I think you should look at time spent in calls. gettimeofday is one of the least expensive system calls there is.
Steps to do what you asked
1. create your own shared library, call it mylib.so
You do this by writing a do-nthing call:
compile it as a shared library.
2. change your environment variables:
add
When you run the application it will load YOUR version of gettimeofday.
1. it may not work in secure environments like selinux because you are hijacking a syscall.
2. it will not work with setuid or setgid executables
i have a script, which is continuously looping. i want to view the script name when i use ps command... it is only showing -sh ...
UID PID PPID C STIME TTY TIME COMMAND
informix 8533 20923 0 18:19:28 pts/ta 0:00 -sh
but i dont have my scriptname displayed .... how can i do that my script is... (0 Replies)
hi guys i am new to UNIX and i am very much excited to learn how it works.. i was very confused with how to start and what book to follow so i went to my lecturer and asked him if he could suggest something. he advised me to get this book
Your UNIX: The Ultimate Guide by "Sumitabha Das"
ISBN:... (4 Replies)
hi i want solution regarding usage of array. i m having code which is written using if-
elif and can i use or access using arrays.
here i wana use array values along with if -elif condition. i dnt wana use command line argument
parameter1=(scram no_scram)
if ; then
... (0 Replies)
Hi
To delete some text in 2 files in line1 ( not complete line) in unix without opening the files.
For example: source file is like this
<?xml version="1.0"... (5 Replies)
--------------------------------------------------------------------------------
hy guys,
i got few interview questions i need someone to answer urgently:
1)If you cant get to the root, you try to fsck it, but gets errors to read file systems. What steps do you take to recover the host... (1 Reply)
Hello Friends,
I am a Graduate in Computers. I completed BCA degree this year. I want to make my career in UNIX. But, unfortunately I don't know anybody who can guide me. I am totally confuse because I don't know where to start and what are the future prospect in UNIX.
Please give your... (4 Replies)
Hi,
I have a small grepping problem in my script.I am having a file from which i need to make sure "#^A17" is the last updation (Next # can be ignored) before ################.The idea behind this is, if this file contains "A17" as the last updation, i need to do a particular activity. please... (7 Replies)
The following bash script does not work because the java/groovy code always thinks there are four arguments even if there are only 1 or 2. As you can see from my hideous backslashes, I am using cygwin bash on windows.
export... (1 Reply)
Hi Gurus,
I need to build a wrapper script which will be passing the loading date and the data file name (provides option to the user to load a single data file or load all the data files) to the actual loader data_load.ksh to load in the database.
1. I want to execute the loader script... (6 Replies)
Hi ,
seq can be 0...128
int windex = seq / 8;
int bindex = seq % 8;
unsigned char bitvalue = '\x01' << (7-bindex) ;
bpv.bitmapvalue = bitvalue;
This is the part of a program to convert decimal to bitmap value of hexadecimal.
I want this to change to convert only to... (1 Reply)
Discussion started by: greenworld123
1 Replies
LEARN ABOUT HPUX
gettimeofday
gettimeofday(2) System Calls Manual gettimeofday(2)NAME
gettimeofday - get the date and time
SYNOPSIS DESCRIPTION
The function obtains the current time, expressed as seconds and microseconds since Epoch, and stores it in the structure pointed to by tp.
The resolution of the system clock is one microsecond.
PARAMETERS
Programs should use this time zone information only in the absence of the environment variable.
tp A pointer to a structure in which the current time is returned.
The structure includes the following members:
tzp If this parameter is not a null pointer, it is interpreted as a pointer to a structure under HP-UX. The structure has the following
fields:
tz_minuteswest The number of minutes that the local time zone is west of Coordinated Universal Time (UTC) or Epoch.
tz_dsttime A flag that, if nonzero, indicates that Daylight Savings Time (DST) applies locally during the appropriate part of the
year.
RETURN VALUE
returns the following values under HP-UX:
Successful completion.
Failure.
is set to indicate the error.
ERRORS
If fails, is set to the following value under HP-UX:
[EFAULT] An argument address referenced invalid memory.
EXAMPLES
The following HP-UX example calls twice. It then computes the lapsed time between the calls in seconds and microseconds and stores the
result in a timeval structure:
WARNINGS
Relying on a granularity of one microsecond may result in code that is not portable to other platforms.
AUTHOR
was developed by the University of California, Berkeley, and HP.
SEE ALSO date(1), ftime(2), settimeofda(2), stime(2), time(2), ctime(3C).
gettimeofday(2)