01-14-2015
I'm missing something here. If you're copying the contents of a file to another temp file in order to query it, why not just examine the contents of the original file?
Why do this:
read data -> write data -> read data -> process data
when you can just do this:
read data -> process data
10 More Discussions You Might Find Interesting
1. Ubuntu
Hi,
My ubuntu flavor always create temporary files having filename followed by ~ on editing. For eg: if I am editing a file called "sip.c", automatically a temporary (bkup) file is getting created with the name "sip.c~". How to avoid this file creation? (7 Replies)
Discussion started by: royalibrahim
7 Replies
2. Shell Programming and Scripting
Hi all,
In the script I am creating a temporary file with process id as temp.txt.$$
I want to remove this tomporary file first from the current directory when i'll run the same script next time.
Note: Every time when the script executes then it has unique process id and it'll create a... (5 Replies)
Discussion started by: varungupta
5 Replies
3. AIX
Hi All,
I'm getting this error when I use "pg".
/tmp is not full and the permission is correct.
root@axappk01::/home> hostname|pg
pg: 0652-122 Cannot write to the temporary file.
Please advise. (6 Replies)
Discussion started by: fara_aris
6 Replies
4. Shell Programming and Scripting
Hi All,
I have a file like below, how can i insert one line after line 1 without using a temporary file in perl?
line 1
line 2
line 3
expected result
line 1
new line <---insert here
line 2
line 3 (2 Replies)
Discussion started by: summer_cherry
2 Replies
5. Shell Programming and Scripting
Ok in my bash script i have 5 options to create a simple html script. I need to create a temporary file and whatever the user types will be stored in that file using html codes. And then I have another option in which that temporary file will be moved to the public_html directory in which the user... (19 Replies)
Discussion started by: gangsta
19 Replies
6. UNIX for Dummies Questions & Answers
Hi ,
I am facing a problem with respect to mailx command in unix . Earlier it was working fine and I am facing this issue only from last week .
I used mailx command and I am getting a error message as follows :
temporary mail file: Permission denied
If I run mailx command from... (2 Replies)
Discussion started by: deepav1985
2 Replies
7. Shell Programming and Scripting
I want remove first line of the file without using any temporary file. Everything should be done in the original file itself since I don't any file creation access whereas I have modify access.
It would be great if somebody help in this regard ASAP .
Thanks in Advance.
Kishore:mad: (1 Reply)
Discussion started by: tvbhkishore
1 Replies
8. Shell Programming and Scripting
Hi-
How can I make the temporary file 0 byte , created inside gawk.
I am using
system("rm -f temp_orders");
It seems system command is deleting file permanently and I am not able to execute below statement.
print ORD_HEAD_FULL >> cFILE; (cFile is temp_orders) (2 Replies)
Discussion started by: ashish_kaithi
2 Replies
9. UNIX for Dummies Questions & Answers
How would I go about resolving this error
temporary mail message file: No such file or directory
Can anybody tell me where the default location is for the temporary mail message file is for mailx? It appears that it doesn't exist.
Thanks (1 Reply)
Discussion started by: joen
1 Replies
10. UNIX for Beginners Questions & Answers
Text in input file is like this
<title>
<band height="21" isSplitAllowed="true" >
<staticText>
<reportElement
x="1"
y="1"
width="313"
height="20"
key="staticText-1"/>
<box></box>
<textElement>
<font fontName="Arial" pdfFontName="Helvetica-Bold"... (4 Replies)
Discussion started by: aankita30
4 Replies
LEARN ABOUT CENTOS
bio_set_mem_eof_return
BIO_s_mem(3) OpenSSL BIO_s_mem(3)
NAME
BIO_s_mem, BIO_set_mem_eof_return, BIO_get_mem_data, BIO_set_mem_buf, BIO_get_mem_ptr, BIO_new_mem_buf - memory BIO
SYNOPSIS
#include <openssl/bio.h>
BIO_METHOD * BIO_s_mem(void);
BIO_set_mem_eof_return(BIO *b,int v)
long BIO_get_mem_data(BIO *b, char **pp)
BIO_set_mem_buf(BIO *b,BUF_MEM *bm,int c)
BIO_get_mem_ptr(BIO *b,BUF_MEM **pp)
BIO *BIO_new_mem_buf(void *buf, int len);
DESCRIPTION
BIO_s_mem() return the memory BIO method function.
A memory BIO is a source/sink BIO which uses memory for its I/O. Data written to a memory BIO is stored in a BUF_MEM structure which is
extended as appropriate to accommodate the stored data.
Any data written to a memory BIO can be recalled by reading from it. Unless the memory BIO is read only any data read from it is deleted
from the BIO.
Memory BIOs support BIO_gets() and BIO_puts().
If the BIO_CLOSE flag is set when a memory BIO is freed then the underlying BUF_MEM structure is also freed.
Calling BIO_reset() on a read write memory BIO clears any data in it. On a read only BIO it restores the BIO to its original state and the
read only data can be read again.
BIO_eof() is true if no data is in the BIO.
BIO_ctrl_pending() returns the number of bytes currently stored.
BIO_set_mem_eof_return() sets the behaviour of memory BIO b when it is empty. If the v is zero then an empty memory BIO will return EOF
(that is it will return zero and BIO_should_retry(b) will be false. If v is non zero then it will return v when it is empty and it will set
the read retry flag (that is BIO_read_retry(b) is true). To avoid ambiguity with a normal positive return value v should be set to a
negative value, typically -1.
BIO_get_mem_data() sets pp to a pointer to the start of the memory BIOs data and returns the total amount of data available. It is
implemented as a macro.
BIO_set_mem_buf() sets the internal BUF_MEM structure to bm and sets the close flag to c, that is c should be either BIO_CLOSE or
BIO_NOCLOSE. It is a macro.
BIO_get_mem_ptr() places the underlying BUF_MEM structure in pp. It is a macro.
BIO_new_mem_buf() creates a memory BIO using len bytes of data at buf, if len is -1 then the buf is assumed to be null terminated and its
length is determined by strlen. The BIO is set to a read only state and as a result cannot be written to. This is useful when some data
needs to be made available from a static area of memory in the form of a BIO. The supplied data is read directly from the supplied buffer:
it is not copied first, so the supplied area of memory must be unchanged until the BIO is freed.
NOTES
Writes to memory BIOs will always succeed if memory is available: that is their size can grow indefinitely.
Every read from a read write memory BIO will remove the data just read with an internal copy operation, if a BIO contains a lot of data and
it is read in small chunks the operation can be very slow. The use of a read only memory BIO avoids this problem. If the BIO must be read
write then adding a buffering BIO to the chain will speed up the process.
BUGS
There should be an option to set the maximum size of a memory BIO.
There should be a way to "rewind" a read write BIO without destroying its contents.
The copying operation should not occur after every small read of a large BIO to improve efficiency.
EXAMPLE
Create a memory BIO and write some data to it:
BIO *mem = BIO_new(BIO_s_mem());
BIO_puts(mem, "Hello World
");
Create a read only memory BIO:
char data[] = "Hello World";
BIO *mem;
mem = BIO_new_mem_buf(data, -1);
Extract the BUF_MEM structure from a memory BIO and then free up the BIO:
BUF_MEM *bptr;
BIO_get_mem_ptr(mem, &bptr);
BIO_set_close(mem, BIO_NOCLOSE); /* So BIO_free() leaves BUF_MEM alone */
BIO_free(mem);
SEE ALSO
TBA
1.0.1e 2013-02-11 BIO_s_mem(3)