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awk: Make -F '' and -v FS="" behave the same

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IEEE Std 1003.1-2008 mandates that -F str be treated the same as -v
FS=str. For a null string, this was not the case. Since awk(1) documents
that a null string for FS has a specific behavior, make -F '' behave
consistently with -v FS="".

PR:
upstream issue:		https://github.com/onetrueawk/awk/issues/127
Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2021-07-19 22:47:30 -06:00
parent c0f4e97e45
commit 45dab2a7e0
1 changed files with 1 additions and 5 deletions
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6
main.c
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@ -91,9 +91,7 @@ setfs(char *p)
/* wart: t=>\t */
if (p[0] == 't' && p[1] == '\0')
return "\t";
else if (p[0] != '\0')
return p;
return NULL;
return p;
}
static char *
@ -169,8 +167,6 @@ int main(int argc, char *argv[])
break;
case 'F': /* set field separator */
fs = setfs(getarg(&argc, &argv, "no field separator"));
if (fs == NULL)
WARNING("field separator FS is empty");
break;
case 'v': /* -v a=1 to be done NOW. one -v for each */
vn = getarg(&argc, &argv, "no variable name");