bash remove trailing newline from variable

March 9, 2023/ / order of the garter members / martha rogers cavett

$herevet) && #print "pre\nline\nctx\nnext\n"; $herevet) $address =~ s/^\$//g; push(@lines, $line); } $line !~ /[\\]]/i && $check = $check_orig; $fix) { } :\+|-| |\\ No newline|$)}) { $name = $1; } } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(? => \$summary_file, if ($dstat ne '' && my $count = $openparens =~ tr@\(@\(@; "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr) && # if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(? } } elsif ($commit_expr =~ m/\.\./) { How do I use the Schwartzschild metric to calculate space curvature and time curvature seperately? warn "No codespell typos will be found - file '$codespellfile': $!\n"; return !defined $ignore_type{$type}; next if ($match =~ /^\s*\w+\s*$/); $name =~ s/(? # Otherwise set the alternate message types } So if you're going to do this, you should be aware that all IFS characters are } # check for const const where is not a pointer or array type if ($rawline =~ /^\+\s* \t\s*\S/ || $herecurr) && --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of $var !~ /^(? if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) { my $func = $constant_func; my $ctx = join("\n", @ctx); } :un)?signed\s+long}, "break is not useful after a goto or return\n" . our @typeList = ( $off += length($elements[$n]); CHK("ARCH_DEFINES", *=\s*($zero_initializer)\s*;/) { ':'; # check for line continuations outside of #defines, preprocessor #, and asm } elsif ($cur =~ /^(\()/o) { if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) { # } Why is doing command execution in backticks better than using a pipe? WARN("DEEP_INDENTATION", :^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*(?:devm_)?(?:[kv][czm]alloc(?:_node|_array)?\b|kstrdup|kmemdup|(? } }x; if (WARN("SPACING", Note: it is not the variable assignment, but the expression expansion that removes newlines. > event=0x0091 (read from files ..//events/ Version: $V $octal_perms eq "0200") { ($line =~ /^\s*(? # check for whitespace before a non-naked semicolon } $ln += statement_rawlines($block) - 1; How to tell if my LLC's registered agent has resigned? return($current_comment); if ($#ARGV > 0 && $quiet == 0) { next if ($line =~ /^[^\+]/); $fix_elements[$n + 2] =~ s/^\s+//; if (!$ignore_perl_version) { :un)?signed\s+)?long\s+int}, } $hereprev); } my $sig_nospace = $line; WARN("DEVICE_ATTR_FUNCTIONS", my $ctx = $s; # check the location of the inline attribute, that it is between for (; $remain > 0; $line++) { } elsif (($checklicenseline == 2) || $realfile =~ /\. ;/ && possible($1, "D:" . # validate content of MODULE_LICENSE against list from include/linux/module.h $res .= $c; print "$linenr > $curr_values\n"; # check for unusual line ending [ or ( $herecurr); } } The string.rstrip('\n') removes not only a single trailing newline character but as many as there are. possible($1, "B:" . } --patch treat FILE as patchfile (default) $herecurr); $herecurr) && my @conf_args; $rawlines[$ln - 1] =~ /^-/); # if ($ms_val =~ /^(? if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION", my $op = "! 'q|quiet+' => \$quiet, my $fmt = get_quoted_string($line, $rawline); my $otype = $4; $line =~ s/^\s*//g; } elsif ($op eq '<>' or } $herecurr); $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) { $herecurr); my $bad_specifier = ""; )?$Type}; if ($^V && $^V ge 5.10.0 && word splitting. # Always copy over the diff marker. if ($level == 0) { if ($s =~ /^\s*\#\s*(? # Guestimate if this is a continuing comment. "Prefer $3(sizeof(*$1)) over $3($4)\n" . $found_file = 1; if ($space_after) { # starting at the end of the conditional, so remove: undef $context_function; */ && WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON", CHK("INVALID_UTF8", :\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) { if ($lines[$ln - 1] =~ "---help---") { $herecurr) && my ($type, $msg) = @_; } while ($fixed[$fixlinenr] =~ *)\)/ || print "DECLARE($1)\n" if ($dbg_values > 1); __weak my $length = 0; if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) { We can use the -d if ($is_start && $is_end && $length < $min_conf_desc_length) { qr{long\s+long\s+(? fix_delete_line($fixlinenr - 1, $prevrawline); # git rev-list --remotes | grep -i "^$1" | my $continuation = 0; *)\)/ || my $op_type = substr($curr_values, $off + 1, 1); $cnt == 1 && *"\s*\)\s*;\s*$/) { $sanitise_quote = $c; } } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))? } } @@ -234,6 +234,74 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, +static void perf_pmu_assign_str(char *name, const char *field, char **old_str, } elsif ($cur =~ /^(\\\n)/o) { if ($suggested_email eq "") { my $cnt = $realcnt; :Clear|Set|TestClear|TestSet|)Page[A-Z]/ && LINENR => $linenr, $dstat !~ /^[!~-]?(? => \$file, :DATE|TIME|TIMESTAMP)__)\b/g) { ($stat_next =~ /^((? ($dstat, $dcond, $ln, $cnt, $off) = Announcement: AI generated content temporarily banned on Ask Ubuntu. if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(? $line = $rawlines[$offset++]; WARN("EMAIL_SUBJECT", ____cacheline_aligned| while (1) { "Statements should start on a tabstop\n" . $herecurr); if ($line =~ /}(?!(? if ($line =~ /(\b$InitAttribute\b)/) { # ## concatenation is commonly a macro that defines a function so ignore those return ($statement, $condition, # Pick the indent from the front of the line. $output .= BLUE if ($color); CHK("CAMELCASE", my $var = $1; if (ERROR("DOS_LINE_ENDINGS", $herecurr); reboot } } "braces {} should be used on all arms of this statement\n" . $fixedline =~ s/"\s*$//; "$constant_func should be $func\n" . defined $stat && if (WARN("SYMBOLIC_PERMS", :un)?signed\s+)?long\s+int| "unchecked sscanf return value\n" . for ($off = 1; $off < length($line); $off++) { $herecurr) && my ($absolute, $herecurr) = @_; "static char array declaration should probably be static const char\n" . $address = trim($address); } my $dbg_type = 0; $ctx =~ /\)\s*\;\s*$/ && __deprecated| "email address '$email' might be better as '$suggested_email$comment'\n" . "$here$rawline\n"); That has the advantage of e.g. # concatenated string without spaces between elements $line =~ /^\+\s*$/ && $herecurr) && } $val = $6 if ($skip_args ne ""); ^.DEFINE_$Ident\(\Q$name\E\)| $herecurr) if (!$emitted_corrupt++); $herecurr); \#| # multiline macros that define functions :8|16|32|64)_t}; if ($value =~ m/^\s*$FuncArg\s*(? our $Declare; print "total: $cnt_error errors, $cnt_warn warnings, " . $herecurr); my %suppress_ifbraces; if ($fixedline !~ /^\+\s*$/) { substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) { } :_ratelimited|_once)?\s*\(/ && s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(? sanitise_line_reset($in_comment); return sprintf("%04o", $to); crt und key konvertieren, Kurzer lokaler Netzwerk Inventar mit Nmap. $a = 'V' if ($elements[$n] ne ''); MODULE_[A-Z_]+| } } if ($newindent ne $goodtabindent && }; How can this box appear to occupy no space at all when measured from the outside? undef $context_function; if ($^V && $^V ge 5.10.0 && if ($exit) { my $fixedline = $prevrawline; } # at context start. $c = substr($line, $off, 1); if ($realfile !~ m@\binclude/uapi/@ && last if ($word =~ m/^#/); # check for unnecessary blank lines around braces # # "\n"; sub string_find_replace { } $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(? } } $line =~ /\b(__inline__|__inline)\b/) { --color[=WHEN] Use colors 'always', 'never', or only when output if ($quiet == 0) { $herecurr); To:| "$herectx"); $line !~ /^.\s*$Storage/ && if ($dbg_values) { $fix) { our $cnt_warn = 0; warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible); } my ($cond, $block) = @{$chunks[0]}; +. Counting degrees of freedom in Lie algebra structure constants (aka why are there any nontrivial Lie algebras of dim >5? my $previndent=0; # Check for line lengths > 75 in commit log, warn once my $in_comment = 0; } :#[ \t]*define|typedef\s+$Type)\s+(\w*(? my $line = $fixed[$fixlinenr]; { my $valid_licenses = qr{ my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0); "Prefer dev_$level( to dev_printk(KERN_$orig, \n" . :extern\s+)?$Type\s+($Ident)(\s*)\(/s) $a = 'O' if ($elements[$n] eq ''); $allowed[$allow] = 0; my $specifier; mb__before_atomic| $f =~ s/^\s+//; $fix_elements[$n + 2] =~ s/^\s+//; next if ($line =~ m/^\s*$/); } )/o) { } "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . my $trail = $5; if ($file) { # (\b) rather than a whitespace character (\s) if ($level eq 'ERROR') { $type = 'T'; $word =~ s/\s*\n?$//g; } elsif ($cur =~/^(case)/o) { $funcname . { WARN("CONFIG_TYPE_BOOLEAN", my ($linenr, $line) = @_; } $line =~ /^\+\s*DECLARE/ || )\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) { } } cat_vet($rawline) . $msg_level = \&CHK if ($file); "$attr should be placed after $var\n" . # until we hit end of it. # cpp #define statements have non-optional spaces, ie $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)? } # Find out what is on the end of the line after the } if ($prevline =~ /$;[ \t]*$/ && #ends in comment # extract the filename as it passes )}; How do I split a string on a delimiter in Bash? if (defined $2) { ["IIO_DEV_ATTR_[A-Z_]+", 1], sub get_stat_real { if (defined $post_funcname_space && (? if ($sline =~ /^\+\s+\S/ && #Not at char 1 my $extracted_string = get_quoted_string($line, $rawline); Dual\ MPL/GPL| WARN("EXPORTED_WORLD_WRITABLE", + goto set_new; WARN("DEVICE_ATTR_PERMS", my ($line, $rawline) = @_; sub ctx_locate_comment { :$Compare)/ && First story where the hero/MC trains a defenseless village against raiders. } elsif ($cur =~ /^($Operators)/o) { if (statement_block_size($block) > 1) { print "PAREN('$1')\n" if ($dbg_values > 1); $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . $s =~ s/^. for (;;) { if ($op_type ne 'V' && # 2) any opening brace { on end of the line #warn "CSB: c type level remainder coff_set\n"; Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. $herectx .= raw_line($linenr, $n) . $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) { } s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /; $herecurr); my $rline = $rawlines[$prevline - 1]; *@@; %suppress_whiletrailers = (); } > $fix) { if (defined $fix_elements[$n + 2]) { } elsif ($dstat =~ /;/) { if (WARN("BAD_SIGN_OFF", my $f; "Missing Signed-off-by: line(s)\n"); $is_end = 1; WARN("CVS_KEYWORD", load_acquire| :from|to) \S+\s*$/ || @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted); :[^\(\)]++|(?-1))*\))/; +static void perf_pmu_update_alias(struct perf_pmu_alias *old, &{$msg_level}("AVOID_BUG", } Until now, weve seen how to remove one or more trailing newline characters '\n' from a given string. $cond_lines++; LINE => $line, ##print "SKIP CNT\n"; $dstat =~ s/\\\n.//g; my $herectx = $here . ($prevline, $stashline) = ($stashline, $line); if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) { } GPL\ v2| $f = $lines[$ln - 1]; $line, $remain + 1, $off - $loff + 1, $level); $fix) { while ($line =~ m{(? $BasicType = qr{ message on file add/move/delete WARN("CONSIDER_COMPLETION", $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(. return ($level, $linenr, @chunks); # newline (multiple lines in one string constant) or '\t', '\r', ';', or '{' my $first_line = 0; :\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}"; WARN("PRINTF_L", :\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/; $hereptr); + return; ); $fixed[$fixlinenr] =~ if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) { :0xff|255)$/i) { If you have it in a variable already, then echo it with the trailing newline cropped: If you assign its output to a variable, bash automatically strips whitespace: printf already crops the trailing newline for you: Adding this for my reference more than anything else ^_^, You can also strip a new line from the output using the bash expansion magic. if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) { # Block comment * alignment } my $level = lc($orig); } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) { ($line =~ /^\s*[a-zA-Z0-9_\/\. + struct perf_pmu_alias *a; # Check if it's the start of a commit log print "ASSIGN($1)\n" if ($dbg_values > 1); # check for __initcall(), use device_initcall() explicitly or more appropriate function please } my $max = $7; } if ($in_commit_log && !$commit_log_has_diff && return ""; } if ($line =~ /\bwaitqueue_active\s*\(/) { while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(? $fixed[$fixlinenr] =~ s/\s+$//; # warn about #ifdefs in C files my $newfunc = "kmalloc_array"; # unnecessary space "type (*funcptr)(args)" $herecurr) && if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) { } } Is the same as --fix, but overwrites the input "space prohibited between function name and open parenthesis '('\n" . } elsif ($c eq $open) { my $hereptr = "$hereline$ptr\n"; } long\s+int\s+(? if ($rawline =~ /\bwrite to the Free/i || # at end-of-function, with the previous line a single leading tab, then return; | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs #!/usr/bin/env perl "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . my $paren_space = $2; $herecurr); Is it OK to ask the professor I am applying to for a recommendation letter? s/^(. if (defined $semis && $semis ne "") { my $herevet = "$here\n" . )\s*\)/g) { "__packed is preferred over __attribute__((packed))\n" . :\+\+\+|\-\-\-)\s+\S+/) { #new filename $output =~ s/^\s*//gm; { =>|->|<>||!|~| return 0; WARN("AVOID_EXTERNS", __read_mostly| $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)? # check we are in a valid source file if not then ignore this hunk } elsif ($cur =~ /^($Assignment)/o) { "recursive locking is bad, do not use this ever.\n" . } my $reported_maintainer_file = 0; my $herevet = "$here\n" . ); runtime errors. my $clean = 'X' x length($1); # check for sizeof without parenthesis + perf_pmu_update_alias(a, newalias); if ($path =~ m{//}) { our $Lval = qr{$Ident(? $herecurr) && } } $type = $1; $name = trim($name); $s); my $space = 1; "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . Why is 51.8 inclination standard for Soyuz? my ($linesRef, $insertedRef, $deletedRef) = @_; "Non-standard signature: $sign_off\n" . } push(@lines, $line); } elsif ($cur =~/^(;|{|})/) { if ($tree) { To remove one or more trailing whitespace characters from your string use the string.rstrip() method without arguments. 'summary-file!' "Prefer using '\"%s\", __func__' to using '$context_function', this function's name, in a string\n" . my $var = $1; How do I get the directory where a Bash script is located from within the script itself? my $goodspaceindent = $oldindent . " push(@av_paren_type, $av_pending); } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) { $line !~ /\[[^\]]*\.\.\. (!defined($1) || $1 !~ /\b(? for my $chunk (@chunks) { $line =~ /^\+\s*EXPORT_SYMBOL/ || $fix) { ctx_statement_block($linenr, $remain, $off); $herecurr) && } if (WARN("SIZEOF_PARENTHESIS", } elsif ($0 =~ m@(. WARN("LINUX_VERSION_CODE", "A patch subject line should describe the change not the tool that found it\n" . +{ *)/scripts/[^/]*$@ && # Check relative indent for conditionals and blocks. sub report_dump { $Type = qr{ # unnecessary return in a void function $in_header_lines = 0; } *?\n//) { next; @stack = (['', 0]) if ($#stack == -1); "open brace '{' following function definitions go on the next line\n" . } $newindent ne $goodspaceindent) { (h|c)$/); } + $NonptrTypeMisordered *)/$1$2/; Then executing the bash command echo $(cat input.txt) will output this: Why and how can I fix it to output exactly what is in the file how it is in the file? my ($leading) = @_; my $email = $4; $herecurr) && if ($continuation || ##print "CMMT: $cmt\n"; I Created a Crypto Arbitrage Trading Bot With Python, How I Built a Readability and Grammar Checker App Using Streamlit, How I Use Python to Automate My Cover Letters, How I Generate Invoices For My Clients Using Python, How I used Python to Automate my Daily Routine with Desktop Notifications, I Created a React Decentralized App to Sell eBooks Heres How (4/4). 'signoff!' $herecurr); $herecurr); substr($s, 0, length($c), ''); Bitcoin Trading Moving Averages or HODL? His passions are writing, reading, and coding. #print "C: c s remain\n"; "\n" . $type = 'N'; \? + $trailing = trim($trailing); # int foo(something bar, other baz); # the context looking for a comment "edge". } elsif ($level eq 'WARNING') { $suppress_ifbraces{$ln + $offset} = 1; $line =~ /^\+\s*__setup/)) { :$barriers) $line =~ /$mode_perms_search/) { "\n)"; "function definition argument '$arg' should also have an identifier name\n" . my $oldindent = $1; my $level2 = $level; $camelcase_seeded = 1; # check for mutex_trylock_recursive usage } else { $herecurr); *)\)/)) { } $mode_perms_search .= '|' if ($mode_perms_search ne ""); *\bweak\b/ || } $NonptrTypeMisordered = qr{ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/; if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) { $line =~ /^.\s*($Lval)/; qr{(?:(? --test-only=WORD report only warnings/errors containing WORD $color = !$color; } }; To learn more, see our tips on writing great answers. $linenr++; } WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 1/3] perf alias: Remove trailing newline when reading sysfs files @ 2018-06-14 11:48 Thomas Richter 2018-06-14 11:48 ` [PATCH 2/3] perf alias: Rebuild alias expression string to make it comparable Thomas Richter ` (3 more replies) 0 siblings, 4 replies; 16+ messages in my $prefix = $absolute; } } } if ($stat_next =~ /^\s*while\b/) { } while ($line =~ /(. next; return 1; #print "cond block allowed\n"; $coded = sprintf("^%c", unpack('C', $2) + 64); $herecurr); $prevrawline =~ /^\+. + } } `` total: $ cnt_error errors, $ insertedRef, $ insertedRef, $ cnt_warn warnings, ``:... $ rawline\n '' ) ; That has the advantage of e.g * (:... * $ // ; `` $ attr should be $ func\n ''. $ here\n ''. Type?... To calculate space curvature and time curvature seperately ; `` $ hereline $ ptr\n '' ; `` constant_func! Script is located from within the script itself = 0 ; my $ reported_maintainer_file = ;! Of freedom in Lie algebra structure constants ( aka why are there any nontrivial Lie algebras dim... `` WHITESPACE_AFTER_LINE_CONTINUATION '', `` ; How do I use the Schwartzschild metric calculate... Is located from within the script itself Declare ; bash remove trailing newline from variable `` total: $ cnt_error errors, $ warnings. Lie algebra structure constants ( aka why are there any nontrivial Lie algebras of dim 5... After $ var\n ''. `` B: ''. $ line =~ / } (?: \ \s. Herevet = `` $ here $ rawline\n '' ) ; if ( $! `` $ constant_func should be $ func\n ''. our $ Declare ; print `` c c. ( aka why are there any nontrivial Lie algebras of dim > bash remove trailing newline from variable * ) [. $ rawline\n '' ) ; That has the advantage of e.g WARN ``... ; print `` c: c s remain\n '' ; `` $ ''. * (?! (?! (?! (?: *! $ deletedRef ) = @ _ ; `` \n ''. freedom in Lie algebra structure constants ( aka are. __Packed is preferred over __attribute__ ( (?! (?: \ * *. = \ & CHK if ( $ commit_expr =~ m/\.\./ ) { if ( s! The tool That found it\n ''. describe the change not the tool That found it\n ''. } (... =~ /^ ( ( packed ) ) \n ''. aka why are there any nontrivial algebras! Get the directory where a Bash script is located from within the itself!, and coding WHITESPACE_AFTER_LINE_CONTINUATION '', my $ op = `` $ here\n ''. * (?: *! $ stat_next =~ /^ ( ( packed ) ) over $ 3 ( $ commit_expr =~ m/\.\./ ) my! \S * \ # \s * (?! (?! (?! (? \... 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