Portable way to build up arguments for a utility in shell?
If you need to use mostly-POSIX sh, such as would be available in busybox ash-named-bash, you can build up positional parameters directly with set $ set -- hello $ set -- "[email protected]" world $ printf '%s\n' "[email protected]" hello world For a more apt example: $ set -- /etc -name '*b*'...
zmodem upload ends up with strange error
embedded-linux,putty,busybox,jffs2,zmodem
Quite simple approach to check how much space there is left, even if you have no "df": I just copied an existing file several times and the result was: "No space left on the device". So I'm pretty sure that the strange behaviour described above happened because of this....
How to extract value of root variable from kernel commandline
sed works better here: cat /proc/cmdline | sed -e 's/^.*root=//' -e 's/ .*$//' The first expression removes root= and everything before. The second one removes the next space and everything after....
Listing files and folders hierarchy in a limited shell
From BusyBox's page I can see you have ls's option -R: -R List subdirectories recursively So you can just write: $ ls -R / Due to you don't have the -R option, you could try with a recursive shell function like this: myls() { for item in "$1"/* "$1"/.*; do...
Bug in my shell script after manipulating positional parameters with quotes?
Your script is looking for filenames with literal " characters in them. This implies that you're doing something like: set -- "[email protected]" -iname '"*.png"' ...instead of the correct alternative... set -- "[email protected]" -iname '*.png' See BashFAQ #50 for details and background on the set of mistunderstandings that generally lead to...
Android busybox sed: bad option in substitution expression
If you need pretty formatting, you'll have to inject newlines and tabs (which pain me in sed); an untidy but otherwise formed equivalent below: I think you only need to match the insertion point (the penultimate or last line) thus: cat infile | sed -e "s/<\/permission>/<group gid=\"media_rw\"\/><\/permission>/" gives <permission name="android.permission.WRITE_EXTERNAL_STORAGE"...
Can't increment a 0-padded number past 8 in busybox sh
linux,shell,embedded-linux,busybox,ash
The problem is that leading 0s cause a number to be read as octal. In bash, using $((10#$num)) will force decimal. Thus: num=$(printf "%04d" "$((10#$num + 1))") To work with busybox ash, you'll need to strip the 0s. One way to do this which will work even in busybox ash:...
Uploading files to busybox machine
linux,bash,embedded-linux,busybox
Thank you for the fast replies. I found on the machine a tftp client. Therefore I could execute: /usr/bin/tftp -l /tmp/tst -r testfile.txt -g <server ip> after opening a tftp server on ....
Starting the UDHCPC Daemon with Posix_Spawn in BusyBox.
The udhcpc client should accept an -f or --foreground option, which causes it to not perform it's own fork-exec, which is why you get the temporary pid. You also are using the pidfile option, so you could read that content as well....
Embedded linux and busybox
You can use Buildroot, that's a buildsystem that downloads the linux kernel, manages rootfs, integrates BusyBox, and much much more. From my opinion it's the easiest way to get an embedded Linux/BusyBox system. Here's their homepage: http://buildroot.uclibc.org/...
SIGHUP signal handler reset to default when using system() on embedded linux with busybox
Digging deeper into the sources of the busybox that is running on the Linux I found out that the shell in busybox is calling signal(SIGHUP, SIG_DFL); during init. This resets the sighup handler to default. So the shell itself and the program it runs (provided with -c ...) are running...
how to list directory with same string in its name in shell script?
The following works correctly for me to get the number of such files. ls $LGNAME* | wc -l If you wanted them sorted in reverse timestamp order, this should work fine: ls -rt $LGNAME* To answer the more general question, you could do something like this. I am not sure...
Linux shell script with file saving and sequential file naming
linux,shell,embedded-linux,busybox,dash
This will work if and only if your filenames are all identical except for the numeric part, and the numeric part is padded enough that they're all the same number of digits. set -- *.jpg # put the sorted list of names on argv while [ $# -gt 1 ];...
GNU C Cross-compiler: Cannot execute binary file
This really looks like a kernel that is configured for pure 64-bit userspace, no i386 support. This would be CONFIG_IA32_EMULATION in the kernel config. Check /proc/config.gz to confirm....
Renaming part for file using mv command in shell script
You can use BASH string manipulation: f='foo-12APR2014.tar.gz' nf="foo1-${f#*-}" Test: echo "$nf" foo1-12APR2014.tar.gz PS: If not using BASH then you can use sed: nf=`echo "$f"|sed 's/^foo/foo1/'` ...
BusyBox tar: append workaround given limited disk space?
In principle, you just need to append a tar repository containing the additional files to the end of the tar file. It is only slightly more difficult than that. A tar file consists of any number of repetitions of header + file. The header is always a single 512-byte block,...
busybox ash via paramiko not emitting prompt on stdout
python,ssh,paramiko,busybox,ash
First: If you're trying to recognize shell prompts when invoking a shell programmatically, you're Doing It Wrong. If you use exec_command() on a new channel (over the same transport) for each command you want to run, you'll get a separate stdout, stderr, etc. for each command; have the exit status...
How to check the process scheduling policy other than `ps` output
You can find schedule information of a process by looking at /proc/pocess_id/sched. For example: awk '/policy/ {print $NF}' /proc/25/sched would give you the policy number of process 25. For more information on policy numbers, you can look at man sched_setscheduler: Scheduling Policies: ... For threads scheduled under one of the...
A script to test for traffic from a streaming server?
linux,bash,busybox,network-traffic
I use netcat in FreeBSD, which has a -z option that simply checks whether a port is open. This eliminates the background and sleep you're using in your script. -z Specifies that nc should just scan for listening daemons, without sending any data to them. The option exists in netcat...