/* $NetBSD: options.c,v 1.26 1998/05/02 18:04:09 christos Exp $ */ /*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Kenneth Almquist. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)options.c 8.2 (Berkeley) 5/4/95"; #else __RCSID("$NetBSD: options.c,v 1.26 1998/05/02 18:04:09 christos Exp $"); #endif #endif /* not lint */ #include #include #include #include "shell.h" #define DEFINE_OPTIONS #include "options.h" #undef DEFINE_OPTIONS #include "nodes.h" /* for other header files */ #include "eval.h" #include "jobs.h" #include "input.h" #include "output.h" #include "trap.h" #include "var.h" #include "memalloc.h" #include "error.h" #include "mystring.h" #ifndef SMALL #include "myhistedit.h" #endif char *arg0; /* value of $0 */ struct shparam shellparam; /* current positional parameters */ char **argptr; /* argument list for builtin commands */ char *optarg; /* set by nextopt (like getopt) */ char *optptr; /* used by nextopt */ char *minusc; /* argument to -c option */ STATIC void options __P((int)); STATIC void minus_o __P((char *, int)); STATIC void setoption __P((int, int)); STATIC int getopts __P((char *, char *, char **, char ***, char **)); /* * Process the shell command line arguments. */ void procargs(argc, argv) int argc; char **argv; { int i; argptr = argv; if (argc > 0) argptr++; for (i = 0; i < NOPTS; i++) optlist[i].val = 2; options(1); if (*argptr == NULL && minusc == NULL) sflag = 1; if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1)) iflag = 1; if (mflag == 2) mflag = iflag; for (i = 0; i < NOPTS; i++) if (optlist[i].val == 2) optlist[i].val = 0; arg0 = argv[0]; if (sflag == 0 && minusc == NULL) { commandname = arg0 = *argptr++; setinputfile(commandname, 0); } /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */ if (argptr && minusc && *argptr) arg0 = *argptr++; shellparam.p = argptr; shellparam.reset = 1; /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */ while (*argptr) { shellparam.nparam++; argptr++; } optschanged(); } void optschanged() { setinteractive(iflag); #ifndef SMALL histedit(); #endif setjobctl(mflag); } /* * Process shell options. The global variable argptr contains a pointer * to the argument list; we advance it past the options. */ STATIC void options(cmdline) int cmdline; { char *p; int val; int c; if (cmdline) minusc = NULL; while ((p = *argptr) != NULL) { argptr++; if ((c = *p++) == '-') { val = 1; if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) { if (!cmdline) { /* "-" means turn off -x and -v */ if (p[0] == '\0') xflag = vflag = 0; /* "--" means reset params */ else if (*argptr == NULL) setparam(argptr); } break; /* "-" or "--" terminates options */ } } else if (c == '+') { val = 0; } else { argptr--; break; } while ((c = *p++) != '\0') { if (c == 'c' && cmdline) { char *q; #ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */ if (*p == '\0') #endif q = *argptr++; if (q == NULL || minusc != NULL) error("Bad -c option"); minusc = q; #ifdef NOHACK break; #endif } else if (c == 'o') { minus_o(*argptr, val); if (*argptr) argptr++; } else { setoption(c, val); } } } } STATIC void minus_o(name, val) char *name; int val; { int i; if (name == NULL) { out1str("Current option settings\n"); for (i = 0; i < NOPTS; i++) out1fmt("%-16s%s\n", optlist[i].name, optlist[i].val ? "on" : "off"); } else { for (i = 0; i < NOPTS; i++) if (equal(name, optlist[i].name)) { setoption(optlist[i].letter, val); return; } error("Illegal option -o %s", name); } } STATIC void setoption(flag, val) char flag; int val; { int i; for (i = 0; i < NOPTS; i++) if (optlist[i].letter == flag) { optlist[i].val = val; if (val) { /* #%$ hack for ksh semantics */ if (flag == 'V') Eflag = 0; else if (flag == 'E') Vflag = 0; } return; } error("Illegal option -%c", flag); } #ifdef mkinit INCLUDE "options.h" SHELLPROC { int i; for (i = 0; i < NOPTS; i++) optlist[i].val = 0; optschanged(); } #endif /* * Set the shell parameters. */ void setparam(argv) char **argv; { char **newparam; char **ap; int nparam; for (nparam = 0 ; argv[nparam] ; nparam++); ap = newparam = ckmalloc((nparam + 1) * sizeof *ap); while (*argv) { *ap++ = savestr(*argv++); } *ap = NULL; freeparam(&shellparam); shellparam.malloc = 1; shellparam.nparam = nparam; shellparam.p = newparam; shellparam.optnext = NULL; } /* * Free the list of positional parameters. */ void freeparam(param) struct shparam *param; { char **ap; if (param->malloc) { for (ap = param->p ; *ap ; ap++) ckfree(*ap); ckfree(param->p); } } /* * The shift builtin command. */ int shiftcmd(argc, argv) int argc; char **argv; { int n; char **ap1, **ap2; n = 1; if (argc > 1) n = number(argv[1]); if (n > shellparam.nparam) error("can't shift that many"); INTOFF; shellparam.nparam -= n; for (ap1 = shellparam.p ; --n >= 0 ; ap1++) { if (shellparam.malloc) ckfree(*ap1); } ap2 = shellparam.p; while ((*ap2++ = *ap1++) != NULL); shellparam.optnext = NULL; INTON; return 0; } /* * The set command builtin. */ int setcmd(argc, argv) int argc; char **argv; { if (argc == 1) return showvarscmd(argc, argv); INTOFF; options(0); optschanged(); if (*argptr != NULL) { setparam(argptr); } INTON; return 0; } void getoptsreset(value) const char *value; { if (number(value) == 1) { shellparam.optnext = NULL; shellparam.reset = 1; } } /* * The getopts builtin. Shellparam.optnext points to the next argument * to be processed. Shellparam.optptr points to the next character to * be processed in the current argument. If shellparam.optnext is NULL, * then it's the first time getopts has been called. */ int getoptscmd(argc, argv) int argc; char **argv; { char **optbase; if (argc < 3) error("Usage: getopts optstring var [arg]"); else if (argc == 3) optbase = shellparam.p; else optbase = &argv[3]; if (shellparam.reset == 1) { shellparam.optnext = optbase; shellparam.optptr = NULL; shellparam.reset = 0; } return getopts(argv[1], argv[2], optbase, &shellparam.optnext, &shellparam.optptr); } STATIC int getopts(optstr, optvar, optfirst, optnext, optptr) char *optstr; char *optvar; char **optfirst; char ***optnext; char **optptr; { char *p, *q; char c = '?'; int done = 0; int ind = 0; int err = 0; char s[10]; if ((p = *optptr) == NULL || *p == '\0') { /* Current word is done, advance */ if (*optnext == NULL) return 1; p = **optnext; if (p == NULL || *p != '-' || *++p == '\0') { atend: ind = *optnext - optfirst + 1; *optnext = NULL; p = NULL; done = 1; goto out; } (*optnext)++; if (p[0] == '-' && p[1] == '\0') /* check for "--" */ goto atend; } c = *p++; for (q = optstr; *q != c; ) { if (*q == '\0') { if (optstr[0] == ':') { s[0] = c; s[1] = '\0'; err |= setvarsafe("OPTARG", s, 0); } else { outfmt(&errout, "Illegal option -%c\n", c); (void) unsetvar("OPTARG"); } c = '?'; goto bad; } if (*++q == ':') q++; } if (*++q == ':') { if (*p == '\0' && (p = **optnext) == NULL) { if (optstr[0] == ':') { s[0] = c; s[1] = '\0'; err |= setvarsafe("OPTARG", s, 0); c = ':'; } else { outfmt(&errout, "No arg for -%c option\n", c); (void) unsetvar("OPTARG"); c = '?'; } goto bad; } if (p == **optnext) (*optnext)++; setvarsafe("OPTARG", p, 0); p = NULL; } else setvarsafe("OPTARG", "", 0); ind = *optnext - optfirst + 1; goto out; bad: ind = 1; *optnext = NULL; p = NULL; out: *optptr = p; fmtstr(s, sizeof(s), "%d", ind); err |= setvarsafe("OPTIND", s, VNOFUNC); s[0] = c; s[1] = '\0'; err |= setvarsafe(optvar, s, 0); if (err) { *optnext = NULL; *optptr = NULL; flushall(); exraise(EXERROR); } return done; } /* * XXX - should get rid of. have all builtins use getopt(3). the * library getopt must have the BSD extension static variable "optreset" * otherwise it can't be used within the shell safely. * * Standard option processing (a la getopt) for builtin routines. The * only argument that is passed to nextopt is the option string; the * other arguments are unnecessary. It return the character, or '\0' on * end of input. */ int nextopt(optstring) char *optstring; { char *p, *q; char c; if ((p = optptr) == NULL || *p == '\0') { p = *argptr; if (p == NULL || *p != '-' || *++p == '\0') return '\0'; argptr++; if (p[0] == '-' && p[1] == '\0') /* check for "--" */ return '\0'; } c = *p++; for (q = optstring ; *q != c ; ) { if (*q == '\0') error("Illegal option -%c", c); if (*++q == ':') q++; } if (*++q == ':') { if (*p == '\0' && (p = *argptr++) == NULL) error("No arg for -%c option", c); optarg = p; p = NULL; } optptr = p; return c; }