I have read where C is first converted to Assembly before its final compilation to binary. Is there a way to do this with Bash commands? I would like the understanding that Assembly allows to Bash somehow.
View 14 RepliesI have a Bash script that runs other bash scripts. If the parent code fails, is there any way for me to also kill the child code?That kills any multiple instances of a script if I run it more than once. Is there any way I can just modify this into something that prevents the child code from running/continuing from running if the parent stops from an error?
View 3 Replies View RelatedLooking for code to add 5 numbers in assembly? I want to use array for input of those 5 numbers. No problem if the output is 1 digit(0....9).
View 3 Replies View RelatedI've been converting some C code to assembly for my homework; it was going well but I'm having trouble with a for loop for hours. I could not understand where is the problem and decided to ask. I'm posting the part where I'm having trouble of my C-code and assembly-code; every other part of codes act same and the variable values are same. I'm waiting this two codes to act same, but they don't.
Code:
mov ebx, [result]
mov eax, [i]
mov ecx, [ebx+eax]
mov [j], ecx
mov [ebx+eax], byte '.'
_loop:
mov ebx, [result]
mov eax, [i]
inc eax
mov cl, [ebx+eax]
cmp cl, 'Z'
je _continue
mov ebx,[result]
mov eax,[i]
inc eax
mov ecx, [ebx+eax]
mov [k], ecx
mov ebx, [result]
mov eax, [i]
inc eax
mov ecx, [j]
mov [ebx+eax], ecx
mov ecx, [k]
mov [j], ecx
inc dword [i]
jmp _loop
_continue:
Code:
j=result[i];
result[i]='.';
for(;result[i+1]!='Z';i++){
k=result[i+1];
result[i+1]=j;
j=k;
}
I have a BASH shell script with embedded SQL script. The SQL script fetches the data from oracle server and the data contains more than 8 spaces in the value (eg, 28051630 A) and the data is written to flat file using the below syntax:
$ORACLE_HOME/bin/sqlplus -s ${CONNECT_STRING} >${out_file} <<!!
.. sql query..
!!
The problem is that whenever the data is written to ${out_file} spaces are getting converted to TAB character
eg, 10 spaces (in Oracle) converted to 1 TAB and 2 spaces 7 spaces (in Oracle) converted to 1 TAB and 1 space Also, from above example you can see the width of TAB char is not constant (8 in first example and 6 in second example) Is there any way that I can stop shell script to convert spaces into TAB character as I want the data as it is from Oracle DB (i.e. only spaces not TABs)
i want to see the source code of different commands .how they are working ??for ex why ls is listing all the files and directory .what code is written for ls so that it is listing like this.where the source code is kept by the os
View 2 Replies View RelatedMy question has to do with how environmental variables are passed from parent to child processes at the BASH SOURCE CODE level. I have a need to add an environmental variable that has the complete invocation line so that the child process can see it via ENVP.I have been studying the source for a quite a while and can't seem to find how to make the variable pass to the child. In EXECUTE_CMD.c I found a good place to set the variable: I made a routine similar to PUT_COMMAND_NAME_INTO_ENV called PUT_COMMAND_LINE_INTO_ENV which would add "?=THE FULL INVOCATION LINE" as an environmental variable but it doesn't make it to the child. (I've tried names other than '?' but they don't work either.
I'm thinking that there is either a LIST or a attribute associated with those environmental variables that should be passed to the child but I can't find it.
I need to do some text file manipulation which I think should be done with standard commands in BASH. I'm looking at comma seperated text files (stock market data). It comes in the form of date, stock code, open, high, low, close, volume. What I need to do first is move all data with same stock code sequentially into individual files.
While doing this since the stock code will now be the file name I need to remove the stock code. Next I need to filter out overlapping data from different files with the same date. ie. where two files contain the same date on the one line only one line will be added to the combined file. I think there must be a tutorial out there for basic text manipulation like this, I just haven't found it yet.
how to compile assembly code in linux? I am using AMD processor code instructions...is that amd registers inbuilt? with what file extension i should give while writing assembly code program?
View 14 Replies View Related/tmp/cctiuwxL.s: Assembler messages:
/tmp/cctiuwxL.s:3534: Error: unknown opcode
/tmp/cctiuwxL.s:3534: Error: unknown opcode
/tmp/cctiuwxL.s:3602: Error: unknown opcode
[code]....
This is the make step error./tmp/cctiuwxL.s is the make temporary dirictory which is distroyed after the make process finises . The problem is how can I hold the /tmp/cctiuwxL.s dirictory .Then I can check it and find out the proiblem.
I've tried to use google to find this, and all I find is M$ SAL and some annotation standard for java, neither of which is anything like what I'm looking for.
I am pouring over someone else's source code, and want to be able to take notes on it, saving those notes in a separate text file that I can grep, open in a text editor, etc. I want each annotation line to include a line number (or range of lines) so it's easy to know what part of the code it refers to.
I could do this by hand, but it would be nice if a program existed to read and write such a file format. It could be similar to Kompare, only with editable notes on one side and source on the other, linked together with colored bands.
Does such a thing exist?
Cosme Zamudio and I are discussing a possible file format and an Android app - [url]
Where can I find the top command source code... I got it from "http://procps.sourceforge.net/index.html" but it seems for Solaris. where can I get the source code for top commend running on Linux????
View 3 Replies View RelatedIn particular i'd like to know where is the kernel source code in slackware 13.
View 2 Replies View RelatedDoes anyone have source code on Email parsing in C++
View 1 Replies View RelatedI found on the Internet a rough suggestion to debug code which says to add a line:
An example shows this lists the lines of source that do work.
I do not know where these lines are supposed to go and whether the "notdeadyet" should be a call to a subroutine or what. I only found that "%define" is used to link to external files, so I am confused because what I tried did not work.
(I am unable to use (and learn) any debugging tool for another few weeks and I'd like to progress on this If I can.)
I just want to see how the command line such as : "cat", "split", "ls"...ect source code ? Are they written in C or other language ? I don't know where to search those?
View 6 Replies View RelatedFor one of my class projects, we have to analyze a usb keyboard driver source code and be able to understand it and present it to the class. Me and a few other people are working together by breaking up the code into sections so each person can analyze a section of code.Now I've ran into a section of this code that I am a little confused about. It seems fairly simple but I just wanted to double check since I wasn't able to find a solid answer.
Code:
static const unsigned char usb_kbd_keycode[256] = {
0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
[code]....
I want to modify the source of cd (the 'change directory' command) to do a little extra for me, but I can't seem to find the source code anywhere.. maybe I didn't look for it well enough, and googling "source code cd" and variants of that doesn't exactly help... I was wondering if anyone knew where I could find the src?
View 14 Replies View RelatedWhere can I get the source code of quick thread?
View 1 Replies View Relatedwant to set more text files. They have "tab" differently (3, 4, 6 or 5 characters space).I have to use "sed" or "awk" sette them in the same tab (for example five space haracters).
View 14 Replies View RelatedWhere are the other BASH commands/exe stored? If the commands are part of the exe of BASH than ls would not be in a path, correct?
View 11 Replies View RelatedI'm investigating how to copy a file located in my file system into another device. I googled to find a solution for my case but I didn't find anything. My original problem was to find a way to permit my code to move a file into a USB device. I wonder If is there a way to implement the cp command or some mechanism that permits my code to interact with between the file system on my computer and the second one on USB external driver (FAT32) ?
View 3 Replies View RelatedI have a problem in programing pseudo terminal. In the book APUE (advanced programing in the unix environment) in chapter 15.4: coprocess gives an example of using pipe to operate another program, that provide its input and read its output: Figure 15.18. Figure 15.19 is filter to add two numbers using standard IO. The author said that you must flush the IO buffer in the program which are operated through pipe by another program, however, we cannot add fflush to the source code and re-compile the whole program if we need to use it in another process. It said that pseudo terminal can solve this problem, but I have tried in fedora12 with forkpty call and fail. Source code as follows:
The main process:
Code:
#include "common.h"
#define LINESIZE 256
int main()
{
int fd[2];
pid_t pid;
if( socketpair(AF_UNIX, SOCK_STREAM, 0, fd)<0 ) {
perror("create socket error");
exit(1);
}
int master;
struct termios tm;
if( tcgetattr(STDIN_FILENO, &tm)<0 ) {
perror("tcgetattr error");
exit(3);
}
struct winsize size;
if( ioctl(STDIN_FILENO, TIOCGWINSZ, (char*)&size)<0 ) {
perror("ioctl error");
exit(4);
}
setbuf(stdout, NULL);
pid=forkpty(&master, NULL, &tm, &size);
if( pid<0 ) {
perror("create process error");
exit(2);
}
else if(pid>0) {//parent
close(fd[1]);
char line[LINESIZE];
memset(line, 0, LINESIZE);
while( fgets(line, LINESIZE, stdin)!=NULL ) {
write(fd[0], line, strlen(line));
memset(line, 0, LINESIZE);
int n=read(fd[0], line, LINESIZE);
if(n>=0) line[n]=0;
printf("%s", line);
memset(line, 0, LINESIZE);
}
} else {//child
close(fd[0]);
if( fd[1]!=STDIN_FILENO ) {
if(dup2(fd[1], STDIN_FILENO)!=STDIN_FILENO) {
perror("dup2 error");
exit(1);
}
}
if( fd[1]!=STDOUT_FILENO) {
if(dup2(fd[1], STDOUT_FILENO)!=STDOUT_FILENO) {
perror("dup2 error");
exit(2);
}
}
close(fd[1]);
if(execl("./add", "add", (char*)0)<0) {
perror("exec error");
exit(3);
}
exit(0);
}
//parent
wait(NULL);
return 0;
}
The add program reads a line and get two numbers and return the sum of them.
Code:
#include "common.h"
int main() { int n1, n2;
char line[256];
memset(line, 0, 256);
while( fgets(line, 256, stdin)!=NULL) {
sscanf(line, "%d%d", &n1, &n2);
printf("%d", n1+n2);
fflush(NULL); /*the program does not work without this sentence why?*/
memset(line, 0, 256); } return 0; }
running a java application in a remote site,and I would like to debug the application. I'm using jdb, and, due to network architecture, I can only use jdb do debug in text-mode. To debug in text-mode I use the command: jdb -attach remotesite: port. At this point this is ok. Now I would like to attach the source code to the jdb. I tried the command
jdb -attach remotesite: port ~/src/org/path/file.java
to attach the source code to the remote debug to. But it doesn't work. In jdb, I try the command use ~/src/org/path/file.java but it doesn't work either. How can I attach the source code to the remote debug?
please i try to compile the below code on ubuntu with g++ but i was getting an error message
fig03_05.cpp:10: error: new types may not be defined in a return type
fig03_05.cpp:10: note: (perhaps a semicolon is missing after the definition of �GradeBook�)
fig03_05.cpp:32: error: two or more data types in declaration of �main�
[code]...
I had made some modifications in the source code of a software called "HomeBank". I'm not able to make a setup file using "Inno setup".how to create an .EXE file for the source code to execute.
View 2 Replies View Relatedi am trying to generate a linux executable data (bin data) from my java source code.
View 4 Replies View RelatedI want to find a simple and quick way to permit my application to bring a file located in my file system and write it into an external USB device. I have to use Bulk Transfer Only mode that means to use stream of characters only. I looked through the LibUsb library using it in my IDE I can transmit a string. To transfer a whole file I suppose I've to dodge the file system building a char sequence that permits to recognise a file in the file system and to put it into the usb device.
View 1 Replies View RelatedI've never really taken advantage of Linux being open source before but I was wondering how the copy and paste functions look like. So far I have found out that they are handled by the X Window System (by reading this thread).But I don't seem to get much further than that.
View 1 Replies View RelatedI am doing a project on page replacement algorithms.... Can anyone point out the the source code for page swapping in linux kernel source tree.(I am using 2.6.31 kernel on a 32 bit x86 machine).
View 1 Replies View Related