9 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Input file:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 (6 Replies)
Discussion started by: Sagar Singh
6 Replies
2. Shell Programming and Scripting
Hi all,
I have a log file say Test.log that gets updated continuously and it has data in pipe separated format. A sample log file would look like:
<date1>|<data1>|<url1>|<result1>
<date2>|<data2>|<url2>|<result2>
<date3>|<data3>|<url3>|<result3>
<date4>|<data4>|<url4>|<result4>
What I... (3 Replies)
Discussion started by: pat_pramod
3 Replies
3. Shell Programming and Scripting
Hello,
I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be:
SRVXPAPI001 ERRO JUN24 07:28:34 1775
REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F
... (8 Replies)
Discussion started by: Ferocci
8 Replies
4. Shell Programming and Scripting
my requirement is,
consider a file output
cat output
blah sdjfhjkd jsdfhjksdh
sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf
hellow there
this doesnt look good
et cetc etc
etcetera
i want to replace a line of line number 4 ("this doesnt look good") with some other line
... (3 Replies)
Discussion started by: vivek d r
3 Replies
5. Shell Programming and Scripting
Hi All,
I'm trying to figure out which are the trusted-ips and which are not using a script file.. I have a file named 'ip-list.txt' which contains some ip addresses and another file named 'trusted-ip-list.txt' which also contains some ip addresses. I want to read a line from... (4 Replies)
Discussion started by: mjavalkar
4 Replies
6. Solaris
I get a file which has all its content in a single row.
The file contains xml data containing 3000 records, but all in a single row, making it difficult for Unix to Process the file.
I decided to insert a new line character at all occurrences of a particular string in this file (say replacing... (4 Replies)
Discussion started by: ducati
4 Replies
7. Shell Programming and Scripting
FIle A
"A" 2 aa 34
3 ac
5 cd
"B" 3 hu 67
4 fg
5 gy
output shud be
A"" 2 aa 34
"A" 3 ac 34
"A" 5 cd 34
"B" 3 hu 67
"B" 4 fg 67
"B" 5 gy 67 (6 Replies)
Discussion started by: cdfd123
6 Replies
8. Shell Programming and Scripting
So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
b=1
while ; do
b=`sed -n '$ap' test`
a=`expr $a + 1`
$here do something with b etc
done
the problem is that sed does not seem to recognise the $a, even when trying
sed -n ' $a p'
So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies
9. UNIX for Advanced & Expert Users
File 1
<html>ta da....unique file name I want to give file=>343...</html>
<html>da ta 234 </html>
<html>pa da 542 </html>
and so on...
File 2
343
234
542
and so on, each line in File 1 one also corresponds with each line in File 2
I have tried several grep, sed, while .. read, do,... (4 Replies)
Discussion started by: web_developer
4 Replies
SCANF(3S) SCANF(3S)
NAME
scanf, fscanf, sscanf - formatted input conversion
SYNOPSIS
#include <stdio.h>
scanf(format [ , pointer ] . . . )
char *format;
fscanf(stream, format [ , pointer ] . . . )
FILE *stream;
char *format;
sscanf(s, format [ , pointer ] . . . )
char *s, *format;
DESCRIPTION
Scanf reads from the standard input stream stdin. Fscanf reads from the named input stream. Sscanf reads from the character string s.
Each function reads characters, interprets them according to a format, and stores the results in its arguments. Each expects as arguments
a control string format, described below, and a set of pointer arguments indicating where the converted input should be stored.
The control string usually contains conversion specifications, which are used to direct interpretation of input sequences. The control
string may contain:
1. Blanks, tabs or newlines, which match optional white space in the input.
2. An ordinary character (not %) which must match the next character of the input stream.
3. Conversion specifications, consisting of the character %, an optional assignment suppressing character *, an optional numerical maximum
field width, and a conversion character.
A conversion specification directs the conversion of the next input field; the result is placed in the variable pointed to by the corre-
sponding argument, unless assignment suppression was indicated by *. An input field is defined as a string of non-space characters; it
extends to the next inappropriate character or until the field width, if specified, is exhausted.
The conversion character indicates the interpretation of the input field; the corresponding pointer argument must usually be of a
restricted type. The following conversion characters are legal:
% a single `%' is expected in the input at this point; no assignment is done.
d a decimal integer is expected; the corresponding argument should be an integer pointer.
o an octal integer is expected; the corresponding argument should be a integer pointer.
x a hexadecimal integer is expected; the corresponding argument should be an integer pointer.
s a character string is expected; the corresponding argument should be a character pointer pointing to an array of characters large
enough to accept the string and a terminating ` ', which will be added. The input field is terminated by a space character or a new-
line.
c a character is expected; the corresponding argument should be a character pointer. The normal skip over space characters is suppressed
in this case; to read the next non-space character, try `%1s'. If a field width is given, the corresponding argument should refer to a
character array, and the indicated number of characters is read.
e a floating point number is expected; the next field is converted accordingly and stored through the corresponding argument, which
f should be a pointer to a float. The input format for floating point numbers is an optionally signed string of digits possibly contain-
ing a decimal point, followed by an optional exponent field consisting of an E or e followed by an optionally signed integer.
[ indicates a string not to be delimited by space characters. The left bracket is followed by a set of characters and a right bracket;
the characters between the brackets define a set of characters making up the string. If the first character is not circumflex (^), the
input field is all characters until the first character not in the set between the brackets; if the first character after the left
bracket is ^, the input field is all characters until the first character which is in the remaining set of characters between the
brackets. The corresponding argument must point to a character array.
The conversion characters d, o and x may be capitalized or preceded by l to indicate that a pointer to long rather than to int is in the
argument list. Similarly, the conversion characters e or f may be capitalized or preceded by l to indicate a pointer to double rather than
to float. The conversion characters d, o and x may be preceded by h to indicate a pointer to short rather than to int.
The scanf functions return the number of successfully matched and assigned input items. This can be used to decide how many input items
were found. The constant EOF is returned upon end of input; note that this is different from 0, which means that no conversion was done;
if conversion was intended, it was frustrated by an inappropriate character in the input.
For example, the call
int i; float x; char name[50];
scanf("%d%f%s", &i, &x, name);
with the input line
25 54.32E-1 thompson
will assign to i the value 25, x the value 5.432, and name will contain `thompson '. Or,
int i; float x; char name[50];
scanf("%2d%f%*d%[1234567890]", &i, &x, name);
with input
56789 0123 56a72
will assign 56 to i, 789.0 to x, skip `0123', and place the string `56 ' in name. The next call to getchar will return `a'.
SEE ALSO
atof(3), getc(3S), printf(3S)
DIAGNOSTICS
The scanf functions return EOF on end of input, and a short count for missing or illegal data items.
BUGS
The success of literal matches and suppressed assignments is not directly determinable.
7th Edition May 15, 1985 SCANF(3S)