Still a Beginner here ..
Does anyone no how to get the IP address of the machine thats logged in (bearing in mind there will be others logged in) while they are logged in to the Unix server and pass this as a variable to a shell script so as I can FTP files to that machine via a shell script, at... (2 Replies)
I'm attempting to append a line after a specific address with sed. If I type in the address eg.3 then it will append after the third line. I can't get it to work with a variable though. Does anyone know how to do it please?
sed '/3/a\
text' filename :)
sed '/\$address/a\
text' filename... (8 Replies)
Hi there,
I need help on setting the path variable. How can I set the path variable with Bourne Shell. My scripts goes like this, but did not work.
#!/bin/sh
PATH=/usr/bin:/usr/ucb:/etc:/export/home/zchen/home
export PATH
Thanks,
Z (4 Replies)
Hi,
I am having a variable
Like
line="/dir1/dir2/gr3/file.ksh"
I need to get the /dir1/dir2/gr3 alone. the no of directories may differ at each time.
Please advice. thanks in advance. (3 Replies)
Hello,
i have another sed question.. I'm trying to do variable substition with sed and i'm running into a problem.
my var1 is a string constructed like this:
filename1 filerev1 filepath1
my var2 is another string constructed like this:
filename2 filerev2 filepath2
when i do... (2 Replies)
By using a csh, I want to address a variable content whose name is/matches the content of a given other variable.
i.e.
set name=´sam´
set ${name}_age=´27´
So, by typing: echo ${name}_age
I correctly obtain: sam_age
By typing: echo $sam_age
or echo ${sam_age}
I correctly obtain: 27
... (1 Reply)
Hi
I need a script which will remove a path from PATH environment variable. For example
$echo PATH
/usr/local/bin:/usr/bin:test/rmve:/usr/games
$echo rmv
test/rmve
Here I need a shell script which will remove rmv path (test/rmve) from PATH... (9 Replies)
Hi,
Could anyone help me in writing a single line code by either using (sed, awk, perl or whatever) to extract a specific path from the PATH environment variable?
for eg: suppose the PATH is being set as follows
PATH=/usr/bin/:/usr/local/bin:/bin:/usr/sbin:/usr/bin/java:/usr/bin/perl3.4
... (2 Replies)
Hello Folks,
I want to append a path in user's PATH variable which should be available in current session.
Background
Numerous persons will run a utility.
Aim is to add the absolute path of the utility the first time it runs so that next runs have the PATH in env & users can directly run... (6 Replies)
Hi I'm trying to select text between two lines, I'm using sed to to this, but I need to pass variables to it. For example
start="BEGIN /home/mavkoup/data"
end="END"
sed -n -e '/${start}/,/${end}/g' doesn't work. I've tried double quotes as well. I think there's a problem with the / in the... (4 Replies)
Discussion started by: mavkoup
4 Replies
LEARN ABOUT LINUX
edata
END(3) Linux Programmer's Manual END(3)NAME
etext, edata, end - end of program segments
SYNOPSIS
extern etext;
extern edata;
extern end;
DESCRIPTION
The addresses of these symbols indicate the end of various program segments:
etext This is the first address past the end of the text segment (the program code).
edata This is the first address past the end of the initialized data segment.
end This is the first address past the end of the uninitialized data segment (also known as the BSS segment).
CONFORMING TO
Although these symbols have long been provided on most Unix systems, they are not standardized; use with caution.
NOTES
The program must explicitly declare these symbols; they are not defined in any header file.
On some systems the names of these symbols are preceded by underscores, thus: _etext, _edata, and _end. These symbols are also defined for
programs compiled on Linux.
At the start of program execution, the program break will be somewhere near &end (perhaps at the start of the following page). However,
the break will change as memory is allocated via brk(2) or malloc(3). Use sbrk(2) with an argument of zero to find the current value of
the program break.
EXAMPLE
When run, the program below produces output such as the following:
$ ./a.out
First address past:
program text (etext) 0x8048568
initialized data (edata) 0x804a01c
uninitialized data (end) 0x804a024
Program source
#include <stdio.h>
#include <stdlib.h>
extern char etext, edata, end; /* The symbols must have some type,
or "gcc -Wall" complains */
int
main(int argc, char *argv[])
{
printf("First address past:
");
printf(" program text (etext) %10p
", &etext);
printf(" initialized data (edata) %10p
", &edata);
printf(" uninitialized data (end) %10p
", &end);
exit(EXIT_SUCCESS);
}
SEE ALSO objdump(1), readelf(1), sbrk(2), elf(5)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/.
GNU 2008-07-17 END(3)