bash remove trailing newline from variable

WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON", # We are truly at the end, so shuffle to the next line. if ($c eq "\t") { "do not initialise globals to $1\n" . ctx_statement_block($linenr, $remain, $off); $name =~ /^${Ident}_$2/) { $fix) { } $count++; } $herecurr) && trim($r2)/e; $sline =~ s/$;/ /g; #with comments as spaces if (defined $1) { elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(. removeTrailNewline () { [ [ $ (tail -c 1 "$1") ]] || truncate -s-1 "$1"; } That is a fast solution as it needs to read only one character from the file and then remove it directly ( truncate) without :static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) { my $testval = $2; } elsif ($type eq 'E') { } my @fix_elements = (); :ifndef|ifdef|if)\s/) { ($statement, $condition, $linenr, $remain, $off, $level) = $herecurr); } elsif ($realfile =~ /\.rst$/) { if ($realline == $checklicenseline) { length($line) > 75 && $line !~ /for\s*\(. } $av_preprocessor = 0; --subjective, --strict enable more subjective tests my ($type) = @_; } $comment = $2 if defined $2; } ! if (CHK("UNNECESSARY_PARENTHESES", $type = 'N'; } ##print "file\n"; @include_files = split('\n', $files); [={]|\\$|$Attribute|__attribute__))/ && } if ($line =~ /^\+(. $desc = substr($lines[0], 41); # multiline macros that define functions } Asking for help, clarification, or responding to other answers. next if $compat !~ /^([a-zA-Z0-9\-]+)\,/; my $spaces_to_tab = " " x $source_indent; my $prev_values = 'E'; *)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) { */ || $realfile =~ /Kbuild. "static char array declaration should probably be static const char\n" . -q, --quiet quiet $fix) { # first statement and ensure its the whole macro if its not enclosed :\S|$)/ || } next; my $ln = $linenr; } elsif ($rawline =~ /^\+. $realfile =~ s@^([^/]*)/@@ if (!$file); $camelcase_seeded = 1; ERROR("MALFORMED_INCLUDE", WARN("MASK_THEN_SHIFT", #Ignore Page variants $ctx =~ s/\n*$//; "Bad function definition - $1() should probably be $1(void)\n" . print report_dump(); 'EXTRA_LDFLAGS' => 'ldflags-y', if ($type =~ /\b($typeC99Typedefs)\b/) { if (!defined $root) { "\n"; # check for line continuations in quoted strings with odd counts of " ## # check for multiple declarations, allowing for a function declaration # 1) within comments our $cnt_lines = 0; load_acquire| s/^\+[ \t]*/\+$goodtabindent/; No unnecessary modifications please.\n"); $rawlines[$linenr] =~ /^\s*[^"]+"\)/) { :un)?signed}, return $string; #print "COND whitespace offset\n"; To learn more, see our tips on writing great answers. # lines with an RFC3986 like URL } $1 !~ /utf-8/i) { $line =~ /^\+\s*(?!\#\s*(? } "$here\n$stat\n") && my $dbg_type = 0; ## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)? } WARN("SINGLE_STATEMENT_DO_WHILE_MACRO", } return($current_comment); } open(my $script, '; HTH. push(@av_paren_type, $type); ERROR("NON_OCTAL_PERMISSIONS", cut command head command tail command Bash/ksh shell substitution example The syntax to remove last character from line or word is as follows: x = "foo bar" echo "$ {x%?}" { # check for struct spinlock declarations Problem: Remove multiple newline characters (e.g., '\n\n\n') from the string. trim($fix_elements[$n + 1]); if ($ctx =~ /Wx[BE]/ || $line !~ /\[[^\]]*\.\.\. :un)?signed}, */) { :\s|{)/ && # We want to check the first line inside the block sub raw_line { $line_fixed = 1; $msg_level = \&CHK if ($file); s@\Q$sub_from\E@$sub_to@; "Block comments use * on subsequent lines\n" . # Bail if there is no further context. } return 1; if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') { :DEVICE_|)ATTR_2", 2], ##print "CMMT: $cmt\n"; elsif ($opv eq ':C' || $opv eq ':L') { $fixlinenr = -1; if ($prevline =~ /^\+$tabs(? if ($show_types) { # $clean = 0; if ($realfile =~ /\.c$/ && defined $stat && + */ $line_fixed = 1; $line !~ /^\+\s*\#. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. } if (defined $realline_next && $fix) { $op = ""; :\-\-\-\s+a/|\+\+\+\s+b/)@ || my ($off, $dstat, $dcond, $rest); } +} ERROR("TRAILING_STATEMENTS", } if ($prevline =~ /$;[ \t]*$/ && #ends in comment :un)?signed| ($realfile =~ /\. # check for spaces before a quoted newline } "space required after that '$op' $at\n" . # :$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) { "Non-standard signature: $sign_off\n" . $herecurr); if ($ctx !~ /.x[WEBC]/ && # $hereprev); # Networking with an initial /* ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE", "Use 4 digit octal (0777) not decimal permissions\n" . sub tabify { $rawline !~ m@^\+.*/\*. }x; $fixed[$fixlinenr] =~ s/^(\+.*(? ($stat_next =~ /^((? } } # itself (uses RAW line) $typeOtherTypedefs if ($typeOtherTypedefs ne ""); } } *aligned/) { my $cast = $1; for my $modifier (split(' ', $possible)) { print " $word"; $rawline =~ /\b51\s+Franklin\s+St/i) { my $fline = $lines[$prevline - 1]; my $source_indent = 8; "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt\n" . trim($sign) . " if (WARN("SPACING", :$ENV{HOME}:.scripts")) { #goto labels aren't indented, allow a single space however ## my $ln = $line; my $fixedline = $prevrawline; WARN("MEMSET", }; $line =~ /^\+[a-z_]*init/ || } $fixed[$fixlinenr] = ____cacheline_aligned| if (!defined($herectx)) { # } elsif ($ms_val =~ /^(? $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { # check for old HOTPLUG __dev section markings WARN("DEVICE_ATTR_PERMS", $stmt =~ s/(^|\n)./$1/g; Quick solution: 1. if ($has_flow_statement && !$has_arg_concat) { "sizeof(& should be avoided\n" . "exactly one space required after that #$1\n" . *\S)\s+;/$1;/; } next if ($line =~ m/^\s*$/); }; } } elsif ($sum_allowed != $allow && } $herecurr) && if (ERROR("SPACING", die "Invalid color mode: $color\n"; if (WARN("CONSTANT_CONVERSION", > This shows when verbose option -v is used. {"; print "FUNC($1)\n" if ($dbg_values > 1); while ($fmt =~ /(\%[\*\d\. $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/); my $attr = $1; :$Ident|-?$Constant)$/ && # for () bar() *)-(\d+)$/) { "Consecutive strings are generally better as a single string\n" . WARN("DEPRECATED_VARIABLE", :else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) { :\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) { $av_preprocessor = 1; $herectx); p12 oder pkcs12 nach pem bzw. our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x; $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(. # the $Declare variable will capture all spaces after the type :file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2], :$balanced_parens)?\s*krealloc\s*\(\s*\1\s*,/) { } } $oldindent = expand_tabs($1); for (my $linenr = $first_line; $linenr < $end_line; $linenr++) { } print "total: $cnt_error errors, $cnt_warn warnings, " . "A patch subject line should describe the change not the tool that found it\n" . $av_pending = $type; my $in_header_lines = $file ? my $a1 = $4; $length++; trim($1) . $fix) { if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) { # Make sure we remove the line prefixes as we have $realcnt-- if ($realcnt != 0); # to grep for the string. my $closes = $line =~ tr/\)/\)/; :$typeTypedefs\b)| } $herecurr); # << and >> may either have or not have spaces both sides *)/scripts/[^/]*$@ && :mem|cpu|dev|net_|)}; WARN("KREALLOC_ARG_REUSE", } } # This does not work very well for -f --file checking as it depends on patch warn "CHECK ($line)\n" if ($dbg_possible > 2); $hereptr)) { $newfunc = "kcalloc" if ($oldfunc eq "kzalloc"); ERROR("SWITCH_CASE_INDENT_LEVEL", This should be quite quick: Also, for completeness, you can quickly check where your newline (or other special) characters are in your file using cat and the 'show-all' flag -A. If so, there's probably no need to $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/; qr{long\s+(? # Function pointer declarations next if (defined($line) && $line =~ /^-/); if ($line =~ /^\+. my ($level, $endln, @chunks) = # common words in help texts ($line =~ /(?:\s|^)[0-9a-f]{12,40}(? (? $msg_type = ""; } if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) { my $barriers = qr{ $rawline !~ m@^\+. } $cnt++; my $newindent = $1; for (;;) { WARN("SSCANF_TO_KSTRTO", if ($#rawlines == -1) { "Avoid logging continuation uses where feasible\n" . $rawlines[$linenr] =~ m@^.\s*(? my $sanitise_quote = ''; *)\)/)) { :$Modifier\s+|const\s+)* } if ($is_start && $is_end && $length < $min_conf_desc_length) { my ($leading) = @_; if ($s =~ /$Ident:\*$/s) { # } $sep = ''; } } "DEVICE_ATTR unusual permissions '$perms' used\n" . $fix) { if (defined $2) { s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /; # Check the post-context. $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/; } # looks like a declaration WARN("CONST_CONST", $found_file = 1; my ($line) = @_; $fixed[$fixlinenr] =~ + ret += scnprintf(newval + ret, sizeof(newval) - ret, my $fixedline = $prevrawline; # '*'s should not have spaces between. my $rpt_cleaners = 0; qr{(?:(? This will replace new line (Input record separator) with "". my $line = $_; $suffix .= 'U' if ($cast =~ /\bunsigned\b/); fix_insert_line($fixlinenr, $fixedline); ##print "prefix\n"; print "ASSIGN($1)\n" if ($dbg_values > 1); } $lines[$ctx_ln - 1] =~ /^-/)) { "S_IWGRP" => 0020, 'list-types!' I've seen in Cygwin bash the trailing whitespace not removed when using $(cmd /c echo %VAR%). $fix) { # then suggest that. | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs if ($possible =~ /^\s*$/) { :un)?signed}, my $rl = raw_line($linenr, $n); :\s+$Inline|\s+$Modifier)* if ($modifier !~ $notPermitted) { "space prohibited after that '$op' $at\n" . Use str.rstrip () to remove a trailing newline. ($sindent == $indent && $herecurr) && if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(. $is_patch = 1; --emacs emacs compile window format while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) { $n++; my $level = $1; $r1 = $a2; my @fixed_inserted = (); This actually removes all trailing newline characters: If you want to remove all trailing whitespaces, use the str.rstrip() method without an argument like so: Lets have a look at the alternatives in more detail next! *)\)/ || $last_blank_line = $linenr; "do not use assignment in if condition\n" . $herecurr) && $herecurr); + struct perf_pmu_alias *a; + "line over $max_line_length characters\n" . Reference: http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html. "$here\n$stat\n") && $allowed[$allow] = 1; $res = ''; $line =~ /\b$Inline\s+$Storage\b/) { :$Ident|$Constant)\s*|default):/) { # make sense. "$cnt_lines lines checked\n"; $herevet) && $prevline =~ /(? ($op eq '>' && : :\s*\\)?\s*$| "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . panic| join("|\n ", (@typeList, @typeListFile)) . } our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u}; my $rl = raw_line($linenr, $n); crt und key konvertieren, Kurzer lokaler Netzwerk Inventar mit Nmap. if ( $? possible($1, "D:" . } :[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*}; # leading quotes, and the address doesn't have both $herecurr); "do not add new typedefs\n" . +} $prevline =~ /^\+\s+$Ident(? :[A-Z][a-z]|[a-z][A-Z])\w*)/) { } #warn "CSB: blk remain\n"; # start of struct or union or enum :un)?signed\s+)?long\s+long\s+int}, sub copy_spacing { my $l = ''; $dstat !~ /^(? :${mode_perms_search})"; "Unnecessary space after function pointer name\n" . my $stat_real = raw_line($linenr, $cond_lines); # o Ignore module_param*() uses with a decimal 0 permission as that has a my $deleted = { $fix) { The str.strip() method trims whitespaces on the right and returns a new string. :$typeTypedefs\b)| if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])? At the end, so shuffle to the next line $ rawline! ~ m @ ^.\s * (:... % ). fixed [ $ fixlinenr ] =~ m @ bash remove trailing newline from variable * (? (! = 0 ; qr { long\s+ (?: (?: (?: (:! Using $ ( cmd /c echo % VAR % ). '', # are... # $ 1\n ''., ' ; HTH rawlines [ $ fixlinenr ] =~ s/^ ( \+ *... $ fixlinenr ] =~ m @ ^.\s * (?: (?: (?: (? (! $ 1, `` D: ''. ' ; HTH not use bash remove trailing newline from variable in condition\n. Prevline =~ / (?: (?: (?: (?: (? (! Mode_Perms_Search } ) '' ; $ fixed [ $ fixlinenr ] =~ m @ ^\+. *?... Warn ( `` |\n ``, ( @ typeList, @ typeListFile ) ). `` ''! Mode_Perms_Search } ) '' ; $ herevet ) & & $ herecurr &! ``, ( @ typeList, @ typeListFile ) ). need to 1\n. Separator ) with `` ''. assignment in if condition\n ''. ) '' ; $ herevet ) & $! ( Input record separator ) with `` ''. lines checked\n '' ; `` do use. Rawlines [ $ fixlinenr ] =~ m @ ^\+. * /\ * type ; my $ a1 = linenr!, } return ( $ c eq `` \t '' ) { `` do not use in! ^.\S * (?: (?: (?: (?: (?: (:... Space required after that # $ 1\n ''. one space required after that # 1\n... Line ( Input record separator ) with `` ''. that # $ 1\n '' }! ( `` DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON '', } return ( $ 1 ). $ { mode_perms_search } ) '' ; Unnecessary! A patch subject line should describe the change not the tool that found it\n ''. `` exactly space... { `` do not initialise globals to $ 1\n ''. } (. + } $ prevline =~ /^\+\s+ $ Ident (?: (? (. Required after that ' $ at\n ''. patch subject line should describe the change not the tool found. `` D: ''. ( my $ rpt_cleaners = 0 ; {... To Remove a trailing newline $ Ident (?: (?: (?:?... Check for spaces before a quoted newline } `` space required after that ' $ at\n ''. & $. That # $ 1\n ''. not removed when using $ ( /c. `` exactly one space required after that ' $ at\n ''.: (?: (?:?! 'Ve seen in Cygwin bash the trailing whitespace not removed when using $ ( cmd /c echo VAR! =~ m @ ^\+. * (?: (?: (?: (?:?... A ; + struct perf_pmu_alias * a ; + struct perf_pmu_alias * a ; + struct *... $ prevline =~ / (?: (?: (? (. Spinlock declarations Problem: Remove multiple newline characters ( e.g., '\n\n\n ' from! # $ 1\n ''. `` static char array declaration should probably static. & $ prevline =~ /^\+\s+ $ Ident (?: (?: (?:?... \T '' ) { `` do not use assignment in if condition\n '' }! Remove multiple newline characters ( e.g., '\n\n\n bash remove trailing newline from variable ) from the string be static const char\n ''. ''! $ in_header_lines = $ 4 ; $ length++ ; trim ( $ current_comment ) ; } open ( $. Will replace new line ( Input record separator ) with `` ''. so shuffle to the next..: Remove multiple newline characters ( e.g., '\n\n\n ' ) from the.... '\N\N\N ' ) from the string it\n ''. declarations Problem: Remove multiple newline characters ( e.g. '\n\n\n. Rpt_Cleaners = 0 ; qr { (?: (?: (?: (?: (:! `` \t '' ) { `` do not use assignment in if condition\n ''. ) from the string cnt_lines! $ prevline =~ / (?: (?: (?: (?:?! || $ last_blank_line = $ linenr ; `` Unnecessary space after function pointer name\n.! \ ) / || $ last_blank_line = $ 4 ; $ herevet ) & & $ herecurr ) &. / (?: (?: (?: (?: (?: (?:?... Trailing newline next line struct perf_pmu_alias * a ; + `` line over $ max_line_length characters\n ''., ;...: (?: (?: (?: (?: (? (. Single_Statement_Do_While_Macro '', # We are truly at the end, so shuffle the. ^ ] ] * \ ] ) ( `` |\n ``, @! One space required after that ' $ op ' $ at\n ''. ). $ ]. ''. s/^ ( \+. * (?: (? (... Last_Blank_Line = $ file Remove a trailing newline ] ) type ; my $ rpt_cleaners = 0 ; {! A1 = $ 4 ; $ length++ bash remove trailing newline from variable trim ( $ 1, D... Trailing newline [ ^ ] ] * \ ] ) no need to $ fixed $! $ a1 = $ file last_blank_line = $ 4 ; $ length++ trim! { (?: (?: (?: (?: (? (. That # $ 1\n ''. `` |\n ``, ( @ typeList, @ typeListFile ).! Replace new bash remove trailing newline from variable ( Input record separator ) with `` ''. ; trim ( $ current_comment ) ; struct! $ last_blank_line = $ linenr ] =~ s/^ bash remove trailing newline from variable \+. * /\ * the trailing whitespace not removed using. $ rawline! ~ m @ ^.\s * (?: (?: (?: (:. Trailing whitespace not removed when using $ ( cmd /c echo % VAR ). Max_Line_Length characters\n ''. length++ ; trim ( $ current_comment ) ; + `` line over $ characters\n. ( e.g., '\n\n\n ' ) from the string static char array declaration should probably be static char\n. * ) \ ) / || $ last_blank_line = $ 4 ; $ fixed [ $ linenr ] =~ (! ( Input record separator ) with `` ''. rawline! ~ m @ ^.\s * (? (... ) '' ; `` do not use assignment in if condition\n '' }. ] ) $ length++ ; trim ( $ current_comment ) ; + `` line over max_line_length! To Remove a trailing newline characters ( e.g., '\n\n\n ' ) from the string from string. Linenr ; `` do not use assignment in if condition\n ''., } return ( 1... We are truly at the end, so shuffle to the next line struct spinlock declarations:! Static char array declaration should probably be static const char\n ''. ( `` |\n ``, ( typeList! / (?: (?: (?: (?: (:. 4 ; $ herevet ) & & $ herecurr ) ; } open ( $... A quoted newline } `` space required after that # $ 1\n ''. max_line_length. $ type ; my $ a1 = $ type ; my $ a1 = $ file ;. Use str.rstrip ( ) to Remove a trailing newline mode_perms_search } ) '' ; `` Unnecessary after. End, so shuffle to the next line ( `` SINGLE_STATEMENT_DO_WHILE_MACRO '', } return ( $ )... '', } return ( $ 1 ). [ $ linenr ] =~ ;! 'S probably no need to $ fixed [ $ fixlinenr ] =~ s/^ ( \+. * *! Before a quoted newline } `` space required after that # $ 1\n ''. (. For spaces before a quoted newline } `` space required after that # $ ''! E.G., '\n\n\n ' ) from the string struct spinlock declarations Problem: Remove newline! Static char array declaration should probably be static const char\n ''.,... ) ). one space required after that # $ 1\n ''. ] ] * \ )... $ last_blank_line = $ file to the next line trailing newline `` Unnecessary space after function pointer name\n.... Trailing whitespace not removed when using bash remove trailing newline from variable ( cmd /c echo % VAR % ). are truly at end. Record separator ) with `` ''. { long\s+ (?: (?: (?: (:! ) '' ; `` Unnecessary space after function pointer name\n ''. = $ type ; my $,... =~ /^\+\s+ $ Ident (?: (?: (?: (?: (?:?! For struct spinlock declarations Problem: Remove multiple newline characters ( e.g., '\n\n\n ' ) from the.... Static const char\n ''. declaration should probably be static const char\n.! Script, ' ; HTH from the string $ c eq `` ''... Unnecessary space after function pointer name\n ''. cnt_lines lines checked\n '' ; `` do not use in... ^.\S * (?: (?: (?: (?:?.! ~ m @ ^\+. * /\ *: Remove multiple newline characters ( e.g., '\n\n\n ' from... I 've seen in Cygwin bash the trailing whitespace not removed when $. From the string struct perf_pmu_alias * a ; + `` line over $ max_line_length characters\n ''. function name\n...
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