05-14-2008
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
why does * highlight everything in it... shouldn't it only highlight capital letters? (0 Replies)
Discussion started by: brentdeback
0 Replies
2. UNIX for Dummies Questions & Answers
Hi - I am trying to ignore the following items from a list.
lp0
lp11
lp12
lp14
The following code works fine, but I was wondering if there was a tidier way to write the lp regular expression?
egrep -v "lp"
Thanks in advance. (3 Replies)
Discussion started by: Krispy
3 Replies
3. Shell Programming and Scripting
hi
i need to wipe out something from giving path i have some thing like that :
pwd | sed 's/.*foo//'
it is working fine when I have path like : /blah/balh1/foo/moo
so it erasing me all that comes before the foo including the foo
but I have problem when I have dir by the name of... (7 Replies)
Discussion started by: umen
7 Replies
4. UNIX for Dummies Questions & Answers
anyone knows what does this regular expression match for?
\(3,\).*\1.*\1 (1 Reply)
Discussion started by: metalwarrior
1 Replies
5. UNIX for Dummies Questions & Answers
Folks;
I have 3 questions & any help with them would be really appreciated:
If i have a list of directories, for example:
/fs/pas/2007/4/6/2634210/admdat/examin
/fs/pas/2007/4/6/2634210/admdat2/stat
/fs/pas/2007/4/6/2634210/admdat3/data
/fs/pas/2007/4/6/2634210/im_2/0b.dcm
Now; my... (6 Replies)
Discussion started by: Katkota
6 Replies
6. Shell Programming and Scripting
Hey all! what matching expression might I use to match all characters included in \W, EXCEPT < and > ?
for example:
@tokens=split(/ ???? /,$string);
I've dubiously tried \W but this clips off the first letter of each "token", for some reason ... (2 Replies)
Discussion started by: applefat
2 Replies
7. UNIX for Dummies Questions & Answers
I like to loop a list of files which named file1, file2, file3, file4, etc
if I like to loop them all over
for f in file1, file2, file3, file4
do
echo "processing" $f
done
how to use a regular expression to loop file$i instead?
Thank you. (4 Replies)
Discussion started by: ksgreen
4 Replies
8. Programming
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Discussion started by: jessy83
1 Replies
9. UNIX for Dummies Questions & Answers
Hello,
I'm trying to rename a bunch of files that were named incorrectly. I know a little about regular expressions but I'm not very good at them.
Here is the image of the file names:
http://i47.tinypic.com/np2gxi.jpg
I'm trying to change the 20111116 at the beginning to 20101116 for all... (2 Replies)
Discussion started by: nastyn8
2 Replies
10. UNIX for Dummies Questions & Answers
Hi guys,
I need a help with a query. Basically i want to know the difference between (0+01)* and ((0+01)*)* . It seems whatever string can be generated by the first RE can also be generated by second and they should essentially be same. Am i missing something? (1 Reply)
Discussion started by: srkmish
1 Replies
LEARN ABOUT LINUX
setegid
SETEUID(2) Linux Programmer's Manual SETEUID(2)
NAME
seteuid, setegid - set effective user or group ID
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
int seteuid(uid_t euid);
int setegid(gid_t egid);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
seteuid(), setegid():
_BSD_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
DESCRIPTION
seteuid() sets the effective user ID of the calling process. Unprivileged user processes may only set the effective user ID to the real
user ID, the effective user ID or the saved set-user-ID.
Precisely the same holds for setegid() with "group" instead of "user".
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM The calling process is not privileged (Linux: does not have the CAP_SETUID capability in the case of seteuid(), or the CAP_SETGID
capability in the case of setegid()) and euid (respectively, egid) is not the real user (group) ID, the effective user (group) ID,
or the saved set-user-ID (saved set-group-ID).
CONFORMING TO
4.3BSD, POSIX.1-2001.
NOTES
Setting the effective user (group) ID to the saved set-user-ID (saved set-group-ID) is possible since Linux 1.1.37 (1.1.38). On an arbi-
trary system one should check _POSIX_SAVED_IDS.
Under libc4, libc5 and glibc 2.0 seteuid(euid) is equivalent to setreuid(-1, euid) and hence may change the saved set-user-ID. Under glibc
2.1 and later it is equivalent to setresuid(-1, euid, -1) and hence does not change the saved set-user-ID. Similar remarks hold for sete-
gid().
According to POSIX.1, seteuid() (setegid()) need not permit euid (egid) to be the same value as the current effective user (group) ID, and
some implementations do not permit this.
SEE ALSO
geteuid(2), setresuid(2), setreuid(2), setuid(2), capabilities(7), credentials(7)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2009-10-17 SETEUID(2)