Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

uio(3head) [v7 man page]

uio.h(3HEAD)							      Headers							      uio.h(3HEAD)

NAME
uio.h, uio - definitions for vector I/O operations SYNOPSIS
#include <sys/uio.h> DESCRIPTION
The <sys/uio.h> header defines the iovec structure, which includes the following members: void *iov_base /* base address of a memory region for input or output */ size_t iov_len /* size of the memory pointed to by iov_base */ The <sys/uio.h> header uses the iovec structure for scatter/gather I/O. The ssize_t and size_t types are defined as described in <sys/types.h>. USAGE
The symbol {IOV_MAX} defined in <limits.h> should always be used to learn about the limits on the number of scatter/gather elements that can be processed in one call, instead of assuming a fixed value. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
read(2), write(2), limits.h(3HEAD), types.h(3HEAD), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 uio.h(3HEAD)

Check Out this Related Man Page

uio.h(3HEAD)                                                          Headers                                                         uio.h(3HEAD)

NAME
uio.h, uio - definitions for vector I/O operations SYNOPSIS
#include <sys/uio.h> DESCRIPTION
The <sys/uio.h> header defines the iovec structure, which includes the following members: void *iov_base /* base address of a memory region for input or output */ size_t iov_len /* size of the memory pointed to by iov_base */ The <sys/uio.h> header uses the iovec structure for scatter/gather I/O. The ssize_t and size_t types are defined as described in <sys/types.h>. USAGE
The symbol {IOV_MAX} defined in <limits.h> should always be used to learn about the limits on the number of scatter/gather elements that can be processed in one call, instead of assuming a fixed value. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
read(2), write(2), limits.h(3HEAD), types.h(3HEAD), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 uio.h(3HEAD)
Man Page

15 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Monitor Resoltuion

I have posted this query few days back .. somehow its not showing now.. Well here is the problem I am facing. I have two monitors attached to my sun Unix machine. I have external graphic card attached to ti. But somehow the resolution on the main CRT ie which is connected to motherboard is not... (9 Replies)
Discussion started by: ajnabi
9 Replies

2. UNIX for Advanced & Expert Users

SCO Open Server 5.05 Installaltuion

I'm in the process of installing SCO Open Server 5.05 on the following platform: Hardware: IBM 300PL 64 MB RAM Yamaha 16/4/16 CDRW (Internal defined on SCSI ID 3 LUN 0) I'm able to boot from the CD and advance to the Installation screen but when it asks for where the media source will... (3 Replies)
Discussion started by: budrito
3 Replies

3. Shell Programming and Scripting

Env Variable substituion in Sed (-s option)

Folks, I've been trying to use the ENV variable with slashes(/) in its value inside the sed substitution.. Sed 's/myval/'$MYVAL'/' file1 >> file.tmp If MYVAL=<sometext>, it works. if MYVAL=/home/venkat, it doesnt. *************************** bash-2.05$ export VAL=/home/venkat... (5 Replies)
Discussion started by: gvsreddy_539
5 Replies

4. UNIX for Advanced & Expert Users

Tough Substituion command

I have lines like: Mg2.qns W=0.175u Mg2.qpsb W=0.175u Mg4.qns W=0.175u Mg4.qpsb W=0.175u Which I need to become: Mg2.qns W=wmg2qns Mg2.qpsb W=wmg2qpsb Mg4.qns W=wmg4qns Mg4.qpsb W=wmg4qpsb To acheive this individually line by line I use a command like:... (3 Replies)
Discussion started by: ggggdddd
3 Replies

5. Shell Programming and Scripting

doing rot13 on a field with a random number with awk

i have a several million line file like this: M:charitygeneral:water:fairbanks:charitygeneral field 2 and field 5 are the same i want to read the file and rot13 or any caesar cipher field 2 and replace the with a random number 1 - 9 anyone know how to do this? something slightly... (8 Replies)
Discussion started by: bathtub
8 Replies

6. UNIX for Dummies Questions & Answers

Choosing a distribution for old 128MB Notebook

Well, the title says most of it - I have an old IBM Thinkpad 600X with 128MB ram and want to use it mostly as a netbook - web browsing, lite text editing and the like. I've tried a few distributions, but they all seem to choke on my limited memory. Before I download and burn another bunch... (2 Replies)
Discussion started by: mrkrieger
2 Replies

7. Shell Programming and Scripting

Scanning columns for duplicates and printing in one line

Description of data: NC_002737.1 4 F1VI4M001A3IAU F1VI4M001A3IAU F1VI4M001A3IAU F1VI4M001A3IAU NC_006372.1 5 F1VI4M001BH0HY FF1VI4M001BH0HY F1VI4M001C0ZC5 F1VI4M001DOF2X F1VI4M001AYNTS Every field in every record is tab separated There can be "n" columns. Problem: What I want to... (4 Replies)
Discussion started by: Deep9000
4 Replies

8. Shell Programming and Scripting

Need help with sorting a file

I have a large file like this: 8801 sdfsdcsdc 8801 gbfgfbfgb 8801 awdawdawd 8801 lolollbny 8803 fnauinawuile 8807 zzzzvcjmc 8807 vmkmnmdguibvn 8815 sdnjsndcvn 8815 wenfunefuni 8815 asdnaksjdn ............. ............. i.e. the first column is sorted numerically, but the second... (6 Replies)
Discussion started by: kisaad
6 Replies

9. Shell Programming and Scripting

variable substitution in sed

Hi, I have to insert a line at a particular line number in my file. But the line number is not fixed and it will vary every time. So, I have to use a variable to get the line number I know we can use sed to insert lines at a particular line number but it does not work with variable... (3 Replies)
Discussion started by: sugan
3 Replies

10. Shell Programming and Scripting

Searching with a value to get an entire row

i have the file where the 1st column is unique value. ROLLNO,NAME ,SUB1,SUB2,SUB3,TOTAL,PERCENTAGE,RESULT 15 ,rig ,34 ,56 ,87 ,177 ,59 % ,PASS 23 ,wel ,45 ,76 ,56 ,177 ,59 % ,PASS 23 ,rew ,23 ,45 ,67 ,135 ,45 % ,THIRD 45 ,ramu ,24 ... (3 Replies)
Discussion started by: gotam
3 Replies

11. Shell Programming and Scripting

Script - columns to rows

Hi Everyone, I have a file text.cvs, which is a file with columns from excel. The data are separeted with semicolon. The content of the file looks like A B C D E F 1 3 3 4 3 3 2 2 1 2 5 2 5 6 1 1 2 1 Now I wish to write an script which writes the colums A, C and F in... (4 Replies)
Discussion started by: Tob26
4 Replies

12. Shell Programming and Scripting

fill in last column of data

Hello, I am fairly new to awk, and I have the following problem. My file has missing data in the last column, and the program I am pre-processing this file for cannot interpret correctly shortened rows (it just wraps the data around). Is there a way to force awk to create the same... (6 Replies)
Discussion started by: timert34
6 Replies

13. Shell Programming and Scripting

Check for null values in columns

Hi , I have below data with fixed with of 52 bytes having three columns value data. 01930 MA GLOUCESTER 02033 02025 COHASSET 01960 MA ... (3 Replies)
Discussion started by: sonu_pal
3 Replies

14. Shell Programming and Scripting

Merge two files line by line and column by column

Hi All, I have two files having oracle query result. I want to merge to files line by line and also with column File1 23577|SYNC TYPE 23578|Order Number|ConnectionState 23585|Service State|Service NameFile2 23577|AR Alarm Sync 23578|A5499|9 23585|7|test_nov7Result... (18 Replies)
Discussion started by: Harshal22
18 Replies

15. Shell Programming and Scripting

Converting Single Column into Multiple rows, but with strings to specific tab column

Dear fellows, I need your help. I'm trying to write a script to convert a single column into multiple rows. But it need to recognize the beginning of the string and set it to its specific Column number. Each Line (loop) begins with digit (RANGE). At this moment it's kind of working, but it... (6 Replies)
Discussion started by: AK47
6 Replies