SUID bit???

Thread Tools Search this Thread
Top Forums Programming SUID bit???
# 1  
Old 09-28-2001
Question SUID bit???

Hi all

I'm getting file info through stat( char *filename, struct stat *buf)

Taking all the file attributes to buf->st_mode,
How can i check the suid bit in there, if suid bit mask is 0004000??

Thank you all
# 2  
Old 09-28-2001
Use the symbolic name rather than the octal constant. And use a bitwise "and":

if (buf->stmode & S_ISUID) {
     printf{"suid bit set\n");
} else {
     printf("suid bit clear\n");

Some people don't like that form and think this is more clear:
if ((buf->stmode & S_ISUID) == S_ISUID)
Login or Register to Ask a Question

Previous Thread | Next Thread

6 More Discussions You Might Find Interesting

1. Windows & DOS: Issues & Discussions

Which version of Windows Vista to install with a product key? 32-bit or 64-bit?

Hello everyone. I bought a dell laptop (XPS M1330) online which came without a hard drive. There is a Windows Vista Ultimate OEMAct sticker with product key at the bottom case. I checked dell website (here) for this model and it says this model supports both 32 and 64-bit version of Windows... (4 Replies)
Discussion started by: milhan
4 Replies

2. UNIX for Dummies Questions & Answers

Difference between inbuilt suid programs and user defined root suid programs under bash shell?

Hey guys, Suppose i run passwd via bash shell. It is a suid program, which temporarily runs as root(owner) and modifies the user entries. However, when i write a C file and give 4755 permission and root ownership to the 'a.out' file , it doesn't run as root in bash shell. I verified this by... (2 Replies)
Discussion started by: syncmaster
2 Replies

3. Shell Programming and Scripting

How to handle 64 bit arithmetic operation at 32 bit compiled perl interpreter?H

Hi, Here is the issue. From the program snippet I have Base: 0x1800000000, Size: 0x3FFE7FFFFFFFF which are of 40 and 56 bits. SO I used use bignum to do the math but summing them up I always failed having correct result. perl interpreter info, perl, v5.8.8 built for... (0 Replies)
Discussion started by: rrd1986
0 Replies

4. UNIX for Dummies Questions & Answers

find files with SUID bit turned on

I'm writing a script that will search for files with the SUID bit turned on, and put the list in a file called id.txt i read that files with the SUID bit turned on are chmod'd to 4000, so i tried: find / -perm 4000 > id.txt also various others such as -perm 4777 etc etc but it found nothing... (1 Reply)
Discussion started by: SoVi3t
1 Replies

5. UNIX for Dummies Questions & Answers

what is SUID,GUID and Sticky bit?

Dear all, what is SUID,GUID and Sticky bit permission? can anyone gave me explanation with example? thanks in advance.. (2 Replies)
Discussion started by: masthan25
2 Replies

6. Programming

copying or concatinating string from 1st bit, leaving 0th bit

Hello, If i have 2 strings str1 and str2, i would like to copy/concatenate str2 to str1, from 1st bit leaving the 0th bit. How do i do it? (2 Replies)
Discussion started by: jazz
2 Replies
Login or Register to Ask a Question