Doing some training code with arrays i run into the following issue: If i ask the user how long the array is supposed to be, malloc it and then ask for the values inside the array and return the list to main and assing it to a pointer to list of integers:
i lost all ways to find out how much elements that list has, right?
And the other way around: If i have a list of integers and add it as an argument to a fucntion:
print_list(v)
there is no way to find out how long the list is inside the function called print_list() ?
If both is true, would using a global variable for the length be a good solution?
Last edited by tornow; 05-17-2013 at 09:08 PM..
Reason: error with malloc
How can change udp lenght?
Hello.
I have FreeBsd 4.7 and i want to change udp datagramm lenght.
Where it can be? What i must do? I can rebuild my core but it is not good for me.
Thanks! (4 Replies)
Hi All,
I have a pipe separated flat file.But there is often some problem with the records.So is it possible to convert the '|' separated file into a fixed length file by means of some script.
The file has 11 columns which means 10 pipes.Your help is appreciated.
i'm using Sun OS Version... (2 Replies)
I am facing a strange error while creating posix threads:
Given below are two snippets of code, the first one works whereas the second one gives a garbage value in the output.
Snippet 1
This works:
--------------
int *threadids;
threadids = (int *) malloc (num_threads * sizeof(int));
... (4 Replies)
I'm not familiar with find.
If i use find in a certain directory i want it to show based on hierarchy.
find . type d
fol1
fol1/subfol1
fol1/subfol1/subfol1
fol2
fol2/subfol2
i want it to show like this
fol1/subfol1/subfol1
fol1/subfol1
fol1
fol2/subfol2
fol2
do i need to use... (5 Replies)
Hi
I want to know the maximum length of user name under NIS? I tried googling but it didnt help :(. If there is any command to find out this please let me know. I know on unix user name should be 8 characters long but just i want to know if i can have 9 letter user under mapped under NIS. (1 Reply)
Using the KSH, write a shell script called display_by_length, which takes an absolute pathname to a directory and displays all ordinary files in the directory ordered by their length; for each file listed, display the name of the file and its length - nothing else. Extend this script to take an... (1 Reply)
I made menu script for users so they can run other script without going in shell just from menu.
But i must control their input.
These are criteria:
Input must have 4 signs
First two signs are always lower case letters
Input shall not have some special signs just letters and numbers
... (1 Reply)
actually i am trying to find the lenght of fixed width file record reading from teradata db but its not working can u guys help me out?
code which i wrote---
colmn_lngth=`cat $RPT_FILE | awk -F~ '{print $1}'`
rm $RPT_FILE
while read line
do
result=`echo $line | wc -m`
... (4 Replies)
Trying to do some control flow parsing based on the index postion of an array member. Here is the pseudo code I am trying to write in (preferably in pure bash) where possible. I am thinking regex with do the trick, but need a little help.
pesudo code
if == ENDSINFIVEINTS ]]; then
do... (4 Replies)
Discussion started by: briandanielz
4 Replies
LEARN ABOUT ULTRIX
setbuffer
setbuf(3s)setbuf(3s)Name
setbuf, setbuffer, setlinebuf, setvbuf - assign buffering to a stream
Syntax
#include <stdio.h>
void setbuf(stream, buf)
FILE *stream;
char *buf;
void setbuffer(stream, buf, size)
FILE *stream;
char *buf;
int size;
void setlinebuf(stream)
FILE *stream;
int setvbuf(stream, buf, type, size)
FILE *stream;
char *buf;
int type; size_t size;
Description
The three types of buffering available are unbuffered, block buffered, and line buffered. When an output stream is unbuffered, information
appears on the destination file or terminal as soon as written; when it is block buffered many characters are saved up and written as a
block; when it is line buffered characters are saved up until a new line is encountered or input is read from stdin. The routine may be
used to force the block out early. Normally all files are block buffered. For further information, see A buffer is obtained from upon the
first or on the file. If the standard stream stdout refers to a terminal it is line buffered. The standard stream stderr is always
unbuffered.
The routine is used after a stream has been opened but before it is read or written. The character array buf is used instead of an auto-
matically allocated buffer. If buf is the constant pointer NULL, input/output will be completely unbuffered. A manifest constant BUFSIZ
tells how big an array is needed:
char buf[BUFSIZ];
The routine, an alternate form of is used after a stream has been opened but before it is read or written. The character array buf whose
size is determined by the size argument is used instead of an automatically allocated buffer. If buf is the constant pointer NULL,
input/output will be completely unbuffered.
The routine is used to change stdout or stderr from block buffered or unbuffered to line buffered. Unlike and it can be used at any time
that the file descriptor is active.
The routine may be used after a stream has been opened but before it is read or written. Type determines how stream will be buffered.
Legal values for type, defined in stdio.h are:
_IOFBF causes input/output to be fully buffered.
_IOLBF causes output to be line buffered; the buffer will be flushed when a new line is written, the buffer is full, or input is
requested.
_IONBF causes input/output to be completely unbuffered.
If buf is not the NULL pointer, the array it points to will be used for buffering, instead of an automatically allocated buffer. The size
specifies the size of the buffer to be used. The constant BUFSIZ in <stdio.h> is suggested as a good buffer size. If input/output is
unbuffered, buf and size are ignored.
By default, output to a terminal is line buffered and all other input/output is fully buffered.
A file can be changed from unbuffered or line buffered to block buffered by using For further information, see A file can be changed from
block buffered or line buffered to unbuffered by using followed by with a buffer argument of NULL.
Restrictions
The standard error stream should be line buffered by default.
The and functions are not portable to non 4.2 BSD versions of UNIX.
See Alsomalloc(3), fclose(3s), fopen(3s), fread(3s), getc(3s), printf(3s), putc(3s), puts(3s).
setbuf(3s)