On February 06 2005 09:16, you wrote:
> The test file is displayed without troubles here. I'm testing with
> konsole and $TERM=xterm.
I also have $TERM=xterm
> What does "ls -l /dev/tty" show? Do you have other programs that behave
> strangely?
$ ls -l /dev/tty
crw-rw-rw- 1 root tty 5, 0 Feb 6 09:29 /dev/tty
As far as I can tell, less is the only program on my machine behaving
strangely. Also, if I ssh into another machine from mine, less seems to work
correctly, while the opposite does not work (ssh to my machine from another).
I also downloaded and compiled less-382, and it works just fine.
> Besides that, maybe strace shows something...
I've attached the output of strace, but I suspect you may not find anything
interesting in it because the problem seems to go away when I run less
through strace. I used this command:
strace less testfile 2>less.strace
>
> Thomas
>
> Luke Campagnola wrote:
> > On February 02 2005 06:43, you wrote:
> >>-S really should make a visible difference
> >
> > None whatsoever.
> >
> >>Is this happining on all files as soon as they contain lines longer than
> >>then screen or do some work and some don't? What is the simplest file it
> >>happens on?
> >
> > As an example, I have written a file that consists of 40 lines of
> > "abcdefghijklmnopqrstuvwxyz0123456789"
> >
> > If I make my console window very small - 26x12 (to cause wrapping, and
> > such that it fits nicely in an e-mail) and view this file in less, I see:
> >
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> >
> > This looks ok. Now I'll press the down arrow once, then the up arrow
> > once. Here's what I see:
> >
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789klmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> >
> > Now if I press the down arrow again, I see this:
> >
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> > abcdefghijklmnopqrstuvwxyz
> > abcdefghijklmnopqrstuvwxyz
> > 0123456789
> >
> >>Do you have any environment variables or configuration files that affect
> >>less' behavior? Like ~/.less, $LESS, $LESSOPEN?
> >
> > No ~/.less file, and no variables with "LESS" in them. The problem exists
> > in both xterm, konsole, and on a plain console. I also noticed that when
> > less first opens this kind of file, it displays too many lines. For
> > instance, in the example above, less tried to display the first 12 lines,
> > even though there was only room for 6 since the lines were wrapped
> > around.
> >
> > Luke
execve("/usr/bin/less", ["less", "tmp/testfile"], [/* 21 vars */]) = 0
uname({sys="Linux", node="rock", ...}) = 0
brk(0) = 0x8063000
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x40017000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.preload", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=19, ...}) = 0
old_mmap(NULL, 19, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0x40018000
close(3) = 0
open("/lib/libsafe.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\24\24\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=18676, ...}) = 0
old_mmap(NULL, 21808, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40019000
old_mmap(0x4001e000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x4000) = 0x4001e000
close(3) = 0
munmap(0x40018000, 19) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=101204, ...}) = 0
old_mmap(NULL, 101204, PROT_READ, MAP_PRIVATE, 3, 0) = 0x4001f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/usr/lib/libncurses.so.5", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220\342"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=252592, ...}) = 0
old_mmap(NULL, 257868, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40038000
old_mmap(0x4006e000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x35000) = 0x4006e000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/tls/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340X\1"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1279300, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x40077000
old_mmap(NULL, 1289612, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40078000
old_mmap(0x401a8000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x12f000) = 0x401a8000
old_mmap(0x401b1000, 7564, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x401b1000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/tls/libdl.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220\32"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=9432, ...}) = 0
old_mmap(NULL, 12288, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x401b3000
old_mmap(0x401b5000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x1000) = 0x401b5000
close(3) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x401b6000
set_thread_area({entry_number:-1 -> 6, base_addr:0x401b6080, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,
useable:1}) = 0
munmap(0x4001f000, 101204) = 0
readlink("/proc/self/exe", "/usr/bin/less", 4095) = 13
brk(0) = 0x8063000
brk(0x8084000) = 0x8084000
open("/etc/libsafe.exclude", O_RDONLY) = -1 ENOENT (No such file or directory)
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
access("/home/lcampagn/.terminfo/x/xterm", R_OK) = -1 ENOENT (No such file or
directory)
access("/etc/terminfo/x/xterm", R_OK) = 0
open("/etc/terminfo/x/xterm", O_RDONLY) = 3
read(3, "\32\1\34\0\35\0\17\0\235\1\226\4", 12) = 12
read(3, "xterm|X11 terminal emulator\0", 28) = 28
read(3, "\0\1\0\0\1\0\0\0\1\0\0\0\0\1\1\0\0\0\0\0\0\0\1\0\0\1\0"..., 29) = 29
read(3, "\0", 1) = 1
read(3, "P\0\10\0\30\0\377\377\377\377\377\377\377\377\377\377\377"..., 30) = 30
read(3, "\0\0\4\0\6\0\10\0\31\0\36\0&\0*\0.\0\377\3779\0J\0L\0P"..., 826) = 826
read(3, "\33[Z\0\7\0\r\0\33[%i%p1%d;%p2%dr\0\33[3g\0\33["..., 1174) = 1174
read(3, "", 10) = 0
close(3) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=41, ws_col=105, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(2, TIOCGWINSZ, 0xbffff1a8) = -1 ENOTTY (Inappropriate ioctl for
device)
open("/usr/bin/.sysless", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
directory)
open("/etc/sysless", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
directory)
open("/home/lcampagn/.less", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
directory)
open("/dev/tty", O_RDONLY|O_LARGEFILE) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
fsync(3) = -1 EINVAL (Invalid argument)
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...})
= 0
rt_sigaction(SIGINT, {0x80587d0, [INT], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTSTP, {0x8058810, [TSTP], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGWINCH, {0x8058850, [WINCH], SA_RESTART}, {SIG_DFL}, 8) = 0
stat64("tmp/testfile", {st_mode=S_IFREG|0644, st_size=15731, ...}) = 0
stat64("tmp/testfile", {st_mode=S_IFREG|0644, st_size=15731, ...}) = 0
open("tmp/testfile", O_RDONLY|O_LARGEFILE) = 4
_llseek(4, 1, [1], SEEK_SET) = 0
_llseek(4, 0, [0], SEEK_SET) = 0
read(4, "abcdefghijklmnopqrstuvwxyz012345"..., 64) = 64
_llseek(4, 1, [1], SEEK_SET) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=15731, ...}) = 0
_llseek(4, 0, [0], SEEK_SET) = 0
write(1, "\33[?1049h\33[?1h\33=\33[41;1H\33[K", 25) = 25
read(4, "abcdefghijklmnopqrstuvwxyz012345"..., 8192) = 8192
write(1, "abcdefghijklmnopqrstuvwxyz012345"..., 1023) = 1023
write(1, "bcdefghijklmnopqrstuvwxyz0123456"..., 1023) = 1023
time([1107708601]) = 1107708601
write(1, "cdefghijklmnopqrstuvwxyz01234567"..., 906) = 906
read(3, "\33", 1) = 1
write(1, "\33[41;1H\33[K \33[KESC\10\10\10ESC", 23) = 23
read(3, "O", 1) = 1
write(1, "\33[KO\10O", 6) = 6
read(3, "B", 1) = 1
write(1, "\33[KB\10B\33[41;1H", 13) = 13
write(1, "\33[41;1H\33[Kabcdefghijklmnopqrstuv"..., 127) = 127
read(3, "\33", 1) = 1
write(1, "\33[41;1H\33[K \33[KESC\10\10\10ESC", 23) = 23
read(3, "O", 1) = 1
write(1, "\33[KO\10O", 6) = 6
read(3, "B", 1) = 1
write(1, "\33[KB\10B\33[41;1H", 13) = 13
time([1107708603]) = 1107708603
write(1, "\33[41;1H\33[K789abcdefghijklmnopqrs"..., 61) = 61
read(3, "\33", 1) = 1
write(1, "\33[41;1H\33[K \33[KESC\10\10\10ESC", 23) = 23
read(3, "O", 1) = 1
write(1, "\33[KO\10O", 6) = 6
read(3, "A", 1) = 1
write(1, "\33[KA\10A\33[41;1H", 13) = 13
write(1, "\33[H\33M789abcdefghijklmnopqrstuvwx"..., 56) = 56
read(3, "\33", 1) = 1
write(1, "\33[41;1H\33[K \33[KESC\10\10\10ESC", 23) = 23
read(3, "O", 1) = 1
write(1, "\33[KO\10O", 6) = 6
read(3, "A", 1) = 1
write(1, "\33[KA\10A\33[41;1H", 13) = 13
time([1107708604]) = 1107708604
write(1, "\33[H\33Mabcdefghijklmnopqrstuvwxyz0"..., 122) = 122
read(3, "q", 1) = 1
close(4) = 0
write(1, "\33[41;1H\33[K\33[?1l\33>\33[?1049l", 25) = 25
fsync(3) = -1 EINVAL (Invalid argument)
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...})
= 0
ioctl(3, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
exit_group(0) = ?
