terminal
+ */
+#ifdef HAVE_SETSID
+ (void) setsid();
+#else /* HAS_SETSID */
+# ifdef HAVE_SETPGRP
+# ifdef SETGRP_VOID
+ if (setpgrp() == -1)
+ perror("setpgrp()");
+# else /* SETGRP_VOID */
+ if (setpgrp(0, currentPid) == -1)
+ rb_sys_fail("setpgrp()");
+ if ((i = open("/dev/tty", O_RDONLY)) < 0)
+ rb_sys_fail("/dev/tty");
+ else {
+ if (ioctl(i, TIOCNOTTY, (char *)0))
+ perror("ioctl(TIOCNOTTY)");
+ close(i);
+ }
+# endif /* SETGRP_VOID */
+# endif /* HAVE_SETPGRP */
+#endif /* HAS_SETSID */
+
+ /*
+ * obtain new controlling terminal
+ */
+#if defined(TIOCSCTTY)
+ close(master);
+ (void) ioctl(slave, TIOCSCTTY, (char *)0);
+ /* errors ignored for sun */
+#else
+ close(slave);
+ slave = open(SlaveName, O_RDWR);
+ if (slave < 0) {
+ perror("open: pty slave");
+ _exit(1);
+ }
+ close(master);
+#endif
+ dup2(slave,0);
+ dup2(slave,1);
+ dup2(slave,2);
+ close(slave);
+
+ seteuid(getuid());
+
+ argc = 0;
+ for (i = 0; shellname[i];) {
+ while (isspace(shellname[i])) i++;
+ for (j = i; shellname[j] && !isspace(shellname[j]); j++);
+ argv[argc] = (char*)xmalloc(j-i+1);
+ strncpy(argv[argc],&shellname[i],j-i);
+ argv[argc][j-i] = 0;
+ i = j;
+ argc++;
+ }
+ argv[argc] = NULL;
+ execvp(argv[0],argv);
+ sleep(1);
+ _exit(1);
+ }
+
+ close(slave);
+
+ if (n_pty == last_pty) {
+ chld_pid[n_pty] = i;
+ n_pty++;
+ last_pty++;
+ }
+ else {
+ for (j = 0; j < last_pty; j++) {
+ if (chld_pid[j] == 0) {
+ chld_pid[j] = i;
+ n_pty++;
+ }
+ }
+ }
+ info->child_pid = i;
+ info->fd = master;
+}
+
+#ifdef HAVE_OPENPTY
+/*
+ * Use openpty(3) of 4.3BSD Reno and later,
+ * or the same interface function.
+ */
+static void
+getDevice(master,slave)
+ int *master,*slave;
+{
+ if (openpty(master, slave, SlaveName,
+ (struct termios *)0, (struct winsize *)0) == -1) {
+ rb_raise(rb_eRuntimeError, "openpty() failed");
+ }
+}
+#else /* HAVE_OPENPTY */
+#ifdef HAVE__GETPTY
+static void
+getDevice(master,slave)
+ int *master,*slave;
+{
+ char *name;
+
+ if (!(name = _getpty(master, O_RDWR, 0622, 0))) {
+ rb_raise(rb_eRuntimeError, "_getpty() failed");
+ }
+
+ *slave = open(name, O_RDWR);
+ strcpy(SlaveName, name);
+}
+#else /* HAVE__GETPTY */
+static void
+getDevice(master,slave)
+ int *master,*slave;
+{
+ char **p;
+ int i,j;
+ char MasterName[DEVICELEN];
+
+#ifdef HAVE_DEV_PTMX
+ char *pn;
+ void (*s)();
+
+ extern char *ptsname(int);
+ extern int unlockpt(int);
+ extern int grantpt(int);
+
+ if((i = open("/dev/ptmx", O_RDWR, 0)) != -1) {
+ s = signal(SIGCHLD, SIG_DFL);
+ if(grantpt(i) != -1) {
+ signal(SIGCHLD, s);
+ if(unlockpt(i) != -1) {
+ if((pn = ptsname(i)) != NULL) {
+ if((j = open(pn, O_RDWR, 0)) != -1) {
+ if(ioctl(j, I_PUSH, "ptem") != -1) {
+ if(ioctl(j, I_PUSH, "ldterm") != -1) {
+ *master = i;
+ *slave = j;
+ strcpy(SlaveName, pn);
+ return;
+ }
+ }
+ }
+ }
+ }
+ }
+ close(i);
+ }
+ rb_raise(rb_eRuntimeError, "Cannot get Master/Slave device");
+#else
+ for (p = deviceNo; *p != NULL; p++) {
+ sprintf(MasterName ,MasterDevice,*p);
+ if ((i = open(MasterName,O_RDWR,0)) >= 0) {
+ *master = i;
+ sprintf(SlaveName ,SlaveDevice,*p);
+ if ((j = open(SlaveName,O_RDWR,0)) >= 0) {
+ *slave = j;
+ chown(SlaveName, getuid(), getgid());
+ chmod(SlaveName, 0622);
+ return;
+ }
+ close(i);
+ }
+ }
+ rb_raise(rb_eRuntimeError, "Cannot get %s\n", SlaveDevice);
+#endif
+}
+#endif /* HAVE__GETPTY */
+#endif /* HAVE_OPENPTY */
+
+static void
+freeDevice()
+{
+ chmod(SlaveName, 0666);
+ chown(SlaveName, 0, 0);
+}
+
+/* ruby function: getpty */
+static VALUE
+pty_getpty(self, shell)
+ VALUE self, shell;
+{
+ VALUE res;
+ struct pty_info info;
+ OpenFile *wfptr,*rfptr;
+ NEWOBJ(rport, struct RFile);
+ NEWOBJ(wport, struct RFile);
+
+ if (n_pty == MAX_PTY+1) {
+ rb_raise(rb_eRuntimeError, "Too many ptys are open");
+ }
+
+ OBJSETUP(rport, rb_cFile, T_FILE);
+ MakeOpenFile(rport, rfptr);
+
+ OBJSETUP(wport, rb_cFile, T_FILE);
+ MakeOpenFile(wport, wfptr);
+
+ establishShell(RSTRING(shell)->ptr,&info);
+
+ rfptr->mode = rb_io_mode_flags("r");
+ rfptr->f = fdopen(info.fd, "r");
+ rfptr->path = strdup(RSTRING(shell)->ptr);
+ rb_obj_call_init((VALUE)rport, 1, &shell);
+
+ wfptr->mode = rb_io_mode_flags("w");
+ wfptr->f = fdopen(dup(info.fd), "w");
+ wfptr->path = strdup(RSTRING(shell)->ptr);
+ rb_obj_call_init((VALUE)wport, 1, &shell);
+
+ res = rb_ary_new2(2);
+ rb_ary_store(res,0,(VALUE)rport);
+ rb_ary_store(res,1,(VALUE)wport);
+ rb_ary_store(res,2,INT2FIX(info.child_pid));
+
+ if (rb_iterator_p()) {
+ rb_yield((VALUE)res);
+ reset_signal_action();
+ return Qnil;
+ }
+ else {
+ return (VALUE)res;
+ }
+}
+
+/* ruby function: protect_signal */
+static VALUE
+pty_protect(self)
+ VALUE self;
+{
+ reset_signal_action();
+ rb_yield(Qnil);
+ set_signal_action(chld_changed);
+ return self;
+}
+
+static VALUE
+pty_reset_signal(self)
+ VALUE self;
+{
+ reset_signal_action();
+ return self;
+}
+
+static VALUE cPTY;
+
+void
+Init_pty()
+{
+ cPTY = rb_define_module("PTY");
+ rb_define_module_function(cPTY,"getpty",pty_getpty,1);
+ rb_define_module_function(cPTY,"spawn",pty_getpty,1);
+ rb_define_module_function(cPTY,"protect_signal",pty_protect,0);
+ rb_define_module_function(cPTY,"reset_signal",pty_reset_signal,0);
+}