Clearly the results vary considerably from system to system. I upped my input test file to 1,000,000 lines and ran each set of code 11 times. I threw out the 1st run for each awk script. The remaining results on my system are:
On OS X, awk using index() 4 times and substr() 5 times seems to be a little slower than using match() 2 times and substr() 2 times. Both are considerably faster than using split() and a for loop to append fields to create the concatenation of the 4th through the NFth fields.
This User Gave Thanks to Don Cragun For This Post:
Hi,
I'm writing a shell script that outputs, among other things, some of the information that is outputted by the mysqladmin status command.
The output of the command looks like this:
Uptime: 816351 Threads: 19 Questions: 80719739 Slow queries: 1419 Opens: 15903523 Flush tables: 1 Open tables:... (6 Replies)
I am passing argument 1-13 to a sh file.
I want to parse the string and the get the numbers on either side of "-" in two different variables.
I am not familiar with unix .. how can i do this? (3 Replies)
Hey guys,
I have this file generated by me... i want to create some HTML output from it.
The problem is that i am really confused about how do I go about reading the file.
The file is in the following format:
TID1 Name1 ATime=xx AResult=yyy AExpected=yyy BTime=xx BResult=yyy... (8 Replies)
If I have a string that has some name followed by an ID#(ex.B123456) followed by some more #'s and/or letters, would it be possible to just grab the ID portion of this string? If so how? I am pretty new with these text tools so any help is appreciated.
Example:
"Name_One-B123456A-12348A" (2 Replies)
Hallo
I have maybe a little bit advanced request....
I need to choose one random part betwen %....
so i have this..
%
text1 text1 text1
text1 text1 text1
text1 text1 text1
%
text2 text2
text2 text2 text2
%
text3 text3 text3
tetx3
%
this choose text between %
awk ' /%/... (8 Replies)
hello forum members
I have txt file which consists the following information.
Server: abababa.xyz.ap.mxmx.com
Address: 111.143.211.202
Name: rmxd.ipc.ap.mxmx.com
Address: 144.111.99.9
from the abovefile i have to extract only string "rmxd.ipc.ap.mxmx.com" through awk command.... (1 Reply)
Hi everyone,
I am working on fetchmail + procmail to filter mails and I am having problem with parsing a long line in the body of the email.
Could anyone help me construct a reg exp for this string below. It needs to match exactly as this string.
GetRyt... (4 Replies)
Hi all.
I have the following command that is successfully searching for any one of the strings on all lines of a file and replacing it with the instructed value.
cat inputFile | awk '{gsub(/aaa|bbb|ccc|ddd/,"1234")}1' > outputFile
This does in fact replace any occurrence of aaa, bbb,... (2 Replies)
I have 1.6 GB (and growing) of files with needed data between the 11th and 34th line (inclusive) of the second column of comma delimited files. There is also a lot of stray white space in the file that needs to be trimmed. They have DOS-like end of lines.
I need to transpose the 11th through... (13 Replies)
I am trying to use awk to change a specific string in a field, if it is found, to another value. In the tab-delimited file the text in bold in $3 contains the string 23, which is always right before a ., if it is present.
I am trying to change that string to X, keeping the formatting and the... (3 Replies)
Discussion started by: cmccabe
3 Replies
LEARN ABOUT MOJAVE
setuid
SETUID(2) BSD System Calls Manual SETUID(2)NAME
setegid, seteuid, setgid, setuid -- set user and group ID
SYNOPSIS
#include <unistd.h>
int
setegid(gid_t egid);
int
seteuid(uid_t euid);
int
setgid(gid_t gid);
int
setuid(uid_t uid);
DESCRIPTION
The setuid() function sets the real and effective user IDs and the saved set-user-ID of the current process to the specified value. The
setuid() function is permitted if the effective user ID is that of the super user, or if the specified user ID is the same as the effective
user ID. If not, but the specified user ID is the same as the real user ID, setuid() will set the effective user ID to the real user ID.
The setgid() function sets the real and effective group IDs and the saved set-group-ID of the current process to the specified value. The
setgid() function is permitted if the effective user ID is that of the super user, or if the specified group ID is the same as the effective
group ID. If not, but the specified group ID is the same as the real group ID, setgid() will set the effective group ID to the real group
ID.
The seteuid() function (setegid()) sets the effective user ID (group ID) of the current process. The effective user ID may be set to the
value of the real user ID or the saved set-user-ID (see intro(2) and execve(2)); in this way, the effective user ID of a set-user-ID exe-
cutable may be toggled by switching to the real user ID, then re-enabled by reverting to the set-user-ID value. Similarly, the effective
group ID may be set to the value of the real group ID or the saved set-user-ID.
RETURN VALUES
Upon success, these functions return 0; otherwise -1 is returned.
If the user is not the super user, or the uid specified is not the real, effective ID, or saved ID, these functions return -1.
ERRORS
The setegid(), seteuid(), setgid(), and setuid() system calls will fail if:
[EINVAL] The value of the {group,user} ID argument is invalid and is not supported by the implementation.
[EPERM] The process does not have appropriate privileges and the ID argument does not match the real ID or the saved
set-{group,user}-ID.
LEGACY SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
The include file <sys/types.h> is necessary for all functions.
SEE ALSO getgid(2), getuid(2), compat(5)STANDARDS
The setuid() and setgid() functions are compliant with the ISO/IEC 9945-1:1990 (``POSIX.1'') specification with _POSIX_SAVED_IDS defined,
with the extensions allowed in section B.4.2.2. The seteuid() and setegid() functions are extensions based on the POSIX concept of
_POSIX_SAVED_IDS, and have been proposed for a future revision of the standard.
4.2 Berkeley Distribution June 4, 1993 4.2 Berkeley Distribution