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ID Category Severity Reproducibility Date Submitted Last Update
0003264 [BusyBox] Other minor always 05-07-08 03:55 06-07-08 17:40
Reporter Reiner View Status public  
Assigned To BusyBox
Priority normal Resolution fixed  
Status closed   Product Version
Summary 0003264: less ends in last_modifying_cmd overrun
Description Hello,
I have the following problem:
  less test.log --> ok
  cat test.log | busybox less --> ok
  cat test.log | less --> last_modifying_cmd overrun
After this call the shell isn't usable anymore.
I've tried this with busybox versions 1.9.1, 1.9.2 and 1.10.1.
All the same.

Any Idea what is going wrong?
Regards
Reiner
Additional Information Busybox is running on a powerpc.
Attached Files

- Relationships

- Notes
(0007464)
vda
05-07-08 05:22

 last_modifying_cmd is a static variable in vi.c, I have no idea what you mean by

"cat test.log | less --> last_modifying_cmd overrun"

in this context. How cat, or less, can affect or be affected by last_modifying_cmd?
 
(0007504)
Reiner
05-07-08 23:07
edited on: 05-07-08 23:08

 when I try the following command on the console
    cat test.log | less
it seems that less is started and tried to display the content of the file test.log.
But it dosn't show the content. I only see the line "last_modifying_cmd overrun" and I can not leave less again.
I do not know why busybox calls vi when I do this command.
 
(0007514)
vda
05-08-08 02:10

 Please run

cat test.log | strace -o less.log less

and show less.log contents
 
(0007524)
Reiner
05-08-08 03:41

 Here is the content:
This command is working and I can leave less.
==============================================
execve("/usr/bin/less", ["less"], [/* 11 vars */]) = 0
uname({sys="Linux", node="172.17.0.1", ...}) = 0
brk(0) = 0x10086000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x30015000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/tls/ppc8540/libcrypt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls/ppc8540", 0x7fe191b0) = -1 ENOENT (No such file or directory)
open("/lib/tls/libcrypt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls", 0x7fe191b0) = -1 ENOENT (No such file or directory)
open("/lib/ppc8540/libcrypt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/ppc8540", 0x7fe191b0) = -1 ENOENT (No such file or directory)
open("/lib/libcrypt.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0\t"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=22156, ...}) = 0
mmap(0xffb3000, 246400, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffb3000
mprotect(0xffb8000, 225920, PROT_NONE) = 0
mmap(0xffc7000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0xffc7000
mmap(0xffc9000, 156288, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffc9000
close(3) = 0
open("/lib/libm.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0VP"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=673260, ...}) = 0
mmap(0xfef0000, 732656, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xfef0000
mprotect(0xff92000, 69104, PROT_NONE) = 0
mmap(0xffa1000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xa1000) = 0xffa1000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\1\311"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1160332, ...}) = 0
mmap(0xfdc8000, 1145852, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xfdc8000
mmap(0xfed8000, 24576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x110000) = 0xfed8000
mmap(0xfede000, 7164, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfede000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x30016000
mprotect(0xfed8000, 4096, PROT_READ) = 0
mprotect(0xffa1000, 4096, PROT_READ) = 0
mprotect(0xffc7000, 4096, PROT_READ) = 0
mprotect(0x30024000, 4096, PROT_READ) = 0
getuid() = 0
brk(0) = 0x10086000
brk(0x100a7000) = 0x100a7000
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
open("/dev/tty", O_RDONLY) = 3
ioctl(0, TCGETS, 0x7fe19930) = -1 EINVAL (Invalid argument)
ioctl(3, TIOCGWINSZ, {ws_row=51, ws_col=138, ws_xpixel=4096, ws_ypixel=19080}) = 0
ioctl(3, TCGETS, {B38400 opost isig icanon echo ...}) = 0
rt_sigaction(SIGTERM, {0x1000bde4, [TERM], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {0x1000bde4, [INT], SA_RESTART}, {SIG_DFL}, 8) = 0
fcntl64(0, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(0, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(0, "#clean\n\necho \"opcontrol --shutdo"..., 8193) = 62
fcntl64(0, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
fcntl64(0, F_SETFL, O_RDONLY) = 0
fcntl64(0, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(0, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(0, "", 8193) = 0
fcntl64(0, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
fcntl64(0, F_SETFL, O_RDONLY) = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x30017000
write(1, "\33[0;0H\33[K#clean\n", 16) = 16
write(1, "\33[K\n", 4) = 4
write(1, "\33[Kecho \"opcontrol --shutdown .."..., 35) = 35
write(1, "\33[Kopcontrol --shutdown\n", 24) = 24
write(1, "\33[K\n", 4) = 4
write(1, "\33[K\n", 4) = 4
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[K~\n", 5) = 5
write(1, "\33[51;0H\33[K\33[7mstandard input\33[0m", 32) = 32
ioctl(3, TCSETS, {B38400 opost isig -icanon -echo ...}) = 0
select(4, [3], NULL, NULL, NULL) = 1 (in [3])
fcntl64(3, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(3, ":", 16) = 1
fcntl64(3, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
fcntl64(3, F_SETFL, O_RDONLY) = 0
ioctl(3, TCSETS, {B38400 opost isig icanon echo ...}) = 0
write(1, "\33[51;0H\33[K\33[7m :\33[0m", 20) = 20
ioctl(3, TCSETS, {B38400 opost isig -icanon -echo ...}) = 0
select(4, [3], NULL, NULL, NULL) = 1 (in [3])
fcntl64(3, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(3, "q", 16) = 1
fcntl64(3, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
fcntl64(3, F_SETFL, O_RDONLY) = 0
ioctl(3, TCSETS, {B38400 opost isig icanon echo ...}) = 0
write(1, "\n", 1) = 1
munmap(0x30017000, 4096) = 0
exit_group(0) = ?
 
(0007534)
vda
05-08-08 07:00

 It is very weird that "strace command" is different from just "command". I give up.
 
(0007554)
Reiner
05-09-08 00:44

 @vda, could you reproduce my problem?
 
(0007574)
vda
05-09-08 04:12

 No, it works for me. It seems that "less" is aliased to vi in your shell, or something like that. You need to investigate.

I suppose "cat file | /full/path/to/less" works? If yes, you definitely have shell alias problem.
 
(0007604)
Reiner
05-09-08 06:31

 "cat test.log | /usr/bin/less" is working fine.
Thanks for your help.
What should I do with this Issue? Do you close this ?
 
(0008144)
vda
06-07-08 17:40

 Peoprter has less aliased to vi by shell.
 

- Issue History
Date Modified Username Field Change
05-07-08 03:55 Reiner New Issue
05-07-08 03:55 Reiner Status new => assigned
05-07-08 03:55 Reiner Assigned To  => BusyBox
05-07-08 03:57 Reiner Issue Monitored: Reiner
05-07-08 05:22 vda Note Added: 0007464
05-07-08 23:07 Reiner Note Added: 0007504
05-07-08 23:08 Reiner Note Edited: 0007504
05-08-08 02:10 vda Note Added: 0007514
05-08-08 03:41 Reiner Note Added: 0007524
05-08-08 07:00 vda Note Added: 0007534
05-09-08 00:44 Reiner Note Added: 0007554
05-09-08 04:12 vda Note Added: 0007574
05-09-08 06:31 Reiner Note Added: 0007604
06-07-08 17:40 vda Status assigned => closed
06-07-08 17:40 vda Note Added: 0008144
06-07-08 17:40 vda Resolution open => fixed

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