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, exect, environ - execute a file
Syntax
execl(name, arg0, arg1, ..., argn, (char *)0)
char *name, *arg0, *arg1, ..., *argn;
execv(name, argv)
char *name, *argv[];
execle(name, arg0, arg1, ..., argn, (char *)0, envp)
char *name, *arg0, *arg1, ..., *argn, *envp[];
execlp(file, arg0, arg1, ..., argn, (char *)0)
char *file, *arg0, *arg1, ..., *argn;
execvp(file,argv)
char *file, *argv[];
exect(name, argv, envp)
char *name, *argv[], *envp[];
extern char **environ;
Description
These routines provide various interfaces to the system call. Refer to for a description of their properties; only brief descriptions are
provided here.
In all their forms, these calls overlay the calling process with the named file, then transfer 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. is useful when a known file with known arguments is being called; the arguments to are the character strings
constituting the file and the arguments; the first argument is conventionally the same as the file name (or its last component). A 0 argu-
ment must end the argument list.
The version is useful when the number of arguments is unknown in advance. The arguments to are the name of the file to be executed and a
vector of strings containing the arguments. The last argument string must be followed by a 0 pointer.
The version is used when the executed file is to be manipulated with The program is forced to single step a single instruction giving the
parent an opportunity to manipulate its state. On VAX-11 machines, this is done by setting the trace bit in the process status longword.
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.
The argv is directly usable in another because argv[argc] is 0.
The 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 passes an environment entry for each global shell
variable defined when the program is called. See for some conventionally used names. The C run-time start-off routine places a copy of
envp in the global cell which is used by and to pass the environment to any subprograms executed by the current program.
The and routines are called with the same arguments as and 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.
Restrictions
If 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.
Diagnostics
If the file cannot be found, if it is not executable, if it does not start with a valid magic number if maximum memory is exceeded, or if
the arguments require too much space, a return constitutes the diagnostic; the return value is -1. For further information, see Even for
the super-user, at least one of the execute-permission bits must be set for a file to be executed.
Files
/bin/sh Shell, invoked if command file found by execlp or execvp
See Also
csh(1), execve(2), fork(2), environ(7)
RISC execl(3)