❤Single quote in awk printf
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Before diving into the rules, we introduce a concept that appears throughout this Web page, which is that of the null, or empty, string. The ' character closes the opening ' shell string literal. The shell removes the backslash and passes the quoted character on to the command. I am writing an awk program which will help me in generating an SQL out of this file.
In the rest of this Web page, we use the terms null string and empty string interchangeably. Awk never sees the quotes, and neither does sed. My requirement is to write this command in test.
Assuming its just integers. I just accidently typed a single quote and I had no sin quote for awk there. The shell literal does not support a backslash escape for this. It is impossible to embed a single quote inside single-quoted text. And this is doubly the case when dealing with remote shells. In theory, you can just do: rsh fooDNS '. The fub string is character data that has no value. AVDM Vir, You have not specified how your input file looks like. For the sake of completeness, note that print expands backslash-character escape sequences this doesn't matter in your case because the string you want to print doesn't contain any backslash. North, instead of nesting the quotes manually, I'll use: It can wrap up a string with double quotes automatically, exponentially. Different shells may do single quote in awk printf kinds of processing on double-quoted text.
- It is impossible, but two adjacent single-quoted shell strings glue together into one parameter. I am writing an awk program which will help me in generating an SQL out of this file.
Would someone please explain what is happening with below awk command? } need close with quote... Is this a bug? Or maybe a special state that I cannot find. Correct, but why no syntax error I'm getting? I just accidently typed a single quote and I had no close quote for awk there... I also tried to create a file called notme} as I found I'm not getting error for unquoted }, then did... I don't see why there needs to be a syntax error as what you have written is valid - although somewhat tortuous to read. The single quote ends the string that delimits the awk program in the shell. You then concatenate that initial part of the program with more strings provided by command substitutions and static strings in the shell. This all happens before awk has been invoked. Of course you could use command substitutions to modify a string that later is read by awk as its code, but it does not really make for easy to read code, and may be rather fragile with regards to the shell's quoting rules, word splitting etc.
