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fstab-pretty.gawk
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fstab-pretty.gawk
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#!/usr/bin/gawk -f
# vim:sts=4:sw=4:et
BEGIN {
fstab="/etc/fstab"
while((getline <fstab) > 0) {
# Look for the longest column
if (!(is_comment($0) || is_blank($0))) {
c1 = (length($1) > c1) ? length($1) : c1
c2 = (length($2) > c2) ? length($2) : c2
c3 = (length($3) > c3) ? length($3) : c3
c4 = (length($4) > c4) ? length($4) : c4
c5 = (length($5) > c5) ? length($5) : c5
c6 = (length($6) > c6) ? length($6) : c6
}
ll[++i] = $0
}
close(fstab)
fmt = sprintf("%%-%d.%ds %%-%d.%ds %%-%d.%ds %%-%d.%ds %%-%d.%ds %%-%d.%ds\n", c1,c1, c2,c2, c3,c3, c4,c4, c5,c5, c6,c6)
for (i=1; i <= length(ll); i++) {
if (!(is_comment(ll[i]) || is_blank(ll[i]))) {
split(ll[i], l)
printf(fmt, l[1],l[2],l[3],l[4],l[5],l[6])
} else {
print ll[i]
}
}
}
function is_blank(s) {
return (match(s, /^[:blank:]*$/))
}
function is_comment(s) {
return (match(s, /^#|^[:blank:]*#/))
}