I am trying to analyze the files/directories inside of a directory using a shell script, for example if the file is readable, if it is a file, if it is a directory, etc. My script is set up to take a directory as input. so I would type 'file.sh directoryname'. However, when I create a for loop to analyze the files, it analyzes the files ...
Is there a command like time that can display the running time details of the last or past executed commands on the shell? ...
Nested variables have prevented me from trying to use BASH more extensively... consider the following: export SYS_DIR='/home/${LOGNAME}/sys' export APP_DIR='${SYS_DIR}/app' I always end up with > set APP_DIR=/home/${LOGNAME}/sys/app why? lol and how do I get what I want =/ I'm not trying to resolve ${${var}}, but rather actual st...
#!/bin/bash if [ ! $1 ] then echo "no param" else set FAV_COLOR=$1 echo "My fav color is ${FAV_COLOR}" fi This is not working how i expected: >favcol.sh blue My fav color is FAV_COLOR=blue any thoughts? ...
I usually store the Java applications and JAR files that I download from the Web in the ~/Java folder on my computer (an OS X machine). I have been doing this since the days when I was a Windows user. However I think in UNIX based systems user local apps are conventionally stored in another directory. I have a feeling that this directory...
Hi, I have to run a tool on around 300 directories. Each run take around 1 minute to 30 minute or even more than that. So, I wrote a python script having a loop to run the tool on all directories one after another. my python script has code something like: for directory in directories: os.popen('runtool_exec ' + directory) But whe...
I have this code, it work fin but if i change NUM_CHILDREN = 2 or any other number "not equal 1" it bad file descriptor. why is that? #include <stdio.h> #include <unistd.h> enum { NUM_CHILDREN = 1 }; static int pipes[NUM_CHILDREN][2]; void start_encoding(void) { pid_t d, h; int pipe_master[2]; pipe(pipe_master); ...
Hi! I have a static library static_library.a How to list functions and methods realized there. or at least how to look is there concrete function 'FUNCTION_NAME' realized? ...
I have a backup directory created by WDBackup (western digital external HD backup util) that contains a directory for each day that it backed up and the incremental contents of just what was backed up. So the hierarchy looks like this: 20100101 My Documents Letter1.doc My Music Best Songs Every First Songs.mp3 My...
I was going through an article today when it mentioned the following: "We've found many errors over the years. One of the absolute best was the following in the X Window System: if(getuid() != 0 && geteuid == 0) { ErrorF("Only root"); exit(1); } It allowed any local user to get root access. (The ...
What is the difference between a job and a process in Unix ? Can you please give an example ? ...
I'm trying to solve a problem I've got where a child process runs execvp() and needs to let the parent know if it returns. So, after the execvp() returns (because there's been an error), how can I tell the parent that this particular event has happened so it can handle it. There's one method of writing a string of text through the pipe ...
In asterisk I have sent a text message using SendText as follows I have two registered users in sip.conf file. sip.conf details [thillai] username=thillai secret=thillai host=dynamic type=friend allow=all context=test [selvan] username=selvan secret=selvan allow=all host=dy...
percentage of memory used used by a process. normally prstat -J will give the memory of process image and RSS(resident set size) etc. how do i knowlist of processes with percentage of memory is used by a each process. i am working on solaris unix. addintionally ,what are the regular commands that you use for monitoring processes,perfo...
What is a good method for using diff to show a percentage difference between two files? Such as if a file has 100 lines and a copy has 15 lines that have been changed the diff-percent would be 15%. ...
Is there a POSIX syscall to resolve filesystem paths? I have the CWD for a path, as well as the path to a file from that CWD. I can't use chdir to switch to the directory because I need to resolve paths from multiple threads simultaneously. I considered appending a / in between the CWD and the path, but for some reason it feels like that...
Hello. I am compiling C++ on *nix and I would like to generate a stack dump a) at an arbitrary point in the program, b) during any signal, particularly during SIGSEGV. Google tells me that ptrace is probably the tool for the job, but I can't find any comprehensible examples of walking the stack. Getting the return address, yeah, but wh...
Dear all, I am working on a project in which I have to develop bio-passwords based on user's keystroke style. Suppose a user types a password for 20 times, his keystrokes are recorded, like holdtime : time for which a particular key is pressed. digraph time : time it takes to press a different key. suppose a user types a password ...
This is a beginner question, and a follow-up to this one, where I was pointed to GLPK. I'm trying to get PyGLPK, a Python binding for the GNU Linear Programming Kit up and running, but no matter what I do, I can't seem to build and install GLPK so that Python finds it correctly. This comes after running ./configure, make, and sudo make...
Is there any java library that is similar to unix's command file? ie: $ file somepicture.png somepicture.png PNG image, 805 x 292, 8-bit/color RGB, non-interlaced The file command is such a nice tool. I need something that can tell me if the file is really what I want it to be. (ie a picture, document etc) I know I can run the comm...