1 * Home 2 * FAQ 3 * Y2K 4 __________________________________________________________________ 5 6FAQ 7 8 For the people who do not read the manual! 9 10 Why is the meta key broken in tcsh-5.20 and up? 11 12 On some machines the tty is not set up to pass 8 bit characters by 13 default. Tcsh 5.19 used to try to determine if pass8 should be set by 14 looking at the terminal's meta key. Unfortunately there is no good way 15 of determining if the terminal can really pass 8 characters or not. 16 Consider if you are logged in through a modem line with 7 bits and 17 parity and your terminal has a meta key. Then tcsh 5.19 would set 18 wrongly set pass8. 19 20 If you did like the previous behavior you can add in /etc/csh.login, or 21 in .login: 22 if ( $?tcsh && $?prompt ) then 23 if ( "`echotc meta`" == "yes" ) then 24 stty pass8 25 endif 26 endif 27 28 If you don't have pass8, maybe one of these would work: 29 stty -parity -evenp -oddp cs8 -istrip (rs6000) 30 stty -parenb -istrip cs8 31 32 Finally, tcsh will bind all printable meta characters to the self 33 insert command. If you don't want that to happen (i.e. use the 34 printable meta characters for commands) setenv NOREBIND. 35 36 I ran dbxtool & and shelltool & from tcsh, and they end up in cbreak and no 37 echo mode? 38 39 These programs are broken. Background jobs should not try to look at 40 the tty. What happens is that dbxtool looks in stderr to inherit the 41 tty setups, but tcsh sets up the tty in cbreak and -echo modes, so that 42 it can do line editing. This cannot be fixed because tcsh cannot give 43 away the tty. Pick one of the following as a workaround: 44 dbxtool < /dev/null >& /dev/null & 45 /usr/etc/setsid dbxtool & 46 47 If that does not work, for dbxtool at least you can add sh stty sane in 48 your .dbxinit file. 49 50 I tried to compile tcsh and it cannot find <locale.h>? 51 52 Your system does not support NLS. Undefine NLS in config_f.h and it 53 should work fine. 54 55 Where can I get csh sources? 56 57 Csh sources are now available with the 4.4BSD networking distributions. 58 You don't need csh sources to compile tcsh-6.0x. 59 60 I just made tcsh my login shell, and I cannot ftp any more? 61 62 Newer versions of the ftp daemon check for the validity of the user's 63 shell before they allow logins. The list of valid login shells is 64 either hardcoded or it is usually in a file called /etc/shells. If it 65 is hard-coded, then you are out of luck and your best bet is to get a 66 newer version of ftpd. Otherwise add tcsh to the list of shells. (For 67 AIX this file is called /etc/security/login.cfg.) Remember that the 68 full path is required. If there is no /etc/shells, and you are creating 69 one, remember to add /bin/csh, /bin/sh, and any other valid shells for 70 your system, so that other people can ftp too. 71 72 I am using SunView or OpenWindows and editing is screwed up. In particular my 73 arrow keys and backspace don't work right. What am I doing wrong? 74 75 Well, cmdtool tries to do its own command line editing and the effect 76 you get is one of using an editor inside an editor. Both try to 77 interpret the arrow key sequences and cmdtool wins since it gets them 78 first. The solutions are in my order of preference: 79 * Don't use suntools 80 * Use shelltool instead of cmdtool. 81 * Unset edit in tcsh. 82 83 On a SPARCstation running Solaris 2.x and OpenWindows 3.1, inside a cmdtool, 84 the short-cut key sequence to clear log (i.e. Meta-e or Diamond-e) doesn't 85 work: it just echos ���e���; or 86 87 Unset edit in tcsh. 88 89 On a SPARCstation running Solaris 2.x and OpenWindows 3.1, maketool (within 90 SPARCworks) doesn't work: it just does a `cd��� to the working directory then 91 stops. 92 93 Unset edit in tcsh. Using shelltool instead of cmdtool does not fix 94 this. 95 96 I rlogin to another machine, and then no matter what I tell stty I cannot get 97 it to pass 8 bit characters? 98 99 Maybe you need to use rlogin -8 to tell rlogin to pass 8 bit 100 characters. 101 102 Where do I get the public domain directory library? 103 104 Anonymous ftp to ftp://prep.ai.mit.edu/pub/gnu/dirent.tar.Z 105 106 I compiled tcsh using gcc, and when I start up it says: tcsh: Warning no 107 access to tty (Invalid Argument). Thus no job control in this shell 108 109 Your <sys/ioctl.h> file is not ansi compliant. You have one of 3 110 choices: 111 * Run fixincludes from the gcc distribution. 112 * Add -traditional to the gcc flags. 113 * Compile with cc. 114 115 I compiled tcsh with the SunOS unbundled compiler and now things get echoed 116 twice. 117 118 It is a bug in the unbundled optimizer. Lower the optimization level. 119 120 How can I use the arrow keys with hpterm? 121 122 Hp terminals use the arrow keys internally. You can tell hpterm not to 123 do that, by sending it the termcap sequence smkx. Since this has to be 124 done all the time, the easiest thing is to put it as an alias for 125 precmd, or inside the prompt: 126 if ($term == "hp") then 127 set prompt="%{`echotc smkx`%}$prompt" 128 endif 129 130 Note that by doing that you cannot use pgup and pgdn to scroll��� Also if 131 you are using termcap, replace smkx with ks. 132 133 On POSIX machines ^C and ^Z do not work when tcsh is a login shell? 134 135 Make sure that the interrupt character is set to ^C and suspend is set 136 to ^Z; stty -a will show you the current stty settings; stty intr ^C 137 susp ^Z will set them to ^C and ^Z respectively. 138 139 I am trying to compile tcsh and I am getting compile errors that look like: 140 141 sh.c:???: `STR???' undeclared, outside of functions [gcc] 142 "sh.c", line ???: STR??? undefined [cc] 143 144 You interrupted make, while it was making the automatically generated 145 headers. Type make clean; make 146 147 On the cray, sometimes the CR/LF mapping gets screwed up. 148 149 You are probably logged in to the cray via telnet. Cray's telnetd 150 implements line mode selection the telnet client you are using does not 151 implement telnet line mode. This cause the Cray's telnetd to try to use 152 KLUDGELINEMODE. You can turn off telnet line mode from the cray side by 153 doing a stty -extproc, or you can get the Cray AIC to build a telnetd 154 without KLUDGELINEMODE, or you can compile a new telnet client (from 155 the BSD net2 tape), or at least on the suns use: mode character. 156 157 On AU/X, I made tcsh my startup shell, but the mac desktop is not starting up 158 (no X11 or Finder), and I only get console emulation. 159 160 Add the pathname to tcsh in /etc/shells and everything should work 161 fine. 162 163 On machines that use YP (NIS) tilde expansion might end up in /dev/null 164 165 If this happens complain to your vendor, to get a new version of NIS. 166 You can fix that in tcsh by defining YPBUGS in config.h 167 168 Script on SGI 4.0.5 does not give us a tty, so we cannot have job control. 169 170 Their csh does not have job control either. Try: 171 % script 172 % cat > /dev/tty 173 174 I start tcsh and it takes a couple of minutes to get the prompt. 175 176 You have defined REMOTEHOST and your DNS is not responding. Either 177 undefine REMOTEHOST and recompile or fix your DNS. 178 179 If you need help generating your .cshrc file, check out: 180 181 * https://github.com/tcsh-org/tcsh/blob/master/dot.tcshrc 182 * https://github.com/tcsh-org/tcsh/blob/master/dot.login 183 184 On POSIX systems the kernel will send hup signals to all the processes in the 185 foreground process group if ���stty hupcl��� is set. 186 187 For example 188 ./tcsh 189 echo $$ 190 591 191 ./tcsh 192 kill -6 591 193 194 Will kill everything, since hup will be sent to all tcsh processes. To 195 avoid that you can set stty -hupcl, but it is not recommended. 196 197 When I rsh the meta key stops working on the remote machine. 198 199 Try using rsh -8; this option is undocumented on some systems, but it 200 works. If that does not work, get and use ssh/sshd. You'll be better 201 off from a security point of view anyway. 202 203 Tcsh compiled under hp/ux-10.x does not pass resource limits correctly when 204 ran on hp/ux-11.x systems. 205 206 This is a problem with lack of ABI compatibility between the two 207 systems. The only solution is to recompile. 208 209 Refreshing in command line editing can appear broken on some OS's 210 211 This is because the termcap/terminfo description lies about the ability 212 of the terminal to use tabs. At least on Compaq/DEC Alpha OSF/1 3.x and 213 4.x systems, stty -tabs will cause problems. 214 215 Where can I learn the merits of tcsh vs. bash vs. csh vs. sh etc? 216 217 You can read the manual page section titled [NEW FEATURES] listing 218 features that tcsh adds to csh. 219 220 You can read Tom Christiansen's Csh Programming Considered Harmful, a 221 document advocating that csh (and by extension, tcsh) should not be 222 used for writing shell scripts. 223 224 XXX: Need to find something about bash, but bash is sh-compatible and 225 has many of the same interactive features of tcsh (command completion 226 does not appear to be as flexible, though). 227 228 Curtains up: introducing the Z shell has a pretty good rundown on zsh. 229 Aside from the arguments about csh being evil, tcsh appears to compare 230 well with zsh. Zsh is sh and ksh compatible, with many of the 231 interactive features of tcsh. 232 233 Why does FreeBSD's tcsh do history browsing differently than I expect? 234 235 On FreeBSD, by default, the up arrow is set to history-search-backward, 236 rather than the default up-history. As a result, if you type (part of) 237 a word and press up arrow, you'll see previous commands that match the 238 prefix. Pretty useful, actually, although it takes some getting used 239 to. You can use bindkey to see your settings, and to rebind up & down 240 differently if desired. 241 __________________________________________________________________ 242 243 Page content last updated on 2019-12-31 244