11-09-2011
What have you tried so far? Is this homework?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
In my script i am writing to a counter file the no of processes i had started,
that is each time i start a process, i will increment the content of counter file and also when the process ends i will decrement the content of the file.
after this i do some other activities, by now i want to... (1 Reply)
Discussion started by: senthilk615
1 Replies
2. Shell Programming and Scripting
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
Discussion started by: halo98
1 Replies
3. Post Here to Contact Site Administrators and Moderators
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS:... (0 Replies)
Discussion started by: adityam
0 Replies
4. Shell Programming and Scripting
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS: SINGCORP invalid... (1 Reply)
Discussion started by: adityam
1 Replies
5. UNIX for Dummies Questions & Answers
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS: SINGCORP invalid... (1 Reply)
Discussion started by: adityam
1 Replies
6. UNIX for Dummies Questions & Answers
Hi,
I have reached at a specified offset from the start of file. My requirement is that I want to read only those lines, which have the string READ / ALTER / UPDATE. As soon as, none of these literals are found in the subsequent line, I want to stop reading. Is there any feature of grep which... (1 Reply)
Discussion started by: saurabhsinha23
1 Replies
7. Shell Programming and Scripting
Hi all
i have a file like
2006,1,2
2007,2,3
2008,3,4
I will read this and my output should be like
2006,1,2
2007,1,2
2008,1,2
2007,2,3
2008,2,3
2008,3,4
Giving the explanation, we will read the first line of the file and if the year any other than current year, we will print as many... (1 Reply)
Discussion started by: vasuarjula
1 Replies
8. Shell Programming and Scripting
Hi ,
I have a CSV file ( file.csv) with some data as
below:
A,1,abc,x,y,z,,xyz,20100101,99991231
A,1,abc,x,y,z,234,xyz,20100101,99991231
I have to delete the duplicate line based on
unique identifiers which are values in the
fields- 2,3,4,8.These coulmns in both the rows
have same... (6 Replies)
Discussion started by: Sheel
6 Replies
9. Shell Programming and Scripting
I need help with extract/print lines till stop pattern. This needs to happen after every 3rd occurrence of start pattern and continue till end of file. Consider below is an example of the log file. my start pattern will be every 3rd occurrence of ERROR_FILE_NOT_FOUND and stop pattern will be... (5 Replies)
Discussion started by: NSS
5 Replies
10. Shell Programming and Scripting
Hi All,
I have one query, I managed to run script with user inputs through command line or with 1 file.
But I need to read a txt file/xml file in which user can mention multiple sets of answers and script should run for each set till it reach the EOF.
Thanks in advance
for example, the file... (3 Replies)
Discussion started by: rv_champ
3 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)