I have been searching around the forums here trying to find a solution to my problem but not getting anywhere but closer to baldness.
I have a 20 column pipe "|" seperated text file. The 14th variable doesnt always exist, but will have the format of YYYYMM or YYYY if it does.
I need to take... (2 Replies)
Hi all-
I've been fooling with this for a few days, but I'm rather new at this...
I have a bash variable containing a long string of various characters, for instance:
JUNK=this that the other xyz 1234 56 789
I don't know what "xyz" actually is, but I know that:
START=he other
and ... (2 Replies)
Hello,
I wonder if it is possible to pass and use variables from shell environment into sed or awk. I am trying to achieve something similar to the following using sed or awk:
var=some_regular_expression
grep "$var" filename # Will extract lines from filename
The following code,... (3 Replies)
Hello,
I read and search through this wonderful forum and tried different approaches but it seems I lack some knowledge and neurones ^^
Here is what I'm trying to achieve :
file1:
test filea 3495;
test fileb 4578;
test filec 7689;
test filey 9978;
test filez 12300;
file2:
test filea... (11 Replies)
Can I use my own variables within awk and sed for example:
I've written a while loop with a counter $i and I want to use the value of $i within sed and awk to edit certain lines of text within a data file.
I want to use :
sed '1s/$/texthere/g' data.csv
Like this:
sed '$is/$/$age/g' data.csv... (5 Replies)
I have an extremely large csv file that I need to search the second field, and upon matches update the last field...
I can pull the line with awk.. but apparently you cant use awk to directly update the file? So im curious if I can use sed to do this... The good news is the field I want to... (5 Replies)
ok, this definitely falls in the n00b category... I'm trying to upgrade Java on my server and just need to update the PATH, CLASSPATH, and JAVA_HOME environment variables.
This is what they currently are:... (4 Replies)
I am trying to print text between two variables in a file
I have tried the following things but none seem to work:
awk ' /'$a'/ {flag=1;next} /'$b'/{flag=0} flag { print }' file
and also
sed "/$a/,/$b/p" file
But none seem to work
Any Ideas?
Thanks in Advance (5 Replies)
Hello I am hoping you may help.
I am not sure how to go about this exactly, I know the tools but not sure how to make them work together.
I have two SED commands that I would like to run in a shell script. I would like to take
the manual input of a user (types in when prompted) to be used... (4 Replies)
Hi,
After looking at the differents post on this forum, I am convinced that I will benefit from the experience of advanced Unix user on some script I have already done for an aeronautical study. Here is one of them :
Step 1 :
sed -e "s/??/00/g" Base_Awk.txt > Awk_Cut_00.txt4;
sed... (11 Replies)
Discussion started by: Marc_Camoc
11 Replies
LEARN ABOUT FREEBSD
ctr0
KTR(9) BSD Kernel Developer's Manual KTR(9)NAME
CTR0, CTR1, CTR2, CTR3, CTR4, CTR5 -- kernel tracing facility
SYNOPSIS
#include <sys/param.h>
#include <sys/ktr.h>
extern int ktr_cpumask;
extern int ktr_entries;
extern int ktr_extend;
extern int ktr_mask;
extern int ktr_verbose;
extern struct ktr_entry ktr_buf[];
void
CTR0(u_int mask, char *format);
void
CTR1(u_int mask, char *format, arg1);
void
CTR2(u_int mask, char *format, arg1, arg2);
void
CTR3(u_int mask, char *format, arg1, arg2, arg3);
void
CTR4(u_int mask, char *format, arg1, arg2, arg3, arg4);
void
CTR5(u_int mask, char *format, arg1, arg2, arg3, arg4, arg5);
void
CTR6(u_int mask, char *format, arg1, arg2, arg3, arg4, arg5, arg6);
DESCRIPTION
KTR provides a circular buffer of events that can be logged in a printf(9) style fashion. These events can then be dumped with ddb(4),
gdb(1) or ktrdump(8).
Events are created and logged in the kernel via the CTRx macros. The first parameter is a mask of event types (KTR_*) defined in
<sys/ktr.h>. The event will be logged only if any of the event types specified in mask are enabled in the global event mask stored in
ktr_mask. The format argument is a printf(9) style format string used to build the text of the event log message. Following the format
string are zero to five arguments referenced by format. Each event is logged with a file name and source line number of the originating CTR
call, and a timestamp in addition to the log message.
The event is stored in the circular buffer with supplied arguments as is, and formatting is done at the dump time. Do not use pointers to
the objects with limited lifetime, for instance, strings, because the pointer may become invalid when buffer is printed.
Note that the different macros differ only in the number of arguments each one takes, as indicated by its name.
The ktr_entries variable contains the number of entries in the ktr_buf array. These variables are mostly useful for post-mortem crash dump
tools to locate the base of the circular trace buffer and its length.
The ktr_mask variable contains the run time mask of events to log.
The CPU event mask is stored in the ktr_cpumask variable.
The ktr_verbose variable stores the verbose flag that controls whether events are logged to the console in addition to the event buffer.
EXAMPLES
This example demonstrates the use of tracepoints at the KTR_PROC logging level.
void
mi_switch()
{
...
/*
* Pick a new current process and record its start time.
*/
...
CTR3(KTR_PROC, "mi_switch: old proc %p (pid %d)", p, p->p_pid);
...
cpu_switch();
...
CTR3(KTR_PROC, "mi_switch: new proc %p (pid %d)", p, p->p_pid);
...
}
SEE ALSO ktr(4), ktrdump(8)HISTORY
The KTR kernel tracing facility first appeared in BSD/OS 3.0 and was imported into FreeBSD 5.0.
BUGS
Currently there is one global buffer shared among all CPUs. It might be profitable at some point in time to use per-CPU buffers instead so
that if one CPU halts or starts spinning, then the log messages it emitted just prior to halting or spinning will not be drowned out by
events from the other CPUs.
The arguments given in CTRx() macros are stored as u_long, so do not pass arguments larger than size of an u_long type. For example passing
64bit arguments on 32bit architectures will give incorrect results.
BSD November 30, 2008 BSD