+static char *sccsid = "@(#)script.c 4.1 (Berkeley) %G%";
+ /*
+ * script - makes copy of terminal conversation. usage:
+ *
+ * script [ -n ] [ -s ] [ -q ] [ -a ] [ -S shell ] [ file ]
+ * conversation saved in file. default is DFNAME
+ */
+
+#define DFNAME "typescript"
+
+#ifdef HOUXP
+#define STDSHELL "/bin/sh"
+#define NEWSHELL "/p4/3723mrh/bin/csh"
+char *shell = NEWSHELL;
+#endif
+
+#ifdef HOUXT
+#define STDSHELL "/bin/sh"
+#define NEWSHELL "/t1/bruce/ucb/bin/csh"
+char *shell = NEWSHELL;
+#endif
+
+#ifdef CORY
+#define STDSHELL "/bin/sh"
+#define NEWSHELL "/bin/csh"
+char *shell = NEWSHELL;
+#endif
+
+#ifdef CC
+#define STDSHELL "/bin/sh"
+#define NEWSHELL "/bin/csh"
+char *shell = NEWSHELL;
+#endif
+
+#ifndef STDSHELL
+# define V7ENV
+#endif
+
+#ifdef V7ENV
+#include <signal.h>
+/* used for version 7 with environments - gets your environment shell */
+#define STDSHELL "/bin/sh"
+#define NEWSHELL "/bin/csh"
+char *shell; /* initialized in the code */
+# include <sys/types.h>
+# include <sys/stat.h>
+# define MODE st_mode
+# define STAT stat
+char *getenv();
+
+#else
+
+/*
+ * The following is the structure of the block returned by
+ * the stat and fstat system calls.
+ */
+
+struct inode {
+ char i_minor; /* +0: minor device of i-node */
+ char i_major; /* +1: major device */
+ int i_number; /* +2 */
+ int i_flags; /* +4: see below */
+ char i_nlinks; /* +6: number of links to file */
+ char i_uid; /* +7: user ID of owner */
+ char i_gid; /* +8: group ID of owner */
+ char i_size0; /* +9: high byte of 24-bit size */
+ int i_size1; /* +10: low word of 24-bit size */
+ int i_addr[8]; /* +12: block numbers or device number */
+ int i_actime[2]; /* +28: time of last access */
+ int i_modtime[2]; /* +32: time of last modification */
+};
+
+#define IALLOC 0100000
+#define IFMT 060000
+#define IFDIR 040000
+#define IFCHR 020000
+#define IFBLK 060000
+#define MODE i_flags
+#define STAT inode
+#endif
+
+char *tty; /* name of users tty so can turn off writes */
+char *ttyname(); /* std subroutine */
+int mode = 0622; /* old permission bits for users tty */
+int outpipe[2]; /* pipe from shell to output */
+int fd; /* file descriptor of typescript file */
+int inpipe[2]; /* pipe from input to shell */
+long tvec; /* current time */
+char buffer[256]; /* for block I/O's */
+int n; /* number of chars read */
+int status; /* dummy for wait sys call */
+char *fname; /* name of typescript file */
+int forkval, ttn; /* temps for error checking */
+int qflg; /* true if -q (quiet) flag */
+int aflg; /* true if -q (append) flag */
+struct STAT sbuf;
+int flsh();
+
+main(argc,argv) int argc; char **argv; {
+
+ if ((tty = ttyname(2)) < 0) {
+ printf("Nested script not allowed.\n");
+ fail();
+ }
+
+#ifdef V7ENV
+ shell = getenv("SHELL");
+#endif
+
+ while ( argc > 1 && argv[1][0] == '-') {
+ switch(argv[1][1]) {
+ case 'n':
+ shell = NEWSHELL;
+ break;
+ case 's':
+ shell = STDSHELL;
+ break;
+ case 'S':
+ shell = argv[2];
+ argc--; argv++;
+ break;
+ case 'q':
+ qflg++;
+ break;
+ case 'a':
+ aflg++;
+ break;
+ default:
+ printf("Bad flag %s - ignored\n",argv[1]);
+ }
+ argc--; argv++;
+ }
+
+ if (argc > 1) {
+ fname = argv[1];
+ if (!aflg && stat(fname,&sbuf) >= 0) {
+ printf("File %s already exists.\n",fname);
+ done();
+ }
+ } else fname = DFNAME;
+ if (!aflg) {
+ fd = creat(fname,0); /* so can't cat/lpr typescript from inside */
+ } else {
+ /* try to append to existing file first */
+ fd = open(fname,1);
+ if (fd >= 0) lseek(fd,0l,2);
+ else fd = creat(fname,0);
+ }
+ if (fd<0) {
+ printf("Can't create %s\n",fname);
+ if (unlink(fname)==0) {
+ printf("because of previous typescript bomb - try again\n");
+ }
+ fail();
+ }
+
+ chmod(fname,0); /* in case it already exists */
+ fixtty();
+ if (!qflg) {
+ printf("Script started, file is %s\n",fname);
+ check(write(fd,"Script started on ",18));
+ time(&tvec);
+ check(write(fd,ctime(&tvec),25));
+ }
+ pipe(inpipe);
+ pipe(outpipe);
+
+ forkval = fork();
+ if (forkval < 0)
+ goto ffail;
+ if (forkval == 0) {
+ forkval = fork();
+ if (forkval < 0)
+ goto ffail;
+ if (forkval == 0)
+ dooutput();
+ forkval = fork();
+ if (forkval < 0)
+ goto ffail;
+ if (forkval == 0)
+ doinput();
+ doshell();
+ }
+ close(inpipe[0]); close(inpipe[1]);
+ close(outpipe[0]); close(outpipe[1]);
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, done);
+ wait(&status);
+ done();
+ /*NOTREACHED*/
+
+ffail:
+ printf("Fork failed. Try again.\n");
+ fail();
+}
+
+/* input process - copy tty to pipe and file */
+doinput()
+{
+
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGTSTP, SIG_IGN);
+
+ close(inpipe[0]);
+ close(outpipe[0]);
+ close(outpipe[1]);
+
+ /* main input loop - copy until end of file (ctrl D) */
+ while ((n=read(0,buffer,256)) > 0) {
+ check(write(fd,buffer,n));
+ write(inpipe[1],buffer,n);
+ }
+
+ /* end of script - close files and exit */
+ close(inpipe[1]);
+ close(fd);
+ done();
+}
+
+/* do output process - copy to tty & file */
+dooutput()
+{
+
+ signal(SIGINT, flsh);
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGTSTP, SIG_IGN);
+ close(0);
+ close(inpipe[0]);
+ close(inpipe[1]);
+ close(outpipe[1]);
+
+ /* main output proc loop */
+ while (n=read(outpipe[0],buffer,256)) {
+ if (n > 0) { /* -1 means trap to flsh just happened */
+ write(1,buffer,n);
+ check(write(fd,buffer,n));
+ }
+ }
+
+ /* output sees eof - close files and exit */
+ if (!qflg) {
+ printf("Script done, file is %s\n",fname);
+ check(write(fd,"\nscript done on ",16));
+ time(&tvec);
+ check(write(fd,ctime(&tvec),25));
+ }
+ close(fd);
+ exit(0);
+}
+
+/* exec shell, after diverting std input & output */
+doshell()
+{
+
+ close(0);
+ dup(inpipe[0]);
+ close(1);
+ dup(outpipe[1]);
+ close(2);
+ dup(outpipe[1]);
+
+ /* close useless files */
+ close(inpipe[0]);
+ close(inpipe[1]);
+ close(outpipe[0]);
+ close(outpipe[1]);
+ execl(shell, "sh", "-i", 0);
+ execl(STDSHELL, "sh", "-i", 0);
+ execl(NEWSHELL, "sh", "-i", 0);
+ printf("Can't execute shell\n");
+ fail();
+}
+
+fixtty()
+{
+
+ fstat(2, &sbuf);
+ mode = sbuf.MODE&0777;
+ chmod(tty, 0600);
+}
+
+/* come here on rubout to flush output - this doesn't work */
+flsh()
+{
+
+ signal(SIGINT, flsh);
+ /* lseek(outpipe[0],0l,2); /* seeks on pipes don't work !"$"$!! */
+}
+
+fail()
+{
+
+ unlink(fname);
+ kill(0, 15); /* shut off other script processes */
+ done();
+}
+
+done()
+{
+
+ chmod(tty, mode);
+ chmod(fname, 0664);
+ exit();
+}
+
+#ifndef V7ENV
+#ifndef CC
+char *ttyname(i) int i; {
+ char *string;
+ string = "/dev/ttyx";
+ string[8] = ttyn(fd);
+ if (string[8] == 'x') return((char *) (-1));
+ else return(string);
+}
+#endif
+#endif
+
+check(n)
+int n;
+{
+ /* checks the result of a write call, if neg
+ assume ran out of disk space & die */
+ if (n < 0) {
+ write(1,"Disk quota exceeded - script quits\n",35);
+ kill(0,15);
+ done();
+ }
+}
projects / unix-history / commitdiff