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- #!/usr/local/bin/gawk -f
- #!/usr/bin/awk -f
- # @(#) name.gawk 2.3 97/06/11
- # 90/06/01 john h. dubois iii (john@armory.com)
- # 90/11/14 removed ksh-specific code
- # 91/06/30 removed dependency on having variable assignments given
- # on awk command line set before execution of BEGIN block
- # (doesn't work in some awks)
- # 91/12/07 added PATH setting,
- # added code to get rid of phone number in GCOS field
- # 92/05/02 converted to #!awk script
- # 96/06/18 Added all options.
- # 96/06/23 Added g option.
- # 96/09/10 2.0: Use pwent library. Added ec options.
- # 96/11/17 Let UIDs be given. Added x option.
- # 96/12/17 Added rsGanC options, config file, and home dir search.
- # 97/01/07 Added P option.
-
- BEGIN {
- Name = "name"
- Usage = "Usage: " Name " [-ahgecCprsGn] <user> ..."
- rcFile = "." Name "rc"
- ARGC = Opts(Name,Usage,"apPecCgxrsGh",1,"~/" rcFile ":$UHOME/" rcFile,
- "AUTOGCOS,ALLFIELDS,VERBOSE,EXACT,CASE,AUTOCASE",0,"n",0,"","g,s,G;p,P")
- if ("h" in Options) {
- printf \
- "%s: Print users' real names from /etc/passwd.\n"\
- "%s\n"\
- "The \"real name\" (the GCOS field from /etc/passwd) for each named user is\n"\
- "printed, in the format\n"\
- "user<tab>real-name\n"\
- "If a user name consists entirely of digits and no options (except -p) are\n"\
- "given, the name is taken to be a UID to search for.\n"\
- "If a user name contains any '/' characters and no options (except -p) are\n"\
- "given, the name is taken to be a home directory to search for.\n"\
- "Options:\n"\
- "Some of the following options can also be set by putting variables in a\n"\
- "configuration file named %s. This file is searched for first in the home\n"\
- "directory of the invoking user and then, if the environment variable UHOME\n"\
- "is set, in the directory specified by that variable. If both files exist,\n"\
- "variables assignments in the first file override those in the second file.\n"\
- "Variables are set by putting the indicated variable name in the file. To\n"\
- "turn off a flag option in the first file and prevent it from being set in\n"\
- "the second file, assign it a value of 0. e.g. if FOO is set in the first\n"\
- "file, FOO=0 in the second file will override it. Options can be turned\n"\
- "off on the command line by following them immediately with \"-\", e.g. -v-\n"\
- "to turn off the v option in such a way that it cannot be turned on in a\n"\
- "config file. Variable names appear in parentheses in the option\n"\
- "descriptions.\n"\
- "-h: Print this help.\n"\
- "-g: Search for names in the GCOS (\"real name\") field instead of the\n"\
- " account name field. The search is not case sensitive. Unlike\n"\
- " searches by account name, the name need not match the entire field.\n"\
- " The words of each name given must occur in the same order in a GCOS\n"\
- " field in order for a match to occur. Multiple password file entries\n"\
- " may be matched by one name. If multiple words of a name are given,\n"\
- " they must be quoted to form a single argument. Example:\n"\
- " %s -g 'john somebody'\n"\
- "-r: Treat the given names as unanchored regular expressions. Names are\n"\
- " compared to the same field that would be searched without -r. With\n"\
- " this option, the meaning of -e is changed to mean that the regular\n"\
- " expression should be anchored at the start and end, and the meaning\n"\
- " of -c is changed to mean that the match should be case sensitive.\n"\
- "-a: If a name is not found as a user name, search for it in the GCOS field\n"\
- " as though -g had been given. (AUTOGCOS)\n"\
- "-e: An exact match of the full GCOS field is required. (EXACT)\n"\
- "-c: Matches against the GCOS field are made case sensitive. (CASE)\n"\
- "-C: Like -c, except that a match is only case sensitive for names that\n"\
- " are given with some characters in upper case. (AUTOCASE)\n"\
- "If -e, -c, or -C is given on the command line and -r is not given, the -g\n"\
- "option is turned on. If the e, c, or C option is turn on by puttings its\n"\
- "variable in a config file, they only have an effect if -r or -g is given.\n"\
- "-s: Take the command line arguments to be the names of login shells, and\n"\
- " print users who have any of the shells.\n"\
- "-G: Take the command line arguments to be the names or numeric IDs of\n"\
- " groups, and print users who have any of them as their login group.\n"\
- "-n: Do not read the configuration file.\n"\
- "-p: Print entire password database lines for each user. (ALLFIELDS)\n"\
- "-P: Print all password database fields (except the password) for each user\n"\
- " in a more readable format, with headers. Fields may be truncated so\n"\
- " that each record fits on an 80-character line. (VERBOSE)\n",
- Name,Usage,Name,Name
- exit(0)
- }
- Debug = "x" in Options
- Verbose = "P" in Options
- WholePasswd = "p" in Options
-
- autoGCOS = "a" in Options
- CaseSensitive = "c" in Options
- Full = "e" in Options
- regex = "r" in Options
- autoCase = "C" in Options
- GCOS = ("g" in Options) || !regex && (CmdLineOpt(Options,"e") || \
- CmdLineOpt(Options,"C") || CmdLineOpt(Options,"c"))
-
- ReadPasswd() # Set PW_ values
- if ("s" in Options)
- fieldReq = PW_SHELL
- else if (GCOS)
- fieldReq = PW_GCOS
- else if ("G" in Options) {
- fieldReq = PW_GID
- getGroupMap(gMap)
- for (i = 1; i < ARGC; i++)
- if ((user = ARGV[i]) !~ /^[0-9]+$/)
- if (user in gMap)
- ARGV[i] = gMap[user]
- else {
- errCt++
- printf "%s: No group with this name: %s\n",Name,
- user > "/dev/stderr"
- delete ARGV[i]
- }
- if (errCt == ARGC-1)
- exit 1
- }
- for (argnum = 1; argnum < ARGC; argnum++) {
- if (!(argnum in ARGV))
- continue
- user = ARGV[argnum]
- if (fieldReq)
- Field = fieldReq
- else if (user ~ /^[0-9]+$/)
- Field = PW_UID
- else if (user ~ "/")
- Field = PW_HOME
- else
- Field = PW_NAME
- if (Debug)
- printf "%s: Searching for user: %s\n",Name,user > "/dev/stderr"
- if (PWSearch(\
- user,Field,Entries,autoGCOS,!CaseSensitive,autoCase,regex,Full)) {
- if (Debug)
- printf "%d entries returned by PWSearch().\n",
- NumElem(Entries) > "/dev/stderr"
- for (i = 1; i in Entries; i++)
- printEntry(Entries[i],WholePasswd,Verbose)
- }
- else
- printf "%s: No user with this %s: %s\n",Name,
- (Field == PW_NAME && autoGCOS) ? \
- pwFieldNames[PW_NAME] " or " pwFieldNames[PW_GCOS] : \
- pwFieldNames[Field],user > "/dev/stderr"
- }
- exit 0
- }
-
- # PWSearch: find entries in password file that match given criteria.
- # pat: Fixed string or pattern to compare to a password field.
- # Field: which password field to compare pat to, from the PW_* set.
- # Entries[]: The indexes of matching entries in the password database are
- # returned as values in Entries[]. The index for each value in an
- # integer giving the order in which it was found (starting with 1).
- # autoGCOS: If Field is PW_NAME and autoGCOS is true, pat is first searched
- # for in the name field; if it is not found there, it is searched for in
- # the "real name" field (part of the GCOS field).
- # ignoreCase: make matches be independent of case.
- # autoCase: If ignoreCase is false and autoCase is true, then matches are case
- # case independent only if there are no upper case letters in pat.
- # regex: pat is treated as a regular expression and compared to the "real name"
- # field.
- # Full: If regex is true, it is required to match the entire "real name" field.
- # Globals: Debug, pwFieldNames, PW_*
- # Return value: number of matching entries found (the highest index in
- # Entries[]).
- function PWSearch(pat,Field,Entries,autoGCOS,ignoreCase,autoCase,regex,Full,
- oIC,PWEnt,num) {
- split("",Entries) # empty
- if (ignoreCase && autoCase)
- ignoreCase = (pat !~ /[A-Z]/)
- num = 0
- if (Field == PW_NAME && autoGCOS)
- if (num = PWSearch(pat,Field,Entries,0,ignoreCase,0,regex,Full))
- return num
- else {
- Field = PW_GCOS
- if (Debug)
- printf "No match for '%s' in name field, trying GCOS...\n",
- pat > "/dev/stderr"
- }
- if (Debug)
- printf "Searching for %s in \"%s\" field\n",
- pat,pwFieldNames[Field] > "/dev/stderr"
- if (regex) {
- oIC = IGNORECASE
- IGNORECASE = ignoreCase
- if (Full)
- pat = "^(" pat ")$"
- setpwent()
- while (getpwent(PWEnt,0,PW_REAL) != ":")
- if (PWEnt[Field] ~ pat)
- Entries[++num] = PWEnt[PW_RECORD]
- IGNORECASE = oIC
- }
- else {
- if (!getpw(Field,pat,PWEnt,"",0,ignoreCase,Full))
- return 0
- Entries[++num] = PWEnt[PW_RECORD]
- while (getpw(Field,pat,PWEnt,"",1,ignoreCase,Full))
- Entries[++num] = PWEnt[PW_RECORD]
- }
- if (Debug)
- printf "Got %d match(es).\n",num > "/dev/stderr"
- return num
- }
-
- function trunc(s,len) {
- if (length(s) > len)
- s = substr(s,1,len-1) ">"
- return s
- }
-
- # Globals: HeaderPrinted, PW_*
- function printEntry(i,WholePasswd,Verbose,
- Format,Name,Home,Shell,PWEnt,line) {
- line = PWLines[i]
- if (WholePasswd)
- print line
- else {
- PWGetFields(line,PWEnt,PW_REAL)
- if (Verbose) {
- Format = "%-8s %5s %5s %-28s %-12s %s\n"
- if (!HeaderPrinted) {
- printf Format,"User","UID","LGID",
- "Name Office","Home dir","Login shell"
- HeaderPrinted = 1
- }
- # Let name overflow into office field
- Name = PWEnt[PW_REAL]
- if (PWEnt[PW_OFFICE] != "")
- Name = sprintf("%-15s %s",Name,PWEnt[PW_OFFICE])
- printf Format,PWEnt[PW_NAME],PWEnt[PW_UID],PWEnt[PW_GID],
- trunc(Name,28),trunc(PWEnt[PW_HOME],12),trunc(PWEnt[PW_SHELL],15)
- }
- else
- printf "%s\t%s\n",PWEnt[PW_NAME],PWEnt[PW_REAL]
- }
- }
-
- # Globals: FS, $*
- function getGroupMap(map, ret,count,ofs) {
- ofs = FS
- FS = ":"
- while ((ret = (getline < "/etc/group")) == 1) {
- map[$1] = $3
- count++
- }
- close("/etc/group")
- FS = ofs
- return ret ? -1 : count
- }
-
- ### Begin pwent library
-
- # @(#) pwent.awk 1.3 96/12/15
- # 92/08/10 john h. dubois III (john@armory.com)
- # 93/12/13 fixed to not clobber $*
- # 96/01/05 Send error messages to /dev/stderr
- # 96/05/24 Let getpwnam() return a specific field if requested.
- # Added PW_REAL and PW_OFFICE.
- # 96/06/03 Added Type field to getpwent()
- # 96/06/24 Allow a Field to be requested for getpwent() also.
- # 96/06/29 Added PW_RECORD, and getpwreal().
- # Changed PWLines to be index by record number instead of name.
- # 96/11/17 Added getpwuid()
- # 96/12/15 Added pwFieldNames, and pwent() as general select-by-field routine.
-
- # Require: ReadShells()
-
- # getpwent, getpwnam: get an entry from the passwd file.
- # Each of the following passwd functions returns an array which contains
- # a passwd file entry. The array contains the fields of the entry.
- # Global variables:
- # The following variables are defined with the values of the indexes of the
- # entries: PW_NAME, PW_PASSWORD, PW_UID, PW_GID, PW_GCOS, PW_HOME, PW_SHELL
- # PWLines[] contains the lines of the password file, indexed by record number,
- # starting with 1.
- # _pwNames[] is a mapping of name to passwd record number.
- # pwFieldNames[field-index] is set to a short description of each field.
- # getpwentNum is the number of the next entry to be returned by getpwent().
-
- # Left FS global because making it local does not work in gawk.
- function ReadPasswd( User,Line,i,Ind,ret) {
- if (PW_Name)
- return 1
- PW_NAME = 1
- PW_PASSWORD = 2
- PW_UID = 3
- PW_GID = 4
- PW_GCOS = 5
- PW_HOME = 6
- PW_SHELL = 7
- PW_REAL = -1 # for PWGetFields()
- PW_OFFICE = -2
- PW_RECORD = -3
-
- split(\
- "user name,password,UID,login GID,real name,home directory,login shell",
- pwFieldNames,",")
- getpwentNum = 1
- while ((ret = (getline Line < "/etc/passwd")) == 1) {
- PWLines[++Ind] = Line
- _pwNames[substr(Line,1,index(Line,":")-1)] = Ind
- }
- _num_pw = Ind
- close("/etc/passwd")
- if (ret) {
- printf "ReadPasswd(): Could not open /etc/passwd: %s\n",
- ERRNO > "/dev/stderr"
- return 0
- }
- return 1
- }
-
- # setpwent resets the passwd file entry pointer used by getpwent
- # to the first entry.
- function setpwent() {
- getpwentNum = 1
- }
-
- # getpwent sets PWEnt to the next entry in the passwd file.
- # If Type is set to -1, the entry for the next "real" user is returned (others
- # are skipped over), where a real user is a user whose login shell is listed in
- # /etc/shells. This requires the ReadShells() function. Other values for
- # Type are not yet defined and are ignored.
- # If the last entry has already been returned, 0 is return if Field is null,
- # ":" if not.
- # If the entry for the next real user has been requested and /etc/shells
- # cannot be read, -1 is returned if Field is null, "\n" if not.
- # See PWGetFields() for other return values and the meaning of the Field
- # parameter.
- function getpwent(PWEnt,Type,Field, entNum) {
- if (!PW_NAME)
- ReadPasswd()
- if (!(getpwentNum in PWLines))
- return Field ? ":" : 0
- if (Type == -1) {
- if (!_DidReadShells && ReadShells(LoginShells) == -1)
- return Field ? "\n" : -1
- split(PWLines[getpwentNum++],PWEnt,":")
- while (!(PWEnt[PW_SHELL] in LoginShells)) {
- if (!(getpwentNum in PWLines))
- return Field ? ":" : 0
- split(PWLines[getpwentNum++],PWEnt,":")
- }
- return PWGetFields("",PWEnt,Field,getpwentNum - 1)
- }
- else {
- entNum = getpwentNum
- return PWGetFields(PWLines[getpwentNum++],PWEnt,Field,entNum)
- }
- }
-
- # PWGetFields() splits PWLine into PWEnt[], and optionally returns a field
- # from it. If PWLine is null, PWEnt[] is assumed to have already been filled
- # in with a password entry.
- # If Field is not passed or is null, the return value is 1.
- # If Field is non-null, it should a PW_ value. In this case, the value of the
- # requested field is returned.
- # If entNum is nonzero, it is the value that PWEnt[PW_RECORD] should be set to.
- # It should be the index in PWLines[] of the record being processed.
- # In addition to the PW_ values used by the rest of the functions in this
- # library, this function can be passed PW_REAL and PW_OFFICE.
- # PW_REAL will get the part of the GCOS field before the first comma.
- # PW_OFFICE will get the part of the GCOS field after the first comma.
- # If either of these is requested, both values will also be assigned to their
- # indices in PWEnt[], unless there is no comma in the GCOS field, in which case
- # PW_OFFICE will not be set.
- # NOTE: since the global field names are set in ReadShells(), it must be
- # executed before any of the field name can be passed.
- function PWGetFields(PWLine,PWEnt,Field,entNum, gcos,ind) {
- if (PWLine != "")
- split(PWLine,PWEnt,":")
- if (entNum)
- PWEnt[PW_RECORD] = entNum
- if (!Field)
- return 1
- if (Field < 0) {
- if (ind = index(gcos = PWEnt[PW_GCOS],",")) {
- PWEnt[PW_OFFICE] = substr(gcos,ind+1)
- PWEnt[PW_REAL] = substr(gcos,1,ind-1)
- }
- else
- PWEnt[PW_REAL] = gcos
- }
- return PWEnt[Field]
- }
-
- # getpwnam sets PWEnt to the passwd entry for login name Name.
- # If Next is true or Name does not exist in the password file, the return value
- # is ":" if Field was passed, 0 if not.
- # For other return values and parameter explanation, see PWGetFields()
- function getpwnam(Name,PWEnt,Field,Next) {
- if (!PW_NAME)
- ReadPasswd()
- if (!Next && Name in _pwNames)
- return PWGetFields(PWLines[_pwNames[Name]],PWEnt,Field,_pwNames[Name])
- else
- return Field ? ":" : 0
- }
-
- # Build uid->pw-index and home->pw-index
- # Globals: _pwIndexes[]
- function MakeInd( Elem,Ind,Line,i,Fields,f) {
- Fields[PW_UID]
- Fields[PW_HOME]
- Fields[PW_GID]
- Fields[PW_SHELL]
- for (Ind = 1; Ind in PWLines; Ind++) {
- Line = PWLines[Ind]
- split(Line,Elem,":")
- for (f in Fields) {
- i = f ":" Elem[f]
- if (i in _pwIndexes)
- _pwIndexes[i] = _pwIndexes[i] "," Ind
- else
- _pwIndexes[i] = Ind
- }
- }
- IndDone = 1
- }
-
- # getpw sets PWEnt to the first passwd entry whose FieldNum'th field is equal
- # to Value. FieldNum may select any field except the password field.
- # If Next is true, Value is ignored and the next entry in the password file
- # that has the same FieldNum field as the last one requested is returned.
- # See getpwnam() for return values and the meaning of the Field param.
- # IgnoreCase and Full are used only for PW_GCOS searches; see getpwreal()
- # for their meaning.
- # Uses globals _pwMatches[] to track matches between calls.
- function getpw(FieldNum,Value,PWEnt,Field,Next,IgnoreCase,Full, elem,i,n) {
- if (FieldNum == PW_GCOS)
- return getpwreal(Value,PWEnt,Field,Next,IgnoreCase,Full)
- if (FieldNum == PW_NAME)
- return getpwnam(Value,PWEnt,Field,Next)
- if (Next) {
- if ((FieldNum,_pwMatches[FieldNum,"cur"]) in _pwMatches) {
- i = _pwMatches[FieldNum,_pwMatches[FieldNum,"cur"]++]
- return PWGetFields(PWLines[i],PWEnt,Field,i)
- }
- }
- else {
- if (!IndDone)
- MakeInd()
- Value = FieldNum ":" Value
- if (Value in _pwIndexes) {
- n = split(_pwIndexes[Value],elem,",")
- for (i = 1; i <= n; i++)
- _pwMatches[FieldNum,i] = elem[i]
- delete _pwMatches[FieldNum,n+1] # so we know when to end
- _pwMatches[FieldNum,"cur"] = 2
- return PWGetFields(PWLines[elem[1]],PWEnt,Field,elem[1])
- }
- }
- return Field ? ":" : 0
- }
-
- function getpwhome(home,PWEnt,Field,Next) {
- if (!PW_NAME) # set PW_ values
- ReadPasswd()
- return getpw(PW_HOME,home,PWEnt,Field,Next)
- }
-
- function getpwuid(UID,PWEnt,Field,Next) {
- if (!PW_NAME) # set PW_ values
- ReadPasswd()
- return getpw(PW_UID,(UID+0),PWEnt,Field,Next)
- }
-
- # Make an index by real name. For each passwd file entry, the real-name
- # is lowercased and split into components on non-alphanums. The passwd entry
- # index that the name came from is added to the value of each such component
- # in the global _RealInd[]. The indexes stored this way are separated by
- # commas. If the real-name contains no alphanums, its index is stored under
- # the null index.
- function _makeRealInd( PWEnt,ret,Elem,nelem,i,Component) {
- setpwent()
- while ((ret = getpwent(PWEnt,"",PW_REAL)) != ":") {
- nelem = split(tolower(ret),Elem,/[^a-z0-9]+/)
- for (i = 1; i <= nelem; i++) {
- Component = Elem[i]
- if (Component == "" && nelem > 1)
- continue
- if (Component in _RealInd)
- _RealInd[Component] = _RealInd[Component] "," PWEnt[PW_RECORD]
- else
- _RealInd[Component] = PWEnt[PW_RECORD]
- }
- }
- _realIndDone = 1
- }
-
- # Make Name into a pattern that will match a name that contains all of the
- # same name components (sequences of alphanums) in the same order. If Name
- # contains no name components, a null string is returned.
- function MakeNamePat(Name, Elem,nelem,i,Pat,e) {
- nelem = split(Name,Elem,/[^a-zA-Z0-9]+/)
- for (i = 1; i <= nelem; i++) {
- if ((e = Elem[i]) == "")
- continue
- if (Pat == "")
- Pat = "(^|[^a-zA-Z0-9])" e
- else
- Pat = Pat "[^a-zA-Z0-9](.*[^a-zA-Z0-9])?" e
- }
- if (Pat == "") # If Name contained no alphanums...
- return ""
- Pat = Pat "([^a-zA-Z0-9]|$)"
- return Pat
- }
-
- # getpwgreal sets PWEnt to the first passwd entry whose PW_REAL (see
- # PWGetFields()) field matches Real. Matching occurs if the alphanumeric
- # components of Real occur in the same order in the entry. Non-alphanums are
- # ignored. All of the components in Real must occur in the entry, but not all
- # of the components in the entry must occur in Real.
- # If the given name does not exist in the password file,
- # the return value is ":" if Field was passed, 0 if not.
- # If Next is true, getpwreal() sets PWEnt to the next passwd entry whose
- # PW_REAL field matches the last previous Real parameter passed.
- # In this case, if the last entry has already been returned,
- # the return value is ":" if Field was passed, 0 if not.
- # Different IgnoreCase and Full parameters may be given when doing a Next
- # search. Both must always be passed; they do not default to the original
- # values when doing a Next search. The only parameter ignored when doing a
- # Next search is Real.
- # If IgnoreCase is true, case is ignored when searching.
- # If Full is true, a match of the full name is required (including any
- # punctuation).
- # For successful return values and Field parameter explanation,
- # see PWGetFields()
- # Globals: For the Next search, between invokations these varies store values:
- # _getpwrealInd[]: The set of pw indices that matched the query.
- # _getpwrealIndInd: The next index in _getpwrealInd[] to look at.
- # _getpwrealReal: The Real value passed with the original query.
- # _getpwrealPat: Real converted to a component order search pattern.
- function getpwreal(Real,PWEnt,Field,Next,IgnoreCase,Full, ind,name,Pat) {
- if (!Next) {
- if (!PW_NAME)
- ReadPasswd()
- if (!_realIndDone)
- _makeRealInd()
- _getpwrealReal = Real
- _getpwrealPat = MakeNamePat(Real)
- # Get first component from Real
- Real = tolower(Real)
- gsub("^[^a-z0-9]+","",Real)
- gsub("[^a-z0-9].*","",Real)
- if (!(Real in _RealInd))
- return Field ? ":" : 0
- split(_RealInd[Real],_getpwrealInd,",")
- _getpwrealIndInd = 1
- }
- if (Full)
- Pat = _getpwrealReal
- else
- Pat = _getpwrealPat
- if (IgnoreCase)
- Pat = tolower(Pat)
- while (_getpwrealIndInd in _getpwrealInd) {
- ind = _getpwrealInd[_getpwrealIndInd++]
- name = PWGetFields(PWLines[ind],PWEnt,PW_REAL,ind)
- if (IgnoreCase)
- name = tolower(name)
- if (Full ? (name == Pat) : (name ~ Pat))
- return PWGetFields("",PWEnt,Field,ind)
- }
- return Field ? ":" : 0
- }
-
- ### End pwent library
- ### Start of ProcArgs library
- # @(#) ProcArgs 1.11 96/12/08
- # 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(): Do not require any args if h option is given.
- # 94/09/23 Fixed bug that caused fail if -opt<value> given as last arg.
- # 95/01/22 Record options given more than once. Record option num in argv.
- # 95/06/08 Added ExclusiveOptions().
- # 96/01/20 Let rcfiles be a colon-separated list of filenames.
- # Expand $VARNAME at the start of its filenames.
- # Let varname=0 and -option- turn off an option.
- # 96/05/05 Changed meaning of 7th arg to Opts; now can specify exactly how many
- # of the vars should be searched for in the environment.
- # Check for duplicate rcfiles.
- # 96/05/13 Return more specific error values. Note: ProcArgs() and InitOpts()
- # now return various negatives values on error, not just -1, and
- # Opts() may set Err to various positive values, not just 1.
- # Added AllowUnrecOpt.
- # 96/05/23 Check type given for & option
- # 96/06/15 Re-port to awk
- # 96/10/01 Moved file-reading code into ReadConfFile(), so that it can be
- # used by other functions.
- # 96/10/15 Added OptChars
- # 96/11/01 Added exOpts arg to Opts()
- # 96/11/16 Added ; type
- # 96/12/08 Added Opt2Set() & Opt2Sets()
-
- # 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
- # ; Non-empty 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 ":"
- # or ";".
- # 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. See the OptChars
- # parameter to explicitly set the option-specifier characters.
-
- # 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 the
- # number of times it occurs in argv[].
-
- # 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, and Options[option-name,"count"] is (initially) set to the 1.
- # If an option that takes an argument is given more than once,
- # Options[option-name,"count"] is incremented, and the value is assigned to
- # the index (option-name,instance) where instance is 2 for the second occurance
- # of the option, etc.
- # In other words, the first time an option with a value is encountered, the
- # value is assigned to an index consisting only of its name; for any further
- # occurances of the option, the value index has an extra (count) dimension.
-
- # The sequence number for each option found in argv[] is stored in
- # Options[option-name,"num",instance], where instance is 1 for the first
- # occurance of the option, etc. The sequence number starts at 1 and is
- # incremented for each option, both those that have a value and those that
- # do not. Options set from a config file have a value of 0 assigned to this.
-
- # 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.
- # Option processing will stop with the first unrecognized option, just as
- # though -- was given except that unlike -- the unrecognized option will not be
- # removed from ARGV[]. Normally, an error value is returned in this case.
- # If AllowUnrecOpt is true, it is not an error for an unrecognized option to
- # be found, so the number of remaining arguments is returned instead.
- # If OptChars is not a null string, it is the set of characters that indicate
- # that an argument is an option string if the string begins with one of the
- # characters. A string consisting solely of two of the same option-indicator
- # characters stops the scanning of argv[]. The default is "-+".
- # 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 a negative value is returned.
- # Current error values:
- # -1: option that required an argument did not get it.
- # -2: argument of incorrect type supplied for an option.
- # -3: unrecognized (invalid) option.
- function ProcArgs(argc,argv,OptList,Options,compress,AllowUnrecOpt,OptChars,
- ArgNum,ArgsLeft,Arg,ArgLen,ArgInd,Option,Pos,NumOpt,Value,HadValue,specGiven,
- NeedNextOpt,GotValue,OptionNum,Escape,dest,src,count,c,OptTerm,OptCharSet)
- {
- # 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,"&")
- OptionNum = 0
- if (OptChars == "")
- OptChars = "-+"
- while (OptChars != "") {
- c = substr(OptChars,1,1)
- OptChars = substr(OptChars,2)
- OptCharSet[c]
- OptTerm[c c]
- }
- for (ArgNum = 1; ArgNum < argc; ArgNum++) {
- Arg = argv[ArgNum]
- if (length(Arg) < 2 || !((specGiven = substr(Arg,1,1)) in OptCharSet))
- break # Not an option; quit
- if (Arg in OptTerm) {
- delete argv[ArgNum]
- ArgsLeft--
- break
- }
- ArgLen = length(Arg)
- for (ArgInd = 2; ArgInd <= ArgLen; ArgInd++) {
- Option = substr(Arg,ArgInd,1)
- if (NumOpt && Option ~ /[-+.0-9]/) {
- # If this option is a numeric option, make its flag be & and
- # its option string flag position be the position of & in
- # the option string.
- Option = "&"
- Pos = NumOpt
- # Prefix Arg with a char so that ArgInd will point to the
- # first char of the numeric option.
- Arg = "&" Arg
- ArgLen++
- }
- # Find position of flag in option string, to get its type (if any).
- # Disallow & as literal flag.
- else if (!(Pos = index(OptList,Option)) || Option == "&") {
- if (AllowUnrecOpt) {
- Escape = 1
- break
- }
- else {
- OptErr = "Invalid option: " specGiven Option
- return -3
- }
- }
-
- # Find what the value of the option will be if it takes one.
- # NeedNextOpt is true if the option specifier is the last char of
- # this arg, which means that if the option requires a value it is
- # the next arg.
- if (NeedNextOpt = (ArgInd >= ArgLen)) { # Value is the next arg
- if (GotValue = ArgNum + 1 < argc)
- Value = argv[ArgNum+1]
- }
- else { # Value is included with option
- Value = substr(Arg,ArgInd + 1)
- GotValue = 1
- }
-
- if (HadValue = AssignVal(Option,Value,Options,
- substr(OptList,Pos + 1,1),GotValue,"",++OptionNum,!NeedNextOpt,
- specGiven)) {
- if (HadValue < 0) # error occured
- return HadValue
- if (HadValue == 2)
- ArgInd++ # Account for the single-char value we used.
- else {
- if (NeedNextOpt) { # option took next arg as value
- delete argv[++ArgNum]
- ArgsLeft--
- }
- break # This option has been used up
- }
- }
- }
- if (Escape)
- break
- # Do not delete arg until after processing of it, so that if it is not
- # recognized it can be left in ARGV[].
- delete argv[ArgNum]
- ArgsLeft--
- }
- if (compress != 0) {
- dest = 1
- src = argc - ArgsLeft + 1
- for (count = ArgsLeft - 1; count; count--) {
- ARGV[dest] = ARGV[src]
- dest++
- src++
- }
- }
- return ArgsLeft
- }
-
- # Assignment to values in Options[] occurs only in this function.
- # Option: Option specifier character.
- # Value: Value to be assigned to option, if it takes a value.
- # Options[]: Options array to return values in.
- # ArgType: Argument type specifier character.
- # GotValue: Whether any value is available to be assigned to this option.
- # Name: Name of option being processed.
- # OptionNum: Number of this option (starting with 1) if set in argv[],
- # or 0 if it was given in a config file or in the environment.
- # SingleOpt: true if the value (if any) that is available for this option was
- # given as part of the same command line arg as the option. Used only for
- # options from the command line.
- # specGiven is the option specifier character use, if any (e.g. - or +),
- # for use in error messages.
- # Global variables: OptErr
- # Return value: negative value on error, 0 if option did not require an
- # argument, 1 if it did & used the whole arg, 2 if it required just one char of
- # the arg.
- # Current error values:
- # -1: Option that required an argument did not get it.
- # -2: Value of incorrect type supplied for option.
- # -3: Bad type given for option &
- function AssignVal(Option,Value,Options,ArgType,GotValue,Name,OptionNum,
- SingleOpt,specGiven, UsedValue,Err,NumTypes) {
- # If option takes a value... [
- NumTypes = "*()#<>]"
- if (Option == "&" && ArgType !~ "[" NumTypes) { # ]
- OptErr = "Bad type given for & option"
- return -3
- }
-
- if (UsedValue = (ArgType ~ "[:;" NumTypes)) { # ]
- 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,specGiven)) != "") {
- OptErr = Err
- return -2
- }
- # Mark this as a numeric variable; will be propogated to Options[] val.
- if (ArgType != ":" && ArgType != ";")
- Value += 0
- if ((Instance = ++Options[Option,"count"]) > 1)
- Options[Option,Instance] = Value
- else
- Options[Option] = Value
- }
- # If this is an environ or rcfile assignment & it was given a value...
- else if (!OptionNum && Value != "") {
- UsedValue = 1
- # If the value is "0" or "-" and this is the first instance of it,
- # do not set Options[Option]; this allows an assignment in an rcfile to
- # turn off an option (for the simple "Option in Options" test) in such
- # a way that it cannot be turned on in a later file.
- if (!(Option in Options) && (Value == "0" || Value == "-"))
- Instance = 1
- else
- Instance = ++Options[Option]
- # Save the value even though this is a flag
- Options[Option,Instance] = Value
- }
- # If this is a command line flag and has a - following it in the same arg,
- # it is being turned off.
- else if (OptionNum && SingleOpt && substr(Value,1,1) == "-") {
- UsedValue = 2
- if (Option in Options)
- Instance = ++Options[Option]
- else
- Instance = 1
- Options[Option,Instance]
- }
- # If this is a flag assignment without a value, increment the count for the
- # flag unless it was turned off. The indicator for a flag being turned off
- # is that the flag index has not been set in Options[] but it has an
- # instance count.
- else if (Option in Options || !((Option,1) in Options))
- # Increment number of times this flag seen; will inc null value to 1
- Instance = ++Options[Option]
- Options[Option,"num",Instance] = OptionNum
- 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
- # ; Non-null string argument
- # * Floating point argument
- # ( Non-negative floating point argument
- # ) Positive floating point argument
- # # Integer argument
- # < Non-negative integer argument
- # > Positive integer argument
- # specGiven is the option specifier character use, if any (e.g. - or +),
- # for use in error messages.
- # Returns null on success, err string on error
- function CheckType(ArgType,Value,Option,Name,specGiven, Err,ErrStr) {
- if (ArgType == ":")
- return ""
- if (ArgType == ";") {
- if (Value == "")
- Err = "must be a non-empty string"
- }
- # A number begins with optional + or -, and is followed by a string of
- # digits or a decimal with digits before it, after it, or both
- else 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 != "") {
- ErrStr = "Bad value \"" Value "\". Value assigned to "
- if (Name != "")
- return ErrStr "variable " substr(Name,1,1) " " Err
- else {
- if (Option == "&")
- Option = Value
- return ErrStr "option " specGiven substr(Option,1,1) " " Err
- }
- }
- else
- return ""
- }
-
- # 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.
- # rcFiles, if given, is a colon-seprated list of filenames to read for
- # variable initialization. If a filename begins with ~/, the ~ is replaced
- # by the value of the environment variable HOME. If a filename begins with
- # $, the part from the character after the $ up until (but not including)
- # the first character not in [a-zA-Z0-9_] will be searched for in the
- # environment; if found its value will be substituted, if not the filename will
- # be discarded.
- # rcfiles are read in the order given.
- # Values given in them will not override values given on the command line,
- # and values given in later files will not override those set in earlier
- # files, because AssignVal() will store each with a different instance index.
- # The first instance of each variable, either on the command line or in an
- # rcfile, will be stored with no instance index, and this is the value
- # normally used by programs that call this function.
- # 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 EnvSearch is given and nonzero, the first EnvSearch variables will also be
- # searched for in the environment. If set to -1, all values will be searched
- # for in the environment. Values given in the environment will override
- # those given in the rcfiles 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 rcfiles from being read.
- # See ProcArgs() for a description of AllowUnRecOpt and optChars, and
- # ExclusiveOptions() for a description of exOpts.
- # 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 a positive integer value so it can be checked for in
- # an END block.
- # Return value: The number of elements left in ARGV is returned.
- # Must keep OptErr global since it may be set by InitOpts().
- function Opts(Name,Usage,OptList,MinArgs,rcFiles,VarNames,EnvSearch,NoRCopt,
- AllowUnrecOpt,optChars,exOpts, ArgsLeft,e) {
- if (MinArgs == "")
- MinArgs = 0
- ArgsLeft = ProcArgs(ARGC,ARGV,OptList NoRCopt,Options,1,AllowUnrecOpt,
- optChars)
- if (ArgsLeft < (MinArgs+1) && !("h" in Options)) {
- if (ArgsLeft >= 0) {
- OptErr = "Not enough arguments"
- Err = 4
- }
- else
- Err = -ArgsLeft
- printf "%s: %s.\nUse -h for help.\n%s\n",
- Name,OptErr,Usage > "/dev/stderr"
- exit 1
- }
- if (rcFiles != "" && (NoRCopt == "" || !(NoRCopt in Options)) &&
- (e = InitOpts(rcFiles,Options,OptList,VarNames,EnvSearch)) < 0)
- {
- print Name ": " OptErr ".\nUse -h for help." > "/dev/stderr"
- Err = -e
- exit 1
- }
- if ((exOpts != "") && ((OptErr = ExclusiveOptions(exOpts,Options)) != ""))
- {
- printf "%s: Error: %s\n",Name,OptErr > "/dev/stderr"
- Err = 1
- exit 1
- }
- return ArgsLeft
- }
-
- # ReadConfFile(): Read a file containing var/value assignments, in the form
- # <variable-name><assignment-char><value>.
- # Whitespace (spaces and tabs) around a variable (leading whitespace on the
- # line and whitespace between the variable name and the assignment character)
- # is stripped. Lines that do not contain an assignment operator or which
- # contain a null variable name are ignored, other than possibly being noted in
- # the return value. If more than one assignment is made to a variable, the
- # first assignment is used.
- # Input variables:
- # File is the file to read.
- # Comment is the line-comment character. If it is found as the first non-
- # whitespace character on a line, the line is ignored.
- # Assign is the assignment string. The first instance of Assign on a line
- # separates the variable name from its value.
- # If StripWhite is true, whitespace around the value (whitespace between the
- # assignment char and trailing whitespace on the line) is stripped.
- # VarPat is a pattern that variable names must match.
- # Example: "^[a-zA-Z][a-zA-Z0-9]+$"
- # If FlagsOK is true, variables are allowed to be "set" by being put alone on
- # a line; no assignment operator is needed. These variables are set in
- # the output array with a null value. Lines containing nothing but
- # whitespace are still ignored.
- # Output variables:
- # Values[] contains the assignments, with the indexes being the variable names
- # and the values being the assigned values.
- # Lines[] contains the line number that each variable occured on. A flag set
- # is record by giving it an index in Lines[] but not in Values[].
- # Return value:
- # If any errors occur, a string consisting of descriptions of the errors
- # separated by newlines is returned. In no case will the string start with a
- # numeric value. If no errors occur, the number of lines read is returned.
- function ReadConfigFile(Values,Lines,File,Comment,Assign,StripWhite,VarPat,
- FlagsOK,
- Line,Status,Errs,AssignLen,LineNum,Var,Val) {
- if (Comment != "")
- Comment = "^" Comment
- AssignLen = length(Assign)
- if (VarPat == "")
- VarPat = "." # null varname not allowed
- while ((Status = (getline Line < File)) == 1) {
- LineNum++
- sub("^[ \t]+","",Line)
- if (Line == "") # blank line
- continue
- if (Comment != "" && Line ~ Comment)
- continue
- if (Pos = index(Line,Assign)) {
- Var = substr(Line,1,Pos-1)
- Val = substr(Line,Pos+AssignLen)
- if (StripWhite) {
- sub("^[ \t]+","",Val)
- sub("[ \t]+$","",Val)
- }
- }
- else {
- Var = Line # If no value, var is entire line
- Val = ""
- }
- if (!FlagsOK && Val == "") {
- Errs = Errs \
- sprintf("\nBad assignment on line %d of file %s: %s",
- LineNum,File,Line)
- continue
- }
- sub("[ \t]+$","",Var)
- if (Var !~ VarPat) {
- Errs = Errs sprintf("\nBad variable name on line %d of file %s: %s",
- LineNum,File,Var)
- continue
- }
- if (!(Var in Lines)) {
- Lines[Var] = LineNum
- if (Pos)
- Values[Var] = Val
- }
- }
- if (Status)
- Errs = Errs "\nCould not read file " File
- close(File)
- return Errs == "" ? LineNum : substr(Errs,2) # Skip first newline
- }
-
- # Variables:
- # Data is stored in Options[].
- # rcFiles, OptList, VarNames, and EnvSearch are as as described for Opts().
- # Global vars:
- # Sets OptErr. Uses ENVIRON[].
- # If anything is read from any of the rcfiles, sets READ_RCFILE to 1.
- function InitOpts(rcFiles,Options,OptList,VarNames,EnvSearch,
- Line,Var,Pos,Vars,Map,CharOpt,NumVars,TypesInd,Types,Type,Ret,i,rcFile,
- fNames,numrcFiles,filesRead,Err,Values,retStr) {
- split("",filesRead,"") # make awk know this is an array
- NumVars = split(VarNames,Vars,",")
- TypesInd = Ret = 0
- if (EnvSearch == -1)
- EnvSearch = NumVars
- for (i = 1; i <= NumVars; i++) {
- Var = Vars[i]
- CharOpt = substr(OptList,++TypesInd,1)
- if (CharOpt ~ "^[:;*()#<>&]$")
- CharOpt = substr(OptList,++TypesInd,1)
- Map[Var] = CharOpt
- Types[Var] = Type = substr(OptList,TypesInd+1,1)
- # Do not overwrite entries from environment
- if (i <= EnvSearch && Var in ENVIRON &&
- (Err = AssignVal(CharOpt,ENVIRON[Var],Options,Type,1,Var,0)) < 0)
- return Err
- }
-
- numrcFiles = split(rcFiles,fNames,":")
- for (i = 1; i <= numrcFiles; i++) {
- rcFile = fNames[i]
- if (rcFile ~ "^~/")
- rcFile = ENVIRON["HOME"] substr(rcFile,2)
- else if (rcFile ~ /^\$/) {
- rcFile = substr(rcFile,2)
- match(rcFile,"^[a-zA-Z0-9_]*")
- envvar = substr(rcFile,1,RLENGTH)
- if (envvar in ENVIRON)
- rcFile = ENVIRON[envvar] substr(rcFile,RLENGTH+1)
- else
- continue
- }
- if (rcFile in filesRead)
- continue
- # rcfiles are liable to be given more than once, e.g. UHOME and HOME
- # may be the same
- filesRead[rcFile]
- if ("x" in Options)
- printf "Reading configuration file %s\n",rcFile > "/dev/stderr"
- retStr = ReadConfigFile(Values,Lines,rcFile,"#","=",0,"",1)
- if (retStr > 0)
- READ_RCFILE = 1
- else if (ret != "") {
- OptErr = retStr
- Ret = -1
- }
- for (Var in Lines)
- if (Var in Map) {
- if ((Err = AssignVal(Map[Var],
- Var in Values ? Values[Var] : "",Options,Types[Var],
- Var in Values,Var,0)) < 0)
- return Err
- }
- else {
- OptErr = sprintf(\
- "Unknown var \"%s\" assigned to on line %d\nof file %s",Var,
- Lines[Var],rcFile)
- Ret = -1
- }
- }
-
- if ("x" in Options)
- for (Var in Map)
- if (Map[Var] in Options)
- printf "(%s) %s=%s\n",Map[Var],Var,Options[Map[Var]] > \
- "/dev/stderr"
- else
- printf "(%s) %s not set\n",Map[Var],Var > "/dev/stderr"
- return Ret
- }
-
- # OptSets is a semicolon-separated list of sets of option sets.
- # Within a list of option sets, the option sets are separated by commas. For
- # each set of sets, if any option in one of the sets is in Options[] AND any
- # option in one of the other sets is in Options[], an error string is returned.
- # If no conflicts are found, nothing is returned.
- # Example: if OptSets = "ab,def,g;i,j", an error will be returned due to
- # the exclusions presented by the first set of sets (ab,def,g) if:
- # (a or b is in Options[]) AND (d, e, or f is in Options[]) OR
- # (a or b is in Options[]) AND (g is in Options) OR
- # (d, e, or f is in Options[]) AND (g is in Options)
- # An error will be returned due to the exclusions presented by the second set
- # of sets (i,j) if: (i is in Options[]) AND (j is in Options[]).
- # todo: make options given on command line unset options given in config file
- # todo: that they conflict with.
- function ExclusiveOptions(OptSets,Options,
- Sets,SetSet,NumSets,Pos1,Pos2,Len,s1,s2,c1,c2,ErrStr,L1,L2,SetSets,NumSetSets,
- SetNum,OSetNum) {
- NumSetSets = split(OptSets,SetSets,";")
- # For each set of sets...
- for (SetSet = 1; SetSet <= NumSetSets; SetSet++) {
- # NumSets is the number of sets in this set of sets.
- NumSets = split(SetSets[SetSet],Sets,",")
- # For each set in a set of sets except the last...
- for (SetNum = 1; SetNum < NumSets; SetNum++) {
- s1 = Sets[SetNum]
- L1 = length(s1)
- for (Pos1 = 1; Pos1 <= L1; Pos1++)
- # If any of the options in this set was given, check whether
- # any of the options in the other sets was given. Only check
- # later sets since earlier sets will have already been checked
- # against this set.
- if ((c1 = substr(s1,Pos1,1)) in Options)
- for (OSetNum = SetNum+1; OSetNum <= NumSets; OSetNum++) {
- s2 = Sets[OSetNum]
- L2 = length(s2)
- for (Pos2 = 1; Pos2 <= L2; Pos2++)
- if ((c2 = substr(s2,Pos2,1)) in Options)
- ErrStr = ErrStr "\n"\
- sprintf("Cannot give both %s and %s options.",
- c1,c2)
- }
- }
- }
- if (ErrStr != "")
- return substr(ErrStr,2)
- return ""
- }
-
- # The value of each instance of option Opt that occurs in Options[] is made an
- # index of Set[].
- # The return value is the number of instances of Opt in Options.
- function Opt2Set(Options,Opt,Set, count) {
- if (!(Opt in Options))
- return 0
- Set[Options[Opt]]
- count = Options[Opt,"count"]
- for (; count > 1; count--)
- Set[Options[Opt,count]]
- return count
- }
-
- # The value of each instance of option Opt that occurs in Options[] that
- # begins with "!" is made an index of nSet[] (with the ! stripped from it).
- # Other values are made indexes of Set[].
- # The return value is the number of instances of Opt in Options.
- function Opt2Sets(Options,Opt,Set,nSet, count,aSet,ret) {
- ret = Opt2Set(Options,Opt,aSet)
- for (value in aSet)
- if (substr(value,1,1) == "!")
- nSet[substr(value,2)]
- else
- Set[value]
- return ret
- }
-
- # Returns true if option Opt was given on the command line.
- function CmdLineOpt(Options,Opt, i) {
- for (i = 1; (Opt,"num",i) in Options; i++)
- if (Options[Opt,"num",i] != 0)
- return 1
- return 0
- }
- ### End of ProcArgs library
- ### Begin set library
- # 96/05/23 added return values jhdiii
- # 96/05/25 added set2list()
- # 97/01/26 Added AOnly(), Exclusive()
-
- # Return value: the number of new elements added to Inter
- function Intersection(A,B,Inter, Elem,Count) {
- for (Elem in A)
- if (Elem in B && !(Elem in Inter)) {
- Inter[Elem]
- Count++
- }
- return Count
- }
-
- # Any element that is in A or B but not both and which is not already in
- # Excl is added to Excl.
- # Return value: the number of new elements added to Excl
- function Exclusive(A,B,Excl) {
- return AOnly(A,B,Excl) + AOnly(B,A,Excl)
- }
-
- # Any element that is in A and not in B or aOnly is added to aOnly.
- # Return value: the number of new elements added to aOnly.
- function AOnly(A,B,aOnly, Elem,Count) {
- for (Elem in A)
- if (!(Elem in B) && !(Elem in aOnly)) {
- aOnly[Elem]
- Count++
- }
- return Count
- }
-
- # Return value: the number of new elements added to Both
- function Union(A,B,Both) {
- return CopySet(A,Both) + CopySet(B,Both)
- }
-
- # Deletes any elements that are in both Minuend and Subtrahend from Minuend.
- # Return value: the number of elements deleted.
- function SubtractSet(Minuend,Subtrahend, Elem,nDel) {
- for (Elem in Subtrahend)
- if (Elem in Minuend) {
- delete Minuend[Elem]
- nDel++
- }
- return nDel
- }
-
- # Return value: the number of new elements added to To
- function CopySet(From,To, Elem,n) {
- for (Elem in From)
- if (!(Elem in To)) {
- To[Elem]
- n++
- }
- return n
- }
-
- # Returns 1 if Set is empty, 0 if not.
- function IsEmpty(Set, i) {
- for (i in Set)
- return 0
- return 1
- }
-
- # MakeSet: make a set from a list.
- # An index with the name of each element of the list is created in the given
- # array.
- # Input variables:
- # Elements is a string containing the list of elements.
- # Sep is the character that separates the elements of the list.
- # Output variables:
- # Set is the array.
- # Return value: the number of new elements added to the set.
- function MakeSet(Set,Elements,Sep, i,Num,Names,nFound,ind) {
- nFound = 0
- Num = split(Elements,Names,Sep)
- for (i = 1; i <= Num; i++) {
- ind = Names[i]
- if (!(ind in Set)) {
- Set[ind]
- nFound++
- }
- }
- return nFound
- }
-
- # Returns the number of elements in set Set
- function NumElem(Set, elem,Num) {
- for (elem in Set)
- Num++
- return Num
- }
-
- # Remove all elements from Set
- function DeleteAll(Set, i) {
- split("",Set,",")
- }
-
- # Returns a list of all of the elements in Set[], with each pair of elements
- # separated by Sep.
- function set2list(Set,Sep, list,elem) {
- for (elem in Set)
- list = list Sep elem
- return substr(list,2) # skip 1st separator
- }
- ### End set library
-