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- #!/usr/local/bin/gawk -f
- # @(#) fixactive.gawk 1.2 94/10/15
- # 94/07/25 john h. dubois iii
- # 94/08/04 Added all options.
- # 94/09/29 More checks on validity of input.
- # 94/10/15 Added s option.
-
- BEGIN {
- Name = "fixactive"
- Usage = "Usage: " Name " [-hnq] [-s<pattern>] template-file [active-file]"
- ARGC = Opts(Name,Usage,"hnqs:",1)
- if ("h" in Options) {
- printf \
- "%s: fix active file by comparing it to a template file.\n"\
- "%s\n"\
- "Any groups in template-file that are not in the active file are added,\n"\
- "with the same status as they have in the template file.\n"\
- "Any groups in the active file that are not in template-file are removed.\n"\
- "The new active file is written to the standard output.\n"\
- "Options:\n"\
- "-h: Print this help.\n"\
- "-n: Do not delete any groups from the active file even if they aren't\n"\
- " in template-file.\n"\
- "-s<pattern>: Don't delete groups that match the given pattern even if they\n"\
- " aren't in template-file. This can be used to preserve local groups.\n"\
- "-q: Do not print notice line for each line added to the active file.\n",
- Name,Usage
- exit
- }
- NoDel = "n" in Options
- Quiet = "q" in Options
- if ("s" in Options)
- Save = Options["s"]
- compare = ARGV[1]
- if (ARGC > 2)
- local = ARGV[2]
- else
- local = "/usr/lib/news/active"
- while ((ret = (getline < compare)) == 1) {
- sub("\015$","") # lines sometimes end in cr
- if (NF != 4)
- printf "Error in template-file: Not enough fields:\n%s\n",
- $0 > "/dev/stderr"
- else if ($2 !~ /^[0-9]+$/ || $3 !~ /^[0-9]+$/)
- # Check this even though it won't be used because it indicates
- # a garbage line.
- printf "Error in template-file: Bad article range:\n%s\n",
- $0 > "/dev/stderr"
- else if ($4 !~ /^([mynx]$|xm$|=)/)
- printf "Error in template-file: Bad status:\n%s\n",
- $0 > "/dev/stderr"
- else
- CompGrps[$1] = $0
- }
- if (ret) {
- printf "Error reading template-file '%s'. Exiting.\n",compare > \
- "/dev/stderr"
- exit 1
- }
- close(compare)
- while ((ret = (getline < local)) == 1) {
- if (NF == 4) {
- if ($1 in CompGrps || NoDel) {
- print $0
- delete CompGrps[$1]
- }
- else if (Save != "" && $1 ~ Save) {
- print $0
- delete CompGrps[$1]
- printf "Preserved group '%s'.\n",$1 | "cat 1>&2"
- }
- else
- printf "%s did not exist in template-file. Deleted.\n",
- $1 | "cat 1>&2"
- }
- else
- printf "Error in active file: Not enough fields:\n%s\n",
- $0 > "/dev/stderr"
- }
- if (ret) {
- printf "Error reading active file '%s'. Exiting.\n",local > \
- "/dev/stderr"
- exit 1
- }
- for (Group in CompGrps) {
- if (!Quiet)
- printf "%s did not exist in local file. Added.\n",
- Group > "/dev/stderr"
- split(CompGrps[Group],F)
- printf "%s %s %s %s\n",Group,"0000000000","00001",F[4]
- NumAdded++
- }
- printf "%d groups added from template-file.\n",NumAdded > "/dev/stderr"
- }
-
- # @(#) ProcArgs 1.2.1 94/06/11
- # 92/02/29 john h. dubois iii (john@armory.com)
- # 93/07/18 Added "#" arg type
- # 93/09/26 Do not count -h against MinArgs
- # 94/01/01 Stop scanning at first non-option arg. Added ">" option type.
- # Removed meaning of "+" or "-" by itself.
- # 94/03/08 Added & option and *()< option types.
- # 94/04/02 Added NoRCopt to Opts()
- # 94/06/11 Mark numeric variables as such.
- # 94/07/08 Opts(): Don't require any args if 'h' option is given.
-
- # optlist is a string which contains all of the possible command line options.
- # A character followed by certain characters indicates that the option takes
- # an argument, with type as follows:
- # : String argument
- # * Floating point argument
- # ( Non-negative floating point argument
- # ) Positive floating point argument
- # # Integer argument
- # < Non-negative integer argument
- # > Positive integer argument
- # The only difference the type of argument makes is in the runtime argument
- # error checking that is done.
-
- # The & option is a special case used to get numeric options without the
- # user having to give an option character. It is shorthand for [-+.0-9].
- # If & is included in optlist and an option string that begins with one of
- # these characters is seen, the value given to "&" will include the first
- # char of the option. & must be followed by a type character other than ":".
- # Note that if e.g. &> is given, an option of -.5 will produce an error.
-
- # Strings in argv[] which begin with "-" or "+" are taken to be
- # strings of options, except that a string which consists solely of "-"
- # or "+" is taken to be a non-option string; like other non-option strings,
- # it stops the scanning of argv and is left in argv[].
- # An argument of "--" or "++" also stops the scanning of argv[] but is removed.
- # If an option takes an argument, the argument may either immediately
- # follow it or be given separately.
- # "-" and "+" options are treated the same. "+" is allowed because most awks
- # take any -options to be arguments to themselves. gawk 2.15 was enhanced to
- # stop scanning when it encounters an unrecognized option, though until 2.15.5
- # this feature had a bug that caused problems in some cases.
-
- # If an option that does not take an argument is given,
- # an index with its name is created in Options and its value is set to "1".
- # If an option that does take an argument is given,
- # an index with its name is created in Options and its value
- # is set to the value of the argument given for it.
- # Options and their arguments are deleted from argv.
- # Note that this means that there may be gaps left in the indices of argv[].
- # If compress is nonzero, argv[] is packed by moving its elements so that
- # they have contiguous integer indices starting with 0.
- # argv[0] is not examined.
- # The number of arguments left in argc is returned.
- # If an error occurs, the global string OptErr is set to an error message
- # and -1 is returned.
- function ProcArgs(argc,argv,OptList,Options,compress,
- ArgNum,ArgsLeft,Arg,ArgLen,ArgInd,Option,Pos,NumOpt,Value,HadValue,
- NeedNextOpt)
- {
- # ArgNum is the index of the argument being processed.
- # ArgsLeft is the number of arguments left in argv.
- # Arg is the argument being processed.
- # ArgLen is the length of the argument being processed.
- # ArgInd is the position of the character in Arg being processed.
- # Option is the character in Arg being processed.
- # Pos is the position in OptList of the option being processed.
- # NumOpt is true if a numeric option may be given.
- ArgsLeft = argc
- NumOpt = index(OptList,"&")
- for (ArgNum = 1; ArgNum < argc; ArgNum++) {
- if ((Arg = argv[ArgNum]) !~ /^[-+]./) # Not an option; quit
- break
- delete argv[ArgNum]
- ArgsLeft--
- if ((Arg == "--") || (Arg == "++"))
- break
- ArgLen = length(Arg)
- for (ArgInd = 2; ArgInd <= ArgLen; ArgInd++) {
- Option = substr(Arg,ArgInd,1)
- if (NumOpt && Option ~ /[-+.0-9]/) {
- Option = "&"
- Arg = "&" Arg
- ArgLen++
- Pos = NumOpt
- }
- else if (!(Pos = index(OptList,Option)) || Option == "&") {
- OptErr = "Invalid option: -" Option
- return -1
- }
-
- # Find what the value of the option will be if it needs one
- if (NeedNextOpt = (ArgInd >= ArgLen)) # Value is the next arg
- Value = argv[ArgNum+1]
- else # Value is included with option
- Value = substr(Arg,ArgInd + 1)
-
- if (HadValue = AssignVal(Option,Value,Options,
- substr(OptList,Pos + 1,1),ArgNum < (argc - 1))) {
- if (HadValue == -1)
- return -1
- if (NeedNextOpt) {
- delete argv[++ArgNum]
- ArgsLeft--
- }
- break # Used up this option
- }
- }
- }
- if (compress != 0)
- PackArr(argv,ArgsLeft)
- return ArgsLeft
- }
-
- # Global variables: OptErr
- # Return value: -1 on error, 0 if option did not require an argument,
- # 1 if it did.
- function AssignVal(Option,Value,Options,ArgType,GotValue,Name,
- UsedValue,Err) {
- # If option takes a value...
- if (UsedValue = (ArgType ~ "[:*()#<>]")) {
- if (!GotValue) {
- if (Name != "")
- OptErr = "Variable requires a value -- " Name
- else
- OptErr = "option requires an argument -- " Option
- return -1
- }
- if ((Err = CheckType(ArgType,Value,Option,Name)) != "") {
- OptErr = Err
- return -1
- }
- # Mark this as a numeric variable; will be propogated to Options[] val.
- if (ArgType != ":")
- Value += 0
- }
- else
- Value = 1
- if (!(Option in Options)) # Do not overwrite previously assigned values
- Options[Option] = Value
- return UsedValue
- }
-
- # Option is the option letter
- # Value is the value being assigned
- # Name is the var name of the option, if any
- # ArgType is one of:
- # : String argument
- # * Floating point argument
- # ( Non-negative floating point argument
- # ) Positive floating point argument
- # # Integer argument
- # < Non-negative integer argument
- # > Positive integer argument
- # Returns null on success, err string on error
- function CheckType(ArgType,Value,Option,Name, Err) {
- if (ArgType == ":")
- return ""
- # A number begins with option + or -, and is followed by a string of
- # digits or a decimal with digits before it, after it, or both
- if (Value !~ /^[-+]?([0-9]+|[0-9]+?\.[0-9]+|[0-9]+\.)$/)
- Err = "must be a number"
- else if (ArgType ~ "[#<>]" && Value ~ /\./)
- Err = "may not include a fraction"
- else if (ArgType ~ "[()<>]" && Value < 0)
- Err = "may not be negative"
- else if (ArgType ~ "[)>]" && Value == 0)
- Err = "must be a positive number"
- if (Err != "") {
- if (Name != "")
- return "Value assigned to variable " Name " " Err
- else {
- if (Option == "&")
- Option = Value
- return "Value assigned to option -" Option " " Err
- }
- }
- else
- return ""
- }
-
- # Packs Arr to indices starting with 0
- # Num should be the number of elements in Arr
- function PackArr(Arr,Num, NewInd,OldInd) {
- NewInd = OldInd = 0
- for (; Num; Num--) {
- while (!(OldInd in Arr))
- OldInd++
- if (NewInd != OldInd) {
- Arr[NewInd] = Arr[OldInd]
- delete Arr[OldInd]
- }
- OldInd++
- NewInd++
- }
- }
-
- # Note: only the above functions are needed by ProcArgs.
- # The rest of these functions call ProcArgs() and also do other
- # option-processing stuff.
-
- # Opts: Process command line arguments.
- # Opts processes command line arguments using ProcArgs()
- # and checks for errors. If an error occurs, a message is printed
- # and the program is exited.
- #
- # Input variables:
- # Name is the name of the program, for error messages.
- # Usage is a usage message, for error messages.
- # OptList the option description string, as used by ProcArgs().
- # MinArgs is the minimum number of non-option arguments that this
- # program should have, non including ARGV[0] and +h.
- # If the program does not require any non-option arguments,
- # MinArgs should be omitted or given as 0.
- # rcFile, if given, is the name of a file to read for variable initialization.
- # Values given in it will not override values given on the command line.
- # VarNames is a comma-separated list of variable names to map to options,
- # in the same order as the options are given in OptList.
- # If UseEnv is given and nonzero, the variables will also be searched for in
- # the environment. Values given in the environment will override those given
- # in the rcfile but not those given on the command line.
- # NoRCopt, if given, is an additional letter option that if given on the
- # command line prevents the rcfile from being read.
- # Special options:
- # If x is made an option and is given, some debugging info is output.
- # h is assumed to be the help option.
-
- # Global variables:
- # The command line arguments are taken from ARGV[].
- # The arguments that are option specifiers and values are removed from
- # ARGV[], leaving only ARGV[0] and the non-option arguments.
- # The number of elements in ARGV[] should be in ARGC.
- # After processing, ARGC is set to the number of elements left in ARGV[].
- # The option values are put in Options[].
- # On error, Err is set to 1 so it can be checked for in an END block.
-
- # Return value: The number of elements left in ARGV is returned.
-
- function Opts(Name,Usage,OptList,MinArgs,rcFile,VarNames,UseEnv,NoRCopt,
- ArgsLeft) {
- if (MinArgs == "")
- MinArgs = 0
- ArgsLeft = ProcArgs(ARGC,ARGV,OptList NoRCopt,Options,1)
- # if ((ArgsLeft + ("h" in Options)) < (MinArgs+1)) {
- if (ArgsLeft < (MinArgs+1) && !("h" in Options)) {
- if (ArgsLeft != -1)
- OptErr = "Not enough arguments"
- print Name ": " OptErr ". Use -h for help."
- print Usage
- Err = 1
- exit 1
- }
- if (rcFile != "" && (NoRCopt == "" || !(NoRCopt in Options)) &&
- InitOpts(rcFile,Options,OptList,VarNames,UseEnv) == -1)
- {
- print Name ": " OptErr ". Use -h for help."
- Err = 1
- exit 1
- }
- return ArgsLeft
- }
-
- # Global vars: sets OptErr; uses ENVIRON[];
- # if anything is read from the rcFile, sets READ_RCFILE to 1
- function InitOpts(rcFile,Options,OptTypes,VarNames,UseEnv,
- Line,Var,Pos,Vars,Map,CharOpt,NumVars,TypesInd,Types,Type,Ret) {
- NumVars = split(VarNames,Vars,",")
- TypesInd = Ret = 0
- for (i = 1; i <= NumVars; i++) {
- Var = Vars[i]
- CharOpt = substr(OptTypes,++TypesInd,1)
- if (CharOpt ~ "^[:*()#<>&]$")
- CharOpt = substr(OptTypes,++TypesInd,1)
- Map[Var] = CharOpt
- Types[Var] = Type = substr(OptTypes,TypesInd+1,1)
- # Do not overwrite entries from environment
- if (UseEnv && Var in ENVIRON && AssignVal(CharOpt,ENVIRON[Var],Options,
- Type,1,Var) == -1)
- return -1
- }
- if (rcFile ~ "^~/")
- rcFile = ENVIRON["HOME"] substr(rcFile,2)
- while ((getline Line < rcFile) == 1) {
- READ_RCFILE = 1
- if (Line !~ /^#/ && Line !~ "^[ \t]*$") {
- if (Pos = index(Line,"="))
- Var = substr(Line,1,Pos-1)
- else
- Var = Line # If no value, var is entire line
- if (Var in Map) {
- if (AssignVal(Map[Var],substr(Line,Pos+1),Options,
- Types[Var],Pos != 0,Var) == -1)
- return -1
- }
- else {
- OptErr = sprintf("Unknown var \"%s\" set in %s",Var,rcFile)
- Ret = -1
- }
- }
- }
- if ("x" in Options)
- for (Var in Map)
- if (Map[Var] in Options)
- printf "%s=%s\n",Var,Options[Map[Var]]
- else
- printf "%s not set\n",Var
- return Ret
- }
-