The error message "segmentation fault" comes directly from the OS. Somehow it tries to execute the program "mach2qtl" and this program crashes. This is definitely not a problem coming out of your script, at least not directly.
A little hint: if you have a loop which behaves strangely try to "echo" out all the commands in question. This way you will see (instead of execute) what is to be execute:
Modify this to:
to see if what you think is executed is really executed. In loops more complicated than this example this can widely differ.
Another possibility is to insert "set -xv" at the start of the loop and "set +xv" at the end. This sends every line as it is interpreted to stderr. ("set -xv" turns this on, "set +xv" turns it off). You can monitor the script as it is executed like this:
Lets talk about your script itself now:
While not directly incorrect this could be misleading to the shell: suppose you have two variables, "$i" and "$i_". How should the shell find out which one you mean? If you want to expand a variable in the middle of a string write it this way:
This will remove all ambiguity. Further, make it a habit to ALWAYS QUOTE your strings, because a misplaced (or unexpected) space character could well lead to disaster, because it is a separator to the shell. Therefore always write
and similarly for the other line in your script.
Btw., it seems that your variables "$infofile" and "$probfile" are not getting expanded, because otherwise there would be the contents of them in the error message.
hey guys. i'm new to shell scripting but not new to programming. i want to write a script that will take all the files in the current directory that end with a particular filetype and change all their names to a number in order. so, it would take all the jpg files and sort them in alphabetical... (30 Replies)
HIya,
Having a dumb day whilst writing an archive process in Shell want to extract from the filename the date and archive into tar files based on this, I don't want to use mtime as it may not be the actual file date.
The files are
-rw-rw---- 1 user admin 100 Aug 29 11:10... (2 Replies)
I'm trying to search all .odt files in a directory for a string in the text of the file.
I've found a bash script that works, except that it can't handle whitespace in the filenames.
#!/bin/bash
if ; then
echo "Usage: searchodt searchterm"
exit 1
fi
for file in $(ls *.odt); do
... (4 Replies)
Hi All,
Could you please help in this case?
Case: there's a directory 'CKMDB'
in this directory, there are 30 files named in this manner
1.txt 2.txt 3.txt .... 30.txt
Could you please guide me how to list only even numbered
files like 2.txt... (5 Replies)
Hi again,
What i'm trying to accomplish here is search a large directory for certain filesames, read from a txt file and looping through it.
For instance, one of my target names from the loop file is:
1ad55f47-c342-496b-a46d-ba7de0f1b434
My loop is constructed thusly, run in a directory... (2 Replies)
Hi,
I have some hundreds/thousands of files named logX.dat, where X can be any integer, and they are sequential, X ranges between 1 and any number:
log1.dat log2.dat log3.dat log6.dat log10.dat ... log6000.dat
I would like to rename them to
scatter_params_0001.dat... (6 Replies)
Hi there,
I've got a set of files that are named as follows:
image_N1_8letters.jpg
image_N2_8letters.jpg
...
image_N10_8letters.jpg
image_N11_8letters.jpg
....
image_N100_8letters.jpg
image_N101_8letters.jpg
with the "8letters" bit always consisting of 8 but always different... (3 Replies)
Hi all,
I want to generate output files in a loop, run the same command on the same input file 1000 times and output in files with a new name each time, maybe a number appended to it. The output will be different each time as I`m sampling randomly from the input file.
I want to do the... (3 Replies)
Daily stupid question. I want to increment the file name everytime the script is run. So for example if the filename is manager.log and I run the script, I want the next sequence to be manager.log1. So to be clear I only want it to increment when the script is executed. So
./script... (10 Replies)
Discussion started by: metallica1973
10 Replies
LEARN ABOUT X11R4
script
SCRIPT(1) User Commands SCRIPT(1)NAME
script - make typescript of terminal session
SYNOPSIS
script [options] [file]
DESCRIPTION
script makes a typescript of everything displayed on your terminal. It is useful for students who need a hardcopy record of an interactive
session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves the dialogue in this file. If no filename is given, the dialogue is saved in the file type-
script.
OPTIONS -a, --append
Append the output to file or to typescript, retaining the prior contents.
-c, --command command
Run the command rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves
differently when its stdout is not a tty.
-e, --return
Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n.
-f, --flush
Flush output after each write. This is nice for telecooperation: one person does `mkfifo foo; script -f foo', and another can
supervise real-time what is being done using `cat foo'.
--force
Allow the default output destination, i.e. the typescript file, to be a hard or symbolic link. The command will follow a symbolic
link.
-q, --quiet
Be quiet (do not write start and done messages to standard output).
-t[file], --timing[=file]
Output timing data to standard error, or to file when given. This data contains two fields, separated by a space. The first field
indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time.
This information can be used to replay typescripts with realistic typing and output delays.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
NOTES
The script ends when the forked shell exits (a control-D for the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not
set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate
the screen, the results are meant to emulate a hardcopy terminal.
It is not recommended to run script in non-interactive shells. The inner shell of script is always interactive, and this could lead to
unexpected results. If you use script in the shell initialization file, you have to avoid entering an infinite loop. You can use for
example the .profile file, which is read by login shells only:
if test -t 0 ; then
script
exit
fi
You should also avoid use of script in command pipes, as script can read more input than you would expect.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed.
(Most shells set this variable automatically).
SEE ALSO csh(1) (for the history mechanism), scriptreplay(1)HISTORY
The script command appeared in 3.0BSD.
BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
script is primarily designed for interactive terminal sessions. When stdin is not a terminal (for example: echo foo | script), then the
session can hang, because the interactive shell within the script session misses EOF and script has no clue when to close the session. See
the NOTES section for more information.
AVAILABILITY
The script command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux June 2014 SCRIPT(1)