Good idea! Unfortunately it also does not work, and I suspect the root of the
problem
is a bug in /usr/sbin/pkgrm command. Here is the output:
# printf "y\ny\n"
y
y
# printf "y\ny\n" | pkgrm SPROprfnx
The following package is currently installed:
SPROprfnx Sun Studio 12 Non-ship 64-bit commands for Performance Analyzer
(i386) 12.0,REV=2007.10.30
Do you want to remove this package? [y,n,?,q]
## Removing installed package instance <SPROprfnx>
This package contains scripts which will be executed with super-user
permission during the process of removing this package.
Do you want to continue with the removal of this package [y,n,?,q]
Removal of <SPROprfnx> failed.
No changes were made to the system.
#
I run it under truss, and it shows that the problem is that pkgrm asks first
question,
then reads both answers, and then creates a child process
("/usr/sadm/install/bin/pkgremove"),
that will ask second question:
# printf "y\ny\n" > /tmp/yes.txt
# truss -a -e -f -o /tmp/pkgrm.tr pkgrm SPROprfnx < /tmp/yes.txt
# cat /tmp/pkgrm.tr
...
12580: read(0, " y\n y\n", 4096) = 4
12580: getuid() = 0 [0]
12580: zone_lookup("") = 0
12580: zone_getattr(0, ZONE_ATTR_NAME, 0x0804608C, 64) = 7
12580: schedctl() = 0xFE897000
12580: lwp_sigmask(SIG_SETMASK, 0x00000002, 0x00000000) = 0xFFBFFEFF
[0x0000FFFF]
12580: lwp_sigmask(SIG_SETMASK, 0x00000003, 0x00000000) = 0xFFBFFEFF
[0x0000FFFF]
12580: lwp_sigmask(SIG_SETMASK, 0xFFBFFEFF, 0x0000FFFF) = 0x00000003
[0x00000000]
12580: vfork() = 12585
12585: vfork() (returning as child ...) = 12580
...
12585: execve("/usr/sadm/install/bin/pkgremove", 0x080464E0, 0x08047B58) argc
= 8
12585: argv: /usr/sadm/install/bin/pkgremove -O
12585: parent-zone-name=global -O parent-zone-type=global -N pkgrm
12585: SPROprfnx
...
12585: write(2, "\n", 1) = 1
12585: xstat(2, "/usr/lib/locale/C/LC_CTYPE/wdresolve.so", 0x08044A68) Err#2
ENOENT
12585: write(2, " T", 1) = 1
12585: write(2, " h", 1) = 1
12585: write(2, " i", 1) = 1
12585: write(2, " s", 1) = 1
12585: write(2, " ", 1) = 1
...
12585: write(2, " n", 1) = 1
12585: write(2, " ,", 1) = 1
12585: write(2, " ?", 1) = 1
12585: write(2, " ,", 1) = 1
12585: write(2, " q", 1) = 1
12585: write(2, " ]", 1) = 1
12585: write(2, " ", 1) = 1
12585: ioctl(0, TCGETA, 0x08046284) Err#25 ENOTTY
12585: fstat64(0, 0x080462B0) = 0
12585: brk(0x080FD090) = 0
12585: brk(0x080FF090) = 0
12585: fstat64(0, 0x080461F0) = 0
12585: read(0, 0x080FC1E4, 4096) = 0
Obviously at this moment there is no way to get "y" from the input file.
A suggested fix is to read only one line in /usr/sbin/pkgrm, when it needs
an answer on its first question.
Thanks,
Nik
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