1bc2fdfabf
POSIX does not permit to continuing a getopts loop with different arguments. For parsing the positional parameters, we handle this case by resetting the getopts state when the positional parameters are changed in any way (and the getopts state is local to a function). However, in the syntax getopts <optstring> <var> <arg...>, changes could lead to invalid memory access. In the syntax getopts <optstring> <var> <arg...>, store a copy of the arguments and continue to use them until getopts is reset.
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)options.h 8.2 (Berkeley) 5/4/95
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* $FreeBSD$
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*/
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struct shparam {
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int nparam; /* # of positional parameters (without $0) */
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unsigned char malloc; /* if parameter list dynamically allocated */
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unsigned char reset; /* if getopts has been reset */
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char **p; /* parameter list */
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char **optp; /* parameter list for getopts */
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char **optnext; /* next parameter to be processed by getopts */
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char *optptr; /* used by getopts */
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};
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#define eflag optlist[0].val
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#define fflag optlist[1].val
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#define Iflag optlist[2].val
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#define iflag optlist[3].val
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#define mflag optlist[4].val
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#define nflag optlist[5].val
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#define sflag optlist[6].val
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#define xflag optlist[7].val
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#define vflag optlist[8].val
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#define Vflag optlist[9].val
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#define Eflag optlist[10].val
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#define Cflag optlist[11].val
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#define aflag optlist[12].val
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#define bflag optlist[13].val
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#define uflag optlist[14].val
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#define privileged optlist[15].val
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#define Tflag optlist[16].val
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#define Pflag optlist[17].val
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#define hflag optlist[18].val
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#define NOPTS 19
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struct optent {
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const char *name;
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const char letter;
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char val;
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};
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#ifdef DEFINE_OPTIONS
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struct optent optlist[NOPTS] = {
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{ "errexit", 'e', 0 },
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{ "noglob", 'f', 0 },
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{ "ignoreeof", 'I', 0 },
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{ "interactive",'i', 0 },
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{ "monitor", 'm', 0 },
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{ "noexec", 'n', 0 },
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{ "stdin", 's', 0 },
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{ "xtrace", 'x', 0 },
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{ "verbose", 'v', 0 },
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{ "vi", 'V', 0 },
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{ "emacs", 'E', 0 },
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{ "noclobber", 'C', 0 },
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{ "allexport", 'a', 0 },
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{ "notify", 'b', 0 },
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{ "nounset", 'u', 0 },
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{ "privileged", 'p', 0 },
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{ "trapsasync", 'T', 0 },
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{ "physical", 'P', 0 },
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{ "trackall", 'h', 0 },
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};
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#else
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extern struct optent optlist[NOPTS];
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#endif
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extern char *minusc; /* argument to -c option */
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extern char *arg0; /* $0 */
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extern struct shparam shellparam; /* $@ */
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extern char **argptr; /* argument list for builtin commands */
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extern char *shoptarg; /* set by nextopt */
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extern char *nextopt_optptr; /* used by nextopt */
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void procargs(int, char **);
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void optschanged(void);
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void setparam(char **);
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void freeparam(struct shparam *);
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int nextopt(const char *);
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void getoptsreset(const char *);
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