12-07-2009
10 More Discussions You Might Find Interesting
1. Programming
I know how to read and write if i have a forked process with only one child. However what is involved with reading and writing with many forked processes. Say one parent that forks 5 children, and needs to communicate with all 5 in half duplex.
int temp, counter=0;
do{
pipe(temp);
... (5 Replies)
Discussion started by: steveneliuk
5 Replies
2. UNIX Desktop Questions & Answers
OK... I'm fairly new to unix having the admin handed to me on a platter w/almost no training.
However, being a programmer, I do pick up things fairly easily, but this one is getting the best of me.
I have a unix server that runs multiple versions of the same ERP system, hand crafted for our... (1 Reply)
Discussion started by: chimodel
1 Replies
3. Shell Programming and Scripting
Morning All,
Quite a simple one this, I hope. What I want to do is to re-write the first line of a file before it's sent to print. The line will be blank initially, and I want to insert some text. The operation can either be done on the file itself (modifying the file on disk), OR in a... (2 Replies)
Discussion started by: alexop
2 Replies
4. UNIX for Dummies Questions & Answers
I want to try the unix pipe, the command is like this:
echo new | find .
the standard output of the echo should be "new", then I guess find command will use this output as input to find the file named "new". But the output is all the file names in my current dir, the last line is "echo: write... (5 Replies)
Discussion started by: andrewust
5 Replies
5. UNIX for Dummies Questions & Answers
Hi -- I'm looking to write to a file after piping output from tail -f through to grep:
#write to a file for all lines with "searchtext" within in error_log:
Expand|Select|Wrap|Line Numbers
tail -f /var/error_log | grep searchtext > output.txt
The above command... (2 Replies)
Discussion started by: ndedhia1
2 Replies
6. UNIX for Advanced & Expert Users
The "write failed: Broken pipe" message is reported by the file sending PC which run my writed network device driver while 500MB or 900MB is sended!
What does the message mean? Does this mean there is a bug in my driver?
li,kunlun (11 Replies)
Discussion started by: liklstar
11 Replies
7. UNIX for Dummies Questions & Answers
Hi friends,
I have a file where I should search for a string and get the rest of the line but without the delimiter using awk.
for example I have the series of string in a file:
input_string.txt
bbb
ccc
aaa
and the mapping file looks like this.
mapping.txt
aaa|12
bbb|23
ccc|43... (11 Replies)
Discussion started by: kokoro
11 Replies
8. Shell Programming and Scripting
Sed command to replace a line in a file using line number from the output of a pipe.
Is it possible to replace a whole line piped from someother command into a file at paritcular line...
here is some basic execution flow..
the line number is 412
lineNo=412
Now i have a line... (1 Reply)
Discussion started by: vivek d r
1 Replies
9. Shell Programming and Scripting
I am trying to keep variables in a file.
if I have all variables at the same time, I can write them all like below.
echo $var1","$var2","$var3
But, these variables are being calculated at different times then they are lost
so I want to keep them in a file seperated by "," .
echo... (5 Replies)
Discussion started by: snr_silencer
5 Replies
10. Shell Programming and Scripting
I have a file as below
Emp1|FirstName|MiddleName|LastName|Address|Pincode|PhoneNumber
1234|FirstName1|MiddleName2|LastName3| Add1 || ADD2|123|000000000
2345|FirstName2|MiddleName3|LastName4|
Add1 || ADD2|
234|000000000
OUTPUT :
... (1 Reply)
Discussion started by: styris
1 Replies
LEARN ABOUT OPENSOLARIS
print
print(1) User Commands print(1)
NAME
print - shell built-in function to output characters to the screen or window
SYNOPSIS
ksh
print [-Rnprsu [n]] [arg]...
ksh93
print [-Renprs] [-f format] [-u fd] [string...]
DESCRIPTION
ksh
The shell output mechanism. When no options are specified, or when an option followed by ' a - is specified, or when just - is specified,
the arguments are printed on standard output as described by echo(1).
ksh93
By default, print writes each string operand to standard output and appends a NEWLINE character.
Unless, the -r, -R, or -f option is speciifed, each character in each string operand is processed specially as follows:
a Alert character.
Backspace character.
c Terminate output without appending NEWLINE. The remaining string operands are ignored.
E Escape character (ASCII octal 033).
f FORM FEED character.
NEWLINE character.
Tab character.
v Vertical tab character.
\ Backslash character.
x The 8-bit character whose ASCII code is the 1-, 2-, or 3-digit octal number x.
OPTIONS
ksh
The following options are supported by ksh:
-n Suppresses new-line from being added to the output.
-r-R Raw mode. Ignore the escape conventions of echo. The -R option prints all subsequent arguments and options other than -n.
-p Cause the arguments to be written onto the pipe of the process spawned with |& instead of standard output.
-s Cause the arguments to be written onto the history file instead of standard output.
-u [ n ] Specify a one digit file descriptor unit number n on which the output is placed. The default is 1.
ksh93
The following options are supported by ksh93:
-e Unless -f is specified, process sequences in each string operand as described above. This is the default behavior.
If both -e and -r are specified, the last one specified is the one that is used.
-f format Write the string arguments using the format string format and do not append a NEWLINE. See printf(1) for details on how to
specify format.
When the -f option is specified and there are more string operands than format specifiers, the format string is reprocessed
from the beginning. If there are fewer string operands than format specifiers, then outputting ends at the first unneeded for-
mat specifier.
-n Do not append a NEWLINE character to the output.
-p Write to the current co-process instead of standard output.
-r Do not process sequences in each string operand as described above.
-R
If both -e and -r are specified, the last one specified is the one that is used.
-s Write the output as an entry in the shell history file instead of standard output.
-u fd Write to file descriptor number fd instead of standard output. The default value is 1.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 Output file is not open for writing.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
echo(1), ksh(1), ksh93(1), printf(1), attributes(5)
SunOS 5.11 27 Mar 2008 print(1)