I am experiencing the strangest problem. Performing `chmod g+w` on a directory causes a script inside it not to execute anymore. I'm lost. The reason I am mailing to the ext3 list is I use ext3 on the partition where the problem arise. And that I have concluded that it probably is the ext3 file system that give this unusual behaviour.... But I am an error prone person so... it might be something else causing this. Glad if any of you file system experts could direct me further. Thanks a lot. Anyways, here it goes: 9:43:03 markus ~>echo $USER markus 9:43:31 markus ~>pwd /home/markus 9:43:34 markus ~>l | grep test drwxr-xr-x 2 root users 4096 May 29 20:44 test/ 9:43:37 markus ~>cd test/ 9:43:47 markus ~/test>l total 4 -rwxr-xr-x 1 root root 24 May 29 20:44 myTest* 9:43:50 markus ~/test>cat myTest #!/bin/sh echo testing 9:43:53 markus ~/test>./myTest testing 9:43:55 markus ~/test> So we see that the script is working. I then perform the change logged in as root in another terminal. 9:43:14 root ~markus>echo $USER root 9:44:19 root ~markus>chmod g+w test/ 9:44:25 root ~markus>which chmod /bin/chmod 9:44:27 root ~markus> Then I continue in the first terminal as user markus: 9:44:07 markus ~/test>echo $USER markus 9:44:40 markus ~/test>l .. | grep test drwxrwxr-x 2 root users 4096 May 29 20:44 test/ 9:44:49 markus ~/test>l total 4 -rwxr-xr-x 1 root root 24 May 29 20:44 myTest* 9:44:52 markus ~/test>./myTest ./myTest: Permission denied. 9:45:06 markus ~/test> I tried to change the contents of the script to using #!/bin/tcsh instead, but no result. I might add that the user root has no problem executing the script: 9:51:21 root ~markus/test>echo $USER root 9:51:22 root ~markus/test>l .. | grep test drwxrwxr-x 2 root users 4096 May 30 09:50 test/ 9:51:25 root ~markus/test>l total 4 -rwxr-xr-x 1 root root 24 May 30 09:50 myTest* 9:51:28 root ~markus/test>./myTest testing 9:51:34 root ~markus/test> The user markus is in the group users. So I thought the script might execute if I removed the user from that group with the command: usermod -G markus,adm,wheel,rpm,xgrp,ntools,ctools markus But when I try again: 9:56:42 markus ~/test>echo $USER markus 9:56:44 markus ~/test>groups markus adm wheel rpm xgrp ntools ctools 9:56:46 markus ~/test>l .. | grep test drwxrwxr-x 2 root users 4096 May 30 09:50 test/ 9:56:51 markus ~/test>l total 4 -rwxr-xr-x 1 root root 24 May 30 09:50 myTest* 9:56:54 markus ~/test>./myTest ./myTest: Permission denied. 9:56:56 markus ~/test> Which is really strange now, because when I switch back the permission for the directory, the 'W' flag for the group permission of the directory with the command chmod g+w test/ that is a command that should have no effect on the user markus as it is not a member of the group users... : 10:01:54 markus ~/test>echo $USER markus 10:02:03 markus ~/test>groups markus adm wheel rpm xgrp ntools ctools 10:02:07 markus ~/test>l .. | grep test drwxrwxr-x 2 root users 4096 May 30 09:50 test/ 10:02:09 markus ~/test>l total 4 -rwxr-xr-x 1 root root 24 May 30 09:50 myTest* 10:02:11 markus ~/test>./myTest ./myTest: Permission denied. 10:02:12 markus ~/test> I also tried to recreate the script file by being really careful to not intriduce any non printable characters (I used vi and the keyboard, not using any paste operation), still the same behaviour. I am running Mandrake 9.1. I am not sure the problem lies in chmod. If it isn't, it would be the file system. Or it could be that something in the script (echo or /bin/sh) really need write access to the directory. But then again my last test contradicts that hypothesis. Anyways, removing the echo command from the script: 10:09:39 markus ~/test>cat myTest #!/bin/sh #echo testing 10:09:41 markus ~/test> also gives no result. As the filesystem is ext3 I thought there might be something wrong hidden, but no (if I interpret lsattr output correctly): 14:14:38 markus ~>lsattr | grep test ------------- ./test 14:14:47 markus ~>cd test/ 14:16:46 markus ~/test>lsattr ------------- ./myTest 14:16:48 markus ~/test> Is there a workaround? The contents of my /etc/fstab is: 20:51:31 markus ~>cat /etc/fstab /dev/hda1 / ext3 defaults 1 1 none /dev/pts devpts mode=0620 0 0 /dev/hda7 /home ext3 defaults 1 2 /dev/scd0 /mnt/cdrom auto user,iocharset=iso8859-1,codepage=850,noauto,ro,exec 0 0 /dev/hdd /mnt/cdrom2 auto user,iocharset=iso8859-1,codepage=850,noauto,ro,exec 0 0 /dev/hda8 /mnt/film ext3 defaults 1 2 /dev/hdb1 /mnt/film2 ext3 defaults 1 2 /dev/fd0 /mnt/floppy auto user,iocharset=iso8859-1,sync,codepage=850,noauto,exec 0 0 none /proc proc defaults 0 0 /dev/hda6 /usr ext3 defaults 1 2 /dev/hda5 swap swap defaults 0 0 20:51:32 markus ~> /Markus Mvh, Markus _______________________________________________ Ext3-users@redhat.com https://www.redhat.com/mailman/listinfo/ext3-users
