Shell script - Revision history

T1t0 at 06:31, 22 May 2024

2024-05-22T06:31:49Z

← Older revision		Revision as of 06:31, 22 May 2024
Line 1:		Line 1:
	= Security =		= POSIX shell =

			https://pubs.opengroup.org/onlinepubs/9699919799/idx/shell.html

			= Bash shell =

			== Security ==

	* about variable quotes https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells		* about variable quotes https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells

	= Parameter substitution =		== Parameter substitution ==

	* from https://tldp.org/LDP/abs/html/parameter-substitution.html		* from https://tldp.org/LDP/abs/html/parameter-substitution.html

T1t0: T1t0 moved page Bash script to Shell script without leaving a redirect

2024-05-22T06:30:41Z

T1t0 moved page Bash script to Shell script without leaving a redirect

← Older revision	Revision as of 06:30, 22 May 2024
(No difference)

T1t0: Created page with "= Security = * about variable quotes https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells = Parameter substitution = * from https://tldp.org/LDP/abs/html/parameter-substitution.html * and https://www.cyberciti.biz/tips/bash-shell-parameter-substitution-2.html

 #!/usr/bin/env bash  set -o errexit -o nounset -o pipefail    BAR_A_ROOT=1 BAR_A_PATHS=2 BAR_B_ROOT=3 BAR_C_PATHS=4 BAR_D_ROOT=5 BAR..."

2024-03-11T23:48:18Z

Created page with "= Security = * about variable quotes https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells = Parameter substitution = * from https://tldp.org/LDP/abs/html/parameter-substitution.html * and https://www.cyberciti.biz/tips/bash-shell-parameter-substitution-2.html <pre> #!/usr/bin/env bash set -o errexit -o nounset -o pipefail BAR_A_ROOT=1 BAR_A_PATHS=2 BAR_B_ROOT=3 BAR_C_PATHS=4 BAR_D_ROOT=5 BAR..."

New page

= Security =

* about variable quotes https://unix.stackexchange.com/questions/171346/security-implications-of-forgetting-to-quote-a-variable-in-bash-posix-shells

= Parameter substitution =

* from https://tldp.org/LDP/abs/html/parameter-substitution.html
* and https://www.cyberciti.biz/tips/bash-shell-parameter-substitution-2.html

<pre>
#!/usr/bin/env bash

set -o errexit -o nounset -o pipefail

BAR_A_ROOT=1
BAR_A_PATHS=2
BAR_B_ROOT=3
BAR_C_PATHS=4
BAR_D_ROOT=5
BAR_D_PATHS=6

for VAR in ${!BAR_*}
do
VALUE=${!VAR}
V=${VAR#BAR_}
ONE=${V%%_*}
TWO=${V##*_}
echo \'$ONE\' \'$TWO\' \'$VALUE\'
done
</pre>

[[Category:unix]]
[[Category:linux]]
[[Category:shell]]
[[Category:bash]]