cf3e39de84768ee3e1b1d2fe5fcaa15c4d8e2e2d
2 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
3 * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
4 * Micah Cowan (micah@cowan.name)
5 * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
6 * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
7 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
8 * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
9 * Copyright (c) 1987 Oliver Laumann
12 * Authors: Hadi Bargi Rangin bargi@dots.physics.orst.edu
13 * Bill Barry barryb@dots.physics.orst.edu
14 * Randy Lundquist randyl@dots.physics.orst.edu
16 * Modifications Copyright (c) 1995 by
17 * Science Access Project, Oregon State University.
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 3, or (at your option)
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program (see the file COPYING); if not, see
32 * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
33 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
35 ****************************************************************
38 #include <sys/types.h>
44 # include <sys/sysmacros.h>
49 # include <sys/ioctl.h>
59 # include <sys/stropts.h>
62 #if defined(SYSV) && !defined(ISC)
63 # include <sys/utsname.h>
66 #if defined(sequent) || defined(SVR4)
67 # include <sys/resource.h>
68 #endif /* sequent || SVR4 */
72 # include <sys/sioctl.h>
76 #if (defined(AUX) || defined(_AUX_SOURCE)) && defined(POSIX)
79 #if defined(USE_LOCALE) || defined(ENCODINGS)
82 #if defined(HAVE_NL_LANGINFO) && defined(ENCODINGS)
83 # include <langinfo.h>
91 #include "patchlevel.h"
94 * At the moment we only need the real password if the
95 * builtin lock is used. Therefore disable SHADOWPW if
96 * we do not really need it (kind of security thing).
105 #endif /* SHADOWPW */
107 #include "logfile.h" /* islogfile, logfflush */
114 extern char Term
[], screenterm
[], **environ
, Termcap
[];
116 int VBellWait
, MsgWait
, MsgMinWait
, SilenceWait
;
118 extern struct acluser
*users
;
119 extern struct display
*displays
, *display
;
122 extern int visual_bell
;
124 extern unsigned char mark_key_tab
[];
126 extern char version
[];
127 extern char DefaultShell
[];
129 extern char *zmodem_sendcmd
;
130 extern char *zmodem_recvcmd
;
132 extern struct layout
*layout_last
;
138 extern struct NewWindow nwin_undef
, nwin_default
, nwin_options
;
141 static struct passwd
*getpwbyname
__P((char *, struct passwd
*));
142 static void SigChldHandler
__P((void));
143 static sigret_t SigChld
__P(SIGPROTOARG
);
144 static sigret_t SigInt
__P(SIGPROTOARG
);
145 static sigret_t CoreDump
__P(SIGPROTOARG
);
146 static sigret_t FinitHandler
__P(SIGPROTOARG
);
147 static void DoWait
__P((void));
148 static void serv_read_fn
__P((struct event
*, char *));
149 static void serv_select_fn
__P((struct event
*, char *));
150 static void logflush_fn
__P((struct event
*, char *));
151 static void backtick_filter
__P((struct backtick
*));
152 static void backtick_fn
__P((struct event
*, char *));
153 static char *runbacktick
__P((struct backtick
*, int *, time_t));
154 static int IsSymbol
__P((char *, char *));
155 static char *ParseChar
__P((char *, char *));
156 static int ParseEscape
__P((char *));
157 static char *pad_expand
__P((char *, char *, int, int));
159 static void fds
__P((void));
162 int nversion
; /* numerical version, used for secondary DA */
170 struct mode attach_Mode
;
172 char SockPath
[MAXPATHLEN
+ 2 * MAXSTR
];
173 char *SockName
; /* SockName is pointer in SockPath */
174 char *SockMatch
= NULL
; /* session id command line argument */
175 int ServerSocket
= -1;
176 struct event serv_read
;
177 struct event serv_select
;
178 struct event logflushev
;
180 char **NewEnv
= NULL
;
182 char *RcFileName
= NULL
;
185 char *screenlogfile
; /* filename layout */
186 int log_flush
= 10; /* flush interval in seconds */
187 int logtstamp_on
= 0; /* tstamp disabled */
188 char *logtstamp_string
; /* stamp layout */
189 int logtstamp_after
= 120; /* first tstamp after 120s */
190 char *hardcopydir
= NULL
;
192 char *VisualBellString
;
193 char *ActivityString
;
198 char *PowDetachString
;
206 int iflag
, rflag
, dflag
, lsflag
, quietflag
, wipeflag
, xflag
;
217 int tty_oldmode
= -1;
220 char HostName
[MAXSTR
];
221 int MasterPid
, PanicPid
;
222 int real_uid
, real_gid
, eff_uid
, eff_gid
;
224 int ZombieKey_destroy
, ZombieKey_resurrect
, ZombieKey_onerror
;
225 char *preselect
= NULL
; /* only used in Attach() */
228 char *screenencodings
;
241 struct layer
*flayer
;
244 struct win
*console_window
;
253 char strnomem
[] = "Out of memory.";
256 static int InterruptPlease
;
257 static int GotSigChld
;
260 lf_secreopen(name
, wantfd
, l
)
268 if (((got_fd
= secopen(name
, O_WRONLY
| O_CREAT
| O_APPEND
, 0666)) < 0) ||
269 lf_move_fd(got_fd
, wantfd
) < 0)
272 debug1("lf_secreopen: failed for %s\n", name
);
275 l
->st
->st_ino
= l
->st
->st_dev
= 0;
276 debug2("lf_secreopen: %d = %s\n", wantfd
, name
);
280 /********************************************************************/
281 /********************************************************************/
282 /********************************************************************/
285 static struct passwd
*
286 getpwbyname(name
, ppp
)
292 struct spwd
*sss
= NULL
;
293 static char *spw
= NULL
;
296 if (!ppp
&& !(ppp
= getpwnam(name
)))
299 /* Do password sanity check..., allow ##user for SUN_C2 security */
304 if (ppp
->pw_passwd
[0] == '#' && ppp
->pw_passwd
[1] == '#' &&
305 strcmp(ppp
->pw_passwd
+ 2, ppp
->pw_name
) == 0)
309 char c
= ppp
->pw_passwd
[n
];
310 if (!(c
== '.' || c
== '/' || c
== '$' ||
311 (c
>= '0' && c
<= '9') ||
312 (c
>= 'a' && c
<= 'z') ||
313 (c
>= 'A' && c
<= 'Z')))
318 /* try to determine real password */
319 if (n
< 13 && sss
== 0)
321 sss
= getspnam(ppp
->pw_name
);
326 ppp
->pw_passwd
= spw
= SaveStr(sss
->sp_pwdp
);
327 endspent(); /* this should delete all buffers ... */
330 endspent(); /* this should delete all buffers ... */
336 if (ppp
->pw_passwd
&& strlen(ppp
->pw_passwd
) == 13 + 11)
337 ppp
->pw_passwd
[13] = 0; /* beware of linux's long passwords */
350 s
= getenv("LC_ALL");
352 s
= getenv("LC_CTYPE");
367 char socknamebuf
[2 * MAXSTR
];
369 char *myname
= (ac
== 0) ? "screen" : av
[0];
372 #ifdef _MODE_T /* (jw) */
377 #if defined(SYSV) && !defined(ISC)
378 struct utsname utsnam
;
380 struct NewWindow nwin
;
381 int detached
= 0; /* start up detached */
387 #if (defined(AUX) || defined(_AUX_SOURCE)) && defined(POSIX)
388 setcompat(COMPAT_POSIX
|COMPAT_BSDPROT
); /* turn on seteuid support */
390 #if defined(sun) && defined(SVR4)
392 /* Solaris' login blocks SIGHUP! This is _very bad_ */
395 sigprocmask(SIG_SETMASK
, &sset
, 0);
400 * First, close all unused descriptors
401 * (otherwise, we might have problems with the select() call)
407 snprintf(version
, 59, "%d.%.2d.%.2d%s (%s%s) %s", REV
, VERS
,
408 PATCHLEVEL
, STATE
, ORIGIN
, GIT_REV
, DATE
);
409 nversion
= REV
* 10000 + VERS
* 100 + PATCHLEVEL
;
410 debug2("-- screen debug started %s (%s)\n", *av
, version
);
424 debug("NAMEDPIPE\n");
426 #if defined(SIGWINCH) && defined(TIOCGWINSZ)
427 debug("Window size changing enabled\n");
457 debug1("NAME_MAX = %d\n", NAME_MAX
);
460 BellString
= SaveStr("Bell in window %n");
461 VisualBellString
= SaveStr(" Wuff, Wuff!! ");
462 ActivityString
= SaveStr("Activity in window %n");
463 screenlogfile
= SaveStr("screenlog.%n");
464 logtstamp_string
= SaveStr("-- %n:%t -- time-stamp -- %M/%d/%y %c:%s --\n");
465 hstatusstring
= SaveStr("%h");
466 captionstring
= SaveStr("%3n %t");
467 timestring
= SaveStr("%c:%s %M %d %H%? %l%?");
468 wlisttit
= SaveStr("Num Name%=Flags");
469 wliststr
= SaveStr("%3n %t%=%f");
471 BufferFile
= SaveStr(DEFAULT_BUFFERFILE
);
477 default_startup
= (ac
> 1) ? 0 : 1;
479 VBellWait
= VBELLWAIT
* 1000;
480 MsgWait
= MSGWAIT
* 1000;
481 MsgMinWait
= MSGMINWAIT
* 1000;
482 SilenceWait
= SILENCEWAIT
;
487 zmodem_sendcmd
= SaveStr("!!! sz -vv -b ");
488 zmodem_recvcmd
= SaveStr("!!! rz -vv -b -E");
492 CompileKeys((char *)0, 0, mark_key_tab
);
496 screenencodings
= SaveStr(SCREENENCODINGS
);
502 nwin_options
= nwin_undef
;
503 strcpy(screenterm
, "screen");
505 logreopen_register(lf_secreopen
);
508 /* if this is a login screen, assume -RR */
517 ShellProg
= SaveStr(DefaultShell
); /* to prevent nasty circles */
522 if (--ac
> 0 && *ap
== '-')
524 if (ap
[1] == '-' && ap
[2] == 0)
530 if (ap
[1] == '-' && !strcmp(ap
, "--version"))
531 Panic(0, "Screen version %s", version
);
532 if (ap
[1] == '-' && !strcmp(ap
, "--help"))
533 exit_with_usage(myname
, NULL
, NULL
);
534 while (ap
&& *ap
&& *++ap
)
539 nwin_options
.aflag
= 1;
544 case 'p': /* preselect */
550 exit_with_usage(myname
, "Specify a window to preselect with -p", NULL
);
557 bd
.bd_start_braille
= 1;
566 exit_with_usage(myname
, "Specify an alternate rc-filename with -c", NULL
);
575 exit_with_usage(myname
, "Specify command characters with -e", NULL
);
579 Panic(0, "Two characters are required with -e option, not '%s'.", ap
);
588 nwin_options
.flowflag
= FLOW_NOW
* 0;
595 nwin_options
.flowflag
= FLOW_NOW
* 1;
598 nwin_options
.flowflag
= FLOW_AUTOFLAG
;
601 exit_with_usage(myname
, "Unknown flow option -%s", --ap
);
606 exit_with_usage(myname
, NULL
, NULL
);
607 nwin_options
.histheight
= atoi(*++av
);
608 if (nwin_options
.histheight
< 0)
609 exit_with_usage(myname
, "-h: %s: negative scrollback size?", *av
);
614 case 't': /* title, the former AkA == -k */
616 exit_with_usage(myname
, "Specify a new window-name with -t", NULL
);
617 nwin_options
.aka
= *++av
;
625 nwin_options
.lflag
= 0;
632 nwin_options
.lflag
= 1;
635 nwin_options
.lflag
= 3;
638 case 'i': /* -list */
640 if (ac
> 1 && !SockMatch
)
648 exit_with_usage(myname
, "%s: Unknown suboption to -l", --ap
);
654 if (ac
> 1 && !SockMatch
)
661 nwin_options
.Lflag
= 1;
666 case 'O': /* to be (or not to be?) deleted. jw. */
671 exit_with_usage(myname
, "Specify terminal-type with -T", NULL
);
672 if (strlen(*++av
) < 20)
673 strcpy(screenterm
, *av
);
675 Panic(0, "-T: terminal name too long. (max. 20 char)");
676 nwin_options
.term
= screenterm
;
686 if (ac
> 1 && *av
[1] != '-' && !SockMatch
)
690 debug2("rflag=%d, SockMatch=%s\n", dflag
, SockMatch
);
698 rflag
+= (*ap
== 'R') ? 2 : 1;
709 if (*av
[1] != '-' && !SockMatch
)
713 debug2("dflag=%d, SockMatch=%s\n", dflag
, SockMatch
);
720 exit_with_usage(myname
, "Specify shell with -s", NULL
);
723 ShellProg
= SaveStr(*++av
);
724 debug1("ShellProg: '%s'\n", ShellProg
);
730 exit_with_usage(myname
, "Specify session-name with -S", NULL
);
734 exit_with_usage(myname
, "Empty session-name?", NULL
);
740 Panic(0, "Screen version %s", version
);
744 nwin_options
.encoding
= nwin_options
.encoding
== -1 ? UTF8
: 0;
748 exit_with_usage(myname
, "Unknown option %s", --ap
);
760 if (eff_uid
!= real_uid
)
762 /* if running with s-bit, we must install a special signal
763 * handler routine that resets the s-bit, so that we get a
766 #ifdef SIGBUS /* OOPS, linux has no bus errors! */
767 signal(SIGBUS
, CoreDump
);
769 signal(SIGSEGV
, CoreDump
);
773 setlocale(LC_ALL
, "");
776 if (nwin_options
.encoding
== -1)
778 /* ask locale if we should start in UTF-8 mode */
779 # ifdef HAVE_NL_LANGINFO
781 setlocale(LC_CTYPE
, "");
783 nwin_options
.encoding
= FindEncoding(nl_langinfo(CODESET
));
784 debug1("locale says encoding = %d\n", nwin_options
.encoding
);
788 if ((s
= locale_name()) && InStr(s
, "UTF-8"))
789 nwin_options
.encoding
= UTF8
;
791 debug1("environment says encoding=%d\n", nwin_options
.encoding
);
797 if ((s
= locale_name()))
799 if(!strncmp(s
, "zh_", 3) || !strncmp(s
, "ja_", 3) || !strncmp(s
, "ko_", 3))
807 if (nwin_options
.aka
)
810 if (nwin_options
.encoding
> 0)
812 size_t len
= strlen(nwin_options
.aka
);
814 char *newbuf
= malloc(3 * len
);
817 newsz
= RecodeBuf(nwin_options
.aka
, len
,
818 nwin_options
.encoding
, 0, newbuf
);
819 newbuf
[newsz
] = '\0';
820 nwin_options
.aka
= newbuf
;
825 /* If we just use the original value from av,
826 subsequent shelltitle invocations will attempt to free
827 space we don't own... */
828 nwin_options
.aka
= SaveStr(nwin_options
.aka
);
832 if (SockMatch
&& strlen(SockMatch
) >= MAXSTR
)
833 Panic(0, "Ridiculously long socketname - try again.");
834 if (cmdflag
&& !rflag
&& !dflag
&& !xflag
)
836 if (!cmdflag
&& dflag
&& mflag
&& !(rflag
|| xflag
))
840 nwin
.encoding
= nwin_undef
.encoding
; /* let screenrc overwrite it */
845 /* make the write() calls return -1 on all errors */
848 * Ronald F. Guilmette, Oct 29 '94, bug-gnu-utils@prep.ai.mit.edu:
849 * It appears that in System V Release 4, UNIX, if you are writing
850 * an output file and you exceed the currently set file size limit,
851 * you _don't_ just get the call to `write' returning with a
852 * failure code. Rather, you get a signal called `SIGXFSZ' which,
853 * if neither handled nor ignored, will cause your program to crash
856 signal(SIGXFSZ
, SIG_IGN
);
860 signal(SIGPIPE
, SIG_IGN
);
867 sh
= getenv("SHELL");
868 ShellProg
= SaveStr(sh
? sh
: DefaultShell
);
870 ShellArgs
[0] = ShellProg
;
871 home
= getenv("HOME");
872 if (!mflag
&& !SockMatch
)
875 if (sty
&& *sty
== 0)
880 if (!(nethackflag
= (getenv("NETHACKOPTIONS") != NULL
)))
882 char nethackrc
[MAXPATHLEN
];
884 if (home
&& (strlen(home
) < (MAXPATHLEN
- 20)))
886 sprintf(nethackrc
,"%s/.nethackrc", home
);
887 nethackflag
= !access(nethackrc
, F_OK
);
893 own_uid
= multi_uid
= real_uid
;
894 if (SockMatch
&& (sockp
= index(SockMatch
, '/')))
898 SockMatch
= sockp
+ 1;
902 if ((mppp
= getpwnam(multi
)) == (struct passwd
*)0)
903 Panic(0, "Cannot identify account '%s'.", multi
);
904 multi_uid
= mppp
->pw_uid
;
905 multi_home
= SaveStr(mppp
->pw_dir
);
906 if (strlen(multi_home
) > MAXPATHLEN
- 10)
907 Panic(0, "home directory path too long");
909 /* always fake multi attach mode */
916 /* Special case: effective user is multiuser. */
917 if (eff_uid
&& (multi_uid
!= eff_uid
))
918 Panic(0, "Must run suid root for multiuser support.");
920 if (SockMatch
&& *SockMatch
== 0)
922 #endif /* MULTIUSER */
924 if ((LoginName
= getlogin()) && LoginName
[0] != '\0')
926 if ((ppp
= getpwnam(LoginName
)) != (struct passwd
*) 0)
927 if ((int)ppp
->pw_uid
!= real_uid
)
928 ppp
= (struct passwd
*) 0;
932 if ((ppp
= getpwuid(real_uid
)) == 0)
934 Panic(0, "getpwuid() can't identify your account!");
937 LoginName
= ppp
->pw_name
;
939 LoginName
= SaveStr(LoginName
);
941 ppp
= getpwbyname(LoginName
, ppp
);
943 #if !defined(SOCKDIR) && defined(MULTIUSER)
944 if (multi
&& !multiattach
)
946 if (home
&& strcmp(home
, ppp
->pw_dir
))
947 Panic(0, "$HOME must match passwd entry for multiuser screens.");
951 #define SET_GUID() do \
955 eff_uid = real_uid; \
956 eff_gid = real_gid; \
959 #define SET_TTYNAME(fatal) do \
961 if (!(attach_tty = ttyname(0))) \
964 Panic(0, "Must be connected to a terminal."); \
968 else if (stat(attach_tty, &st)) \
969 Panic(errno, "Cannot access '%s'", attach_tty); \
970 if (strlen(attach_tty) >= MAXPATHLEN) \
971 Panic(0, "TtyName too long - sorry."); \
974 if (home
== 0 || *home
== '\0')
976 if (strlen(LoginName
) > 20)
977 Panic(0, "LoginName too long - sorry.");
979 if (multi
&& strlen(multi
) > 20)
980 Panic(0, "Screen owner name too long - sorry.");
982 if (strlen(home
) > MAXPATHLEN
- 25)
983 Panic(0, "$HOME too long - sorry.");
986 if (!detached
&& !lsflag
&& !cmdflag
&& !(dflag
&& !mflag
&& !rflag
&& !xflag
) && !(!mflag
&& !SockMatch
&& sty
&& !xflag
))
992 /* ttyname implies isatty */
995 tty_mode
= (int)st
.st_mode
& 0777;
999 fl
= fcntl(0, F_GETFL
, 0);
1000 if (fl
!= -1 && (fl
& (O_RDWR
|O_RDONLY
|O_WRONLY
)) == O_RDWR
)
1003 if (attach_fd
== -1)
1005 if ((n
= secopen(attach_tty
, O_RDWR
| O_NONBLOCK
, 0)) < 0)
1006 Panic(0, "Cannot open your terminal '%s' - please check.", attach_tty
);
1009 debug2("attach_tty is %s, attach_fd is %d\n", attach_tty
, attach_fd
);
1011 if ((attach_term
= getenv("TERM")) == 0 || *attach_term
== 0)
1012 Panic(0, "Please set a terminal type.");
1013 if (strlen(attach_term
) > sizeof(D_termname
) - 1)
1014 Panic(0, "$TERM too long - sorry.");
1015 GetTTY(0, &attach_Mode
);
1016 #ifdef DEBUGGGGGGGGGGGGGGG
1017 DebugTTY(&attach_Mode
);
1022 oumask
= umask(0); /* well, unsigned never fails? jw. */
1024 if ((oumask
= (int)umask(0)) == -1)
1025 Panic(errno
, "Cannot change umask to zero");
1027 SockDir
= getenv("SCREENDIR");
1030 if (strlen(SockDir
) >= MAXPATHLEN
- 1)
1031 Panic(0, "Ridiculously long $SCREENDIR - try again.");
1034 Panic(0, "No $SCREENDIR with multi screens, please.");
1041 sprintf(SockPath
, "%s/.screen", multi_home
);
1045 sprintf(SockPath
, "%s/S-%s", SockDir
, multi
);
1054 sprintf(SockPath
, "%s/.screen", home
);
1060 if (access(SockDir
, F_OK
))
1062 debug1("SockDir '%s' missing ...\n", SockDir
);
1063 if (UserContext() > 0)
1065 if (mkdir(SockDir
, 0700))
1069 if (UserStatus() <= 0)
1070 Panic(0, "Cannot make directory '%s'.", SockDir
);
1072 if (SockDir
!= SockPath
)
1073 strcpy(SockPath
, SockDir
);
1079 if (lstat(SockDir
, &st
))
1081 n
= (eff_uid
== 0 && (real_uid
|| eff_gid
== real_gid
)) ? 0755 :
1082 (eff_gid
!= real_gid
) ? 0775 :
1088 if (mkdir(SockDir
, n
) == -1)
1089 Panic(errno
, "Cannot make directory '%s'", SockDir
);
1093 if (!S_ISDIR(st
.st_mode
))
1094 Panic(0, "'%s' must be a directory.", SockDir
);
1095 if (eff_uid
== 0 && real_uid
&& (int)st
.st_uid
!= eff_uid
)
1096 Panic(0, "Directory '%s' must be owned by root.", SockDir
);
1097 n
= (eff_uid
== 0 && (real_uid
|| (st
.st_mode
& 0775) != 0775)) ? 0755 :
1098 (eff_gid
== (int)st
.st_gid
&& eff_gid
!= real_gid
) ? 0775 :
1100 if (((int)st
.st_mode
& 0777) != n
)
1101 Panic(0, "Directory '%s' must have mode %03o.", SockDir
, n
);
1103 sprintf(SockPath
, "%s/S-%s", SockDir
, LoginName
);
1104 if (access(SockPath
, F_OK
))
1106 if (mkdir(SockPath
, 0700) == -1)
1107 Panic(errno
, "Cannot make directory '%s'", SockPath
);
1108 (void) chown(SockPath
, real_uid
, real_gid
);
1114 if (stat(SockPath
, &st
) == -1)
1115 Panic(errno
, "Cannot access %s", SockPath
);
1117 if (!S_ISDIR(st
.st_mode
))
1118 Panic(0, "%s is not a directory.", SockPath
);
1122 if ((int)st
.st_uid
!= multi_uid
)
1123 Panic(0, "%s is not the owner of %s.", multi
, SockPath
);
1128 if ((int)st
.st_uid
!= real_uid
)
1129 Panic(0, "You are not the owner of %s.", SockPath
);
1131 if ((st
.st_mode
& 0777) != 0700)
1132 Panic(0, "Directory %s must have mode 700.", SockPath
);
1133 if (SockMatch
&& index(SockMatch
, '/'))
1134 Panic(0, "Bad session name '%s'", SockMatch
);
1135 SockName
= SockPath
+ strlen(SockPath
) + 1;
1137 (void) umask(oumask
);
1138 debug2("SockPath: %s SockMatch: %s\n", SockPath
, SockMatch
? SockMatch
: "NULL");
1140 #if defined(SYSV) && !defined(ISC)
1141 if (uname(&utsnam
) == -1)
1142 Panic(errno
, "uname");
1143 strncpy(HostName
, utsnam
.nodename
, sizeof(utsnam
.nodename
) < MAXSTR
? sizeof(utsnam
.nodename
) : MAXSTR
- 1);
1144 HostName
[sizeof(utsnam
.nodename
) < MAXSTR
? sizeof(utsnam
.nodename
) : MAXSTR
- 1] = '\0';
1146 (void) gethostname(HostName
, MAXSTR
);
1147 HostName
[MAXSTR
- 1] = '\0';
1149 if ((ap
= index(HostName
, '.')) != NULL
)
1158 real_uid
= multi_uid
;
1161 i
= FindSocket((int *)NULL
, &fo
, &oth
, SockMatch
);
1163 exit(8 + (fo
? ((oth
|| i
) ? 2 : 1) : 0) + i
);
1165 Panic(0, "No Sockets found in %s.\n", SockPath
);
1166 Panic(0, "%d Socket%s in %s.\n", fo
, fo
> 1 ? "s" : "", SockPath
);
1169 signal(SIG_BYE
, AttacherFinit
); /* prevent races */
1172 /* attach_tty is not mandatory */
1175 Panic(0, "Please specify a command.");
1177 SendCmdMessage(sty
, SockMatch
, av
);
1180 else if (rflag
|| xflag
)
1182 debug("screen -r: - is there anybody out there?\n");
1183 if (Attach(MSG_ATTACH
))
1190 Panic(0, "Can't create sessions of other users.");
1192 debug("screen -r: backend not responding -- still crying\n");
1194 else if (dflag
&& !mflag
)
1198 Msg(0, "[%s %sdetached.]\n", SockName
, (dflag
> 1 ? "power " : ""));
1202 if (!SockMatch
&& !mflag
&& sty
)
1204 /* attach_tty is not mandatory */
1207 nwin_options
.args
= av
;
1208 SendCreateMsg(sty
, &nwin
);
1212 nwin_compose(&nwin_default
, &nwin_options
, &nwin_default
);
1214 if (!detached
|| dflag
!= 2)
1222 Panic(errno
, "fork");
1230 sprintf(socknamebuf
, "%d.%s", MasterPid
, SockMatch
);
1232 sprintf(socknamebuf
, "%d.%s.%s", MasterPid
, stripdev(attach_tty
), HostName
);
1233 for (ap
= socknamebuf
; *ap
; ap
++)
1237 if (strlen(socknamebuf
) > NAME_MAX
)
1238 socknamebuf
[NAME_MAX
] = 0;
1240 sprintf(SockPath
+ strlen(SockPath
), "/%s", socknamebuf
);
1247 PanicPid
= getppid();
1249 if (DefaultEsc
== -1)
1250 DefaultEsc
= Ctrl('a');
1251 if (DefaultMetaEsc
== -1)
1252 DefaultMetaEsc
= 'a';
1254 ap
= av0
+ strlen(av0
) - 1;
1257 if (!strncmp("screen", ap
, 6))
1259 strncpy(ap
, "SCREEN", 6); /* name this process "SCREEN-BACKEND" */
1271 if (dfp
&& dfp
!= stderr
)
1273 sprintf(buf
, "%s/SCREEN.%d", DEBUGDIR
, (int)getpid());
1274 if ((dfp
= fopen(buf
, "w")) == NULL
)
1277 (void) chmod(buf
, 0666);
1282 if (attach_fd
== -1)
1284 if ((n
= secopen(attach_tty
, O_RDWR
, 0)) < 0)
1285 Panic(0, "Cannot reopen '%s' - please check.", attach_tty
);
1292 freopen("/dev/null", "r", stdin
);
1293 freopen("/dev/null", "w", stdout
);
1298 freopen("/dev/null", "w", stderr
);
1299 debug("-- screen.back debug started\n");
1302 * This guarantees that the session owner is listed, even when we
1303 * start detached. From now on we should not refer to 'LoginName'
1304 * any more, use users->u_name instead.
1306 if (UserAdd(LoginName
, (char *)0, (struct acluser
**)0) < 0)
1307 Panic(0, "Could not create user info");
1310 if (MakeDisplay(LoginName
, attach_tty
, attach_term
, n
, getppid(), &attach_Mode
) == 0)
1311 Panic(0, "Could not alloc display");
1314 D_encoding
= nwin_options
.encoding
> 0 ? nwin_options
.encoding
: 0;
1315 debug1("D_encoding = %d\n", D_encoding
);
1321 /* user started us with -S option */
1322 sprintf(socknamebuf
, "%d.%s", (int)getpid(), SockMatch
);
1326 sprintf(socknamebuf
, "%d.%s.%s", (int)getpid(), stripdev(attach_tty
),
1329 for (ap
= socknamebuf
; *ap
; ap
++)
1333 if (strlen(socknamebuf
) > NAME_MAX
)
1335 debug2("Socketname %s truncated to %d chars\n", socknamebuf
, NAME_MAX
);
1336 socknamebuf
[NAME_MAX
] = 0;
1339 sprintf(SockPath
+ strlen(SockPath
), "/%s", socknamebuf
);
1341 ServerSocket
= MakeServerSocket();
1344 # ifdef ALLOW_SYSSCREENRC
1345 if ((ap
= getenv("SYSSCREENRC")))
1346 (void)StartRc(ap
, 0);
1349 (void)StartRc(ETCSCREENRC
, 0);
1351 (void)StartRc(RcFileName
, 0);
1355 # endif /* UTNOKEEP */
1356 # endif /* UTMPOK */
1359 if (InitTermcap(0, 0))
1361 debug("Could not init termcap - exiting\n");
1362 fcntl(D_userfd
, F_SETFL
, 0); /* Flush sets FNBLOCK */
1365 Kill(D_userpid
, SIG_BYE
);
1368 MakeDefaultCanvas();
1380 signal(SIGHUP
, SigHup
);
1381 signal(SIGINT
, FinitHandler
);
1382 signal(SIGQUIT
, FinitHandler
);
1383 signal(SIGTERM
, FinitHandler
);
1385 signal(SIGTTIN
, SIG_IGN
);
1386 signal(SIGTTOU
, SIG_IGN
);
1392 SetMode(&D_OldMode
, &D_NewMode
, D_flow
, iflag
);
1393 /* Note: SetMode must be called _before_ FinishRc. */
1394 SetTTY(D_userfd
, &D_NewMode
);
1395 if (fcntl(D_userfd
, F_SETFL
, FNBLOCK
))
1396 Msg(errno
, "Warning: NBLOCK fcntl failed");
1399 brktty(-1); /* just try */
1400 signal(SIGCHLD
, SigChld
);
1402 # ifdef ALLOW_SYSSCREENRC
1403 if ((ap
= getenv("SYSSCREENRC")))
1407 FinishRc(ETCSCREENRC
);
1409 FinishRc(RcFileName
);
1411 debug2("UID %d EUID %d\n", (int)getuid(), (int)geteuid());
1412 if (windows
== NULL
)
1414 debug("We open one default window, as screenrc did not specify one.\n");
1415 if (MakeWindow(&nwin
) == -1)
1417 Msg(0, "Sorry, could not find a PTY.");
1428 if (display
&& default_startup
)
1429 display_copyright();
1430 signal(SIGINT
, SigInt
);
1431 if (rflag
&& (rflag
& 1) == 0 && !quietflag
)
1433 Msg(0, "New screen...");
1437 serv_read
.type
= EV_READ
;
1438 serv_read
.fd
= ServerSocket
;
1439 serv_read
.handler
= serv_read_fn
;
1442 serv_select
.pri
= -10;
1443 serv_select
.type
= EV_ALWAYS
;
1444 serv_select
.handler
= serv_select_fn
;
1445 evenq(&serv_select
);
1447 logflushev
.type
= EV_TIMEOUT
;
1448 logflushev
.handler
= logflush_fn
;
1456 WindowDied(p
, wstat
, wstat_valid
)
1463 if (ZombieKey_destroy
&& ZombieKey_onerror
&& wstat_valid
&&
1464 WIFEXITED(wstat
) && WEXITSTATUS(wstat
) == 0)
1467 if (ZombieKey_destroy
&& !killit
)
1469 char buf
[100], *s
, reason
[100];
1473 if (WIFEXITED(wstat
))
1474 if (WEXITSTATUS(wstat
))
1475 sprintf(reason
, "terminated with exit status %d", WEXITSTATUS(wstat
));
1477 sprintf(reason
, "terminated normally");
1478 else if (WIFSIGNALED(wstat
))
1479 sprintf(reason
, "terminated with signal %d%s", WTERMSIG(wstat
),
1481 WCOREDUMP(wstat
) ? " (core file generated)" : "");
1486 sprintf(reason
, "detached from window");
1491 s
[strlen(s
) - 1] = '\0';
1492 debug3("window %d (%s) going into zombie state fd %d",
1493 p
->w_number
, p
->w_title
, p
->w_ptyfd
);
1495 if (p
->w_slot
!= (slot_t
)0 && p
->w_slot
!= (slot_t
)-1)
1498 p
->w_slot
= 0; /* "detached" */
1503 p
->w_deadpid
= p
->w_pid
;
1506 /* p->w_y = p->w_bot; */
1507 p
->w_y
= MFindUsedLine(p
, p
->w_bot
, 1);
1508 sprintf(buf
, "\n\r=== Command %s (%s) ===", reason
, s
? s
: "?");
1509 WriteString(p
, buf
, strlen(buf
));
1510 WindowChanged(p
, 'f');
1531 signal(SIGCHLD
, SigChld
);
1534 if (stat(SockPath
, &st
) == -1)
1536 debug1("SigChldHandler: Yuck! cannot stat '%s'\n", SockPath
);
1537 if (!RecoverSocket())
1539 debug("SCREEN cannot recover from corrupt Socket, bye\n");
1543 debug1("'%s' reconstructed\n", SockPath
);
1546 debug2("SigChldHandler: stat '%s' o.k. (%03o)\n", SockPath
, (int)st
.st_mode
);
1552 debug("SigChld()\n");
1560 /* Hangup all displays */
1561 while ((display
= displays
) != 0)
1567 * the backend's Interrupt handler
1568 * we cannot insert the intrc directly, as we never know
1577 debug("SigInt()\n");
1578 if (fore
&& displays
)
1580 # if defined(TERMIO) || defined(POSIX)
1581 ibuf
= displays
->d_OldMode
.tio
.c_cc
[VINTR
];
1583 ibuf
= displays
->d_OldMode
.m_tchars
.t_intrc
;
1586 write(fore
->w_ptyfd
, &ibuf
, 1);
1589 signal(SIGINT
, SigInt
);
1590 debug("SigInt() careful\n");
1591 InterruptPlease
= 1;
1599 struct display
*disp
;
1602 #if defined(SYSVSIGS) && defined(SIGHASARG)
1603 signal(sigsig
, SIG_IGN
);
1609 sprintf(buf
, "\r\n[screen caught signal %d.%s]\r\n", sigsig
,
1611 sprintf(buf
, "\r\n[screen caught a fatal signal.%s]\r\n",
1613 #if defined(SHADOWPW) && !defined(DEBUG) && !defined(DUMPSHADOW)
1615 #else /* SHADOWPW && !DEBUG */
1617 #endif /* SHADOWPW && !DEBUG */
1619 for (disp
= displays
; disp
; disp
= disp
->d_next
)
1621 fcntl(disp
->d_userfd
, F_SETFL
, 0);
1622 SetTTY(disp
->d_userfd
, &D_OldMode
);
1623 write(disp
->d_userfd
, buf
, strlen(buf
));
1624 Kill(disp
->d_userpid
, SIG_BYE
);
1626 #if defined(SHADOWPW) && !defined(DEBUG) && !defined(DUMPSHADOW)
1627 Kill(getpid(), SIGKILL
);
1629 #else /* SHADOWPW && !DEBUG */
1631 #endif /* SHADOWPW && !DEBUG */
1639 struct win
*p
, *next
;
1648 while ((pid
= waitpid(-1, &wstat
, WNOHANG
| WUNTRACED
)) > 0)
1652 * From: rouilj@sni-usa.com (John Rouillard)
1653 * note that WUNTRACED is not documented to work, but it is defined in
1654 * /usr/include/sys/wait.h, so it may work
1656 while ((pid
= wait2(&wstat
, WNOHANG
| WUNTRACED
)) > 0)
1657 # else /* USE_WAIT2 */
1658 while ((pid
= wait3(&wstat
, WNOHANG
| WUNTRACED
, (struct rusage
*) 0)) > 0)
1659 # endif /* USE_WAIT2 */
1662 while ((pid
= wait(&wstat
)) < 0)
1666 #endif /* BSDJOBS */
1668 for (p
= windows
; p
; p
= next
)
1671 if ( (p
->w_pid
&& pid
== p
->w_pid
) ||
1672 (p
->w_deadpid
&& pid
== p
->w_deadpid
) )
1674 /* child has ceased to exist */
1678 if (WIFSTOPPED(wstat
))
1680 debug3("Window %d pid %d: WIFSTOPPED (sig %d)\n", p
->w_number
, pid
, WSTOPSIG(wstat
));
1682 if (WSTOPSIG(wstat
) == SIGTTIN
)
1684 Msg(0, "Suspended (tty input)");
1689 if (WSTOPSIG(wstat
) == SIGTTOU
)
1691 Msg(0, "Suspended (tty output)");
1695 /* Try to restart process */
1696 Msg(0, "Child has been stopped, restarting.");
1697 if (killpg(pid
, SIGCONT
))
1703 WindowDied(p
, wstat
, 1);
1708 if (p
->w_pwin
&& pid
== p
->w_pwin
->p_pid
)
1710 debug2("pseudo of win Nr %d died. pid == %d\n", p
->w_number
, p
->w_pwin
->p_pid
);
1718 debug1("pid %d not found - hope that's ok\n", pid
);
1725 FinitHandler SIGDEFARG
1728 debug1("FinitHandler called, sig %d.\n", sigsig
);
1730 debug("FinitHandler called.\n");
1740 signal(SIGCHLD
, SIG_DFL
);
1741 signal(SIGHUP
, SIG_IGN
);
1742 debug1("Finit(%d);\n", i
);
1745 struct win
*p
= windows
;
1746 windows
= windows
->w_next
;
1749 if (ServerSocket
!= -1)
1751 debug1("we unlink(%s)\n", SockPath
);
1756 (void) unlink(SockPath
);
1762 for (display
= displays
; display
; display
= display
->d_next
)
1770 AddStr("[screen is terminating]\r\n");
1772 SetTTY(D_userfd
, &D_OldMode
);
1773 fcntl(D_userfd
, F_SETFL
, 0);
1775 Kill(D_userpid
, SIG_BYE
);
1778 * we _cannot_ call eexit(i) here,
1779 * instead of playing with the Socket above. Sigh.
1789 if (ServerSocket
!= -1)
1791 debug1("we unlink(%s)\n", SockPath
);
1794 (void) unlink(SockPath
);
1804 debug1("Hangup %x\n", display
);
1810 if (auto_detach
|| displays
->d_next
)
1817 * Detach now has the following modes:
1818 *D_DETACH SIG_BYE detach backend and exit attacher
1819 *D_HANGUP SIG_BYE detach backend and exit attacher
1820 *D_STOP SIG_STOP stop attacher (and detach backend)
1821 *D_REMOTE SIG_BYE remote detach -- reattach to new attacher
1822 *D_POWER SIG_POWER_BYE power detach -- attacher kills his parent
1823 *D_REMOTE_POWER SIG_POWER_BYE remote power detach -- both
1824 *D_LOCK SIG_LOCK lock the attacher
1826 * we always remove our utmp slots. (even when "lock" or "stop")
1827 * Note: Take extra care here, we may be called by interrupt!
1840 #define AddStrSock(msg) do { \
1843 AddStr("[" msg " from "); \
1848 AddStr("[" msg "]\r\n"); \
1851 signal(SIGHUP
, SIG_IGN
);
1852 debug1("Detach(%d)\n", mode
);
1864 AddStrSock("detached");
1872 #ifdef REMOTE_DETACH
1874 AddStrSock("remote detached");
1880 AddStrSock("power detached");
1881 if (PowDetachString
)
1883 AddStr(PowDetachString
);
1886 sign
= SIG_POWER_BYE
;
1888 #ifdef REMOTE_DETACH
1889 case D_REMOTE_POWER
:
1890 AddStrSock("remote power detached");
1891 if (PowDetachString
)
1893 AddStr(PowDetachString
);
1896 sign
= SIG_POWER_BYE
;
1903 /* tell attacher to lock terminal with a lockprg. */
1907 if (displays
->d_next
== 0)
1909 for (p
= windows
; p
; p
= p
->w_next
)
1911 if (p
->w_slot
!= (slot_t
) -1 && !(p
->w_lflag
& 2))
1915 * Set the slot to 0 to get the window
1918 p
->w_slot
= (slot_t
) 0;
1922 if (mode
!= D_HANGUP
)
1925 if (displays
->d_next
== 0 && console_window
)
1927 if (TtyGrabConsole(console_window
->w_ptyfd
, 0, "detach"))
1929 debug("could not release console - killing window\n");
1930 KillWindow(console_window
);
1931 display
= displays
; /* restore display */
1937 ReleaseAutoWritelock(display
, D_fore
);
1939 D_user
->u_detachwin
= D_fore
->w_number
;
1940 D_user
->u_detachotherwin
= D_other
? D_other
->w_number
: -1;
1942 AutosaveLayout(D_layout
);
1943 layout_last
= D_layout
;
1944 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
1946 p
= Layer2Window(cv
->c_layer
);
1947 SetCanvasWindow(cv
, 0);
1949 WindowChanged(p
, 'u');
1953 debug2("display: %#x displays: %#x\n", (unsigned int)display
, (unsigned int)displays
);
1956 /* Flag detached-ness */
1959 * tell father what to do. We do that after we
1960 * freed the tty, thus getty feels more comfortable on hpux
1961 * if it was a power detach.
1964 debug2("Detach: Signal %d to Attacher(%d)!\n", sign
, pid
);
1965 debug("Detach returns, we are successfully detached.\n");
1966 signal(SIGHUP
, SigHup
);
1977 return strncmp(e
, s
, l
) == 0 && e
[l
] == '=';
1983 register char **op
, **np
;
1984 static char stybuf
[MAXSTR
];
1986 for (op
= environ
; *op
; ++op
)
1989 free((char *)NewEnv
);
1990 NewEnv
= np
= (char **) malloc((unsigned) (op
- environ
+ 7 + 1) * sizeof(char **));
1993 sprintf(stybuf
, "STY=%s", strlen(SockName
) <= MAXSTR
- 5 ? SockName
: "?");
1994 *np
++ = stybuf
; /* NewEnv[0] */
1995 *np
++ = Term
; /* NewEnv[1] */
1996 np
++; /* room for SHELL */
1998 np
+= 2; /* room for TERMCAP and WINDOW */
2000 np
+= 4; /* room for TERMCAP WINDOW LINES COLUMNS */
2003 for (op
= environ
; *op
; ++op
)
2005 if (!IsSymbol(*op
, "TERM") && !IsSymbol(*op
, "TERMCAP")
2006 && !IsSymbol(*op
, "STY") && !IsSymbol(*op
, "WINDOW")
2007 && !IsSymbol(*op
, "SCREENCAP") && !IsSymbol(*op
, "SHELL")
2008 && !IsSymbol(*op
, "LINES") && !IsSymbol(*op
, "COLUMNS")
2017 #if defined(USEVARARGS) && defined(__STDC__)
2018 Msg(int err
, char *fmt
, VA_DOTS
)
2020 Msg(err
, fmt
, VA_DOTS
)
2027 char buf
[MAXPATHLEN
*2];
2032 (void)vsnprintf(p
, sizeof(buf
) - 100, fmt
, VA_ARGS(ap
));
2039 strncpy(p
, strerror(err
), buf
+ sizeof(buf
) - p
- 1);
2040 buf
[sizeof(buf
) - 1] = 0;
2042 debug2("Msg('%s') (%#x);\n", buf
, (unsigned int)display
);
2044 if (display
&& displays
)
2048 for (display
= displays
; display
; display
= display
->d_next
)
2053 /* no displays but a display - must have forked.
2054 * send message to backend!
2056 char *tty
= D_usertty
;
2057 struct display
*olddisplay
= display
;
2058 display
= 0; /* only send once */
2059 SendErrorMsg(tty
, buf
);
2060 display
= olddisplay
;
2063 printf("%s\r\n", buf
);
2067 * Call FinitTerm for all displays, write a message to each and call eexit();
2071 #if defined(USEVARARGS) && defined(__STDC__)
2072 Panic(int err
, char *fmt
, VA_DOTS
)
2074 Panic(err
, fmt
, VA_DOTS
)
2081 char buf
[MAXPATHLEN
*2];
2086 (void)vsnprintf(p
, sizeof(buf
) - 100, fmt
, VA_ARGS(ap
));
2093 strncpy(p
, strerror(err
), buf
+ sizeof(buf
) - p
- 1);
2094 buf
[sizeof(buf
) - 1] = 0;
2096 debug3("Panic('%s'); display=%x displays=%x\n", buf
, display
, displays
);
2097 if (displays
== 0 && display
== 0)
2099 printf("%s\r\n", buf
);
2101 Kill(PanicPid
, SIG_BYE
);
2103 else if (displays
== 0)
2105 /* no displays but a display - must have forked.
2106 * send message to backend!
2108 char *tty
= D_usertty
;
2110 SendErrorMsg(tty
, buf
);
2115 for (display
= displays
; display
; display
= display
->d_next
)
2124 SetTTY(D_userfd
, &D_OldMode
);
2125 fcntl(D_userfd
, F_SETFL
, 0);
2126 write(D_userfd
, buf
, strlen(buf
));
2127 write(D_userfd
, "\n", 1);
2130 Kill(D_userpid
, SIG_BYE
);
2133 if (tty_oldmode
>= 0)
2136 if (setuid(own_uid
))
2137 xseteuid(own_uid
); /* may be a loop. sigh. */
2141 debug1("Panic: changing back modes from %s\n", attach_tty
);
2142 chmod(attach_tty
, tty_oldmode
);
2150 * '^' is allowed as an escape mechanism for control characters. jw.
2152 * Added time insertion using ideas/code from /\ndy Jones
2153 * (andy@lingua.cltr.uq.OZ.AU) - thanks a lot!
2158 static const char days
[] = "SunMonTueWedThuFriSat";
2159 static const char months
[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
2162 static char winmsg_buf
[MAXSTR
];
2163 #define MAX_WINMSG_REND 16 /* rendition changes */
2164 static int winmsg_rend
[MAX_WINMSG_REND
];
2165 static int winmsg_rendpos
[MAX_WINMSG_REND
];
2166 static int winmsg_numrend
;
2169 pad_expand(buf
, p
, numpad
, padlen
)
2178 padlen
= padlen
- (p
- buf
); /* space for rent */
2181 pn2
= pn
= p
+ padlen
;
2185 if (r
&& *p
!= 127 && p
- buf
== winmsg_rendpos
[r
- 1])
2187 winmsg_rendpos
[--r
] = pn
- buf
;
2194 i
= numpad
> 0 ? (padlen
+ numpad
- 1) / numpad
: 0;
2199 if (r
&& p
- buf
== winmsg_rendpos
[r
- 1])
2200 winmsg_rendpos
[--r
] = pn
- buf
;
2207 struct backtick
*next
;
2212 char result
[MAXSTR
];
2219 struct backtick
*backticks
;
2223 struct backtick
*bt
;
2228 for (p
= q
= bt
->result
; (c
= (unsigned char)*p
++) != 0;)
2232 if (c
>= ' ' || c
== '\005')
2239 backtick_fn(ev
, data
)
2243 struct backtick
*bt
;
2246 bt
= (struct backtick
*)data
;
2247 debug1("backtick_fn for #%d\n", bt
->num
);
2249 l
= read(ev
->fd
, bt
->buf
+ i
, MAXSTR
- i
);
2252 debug1("EOF on backtick #%d\n", bt
->num
);
2258 debug1("read %d bytes\n", l
);
2260 for (j
= 0; j
< l
; j
++)
2261 if (bt
->buf
[i
- j
- 1] == '\n')
2265 for (k
= i
- j
- 2; k
>= 0; k
--)
2266 if (bt
->buf
[k
] == '\n')
2269 bcopy(bt
->buf
+ k
, bt
->result
, i
- j
- k
);
2270 bt
->result
[i
- j
- k
- 1] = 0;
2271 backtick_filter(bt
);
2272 WindowChanged(0, '`');
2274 if (j
== l
&& i
== MAXSTR
)
2282 bcopy(bt
->buf
+ i
- j
, bt
->buf
, j
);
2289 setbacktick(num
, lifespan
, tick
, cmdv
)
2295 struct backtick
**btp
, *bt
;
2298 debug1("setbacktick called for backtick #%d\n", num
);
2299 for (btp
= &backticks
; (bt
= *btp
) != 0; btp
= &bt
->next
)
2306 for (v
= bt
->cmdv
; *v
; v
++)
2323 bt
= (struct backtick
*)malloc(sizeof *bt
);
2329 bzero(bt
, sizeof(*bt
));
2335 bt
->lifespan
= lifespan
;
2342 if (bt
->tick
== 0 && bt
->lifespan
== 0)
2344 debug("setbacktick: continuous mode\n");
2345 bt
->buf
= (char *)malloc(MAXSTR
);
2349 setbacktick(num
, 0, 0, (char **)0);
2352 bt
->ev
.type
= EV_READ
;
2353 bt
->ev
.fd
= readpipe(bt
->cmdv
);
2354 bt
->ev
.handler
= backtick_fn
;
2355 bt
->ev
.data
= (char *)bt
;
2362 runbacktick(bt
, tickp
, now
)
2363 struct backtick
*bt
;
2370 debug1("runbacktick called for backtick #%d\n", bt
->num
);
2371 if (bt
->tick
&& (!*tickp
|| bt
->tick
< *tickp
))
2373 if ((bt
->lifespan
== 0 && bt
->tick
== 0) || now
< bt
->bestbefore
)
2375 debug1("returning old result (%d)\n", bt
->lifespan
);
2378 f
= readpipe(bt
->cmdv
);
2382 while ((l
= read(f
, bt
->result
+ i
, sizeof(bt
->result
) - i
)) > 0)
2384 debug1("runbacktick: read %d bytes\n", l
);
2386 for (j
= 1; j
< l
; j
++)
2387 if (bt
->result
[i
- j
- 1] == '\n')
2389 if (j
== l
&& i
== sizeof(bt
->result
))
2391 j
= sizeof(bt
->result
) / 2;
2396 bcopy(bt
->result
+ i
- j
, bt
->result
, j
);
2401 bt
->result
[sizeof(bt
->result
) - 1] = '\n';
2402 if (i
&& bt
->result
[i
- 1] == '\n')
2404 debug1("runbacktick: finished, %d bytes\n", i
);
2406 backtick_filter(bt
);
2408 bt
->bestbefore
= now2
+ bt
->lifespan
;
2413 MakeWinMsgEv(str
, win
, esc
, padlen
, ev
, rec
)
2423 register char *p
= winmsg_buf
;
2433 int qmflag
= 0, omflag
= 0, qmnumrend
= 0;
2440 struct backtick
*bt
;
2442 if (winmsg_numrend
>= 0)
2445 winmsg_numrend
= -winmsg_numrend
;
2450 gettimeofday(&now
, NULL
);
2451 for (; *s
&& (l
= winmsg_buf
+ MAXSTR
- 1 - p
) > 0; s
++, p
++)
2457 if (*s
!= '^' && *s
>= 64)
2482 if (*++s
== esc
) /* double escape ? */
2484 if ((plusflg
= *s
== '+') != 0)
2486 if ((minusflg
= *s
== '-') != 0)
2488 if ((zeroflg
= *s
== '0') != 0)
2491 while(*s
>= '0' && *s
<= '9')
2492 num
= num
* 10 + (*s
++ - '0');
2493 if ((longflg
= *s
== 'L') != 0)
2501 if ((!qmflag
&& !omflag
) || omflag
== 1)
2504 if (qmnumrend
< winmsg_numrend
)
2505 winmsg_numrend
= qmnumrend
;
2511 qmnumrend
= winmsg_numrend
;
2512 qmflag
= omflag
= 0;
2518 if (qmflag
&& omflag
!= 1)
2522 qmnumrend
= winmsg_numrend
;
2527 if (qmnumrend
< winmsg_numrend
)
2528 winmsg_numrend
= qmnumrend
;
2532 case 'd': case 'D': case 'm': case 'M': case 'y': case 'Y':
2533 case 'a': case 'A': case 's': case 'c': case 'C':
2538 time_t nowsec
= now
.tv_sec
;
2539 tm
= localtime(&nowsec
);
2542 if (!tick
|| tick
> 3600)
2547 sprintf(p
, "%02d", tm
->tm_mday
% 100);
2551 strftime(p
, l
, (longflg
? "%A" : "%a"), tm
);
2553 sprintf(p
, "%3.3s", days
+ 3 * tm
->tm_wday
);
2557 sprintf(p
, "%02d", tm
->tm_mon
+ 1);
2561 strftime(p
, l
, (longflg
? "%B" : "%b"), tm
);
2563 sprintf(p
, "%3.3s", months
+ 3 * tm
->tm_mon
);
2567 sprintf(p
, "%02d", tm
->tm_year
% 100);
2570 sprintf(p
, "%04d", tm
->tm_year
+ 1900);
2573 sprintf(p
, tm
->tm_hour
>= 12 ? "pm" : "am");
2576 sprintf(p
, tm
->tm_hour
>= 12 ? "PM" : "AM");
2579 sprintf(p
, "%02d", tm
->tm_sec
);
2583 sprintf(p
, zeroflg
? "%02d:%02d" : "%2d:%02d", tm
->tm_hour
, tm
->tm_min
);
2584 if (!tick
|| tick
> 60)
2588 sprintf(p
, zeroflg
? "%02d:%02d" : "%2d:%02d", (tm
->tm_hour
+ 11) % 12 + 1, tm
->tm_min
);
2589 if (!tick
|| tick
> 60)
2609 if (!tick
|| tick
> 60)
2618 if (rec
>= 10 || (*s
== 'h' && (win
== 0 || win
->w_hstatus
== 0 || *win
->w_hstatus
== 0)))
2625 for (bt
= backticks
; bt
; bt
= bt
->next
)
2635 char savebuf
[sizeof(winmsg_buf
)];
2637 int oldnumrend
= winmsg_numrend
;
2640 strcpy(savebuf
, winmsg_buf
);
2641 winmsg_numrend
= -winmsg_numrend
;
2642 MakeWinMsgEv(*s
== 'h' ? win
->w_hstatus
: runbacktick(bt
, &oldtick
, now
.tv_sec
), win
, '\005', 0, (struct event
*)0, rec
+ 1);
2643 debug2("oldtick=%d tick=%d\n", oldtick
, tick
);
2644 if (!tick
|| oldtick
< tick
)
2646 if ((int)strlen(winmsg_buf
) < l
)
2647 strcat(savebuf
, winmsg_buf
);
2648 strcpy(winmsg_buf
, savebuf
);
2649 while (oldnumrend
< winmsg_numrend
)
2650 winmsg_rendpos
[oldnumrend
++] += p
- winmsg_buf
;
2659 struct win
*oldfore
= 0;
2667 ss
= AddWindows(p
, l
- 1, (*s
== 'w' ? 0 : 1) | (longflg
? 0 : 2) | (plusflg
? 4 : 0), win
? win
->w_number
: -1);
2680 AddOtherUsers(p
, l
- 1, win
);
2688 AddWindowFlags(p
, l
- 1, win
);
2695 if (win
&& (int)strlen(win
->w_title
) < l
)
2697 strcpy(p
, win
->w_title
);
2707 for (i
= 0; i
< 127; i
++)
2708 if (s
[i
] && s
[i
] != '}')
2712 if (s
[i
] == '}' && winmsg_numrend
< MAX_WINMSG_REND
)
2716 debug1("MakeWinMsg attrcolor %s\n", rbuf
);
2717 if (i
!= 1 || rbuf
[0] != '-')
2718 r
= ParseAttrColor(rbuf
, (char *)0, 0);
2719 if (r
!= -1 || (i
== 1 && rbuf
[0] == '-'))
2721 winmsg_rend
[winmsg_numrend
] = r
;
2722 winmsg_rendpos
[winmsg_numrend
] = p
- winmsg_buf
;
2732 if ((int)strlen(HostName
) < l
)
2734 strcpy(p
, HostName
);
2744 session_name
= strchr(SockName
, '.') + 1;
2745 if ((int)strlen(session_name
) < l
)
2747 strcpy(p
, session_name
);
2756 sprintf(p
, "%d", (plusflg
&& display
) ? D_userpid
: getpid());
2763 if (display
&& ((ev
&& ev
== &D_forecv
->c_captev
) || (!ev
&& win
&& win
== D_fore
)))
2764 minusflg
= !minusflg
;
2769 truncpos
= p
- winmsg_buf
;
2770 truncper
= num
> 100 ? 100 : num
;
2771 trunclong
= longflg
;
2777 if (num
|| zeroflg
|| plusflg
|| longflg
|| (*s
!= '='))
2779 /* expand all pads */
2782 num
= (plusflg
? lastpad
: padlen
) - num
;
2783 if (!plusflg
&& padlen
== 0)
2784 num
= p
- winmsg_buf
;
2789 if (*s
!= '=' && num
== 0 && !plusflg
)
2794 num
= p
- winmsg_buf
;
2796 num
= (padlen
- (plusflg
? lastpad
: 0)) * num
/ 100;
2802 if (num
> MAXSTR
- 1)
2805 p
= pad_expand(winmsg_buf
, p
, numpad
, num
);
2807 if (p
- winmsg_buf
> num
&& !longflg
)
2816 trunc
= lastpad
+ truncper
* (num
- lastpad
) / 100;
2819 if (trunc
< lastpad
)
2821 left
= truncpos
- trunc
;
2822 if (left
> p
- winmsg_buf
- num
)
2823 left
= p
- winmsg_buf
- num
;
2824 debug1("lastpad = %d, ", lastpad
);
2825 debug3("truncpos = %d, trunc = %d, left = %d\n", truncpos
, trunc
, left
);
2828 if (left
+ lastpad
> p
- winmsg_buf
)
2829 left
= p
- winmsg_buf
- lastpad
;
2830 if (p
- winmsg_buf
- lastpad
- left
> 0)
2831 bcopy(winmsg_buf
+ lastpad
+ left
, winmsg_buf
+ lastpad
, p
- winmsg_buf
- lastpad
- left
);
2834 while (r
&& winmsg_rendpos
[r
- 1] > lastpad
)
2837 winmsg_rendpos
[r
] -= left
;
2838 if (winmsg_rendpos
[r
] < lastpad
)
2839 winmsg_rendpos
[r
] = lastpad
;
2843 if (p
- winmsg_buf
> lastpad
)
2844 winmsg_buf
[lastpad
] = '.';
2845 if (p
- winmsg_buf
> lastpad
+ 1)
2846 winmsg_buf
[lastpad
+ 1] = '.';
2847 if (p
- winmsg_buf
> lastpad
+ 2)
2848 winmsg_buf
[lastpad
+ 2] = '.';
2851 if (p
- winmsg_buf
> num
)
2853 p
= winmsg_buf
+ num
;
2856 if (num
- 1 >= lastpad
)
2858 if (num
- 2 >= lastpad
)
2860 if (num
- 3 >= lastpad
)
2864 while (r
&& winmsg_rendpos
[r
- 1] > num
)
2865 winmsg_rendpos
[--r
] = num
;
2869 if (lastpad
> p
- winmsg_buf
)
2870 lastpad
= p
- winmsg_buf
;
2871 debug1("lastpad now %d\n", lastpad
);
2875 while (p
- winmsg_buf
< num
)
2877 lastpad
= p
- winmsg_buf
;
2880 debug1("lastpad2 now %d\n", lastpad
);
2886 *p
= 127; /* internal pad representation */
2900 sprintf(p
, "%*s", num
, num
> 1 ? "--" : "-");
2902 sprintf(p
, "%*d", num
, win
->w_number
);
2909 if (qmpos
&& !qmflag
)
2914 if (padlen
> MAXSTR
- 1)
2915 padlen
= MAXSTR
- 1;
2916 p
= pad_expand(winmsg_buf
, p
, numpad
, padlen
);
2920 evdeq(ev
); /* just in case */
2921 ev
->timeout
.tv_sec
= 0;
2922 ev
->timeout
.tv_usec
= 0;
2926 now
.tv_usec
= 100000;
2930 now
.tv_sec
+= tick
- (now
.tv_sec
% tick
);
2932 debug2("NEW timeout %d %d\n", ev
->timeout
.tv_sec
, tick
);
2938 MakeWinMsg(s
, win
, esc
)
2943 return MakeWinMsgEv(s
, win
, esc
, 0, (struct event
*)0, 0);
2947 PutWinMsg(s
, start
, max
)
2953 struct mchar rendstack
[MAX_WINMSG_REND
];
2956 if (s
!= winmsg_buf
)
2958 /* sorry, no fancy coloring available */
2959 debug1("PutWinMsg %s plain\n", s
);
2972 debug2("PutWinMsg %s start attr %x\n", s
, rend
.attr
);
2973 for (i
= 0; i
< winmsg_numrend
&& max
> 0; i
++)
2975 if (p
> winmsg_rendpos
[i
] || winmsg_rendpos
[i
] > l
)
2977 if (p
< winmsg_rendpos
[i
])
2979 n
= winmsg_rendpos
[i
] - p
;
2996 rend
= rendstack
[--rendstackn
];
3000 rendstack
[rendstackn
++] = rend
;
3001 ApplyAttrColor(r
, &rend
);
3003 SetRendition(&rend
);
3031 if ((j
= open("/dev/null", 0)) >= 0)
3038 while (dup(++i
) < 0 && errno
!= EBADF
)
3040 debug1(" [%d]\n", i
);
3053 serv_read_fn(ev
, data
)
3057 debug("Knock - knock!\n");
3062 serv_select_fn(ev
, data
)
3068 debug("serv_select_fn called\n");
3069 /* XXX: messages?? */
3074 if (InterruptPlease
)
3076 debug("Backend received interrupt\n");
3077 /* This approach is rather questionable in a multi-display
3079 if (fore
&& displays
)
3081 #if defined(TERMIO) || defined(POSIX)
3082 char ibuf
= displays
->d_OldMode
.tio
.c_cc
[VINTR
];
3084 char ibuf
= displays
->d_OldMode
.m_tchars
.t_intrc
;
3087 write(W_UWP(fore
) ? fore
->w_pwin
->p_ptyfd
: fore
->w_ptyfd
,
3089 debug1("Backend wrote interrupt to %d", fore
->w_number
);
3090 debug1("%s\n", W_UWP(fore
) ? " (pseudowin)" : "");
3092 write(fore
->w_ptyfd
, &ibuf
, 1);
3093 debug1("Backend wrote interrupt to %d\n", fore
->w_number
);
3096 InterruptPlease
= 0;
3099 for (p
= windows
; p
; p
= p
->w_next
)
3101 if (p
->w_bell
== BELL_FOUND
|| p
->w_bell
== BELL_VISUAL
)
3104 int visual
= p
->w_bell
== BELL_VISUAL
|| visual_bell
;
3105 p
->w_bell
= BELL_ON
;
3106 for (display
= displays
; display
; display
= display
->d_next
)
3108 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3109 if (cv
->c_layer
->l_bottom
== &p
->w_layer
)
3113 p
->w_bell
= BELL_DONE
;
3114 Msg(0, "%s", MakeWinMsg(BellString
, p
, '%'));
3116 else if (visual
&& !D_VB
&& (!D_status
|| !D_status_bell
))
3118 Msg(0, "%s", VisualBellString
);
3122 debug1("using vbell timeout %d\n", VBellWait
);
3123 SetTimeout(&D_statusev
, VBellWait
);
3127 /* don't annoy the user with two messages */
3128 if (p
->w_monitor
== MON_FOUND
)
3129 p
->w_monitor
= MON_DONE
;
3130 WindowChanged(p
, 'f');
3132 if (p
->w_monitor
== MON_FOUND
)
3135 p
->w_monitor
= MON_ON
;
3136 for (display
= displays
; display
; display
= display
->d_next
)
3138 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3139 if (cv
->c_layer
->l_bottom
== &p
->w_layer
)
3142 continue; /* user already sees window */
3144 if (!(ACLBYTE(p
->w_mon_notify
, D_user
->u_id
) & ACLBIT(D_user
->u_id
)))
3145 continue; /* user doesn't care */
3147 Msg(0, "%s", MakeWinMsg(ActivityString
, p
, '%'));
3148 p
->w_monitor
= MON_DONE
;
3150 WindowChanged(p
, 'f');
3154 for (display
= displays
; display
; display
= display
->d_next
)
3157 if (D_status
== STATUS_ON_WIN
)
3159 /* XXX: should use display functions! */
3160 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3164 /* normalize window, see resize.c */
3165 lx
= cv
->c_layer
->l_x
;
3166 ly
= cv
->c_layer
->l_y
;
3167 if (lx
== cv
->c_layer
->l_width
)
3169 if (ly
+ cv
->c_yoff
< cv
->c_ys
)
3171 int i
, n
= cv
->c_ys
- (ly
+ cv
->c_yoff
);
3172 cv
->c_yoff
= cv
->c_ys
- ly
;
3173 RethinkViewportOffsets(cv
);
3174 if (n
> cv
->c_layer
->l_height
)
3175 n
= cv
->c_layer
->l_height
;
3177 LScrollV(flayer
, -n
, 0, flayer
->l_height
- 1, 0);
3178 LayRedisplayLine(-1, -1, -1, 1);
3179 for (i
= 0; i
< n
; i
++)
3180 LayRedisplayLine(i
, 0, flayer
->l_width
- 1, 1);
3181 if (cv
== cv
->c_display
->d_forecv
)
3185 else if (ly
+ cv
->c_yoff
> cv
->c_ye
)
3187 int i
, n
= ly
+ cv
->c_yoff
- cv
->c_ye
;
3188 cv
->c_yoff
= cv
->c_ye
- ly
;
3189 RethinkViewportOffsets(cv
);
3190 if (n
> cv
->c_layer
->l_height
)
3191 n
= cv
->c_layer
->l_height
;
3193 LScrollV(flayer
, n
, 0, cv
->c_layer
->l_height
- 1, 0);
3194 LayRedisplayLine(-1, -1, -1, 1);
3195 for (i
= 0; i
< n
; i
++)
3196 LayRedisplayLine(i
+ flayer
->l_height
- n
, 0, flayer
->l_width
- 1, 1);
3197 if (cv
== cv
->c_display
->d_forecv
)
3201 if (lx
+ cv
->c_xoff
< cv
->c_xs
)
3203 int i
, n
= cv
->c_xs
- (lx
+ cv
->c_xoff
);
3204 if (n
< (cv
->c_xe
- cv
->c_xs
+ 1) / 2)
3205 n
= (cv
->c_xe
- cv
->c_xs
+ 1) / 2;
3206 if (cv
->c_xoff
+ n
> cv
->c_xs
)
3207 n
= cv
->c_xs
- cv
->c_xoff
;
3209 RethinkViewportOffsets(cv
);
3210 if (n
> cv
->c_layer
->l_width
)
3211 n
= cv
->c_layer
->l_width
;
3213 LayRedisplayLine(-1, -1, -1, 1);
3214 for (i
= 0; i
< flayer
->l_height
; i
++)
3216 LScrollH(flayer
, -n
, i
, 0, flayer
->l_width
- 1, 0, 0);
3217 LayRedisplayLine(i
, 0, n
- 1, 1);
3219 if (cv
== cv
->c_display
->d_forecv
)
3223 else if (lx
+ cv
->c_xoff
> cv
->c_xe
)
3225 int i
, n
= lx
+ cv
->c_xoff
- cv
->c_xe
;
3226 if (n
< (cv
->c_xe
- cv
->c_xs
+ 1) / 2)
3227 n
= (cv
->c_xe
- cv
->c_xs
+ 1) / 2;
3228 if (cv
->c_xoff
- n
+ cv
->c_layer
->l_width
- 1 < cv
->c_xe
)
3229 n
= cv
->c_xoff
+ cv
->c_layer
->l_width
- 1 - cv
->c_xe
;
3231 RethinkViewportOffsets(cv
);
3232 if (n
> cv
->c_layer
->l_width
)
3233 n
= cv
->c_layer
->l_width
;
3235 LayRedisplayLine(-1, -1, -1, 1);
3236 for (i
= 0; i
< flayer
->l_height
; i
++)
3238 LScrollH(flayer
, n
, i
, 0, flayer
->l_width
- 1, 0, 0);
3239 LayRedisplayLine(i
, flayer
->l_width
- n
, flayer
->l_width
- 1, 1);
3241 if (cv
== cv
->c_display
->d_forecv
)
3248 for (display
= displays
; display
; display
= display
->d_next
)
3250 if (D_status
== STATUS_ON_WIN
|| D_cvlist
== 0 || D_cvlist
->c_next
== 0)
3252 debug1("serv_select_fn: Restore on cv %#x\n", (int)D_forecv
);
3253 CV_CALL(D_forecv
, LayRestore();LaySetCursor());
3258 logflush_fn(ev
, data
)
3266 if (!islogfile(NULL
))
3267 return; /* no more logfiles */
3269 n
= log_flush
? log_flush
: (logtstamp_after
+ 4) / 5;
3272 SetTimeout(ev
, n
* 1000);
3273 evenq(ev
); /* re-enqueue ourself */
3277 /* write fancy time-stamp */
3278 for (p
= windows
; p
; p
= p
->w_next
)
3282 p
->w_logsilence
+= n
;
3283 if (p
->w_logsilence
< logtstamp_after
)
3285 if (p
->w_logsilence
- n
>= logtstamp_after
)
3287 buf
= MakeWinMsg(logtstamp_string
, p
, '%');
3288 logfwrite(p
->w_log
, buf
, strlen(buf
));
3293 * Interprets ^?, ^@ and other ^-control-char notation.
3294 * Interprets \ddd octal notation
3296 * The result is placed in *cp, p is advanced behind the parsed expression and
3305 if (*p
== '^' && p
[1])
3315 else if (*p
== '\\' && *++p
<= '7' && *p
>= '0')
3319 *cp
= *cp
* 8 + *p
- '0';
3320 while (*++p
<= '7' && *p
>= '0');
3331 unsigned char buf
[2];
3334 SetEscape((struct acluser
*)0, -1, -1);
3337 if ((p
= ParseChar(p
, (char *)buf
)) == NULL
||
3338 (p
= ParseChar(p
, (char *)buf
+1)) == NULL
|| *p
)
3340 SetEscape((struct acluser
*)0, buf
[0], buf
[1]);