45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
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---
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title: Prompts
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TARGET DECK: Obsidian::STEM
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FILE TAGS: bash
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tags:
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- bash
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---
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## Overview
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According to Robbins a POSIX-compliant shell (like Bash) generally has the primary and secondary prompts denoted with `$` and `>` respectively.
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%%ANKI
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Basic
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What symbol is usually used to denote the primary prompt?
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Back: `$$`
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Reference: Robbins, Arnold D. “GAWK: Effective AWK Programming,” October 2023. [https://www.gnu.org/software/gawk/manual/gawk.pdf](https://www.gnu.org/software/gawk/manual/gawk.pdf)
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<!--ID: 1706882670149-->
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END%%
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%%ANKI
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Basic
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What symbol is usually used to denote the secondary prompt?
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Back: `>`
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Reference: Robbins, Arnold D. “GAWK: Effective AWK Programming,” October 2023. [https://www.gnu.org/software/gawk/manual/gawk.pdf](https://www.gnu.org/software/gawk/manual/gawk.pdf)
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<!--ID: 1706882670158-->
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END%%
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Paths supplied to commands are typically "sanitized" by prefixing the path name with `./`. This is mentioned in a few different places:
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* `find -execdir` performs this prefixing automatically on all found files.
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* `awk` ambiguously interprets a file named e.g. `count=1` as variable assignment. Should write `$ awk -f program.awk ./count=1`.
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%%ANKI
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Basic
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What methodology is commonly used to "sanitize" paths supplied as command-line arguments?
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Back: Prefixing the paths with `./`.
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Reference: Cooper, Mendel. “Advanced Bash-Scripting Guide,” n.d., 916.
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<!--ID: 1706885111460-->
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END%%
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## References
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* Cooper, Mendel. “Advanced Bash-Scripting Guide,” n.d., 916.
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* Robbins, Arnold D. “GAWK: Effective AWK Programming,” October 2023. [https://www.gnu.org/software/gawk/manual/gawk.pdf](https://www.gnu.org/software/gawk/manual/gawk.pdf)
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