| From: Dave Anderson <anderson@xxxxxxxxxx> | | Chip Coldwell wrote: | > On Tue, 3 Jul 2007, D. Hugh Redelmeier wrote: | > >==> It does not say in what way the terminal is not fully | > >functional. That seems like a bug. | > Well, the issue is that the emacs terminal emulator does not fully | > support the [n]curses escape sequences needed to position the cursor | > for your pager (e.g. less). The whole point of termcap/terminfo is to tame the whacky world of terminal diversity. There is nothing "wrong" with a terminal that does not have features needed by less(1). In fact less(1) would almost never be useful within an emacs/jove terminal window even if it did work: emacs/jove has more appropriate facilities built in. The same goes for readline within an emacs/jove terminal. | I would think the easiest way to deal with this issue would be | to not allow crash to use "less" if the TERM type is "vanilla". | And if it is vanilla, fall back to using "more", which is what | is done now if "less" doesn't exist on the host system. The name of an entry in termcap/terminfo is not supposed to be material. One is supposed to make decisions based on the declared attributes. Unfortunately, less(1) does not document what capabilities it requires: neither in the man page nor in the warning messages. I don't care enough to read the source code, and in any case anything learned there would be provisional since it isn't part of the "contract". Getting crash entagled with termcap/terminfo on behalf of less(1) is probably a bad idea. Mind you, I expect crash already is involved with termca/terminfo through using readline (I've not checked). I suspect that the current situation is probably better than trying to fix it. A simple "set scroll off" cures the problem for a run. Making this clear in documentation would be a modest improvement. Is there a simple way of turning off readline? To make the problem harder: I want to do it some times (i.e. when running crash under jove) but not at others (i.e. when running crash directly in an xterm). Here is a proposed patch to the man page. =================================================================== RCS file: RCS/crash.8,v retrieving revision 1.1 diff -u -r1.1 crash.8 --- crash.8 2007/07/09 15:41:55 1.1 +++ crash.8 2007/07/09 18:16:56 @@ -5,7 +5,7 @@ .TH CRASH 8 .SH NAME crash \- Analyze Linux crash data or a live system -.SH SYNAPSIS +.SH SYNOPSIS .B crash [ .B -h @@ -44,7 +44,7 @@ core dump has been created by the Red Hat .I netdump facility. It is loosely based on the SVR4 UNIX crash -command, but has been signficantly enhanced +command, but has been significantly enhanced by completely merging it with the .I gdb debugger. The marriage of the two effectively combines the @@ -207,11 +207,11 @@ .I dis disassembles memory, either entire kernel functions, from a location for a specified number of instructions, or from the start of a -fuction up to a specified memory location. +function up to a specified memory location. .TP .I eval evalues an expression or numeric type and displays the result -in hexidecimal, decimal, octal and binary. +in hexadecimal, decimal, octal and binary. .TP .I exit causes @@ -230,7 +230,7 @@ in the system. .TP .I fuser -displays the tasks using the specifed file or socket. +displays the tasks using the specified file or socket. .TP .I gdb passes its argument to the underlying @@ -274,7 +274,7 @@ display various network related data. .TP .I p -passes its argumnts to the +passes its arguments to the .I gdb "print" command for evaluation and display. .TP @@ -361,11 +361,54 @@ .I wr modifies the contents of memory. When writing to memory on a live system, this command should obviously be used with great care. +.SH FILES +.TP +.I ~/.crashrc +initialization commands +.SH ENVIRONMENT +.TP +.B EDITOR +Command input is read using +.BR readline(3). +If +.B EDITOR +is set to +.I emacs +or +.I vi +then suitable keybindings are used. This can be overridden by ``\fBset\ vi\fP'' +or ``\fBset\ emacs\fP'' commands, but only in +.IR ~/.crashrc . +.SH NOTES +.PP +If +.B crash +does not work, look for a newer version: kernel evolution frequently makes +.B crash +updates necessary. +.PP +The command ``\fBset\ scroll\ off\fP'' will cause output to be sent directly to +the terminal rather than through a paging program. This is useful, +for example, if you are running +.B crash +in a window of +.BR emacs . .SH AUTHOR Dave Anderson <anderson@xxxxxxxxxx> wrote .B Crash .TP Jay Fenlason <fenlason@xxxxxxxxxx> wrote this man page. .SH "SEE ALSO" -netdump(8) -gdb(1) +.PP +The +.B help +command within +.B crash +provides more complete and accurate documentation than this manpage. +.TP +.I http://people.redhat.com/anderson/ +The home page of +.IR crash . +.PP +.BR netdump (8), +.BR gdb (1) ================ end ================ -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
