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09.24.2008 at 07:00AM PDT, ID: 23758632
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7.4

Mimicking keyboard input in shell script

Asked by cduke250 in Bourne-Again Shell (bash), Bourne Shell (sh), KornShell (ksh)

Tags:

II have a password creation binary that runs from the shell, and prompts the user for a password.  MY question is, how can I enter a password without typing it?  Stdin redirection?  I can also use perl, php, ksh, sh, and most unix utils like read.



Here is the strace of the program asking for a new password twice.

open("/dev/tty", O_RDWR|O_CREAT|O_TRUNC, 0666) = 4
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_CONTINUE or TCSETSF, {B38400 opost -isig icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
fstat64(4, {st_mode=S_IFCHR|0666, st_rdev=makedev(5, 0), ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fdc000
write(4, "New password: ", 14New password: )          = 14
read(4, "\n", 4096)                     = 1
write(4, "\n", 1
)                       = 1
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_CONTINUE or TCSETSF, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
close(4)                                = 0
munmap(0xb7fdc000, 4096)                = 0
open("/dev/tty", O_RDWR|O_CREAT|O_TRUNC, 0666) = 4
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_CONTINUE or TCSETSF, {B38400 opost -isig icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
fstat64(4, {st_mode=S_IFCHR|0666, st_rdev=makedev(5, 0), ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fdc000
write(4, "Re-type new password: ", 22Re-type new password: )  = 22
read(4, "\n", 4096)                     = 1
write(4, "\n", 1
)                       = 1
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_CONTINUE or TCSETSF, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
close(4)                                = 0
munmap(0xb7fdc000, 4096)                = 0

read(4,
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[+][-]09.24.2008 at 07:01AM PDT, ID: 22559768

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[+][-]09.24.2008 at 07:18AM PDT, ID: 22559956

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About this solution

Zones: Bourne-Again Shell (bash), Bourne Shell (sh), KornShell (ksh)
Tags: Bash
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Solution Provided By: omarfarid
Participating Experts: 1
Solution Grade: B
 
 
[+][-]09.24.2008 at 02:15PM PDT, ID: 22564110

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[+][-]09.24.2008 at 05:54PM PDT, ID: 22565382

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[+][-]10.01.2008 at 08:30AM PDT, ID: 22615448

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[+][-]10.16.2008 at 01:15PM PDT, ID: 22735281

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