10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a file service.xml which has following content:
<?xml version="1.0" encoding="UTF-8"?>
<Service Ver="2.31.13"/>
I want to read the value of Ver (that is 2.31.13) and assign to a variable which i further use.
Please help me in that. (3 Replies)
Discussion started by: laxmikant15
3 Replies
2. Shell Programming and Scripting
I have a input file like this.
Sample.txt
30 | TXDatacenter | TXBackupDC
10 | UKDatacenter | UKBackupDC
0 | NLDatacenter | NLBackupDC
......
......
......
I need to get these values in different variables like this.
Load1=30
PriCenter1=TXDatacenter... (5 Replies)
Discussion started by: Visha
5 Replies
3. Shell Programming and Scripting
I am reading a value from a file and want to store the value in a dynamic array as i don't know the number of occurrences of the value in that file.
How can i do that and then later fetch that value from array (25 Replies)
Discussion started by: Prachi Gupta
25 Replies
4. UNIX for Dummies Questions & Answers
Hi,
when I enter 'ps -ef| grep process_name'/'psu | grep process_name', i am getting multiple number of lines output( i mean multiple no of processes).how can i store it one by one and echo it in the same way(one by one).
part of script is
var1=$(remsh hostname -l username ps -ef|grep... (2 Replies)
Discussion started by: jeanzibbin
2 Replies
5. Shell Programming and Scripting
Hi Gurus,
I am trying for a scenario where in I want to read the contents of a file line by line and then store them in variables. Below is the script:
#!/bin/ksh
while read line
do
id=`echo $line | cut -f1 -d |`
name=`echo $line | cut -f2 -d |`
echo $id
... (11 Replies)
Discussion started by: svajhala
11 Replies
6. Shell Programming and Scripting
Hi,
How to read xml tag attributes and store into variable in shell script?
Thanks,
Swetha (5 Replies)
Discussion started by: swetha123
5 Replies
7. UNIX for Dummies Questions & Answers
Hi,
How to read a file and put the values in a script. E.g.
file1.txt
02/12/2009;t1;t2
The script should read this file and put these values in 3 different variables x1,x2,x3 which can be used further.
Thanks
Ashu (3 Replies)
Discussion started by: er_ashu
3 Replies
8. UNIX for Dummies Questions & Answers
Hi all,
I'm quite new to unix and hope that someone can help me on this.
I'm using csh.
Below is what i intend to do.
1. I stored some data in a file.
2. I intend to read the file line by line and store each line of data into a variable, so that i can used it later.
Anyone have any... (4 Replies)
Discussion started by: seijihiko
4 Replies
9. UNIX for Advanced & Expert Users
Dear friends,
i am writing csh script
i have one dat file containing following data.like this.
08FD3 03A26 000FA0 FFFF0 BBA0F 00000 00000
from the above file i want to read each letter and store it in one variable.
how it is possible.
please help (7 Replies)
Discussion started by: rajan_ka1
7 Replies
10. Shell Programming and Scripting
Hello all,
I need to run snoop command for a period of time (a day) and extract remote host column from it to find out who is accessing my server. When I run the following on the command line it works
snoop -port 22 | awk '{print $3}'
but when I do
snoop -port 22 | awk '{print $3}' | while... (2 Replies)
Discussion started by: afadaghi
2 Replies
EXECL(3) Library Functions Manual EXECL(3)
NAME
execl, execv, execle, execlp, execvp, exec, execve, exect, environ - execute a file
SYNOPSIS
execl(name, arg0, arg1, ..., argn, 0)
char *name, *arg0, *arg1, ..., *argn;
execv(name, argv)
char *name, *argv[];
execle(name, arg0, arg1, ..., argn, 0, envp)
char *name, *arg0, *arg1, ..., *argn, *envp[];
exect(name, argv, envp)
char *name, *argv[], *envp[];
extern char **environ;
DESCRIPTION
These routines provide various interfaces to the execve system call. Refer to execve(2) for a description of their properties; only brief
descriptions are provided here.
Exec in all its forms overlays the calling process with the named file, then transfers to the entry point of the core image of the file.
There can be no return from a successful exec; the calling core image is lost.
The name argument is a pointer to the name of the file to be executed. The pointers arg[0], arg[1] ... address null-terminated strings.
Conventionally arg[0] is the name of the file.
Two interfaces are available. execl is useful when a known file with known arguments is being called; the arguments to execl are the char-
acter strings constituting the file and the arguments; the first argument is conventionally the same as the file name (or its last compo-
nent). A 0 argument must end the argument list.
The execv version is useful when the number of arguments is unknown in advance; the arguments to execv are the name of the file to be exe-
cuted and a vector of strings containing the arguments. The last argument string must be followed by a 0 pointer.
The exect version is used when the executed file is to be manipulated with ptrace(2). The program is forced to single step a single
instruction giving the parent an opportunity to manipulate its state. On the VAX-11 this is done by setting the trace bit in the process
status longword. Exect is not available on the PDP-11.
When a C program is executed, it is called as follows:
main(argc, argv, envp)
int argc;
char **argv, **envp;
where argc is the argument count and argv is an array of character pointers to the arguments themselves. As indicated, argc is convention-
ally at least one and the first member of the array points to a string containing the name of the file.
Argv is directly usable in another execv because argv[argc] is 0.
Envp is a pointer to an array of strings that constitute the environment of the process. Each string consists of a name, an "=", and a
null-terminated value. The array of pointers is terminated by a null pointer. The shell sh(1) passes an environment entry for each global
shell variable defined when the program is called. See environ(7) for some conventionally used names. The C run-time start-off routine
places a copy of envp in the global cell environ, which is used by execv and execl to pass the environment to any subprograms executed by
the current program.
Execlp and execvp are called with the same arguments as execl and execv, but duplicate the shell's actions in searching for an executable
file in a list of directories. The directory list is obtained from the environment.
FILES
/bin/sh shell, invoked if command file found by execlp or execvp
SEE ALSO
execve(2), fork(2), environ(7), csh(1)
DIAGNOSTICS
If the file cannot be found, if it is not executable, if it does not start with a valid magic number (see a.out(5)), if maximum memory is
exceeded, or if the arguments require too much space, a return constitutes the diagnostic; the return value is -1. Even for the super-
user, at least one of the execute-permission bits must be set for a file to be executed.
BUGS
If execvp is called to execute a file that turns out to be a shell command file, and if it is impossible to execute the shell, the values
of argv[0] and argv[-1] will be modified before return.
4.2 Berkeley Distribution August 4, 1987 EXECL(3)