Setuid not working in Linux as script fails to write to file. Post: 302826063

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Need to write a home-grown backup script for Linux

I am researching ways in which to backup files or whole file systems for backup to another system. We are using Suse Linux 7.0 with no tape backup devices or secondary disks. What utilities would be the best to use for a simple yet flexible script for backup purposes? tar, cpio, compress.

2. Shell Programming and Scripting

log file when the script fails !

i have a script that will retrive some info from database. The script is working fine but i have to add new feature in it when the script fails or retrive null result it should reflect in the log file. below the script AMR_Inactive.sh while read i do connect1=`sqlplus -silent...

3. IP Networking

read/write,write/write lock with smbclient fails

Hi, We have smb client running on two of the linux boxes and smb server on another linux system. During a backup operation which uses smb, read of a file was allowed while write to the same file was going on.Also simultaneous writes to the same file were allowed.Following are the settings in the...

4. UNIX for Advanced & Expert Users

when a process fails to write to /dev/log

Hi , when a process fails to write to /dev/log ?

5. UNIX for Dummies Questions & Answers

a problem with write a script in Linux version 2.4.27-ubnt0

Hello everyone, I have a radio wireless called UBNT Nanostation5 It has this linux OS:Linux version 2.4.27-ubnt0 When i want to write a script in ssh, i get some errors The script is: ifconfig eth0 down ifconfig eth0 hw ether 00:15:6D:**:**:** ifconfig eth0 up cfg -x echo...

6. Shell Programming and Scripting

Need help! command working ok when executed in command line, but fails when run inside a script!

Hi everyone, when executing this command in unix: echo "WM7 Fatal Alerts:", $(cat query1.txt) > a.csvIt works fine, but running this command in a shell script gives an error saying that there's a syntax error. here is content of my script: tdbsrvr$ vi hc.sh "hc.sh" 22 lines, 509...

7. Red Hat

process fails if setuid bit is set

Hi, OS : Linux I have an executable (P1) owned by user say "abcd" and the setuid bit is set. And there is another executable (P2) which brings up the process (P1). When the setuid bit is set, the process P1 is failing, if the setuid bit is not set there is no issue. I was wondering if...

8. UNIX for Beginners Questions & Answers

Linux shell | how to exit a script if any command fails.

Hi, i am new here let me say HI for all. now i have a question please: i am sending one command to my machine to create 3 names. if one of the names exists then the box return error message that already have the name but will continue to create the rests. How i can break the command and...

9. UNIX for Beginners Questions & Answers

What keeps me from abusing setuid(0) and programs with setuid bit set?

Just learning about the privilege escalation method provided by setuid. Correct me if I am wrong but what it does is change the uid of the current process to whatever uid I set. Right ? So what stops me from writing my own C program and calling setuid(0) within it and gaining root privileges ? ...

LEARN ABOUT OPENSOLARIS

setusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

	 /bin/bash		    /bin/csh
	 /bin/jsh		    /bin/ksh
	 /bin/ksh93		    /bin/pfcsh
	 /bin/pfksh		    /bin/pfsh
	 /bin/sh		    /bin/tcsh
	 /bin/zsh		    /sbin/jsh
	 /sbin/pfsh		    /sbin/sh
	 /usr/bin/bash		    /usr/bin/csh
	 /usr/bin/jsh		    /usr/bin/ksh
	 /usr/bin/ksh93 	    /usr/bin/pfcsh
	 /usr/bin/pfksh 	    /usr/bin/pfsh
	 /usr/bin/sh		    /usr/bin/tcsh
	 /usr/bin/zsh		    /usr/sfw/bin/zsh
	 /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

NOTES

       Restricted shells should not be listed in /etc/shells.

SunOS 5.11							    1 Nov 2007							  getusershell(3C)