/* $OpenBSD: var.c,v 1.44 2015/09/10 11:37:42 jca Exp $ */ /*- * Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, * 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, * 2019 * mirabilos * * Provided that these terms and disclaimer and all copyright notices * are retained or reproduced in an accompanying document, permission * is granted to deal in this work without restriction, including un- * limited rights to use, publicly perform, distribute, sell, modify, * merge, give away, or sublicence. * * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to * the utmost extent permitted by applicable law, neither express nor * implied; without malicious intent or gross negligence. In no event * may a licensor, author or contributor be held liable for indirect, * direct, other damage, loss, or other issues arising in any way out * of dealing in the work, even if advised of the possibility of such * damage or existence of a defect, except proven that it results out * of said person's immediate fault when using the work as intended. */ #include "sh.h" #include "mirhash.h" #if defined(__OpenBSD__) #include #endif __RCSID("$MirOS: src/bin/mksh/var.c,v 1.236 2020/04/13 16:29:34 tg Exp $"); /*- * Variables * * WARNING: unreadable code, needs a rewrite * * if (flag&INTEGER), val.i contains integer value, and type contains base. * otherwise, (val.s + type) contains string value. * if (flag&EXPORT), val.s contains "name=value" for E-Z exporting. */ static struct table specials; static uint32_t lcg_state = 5381, qh_state = 4711; /* may only be set by typeset() just before call to array_index_calc() */ static enum namerefflag innermost_refflag = SRF_NOP; static void c_typeset_vardump(struct tbl *, uint32_t, int, int, bool, bool); static void c_typeset_vardump_recursive(struct block *, uint32_t, int, bool, bool); static char *formatstr(struct tbl *, const char *); static void exportprep(struct tbl *, const char *, size_t); static int special(const char *); static void unspecial(const char *); static void getspec(struct tbl *); static void setspec(struct tbl *); static void unsetspec(struct tbl *, bool); static int getint(struct tbl *, mksh_ari_u *, bool); static const char *array_index_calc(const char *, bool *, uint32_t *); static struct tbl *vtypeset(int *, const char *, uint32_t, uint32_t, int, int); /* * create a new block for function calls and simple commands * assume caller has allocated and set up e->loc */ void newblock(void) { struct block *l; static const char *empty[] = { null }; l = alloc(sizeof(struct block), ATEMP); l->flags = 0; /* TODO: could use e->area (l->area => l->areap) */ ainit(&l->area); if (!e->loc) { l->argc = 0; l->argv = empty; } else { l->argc = e->loc->argc; l->argv = e->loc->argv; } l->exit = l->error = NULL; ktinit(&l->area, &l->vars, 0); ktinit(&l->area, &l->funs, 0); l->next = e->loc; e->loc = l; } /* * pop a block handling special variables */ void popblock(void) { ssize_t i; struct block *l = e->loc; struct tbl *vp, **vpp = l->vars.tbls, *vq; /* pop block */ e->loc = l->next; i = 1 << (l->vars.tshift); while (--i >= 0) if ((vp = *vpp++) != NULL && (vp->flag&SPECIAL)) { if ((vq = global(vp->name))->flag & ISSET) setspec(vq); else unsetspec(vq, false); } if (l->flags & BF_DOGETOPTS) user_opt = l->getopts_state; afreeall(&l->area); afree(l, ATEMP); } /* called by main() to initialise variable data structures */ #define VARSPEC_DEFNS #include "var_spec.h" enum var_specs { #define VARSPEC_ENUMS #include "var_spec.h" V_MAX }; /* this is biased with -1 relative to VARSPEC_ENUMS */ static const char * const initvar_names[] = { #define VARSPEC_ITEMS #include "var_spec.h" }; void initvar(void) { int i = 0; struct tbl *tp; ktinit(APERM, &specials, /* currently 21 specials: 75% of 32 = 2^5 */ 5); while (i < V_MAX - 1) { tp = ktenter(&specials, initvar_names[i], hash(initvar_names[i])); tp->flag = DEFINED|ISSET; tp->type = ++i; } } /* common code for several functions below and c_typeset() */ struct block * varsearch(struct block *l, struct tbl **vpp, const char *vn, uint32_t h) { register struct tbl *vp; if (l) { varsearch_loop: if ((vp = ktsearch(&l->vars, vn, h)) != NULL) goto varsearch_out; if (l->next != NULL) { l = l->next; goto varsearch_loop; } } vp = NULL; varsearch_out: *vpp = vp; return (l); } /* * Used to calculate an array index for global()/local(). Sets *arrayp * to true if this is an array, sets *valp to the array index, returns * the basename of the array. May only be called from global()/local() * and must be their first callee. */ static const char * array_index_calc(const char *n, bool *arrayp, uint32_t *valp) { const char *p; size_t len; char *ap = NULL; *arrayp = false; redo_from_ref: p = skip_varname(n, false); if (innermost_refflag == SRF_NOP && (p != n) && ctype(n[0], C_ALPHX)) { struct tbl *vp; char *vn; strndupx(vn, n, p - n, ATEMP); /* check if this is a reference */ varsearch(e->loc, &vp, vn, hash(vn)); afree(vn, ATEMP); if (vp && (vp->flag & (DEFINED | ASSOC | ARRAY)) == (DEFINED | ASSOC)) { char *cp; /* gotcha! */ strdup2x(cp, str_val(vp), p); afree(ap, ATEMP); n = ap = cp; goto redo_from_ref; } } innermost_refflag = SRF_NOP; if (p != n && ord(*p) == ORD('[') && (len = array_ref_len(p))) { char *sub, *tmp; mksh_ari_t rval; size_t tmplen = p - n; /* calculate the value of the subscript */ *arrayp = true; len -= 2; tmp = alloc((len > tmplen ? len : tmplen) + 1, ATEMP); memcpy(tmp, p + 1, len); tmp[len] = '\0'; sub = substitute(tmp, 0); evaluate(sub, &rval, KSH_UNWIND_ERROR, true); *valp = (uint32_t)rval; afree(sub, ATEMP); memcpy(tmp, n, tmplen); tmp[tmplen] = '\0'; n = tmp; } return (n); } #define vn vname.ro /* * Search for variable, if not found create globally. */ struct tbl * global(const char *n) { return (isglobal(n, true)); } /* search for variable; if not found, return NULL or create globally */ struct tbl * isglobal(const char *n, bool docreate) { struct tbl *vp; union mksh_cchack vname; struct block *l = e->loc; int c; bool array; uint32_t h, val; /* * check to see if this is an array; * dereference namerefs; must come first */ vn = array_index_calc(n, &array, &val); h = hash(vn); c = (unsigned char)vn[0]; if (!ctype(c, C_ALPHX)) { if (array) errorf(Tbadsubst); vp = vtemp; vp->flag = DEFINED; vp->type = 0; vp->areap = ATEMP; if (ctype(c, C_DIGIT)) { if (getn(vn, &c)) { /* main.c:main_init() says 12 */ shf_snprintf(vp->name, 12, Tf_d, c); if (c <= l->argc) { /* setstr can't fail here */ setstr(vp, l->argv[c], KSH_RETURN_ERROR); } } else vp->name[0] = '\0'; vp->flag |= RDONLY; goto out; } vp->name[0] = c; vp->name[1] = '\0'; vp->flag |= RDONLY; if (!c || vn[1] != '\0') goto out; vp->flag |= ISSET|INTEGER; switch (c) { case '$': vp->val.i = kshpid; break; case '!': /* if no job, expand to nothing */ if ((vp->val.i = j_async()) == 0) vp->flag &= ~(ISSET|INTEGER); break; case '?': vp->val.i = exstat & 0xFF; break; case '#': vp->val.i = l->argc; break; case '-': vp->flag &= ~INTEGER; vp->val.s = getoptions(); break; default: vp->flag &= ~(ISSET|INTEGER); } goto out; } l = varsearch(e->loc, &vp, vn, h); if (vp == NULL && docreate) vp = ktenter(&l->vars, vn, h); else docreate = false; if (vp != NULL) { if (array) vp = arraysearch(vp, val); if (docreate) { vp->flag |= DEFINED; if (special(vn)) vp->flag |= SPECIAL; } } out: last_lookup_was_array = array; if (vn != n) afree(vname.rw, ATEMP); return (vp); } /* * Search for local variable, if not found create locally. */ struct tbl * local(const char *n, bool copy) { struct tbl *vp; union mksh_cchack vname; struct block *l = e->loc; bool array; uint32_t h, val; /* * check to see if this is an array; * dereference namerefs; must come first */ vn = array_index_calc(n, &array, &val); h = hash(vn); if (!ctype(*vn, C_ALPHX)) { vp = vtemp; vp->flag = DEFINED|RDONLY; vp->type = 0; vp->areap = ATEMP; goto out; } vp = ktenter(&l->vars, vn, h); if (copy && !(vp->flag & DEFINED)) { struct tbl *vq; varsearch(l->next, &vq, vn, h); if (vq != NULL) { vp->flag |= vq->flag & (EXPORT | INTEGER | RDONLY | LJUST | RJUST | ZEROFIL | LCASEV | UCASEV_AL | INT_U | INT_L); if (vq->flag & INTEGER) vp->type = vq->type; vp->u2.field = vq->u2.field; } } if (array) vp = arraysearch(vp, val); vp->flag |= DEFINED; if (special(vn)) vp->flag |= SPECIAL; out: last_lookup_was_array = array; if (vn != n) afree(vname.rw, ATEMP); return (vp); } #undef vn /* get variable string value */ char * str_val(struct tbl *vp) { char *s; if ((vp->flag&SPECIAL)) getspec(vp); if (!(vp->flag&ISSET)) /* special to dollar() */ s = null; else if (!(vp->flag&INTEGER)) /* string source */ s = vp->val.s + vp->type; else { /* integer source */ mksh_uari_t n; unsigned int base; /** * worst case number length is when base == 2: * 1 (minus) + 2 (base, up to 36) + 1 ('#') + * number of bits in the mksh_uari_t + 1 (NUL) */ char strbuf[1 + 2 + 1 + 8 * sizeof(mksh_uari_t) + 1]; const char *digits = (vp->flag & UCASEV_AL) ? digits_uc : digits_lc; s = strbuf + sizeof(strbuf); if (vp->flag & INT_U) n = vp->val.u; else n = (vp->val.i < 0) ? -vp->val.u : vp->val.u; base = (vp->type == 0) ? 10U : (unsigned int)vp->type; if (base == 1 && n == 0) base = 2; if (base == 1) { size_t sz = 1; *(s = strbuf) = '1'; s[1] = '#'; if (!UTFMODE) s[2] = (unsigned char)n; else if ((n & 0xFF80) == 0xEF80) /* OPTU-16 -> raw octet */ s[2] = asc2rtt(n & 0xFF); else sz = utf_wctomb(s + 2, n); s[2 + sz] = '\0'; } else { *--s = '\0'; do { *--s = digits[n % base]; n /= base; } while (n != 0); if (base != 10) { *--s = '#'; *--s = digits[base % 10]; if (base >= 10) *--s = digits[base / 10]; } if (!(vp->flag & INT_U) && vp->val.i < 0) *--s = '-'; } if (vp->flag & (RJUST|LJUST)) /* case already dealt with */ s = formatstr(vp, s); else strdupx(s, s, ATEMP); } return (s); } /* set variable to string value */ int setstr(struct tbl *vq, const char *s, int error_ok) { bool no_ro_check = tobool(error_ok & 0x4); error_ok &= ~0x4; if ((vq->flag & RDONLY) && !no_ro_check) { warningf(true, Tf_ro, vq->name); if (!error_ok) errorfxz(2); return (0); } if (!(vq->flag&INTEGER)) { /* string dest */ char *salloc = NULL; size_t cursz; if ((vq->flag&ALLOC)) { cursz = strlen(vq->val.s) + 1; #ifndef MKSH_SMALL /* debugging */ if (s >= vq->val.s && s < (vq->val.s + cursz)) { internal_errorf( "setstr: %s=%s: assigning to self", vq->name, s); } #endif } else cursz = 0; if (s && (vq->flag & (UCASEV_AL|LCASEV|LJUST|RJUST))) s = salloc = formatstr(vq, s); if ((vq->flag&EXPORT)) exportprep(vq, s, cursz); else { size_t n = strlen(s) + 1; vq->val.s = aresizeif(cursz, (vq->flag & ALLOC) ? vq->val.s : NULL, n, vq->areap); memcpy(vq->val.s, s, n); vq->flag |= ALLOC; vq->type = 0; } afree(salloc, ATEMP); } else { /* integer dest */ if (!v_evaluate(vq, s, error_ok, true)) return (0); } vq->flag |= ISSET; if ((vq->flag&SPECIAL)) setspec(vq); return (1); } /* set variable to integer */ void setint(struct tbl *vq, mksh_ari_t n) { if (!(vq->flag&INTEGER)) { vtemp->flag = (ISSET|INTEGER); vtemp->type = 0; vtemp->areap = ATEMP; vtemp->val.i = n; /* setstr can't fail here */ setstr(vq, str_val(vtemp), KSH_RETURN_ERROR); } else vq->val.i = n; vq->flag |= ISSET; if ((vq->flag&SPECIAL)) setspec(vq); } static int getint(struct tbl *vp, mksh_ari_u *nump, bool arith) { mksh_uari_t c, num = 0, base = 10; const char *s; bool have_base = false, neg = false; if (vp->flag & SPECIAL) getspec(vp); /* XXX is it possible for ISSET to be set and val.s to be NULL? */ if (!(vp->flag & ISSET) || (!(vp->flag & INTEGER) && vp->val.s == NULL)) return (-1); if (vp->flag & INTEGER) { nump->i = vp->val.i; return (vp->type); } s = vp->val.s + vp->type; do { c = (unsigned char)*s++; } while (ctype(c, C_SPACE)); switch (c) { case '-': neg = true; /* FALLTHROUGH */ case '+': c = (unsigned char)*s++; break; } if (c == '0' && arith) { if (ksh_eq(s[0], 'X', 'x')) { /* interpret as hexadecimal */ base = 16; ++s; goto getint_c_style_base; } else if (Flag(FPOSIX) && ctype(s[0], C_DIGIT) && !(vp->flag & ZEROFIL)) { /* interpret as octal (deprecated) */ base = 8; getint_c_style_base: have_base = true; c = (unsigned char)*s++; } } do { if (c == '#') { /* ksh-style base determination */ if (have_base || num < 1) return (-1); if ((base = num) == 1) { /* mksh-specific extension */ unsigned int wc; if (!UTFMODE) wc = *(const unsigned char *)s; else if (utf_mbtowc(&wc, s) == (size_t)-1) /* OPTU-8 -> OPTU-16 */ /* * (with a twist: 1#\uEF80 converts * the same as 1#\x80 does, thus is * not round-tripping correctly XXX) */ wc = 0xEF00 + rtt2asc(*s); nump->u = (mksh_uari_t)wc; return (1); } else if (base > 36) base = 10; num = 0; have_base = true; continue; } if (ctype(c, C_DIGIT)) c = ksh_numdig(c); else if (ctype(c, C_UPPER)) c = ksh_numuc(c) + 10; else if (ctype(c, C_LOWER)) c = ksh_numlc(c) + 10; else return (-1); if (c >= base) return (-1); /* handle overflow as truncation */ num = num * base + c; } while ((c = (unsigned char)*s++)); if (neg) num = -num; nump->u = num; return (base); } /* * convert variable vq to integer variable, setting its value from vp * (vq and vp may be the same) */ struct tbl * setint_v(struct tbl *vq, struct tbl *vp, bool arith) { int base; mksh_ari_u num; if ((base = getint(vp, &num, arith)) == -1) return (NULL); setint_n(vq, num.i, 0); if (vq->type == 0) /* default base */ vq->type = base; return (vq); } /* convert variable vq to integer variable, setting its value to num */ void setint_n(struct tbl *vq, mksh_ari_t num, int newbase) { if (!(vq->flag & INTEGER) && (vq->flag & ALLOC)) { vq->flag &= ~ALLOC; vq->type = 0; afree(vq->val.s, vq->areap); } vq->val.i = num; if (newbase != 0) vq->type = newbase; vq->flag |= ISSET|INTEGER; if (vq->flag&SPECIAL) setspec(vq); } static char * formatstr(struct tbl *vp, const char *s) { int olen, nlen; char *p, *q; size_t psiz; olen = (int)utf_mbswidth(s); if (vp->flag & (RJUST|LJUST)) { if (!vp->u2.field) /* default field width */ vp->u2.field = olen; nlen = vp->u2.field; } else nlen = olen; p = alloc((psiz = nlen * /* MB_LEN_MAX */ 3 + 1), ATEMP); if (vp->flag & (RJUST|LJUST)) { int slen = olen; if (vp->flag & RJUST) { const char *qq; int n = 0; qq = utf_skipcols(s, slen, &slen); /* strip trailing spaces (AT&T uses qq[-1] == ' ') */ while (qq > s && ctype(qq[-1], C_SPACE)) { --qq; --slen; } if (vp->flag & ZEROFIL && vp->flag & INTEGER) { if (!s[0] || !s[1]) goto uhm_no; if (s[1] == '#') n = 2; else if (s[2] == '#') n = 3; uhm_no: if (vp->u2.field <= n) n = 0; } if (n) { memcpy(p, s, n); s += n; } while (slen > vp->u2.field) slen -= utf_widthadj(s, &s); if (vp->u2.field - slen) memset(p + n, (vp->flag & ZEROFIL) ? '0' : ' ', vp->u2.field - slen); slen -= n; shf_snprintf(p + vp->u2.field - slen, psiz - (vp->u2.field - slen), "%.*s", slen, s); } else { /* strip leading spaces/zeros */ while (ctype(*s, C_SPACE)) s++; if (vp->flag & ZEROFIL) while (*s == '0') s++; shf_snprintf(p, psiz, "%-*.*s", vp->u2.field, vp->u2.field, s); } } else memcpy(p, s, strlen(s) + 1); if (vp->flag & UCASEV_AL) { for (q = p; *q; q++) *q = ksh_toupper(*q); } else if (vp->flag & LCASEV) { for (q = p; *q; q++) *q = ksh_tolower(*q); } return (p); } /* * make vp->val.s be "name=value" for quick exporting. */ static void exportprep(struct tbl *vp, const char *val, size_t cursz) { char *cp = (vp->flag & ALLOC) ? vp->val.s : NULL; size_t namelen = strlen(vp->name); size_t vallen = strlen(val) + 1; vp->flag |= ALLOC; vp->type = namelen + 1; /* since name+val are both in memory this can go unchecked */ vp->val.s = aresizeif(cursz, cp, vp->type + vallen, vp->areap); memmove(vp->val.s + vp->type, val == cp ? vp->val.s : val, vallen); memcpy(vp->val.s, vp->name, namelen); vp->val.s[namelen] = '='; } /* * lookup variable (according to (set&LOCAL)), set its attributes * (INTEGER, RDONLY, EXPORT, TRACE, LJUST, RJUST, ZEROFIL, LCASEV, * UCASEV_AL), and optionally set its value if an assignment. */ struct tbl * typeset(const char *var, uint32_t set, uint32_t clr, int field, int base) { return (vtypeset(NULL, var, set, clr, field, base)); } static struct tbl * vtypeset(int *ep, const char *var, uint32_t set, uint32_t clr, int field, int base) { struct tbl *vp; struct tbl *vpbase, *t; char *tvar, tvarbuf[32]; const char *val; size_t len; bool vappend = false; enum namerefflag new_refflag = SRF_NOP; if (ep) *ep = 0; if ((set & (ARRAY | ASSOC)) == ASSOC) { new_refflag = SRF_ENABLE; set &= ~(ARRAY | ASSOC); } if ((clr & (ARRAY | ASSOC)) == ASSOC) { new_refflag = SRF_DISABLE; clr &= ~(ARRAY | ASSOC); } /* check for valid variable name, search for value */ val = skip_varname(var, false); if (val == var) { /* no variable name given */ return (NULL); } if (ord(*val) == ORD('[')) { if (new_refflag != SRF_NOP) return (maybe_errorf(ep, 1, Tf_sD_s, var, "reference variable can't be an array"), NULL); len = array_ref_len(val); if (len == 0) return (NULL); /* * IMPORT is only used when the shell starts up and is * setting up its environment. Allow only simple array * references at this time since parameter/command * substitution is performed on the [expression] which * would be a major security hole. */ if (set & IMPORT) { size_t i; for (i = 1; i < len - 1; i++) if (!ctype(val[i], C_DIGIT)) return (NULL); } val += len; } if (ord(val[0]) == ORD('=')) { len = val - var; tvar = len < sizeof(tvarbuf) ? tvarbuf : alloc(len + 1, ATEMP); memcpy(tvar, var, len); tvar[len] = '\0'; ++val; } else if (set & IMPORT) { /* environment invalid variable name or no assignment */ return (NULL); } else if (ord(val[0]) == ORD('+') && ord(val[1]) == ORD('=')) { len = val - var; tvar = len < sizeof(tvarbuf) ? tvarbuf : alloc(len + 1, ATEMP); memcpy(tvar, var, len); tvar[len] = '\0'; val += 2; vappend = true; } else if (val[0] != '\0') { /* other invalid variable names (not from environment) */ return (NULL); } else { /* just varname with no value part nor equals sign */ len = strlen(var); tvar = len < sizeof(tvarbuf) ? tvarbuf : alloc(len + 1, ATEMP); memcpy(tvar, var, len); tvar[len] = '\0'; val = NULL; /* handle foo[*] => foo (whole array) mapping for R39b */ if (len > 3 && ord(tvar[len - 3]) == ORD('[') && ord(tvar[len - 2]) == ORD('*') && ord(tvar[len - 1]) == ORD(']')) tvar[len - 3] = '\0'; } if (new_refflag == SRF_ENABLE) { const char *qval, *ccp; /* bail out on 'nameref foo+=bar' */ if (vappend) return (maybe_errorf(ep, 1, "appending not allowed for nameref"), NULL); /* find value if variable already exists */ if ((qval = val) == NULL) { varsearch(e->loc, &vp, tvar, hash(tvar)); if (vp == NULL) goto nameref_empty; qval = str_val(vp); } /* check target value for being a valid variable name */ ccp = skip_varname(qval, false); if (ccp == qval) { int c; if (!(c = (unsigned char)qval[0])) goto nameref_empty; else if (ctype(c, C_DIGIT) && getn(qval, &c)) goto nameref_rhs_checked; else if (qval[1] == '\0') switch (c) { case '$': case '!': case '?': case '#': case '-': goto nameref_rhs_checked; } nameref_empty: return (maybe_errorf(ep, 1, Tf_sD_s, var, "empty nameref target"), NULL); } len = (ord(*ccp) == ORD('[')) ? array_ref_len(ccp) : 0; if (ccp[len]) { /* * works for cases "no array", "valid array with * junk after it" and "invalid array"; in the * latter case, len is also 0 and points to '[' */ return (maybe_errorf(ep, 1, Tf_sD_s, qval, "nameref target not a valid parameter name"), NULL); } nameref_rhs_checked: /* prevent nameref loops */ while (qval) { if (!strcmp(qval, tvar)) return (maybe_errorf(ep, 1, Tf_sD_s, qval, "expression recurses on parameter"), NULL); varsearch(e->loc, &vp, qval, hash(qval)); qval = NULL; if (vp && ((vp->flag & (ARRAY | ASSOC)) == ASSOC)) qval = str_val(vp); } } /* prevent typeset from creating a local PATH/ENV/SHELL */ if (Flag(FRESTRICTED) && (strcmp(tvar, TPATH) == 0 || strcmp(tvar, TENV) == 0 || strcmp(tvar, TSHELL) == 0)) return (maybe_errorf(ep, 1, Tf_sD_s, tvar, "restricted"), NULL); innermost_refflag = new_refflag; vp = (set & LOCAL) ? local(tvar, tobool(set & LOCAL_COPY)) : global(tvar); if (new_refflag == SRF_DISABLE && (vp->flag & (ARRAY|ASSOC)) == ASSOC) vp->flag &= ~ASSOC; else if (new_refflag == SRF_ENABLE) { if (vp->flag & ARRAY) { struct tbl *a, *tmp; /* free up entire array */ for (a = vp->u.array; a; ) { tmp = a; a = a->u.array; if (tmp->flag & ALLOC) afree(tmp->val.s, tmp->areap); afree(tmp, tmp->areap); } vp->u.array = NULL; vp->flag &= ~ARRAY; } vp->flag |= ASSOC; } set &= ~(LOCAL|LOCAL_COPY); vpbase = (vp->flag & ARRAY) ? global(arrayname(tvar)) : vp; /* * only allow export and readonly flag to be set; AT&T ksh * allows any attribute to be changed which means it can be * truncated or modified (-L/-R/-Z/-i) */ if ((vpbase->flag & RDONLY) && (val || clr || (set & ~(EXPORT | RDONLY)))) return (maybe_errorf(ep, 2, Tf_ro, tvar), NULL); if (tvar != tvarbuf) afree(tvar, ATEMP); /* most calls are with set/clr == 0 */ if (set | clr) { bool ok = true; /* * XXX if x[0] isn't set, there will be problems: need * to have one copy of attributes for arrays... */ for (t = vpbase; t; t = t->u.array) { bool fake_assign; char *s = NULL; char *free_me = NULL; fake_assign = (t->flag & ISSET) && (!val || t != vp) && ((set & (UCASEV_AL|LCASEV|LJUST|RJUST|ZEROFIL)) || ((t->flag & INTEGER) && (clr & INTEGER)) || (!(t->flag & INTEGER) && (set & INTEGER))); if (fake_assign) { if (t->flag & INTEGER) { s = str_val(t); free_me = NULL; } else { s = t->val.s + t->type; free_me = (t->flag & ALLOC) ? t->val.s : NULL; } t->flag &= ~ALLOC; } if (!(t->flag & INTEGER) && (set & INTEGER)) { t->type = 0; t->flag &= ~ALLOC; } t->flag = (t->flag | set) & ~clr; /* * Don't change base if assignment is to be * done, in case assignment fails. */ if ((set & INTEGER) && base > 0 && (!val || t != vp)) t->type = base; if (set & (LJUST|RJUST|ZEROFIL)) t->u2.field = field; if (fake_assign) { if (!setstr(t, s, KSH_RETURN_ERROR)) { /* * Somewhat arbitrary action * here: zap contents of * variable, but keep the flag * settings. */ ok = false; if (t->flag & INTEGER) t->flag &= ~ISSET; else { if (t->flag & ALLOC) afree(t->val.s, t->areap); t->flag &= ~(ISSET|ALLOC); t->type = 0; } } afree(free_me, t->areap); } } if (!ok) return (maybe_errorf(ep, 1, NULL), NULL); } if (vappend) { size_t tlen; if ((vp->flag & (ISSET|ALLOC|SPECIAL|INTEGER|UCASEV_AL|LCASEV|LJUST|RJUST)) != (ISSET|ALLOC)) { /* cannot special-case this */ strdup2x(tvar, str_val(vp), val); val = tvar; goto vassign; } /* trivial string appending */ len = strlen(vp->val.s); tlen = strlen(val) + 1; vp->val.s = aresize(vp->val.s, len + tlen, vp->areap); memcpy(vp->val.s + len, val, tlen); } else if (val != NULL) { vassign: if (vp->flag&INTEGER) { /* do not zero base before assignment */ setstr(vp, val, KSH_UNWIND_ERROR | 0x4); /* done after assignment to override default */ if (base > 0) vp->type = base; } else /* setstr can't fail (readonly check already done) */ setstr(vp, val, KSH_RETURN_ERROR | 0x4); /* came here from vappend? need to free temp val */ if (vappend) afree(tvar, ATEMP); } /* only x[0] is ever exported, so use vpbase */ if ((vpbase->flag & (EXPORT|INTEGER)) == EXPORT && vpbase->type == 0) exportprep(vpbase, (vpbase->flag & ISSET) ? vpbase->val.s : null, 0); return (vp); } /** * Unset a variable. The flags can be: * |1 = tear down entire array * |2 = keep attributes, only unset content */ void unset(struct tbl *vp, int flags) { if (vp->flag & ALLOC) afree(vp->val.s, vp->areap); if ((vp->flag & ARRAY) && (flags & 1)) { struct tbl *a, *tmp; /* free up entire array */ for (a = vp->u.array; a; ) { tmp = a; a = a->u.array; if (tmp->flag & ALLOC) afree(tmp->val.s, tmp->areap); afree(tmp, tmp->areap); } vp->u.array = NULL; } if (flags & 2) { vp->flag &= ~(ALLOC|ISSET); return; } /* if foo[0] is being unset, the remainder of the array is kept... */ vp->flag &= SPECIAL | ((flags & 1) ? 0 : ARRAY|DEFINED); if (vp->flag & SPECIAL) /* responsible for 'unspecial'ing var */ unsetspec(vp, true); } /* * Return a pointer to the first char past a legal variable name * (returns the argument if there is no legal name, returns a pointer to * the terminating NUL if whole string is legal). */ const char * skip_varname(const char *s, bool aok) { size_t alen; if (s && ctype(*s, C_ALPHX)) { do { ++s; } while (ctype(*s, C_ALNUX)); if (aok && ord(*s) == ORD('[') && (alen = array_ref_len(s))) s += alen; } return (s); } /* Return a pointer to the first character past any legal variable name */ const char * skip_wdvarname(const char *s, /* skip array de-reference? */ bool aok) { if (s[0] == CHAR && ctype(s[1], C_ALPHX)) { do { s += 2; } while (s[0] == CHAR && ctype(s[1], C_ALNUX)); if (aok && s[0] == CHAR && ord(s[1]) == ORD('[')) { /* skip possible array de-reference */ const char *p = s; char c; int depth = 0; while (/* CONSTCOND */ 1) { if (p[0] != CHAR) break; c = p[1]; p += 2; if (ord(c) == ORD('[')) depth++; else if (ord(c) == ORD(']') && --depth == 0) { s = p; break; } } } } return (s); } /* Check if coded string s is a variable name */ int is_wdvarname(const char *s, bool aok) { const char *p = skip_wdvarname(s, aok); return (p != s && p[0] == EOS); } /* Check if coded string s is a variable assignment */ int is_wdvarassign(const char *s) { const char *p = skip_wdvarname(s, true); return (p != s && p[0] == CHAR && (p[1] == '=' || (p[1] == '+' && p[2] == CHAR && p[3] == '='))); } /* * Make the exported environment from the exported names in the dictionary. */ char ** makenv(void) { ssize_t i; struct block *l; XPtrV denv; struct tbl *vp, **vpp; XPinit(denv, 64); for (l = e->loc; l != NULL; l = l->next) { vpp = l->vars.tbls; i = 1 << (l->vars.tshift); while (--i >= 0) if ((vp = *vpp++) != NULL && (vp->flag&(ISSET|EXPORT)) == (ISSET|EXPORT)) { struct block *l2; struct tbl *vp2; uint32_t h = hash(vp->name); /* unexport any redefined instances */ for (l2 = l->next; l2 != NULL; l2 = l2->next) { vp2 = ktsearch(&l2->vars, vp->name, h); if (vp2 != NULL) vp2->flag &= ~EXPORT; } if ((vp->flag&INTEGER)) { /* integer to string */ char *val; val = str_val(vp); vp->flag &= ~(INTEGER|RDONLY|SPECIAL); /* setstr can't fail here */ setstr(vp, val, KSH_RETURN_ERROR); } #ifdef __OS2__ /* these special variables are not exported */ if (!strcmp(vp->name, "BEGINLIBPATH") || !strcmp(vp->name, "ENDLIBPATH") || !strcmp(vp->name, "LIBPATHSTRICT")) continue; #endif XPput(denv, vp->val.s); } if (l->flags & BF_STOPENV) break; } XPput(denv, NULL); return ((char **)XPclose(denv)); } /* * handle special variables with side effects - PATH, SECONDS. */ /* Test if name is a special parameter */ static int special(const char *name) { struct tbl *tp; tp = ktsearch(&specials, name, hash(name)); return (tp && (tp->flag & ISSET) ? tp->type : V_NONE); } /* Make a variable non-special */ static void unspecial(const char *name) { struct tbl *tp; tp = ktsearch(&specials, name, hash(name)); if (tp) ktdelete(tp); } static time_t seconds; /* time SECONDS last set */ static mksh_uari_t user_lineno; /* what user set $LINENO to */ /* minimum values from the OS we consider sane, lowered for R53 */ #define MIN_COLS 4 #define MIN_LINS 2 static void getspec(struct tbl *vp) { mksh_ari_u num; int st; struct timeval tv; switch ((st = special(vp->name))) { case V_COLUMNS: case V_LINES: /* * Do NOT export COLUMNS/LINES. Many applications * check COLUMNS/LINES before checking ws.ws_col/row, * so if the app is started with C/L in the environ * and the window is then resized, the app won't * see the change cause the environ doesn't change. */ if (got_winch) change_winsz(); break; } switch (st) { case V_BASHPID: num.u = (mksh_uari_t)procpid; break; case V_COLUMNS: num.i = x_cols; break; case V_HISTSIZE: num.i = histsize; break; case V_LINENO: num.u = (mksh_uari_t)current_lineno + user_lineno; break; case V_LINES: num.i = x_lins; break; case V_EPOCHREALTIME: { /* 10(%u) + 1(.) + 6 + NUL */ char buf[18]; vp->flag &= ~SPECIAL; mksh_TIME(tv); shf_snprintf(buf, sizeof(buf), "%u.%06u", (unsigned)tv.tv_sec, (unsigned)tv.tv_usec); setstr(vp, buf, KSH_RETURN_ERROR | 0x4); vp->flag |= SPECIAL; return; } case V_OPTIND: num.i = user_opt.uoptind; break; case V_RANDOM: num.i = rndget(); break; case V_SECONDS: /* * On start up the value of SECONDS is used before * it has been set - don't do anything in this case * (see initcoms[] in main.c). */ if (vp->flag & ISSET) { mksh_TIME(tv); num.i = tv.tv_sec - seconds; } else return; break; default: /* do nothing, do not touch vp at all */ return; } vp->flag &= ~SPECIAL; setint_n(vp, num.i, 0); vp->flag |= SPECIAL; } static void setspec(struct tbl *vp) { mksh_ari_u num; char *s; int st = special(vp->name); #ifdef MKSH_DOSPATH switch (st) { case V_PATH: case V_TMPDIR: #ifdef __OS2__ case V_BEGINLIBPATH: case V_ENDLIBPATH: #endif /* convert backslashes to slashes for convenience */ if (!(vp->flag&INTEGER)) { s = str_val(vp); do { if (*s == ORD('\\')) *s = '/'; } while (*s++); } break; } #endif switch (st) { #ifdef __OS2__ case V_BEGINLIBPATH: case V_ENDLIBPATH: case V_LIBPATHSTRICT: setextlibpath(vp->name, str_val(vp)); return; #endif #if HAVE_PERSISTENT_HISTORY case V_HISTFILE: sethistfile(str_val(vp)); return; #endif case V_IFS: set_ifs(str_val(vp)); return; case V_PATH: afree(path, APERM); s = str_val(vp); strdupx(path, s, APERM); /* clear tracked aliases */ flushcom(true); return; #ifndef MKSH_NO_CMDLINE_EDITING case V_TERM: x_initterm(str_val(vp)); return; #endif case V_TMPDIR: afree(tmpdir, APERM); tmpdir = NULL; /* * Use tmpdir iff it is an absolute path, is writable * and searchable and is a directory... */ { struct stat statb; s = str_val(vp); /* LINTED use of access */ if (mksh_abspath(s) && access(s, W_OK|X_OK) == 0 && stat(s, &statb) == 0 && S_ISDIR(statb.st_mode)) strdupx(tmpdir, s, APERM); } return; /* common sub-cases */ case V_COLUMNS: case V_LINES: if (vp->flag & IMPORT) { /* do not touch */ unspecial(vp->name); vp->flag &= ~SPECIAL; return; } /* FALLTHROUGH */ case V_HISTSIZE: case V_LINENO: case V_OPTIND: case V_RANDOM: case V_SECONDS: case V_TMOUT: vp->flag &= ~SPECIAL; if (getint(vp, &num, false) == -1) { s = str_val(vp); if (st != V_RANDOM) errorf(Tf_sD_sD_s, vp->name, Tbadnum, s); num.u = hash(s); } vp->flag |= SPECIAL; break; #ifdef MKSH_EARLY_LOCALE_TRACKING case V_LANG: case V_LC_ALL: case V_LC_CTYPE: recheck_ctype(); return; #endif default: /* do nothing, do not touch vp at all */ return; } /* process the singular parts of the common cases */ switch (st) { case V_COLUMNS: if (num.i >= MIN_COLS) x_cols = num.i; break; case V_HISTSIZE: sethistsize(num.i); break; case V_LINENO: /* The -1 is because line numbering starts at 1. */ user_lineno = num.u - (mksh_uari_t)current_lineno - 1; break; case V_LINES: if (num.i >= MIN_LINS) x_lins = num.i; break; case V_OPTIND: getopts_reset((int)num.i); break; case V_RANDOM: /* * mksh R39d+ no longer has the traditional repeatability * of $RANDOM sequences, but always retains state */ rndset((unsigned long)num.u); break; case V_SECONDS: { struct timeval tv; mksh_TIME(tv); seconds = tv.tv_sec - num.i; } break; case V_TMOUT: ksh_tmout = num.i >= 0 ? num.i : 0; break; } } static void unsetspec(struct tbl *vp, bool dounset) { /* * AT&T ksh man page says OPTIND, OPTARG and _ lose special * meaning, but OPTARG does not (still set by getopts) and _ is * also still set in various places. Don't know what AT&T does * for HISTSIZE, HISTFILE. Unsetting these in AT&T ksh does not * loose the 'specialness': IFS, COLUMNS, PATH, TMPDIR */ switch (special(vp->name)) { #ifdef __OS2__ case V_BEGINLIBPATH: case V_ENDLIBPATH: case V_LIBPATHSTRICT: setextlibpath(vp->name, ""); return; #endif #if HAVE_PERSISTENT_HISTORY case V_HISTFILE: sethistfile(NULL); return; #endif case V_IFS: set_ifs(TC_IFSWS); return; case V_PATH: afree(path, APERM); strdupx(path, def_path, APERM); /* clear tracked aliases */ flushcom(true); return; #ifndef MKSH_NO_CMDLINE_EDITING case V_TERM: x_initterm(null); return; #endif case V_TMPDIR: /* should not become unspecial */ if (tmpdir) { afree(tmpdir, APERM); tmpdir = NULL; } return; case V_LINENO: case V_RANDOM: case V_SECONDS: case V_TMOUT: /* AT&T ksh leaves previous value in place */ unspecial(vp->name); return; #ifdef MKSH_EARLY_LOCALE_TRACKING case V_LANG: case V_LC_ALL: case V_LC_CTYPE: recheck_ctype(); return; #endif /* should not become unspecial, but allow unsetting */ case V_COLUMNS: case V_LINES: if (dounset) unspecial(vp->name); return; } } /* * Search for (and possibly create) a table entry starting with * vp, indexed by val. */ struct tbl * arraysearch(struct tbl *vp, uint32_t val) { struct tbl *prev, *curr, *news; size_t len; vp->flag = (vp->flag | (ARRAY | DEFINED)) & ~ASSOC; /* the table entry is always [0] */ if (val == 0) return (vp); prev = vp; curr = vp->u.array; while (curr && curr->ua.index < val) { prev = curr; curr = curr->u.array; } if (curr && curr->ua.index == val) { if (curr->flag&ISSET) return (curr); news = curr; } else news = NULL; if (!news) { len = strlen(vp->name); checkoktoadd(len, 1 + offsetof(struct tbl, name[0])); news = alloc(offsetof(struct tbl, name[0]) + ++len, vp->areap); memcpy(news->name, vp->name, len); } news->flag = (vp->flag & ~(ALLOC|DEFINED|ISSET|SPECIAL)) | AINDEX; news->type = vp->type; news->areap = vp->areap; news->u2.field = vp->u2.field; news->ua.index = val; if (curr != news) { /* not reusing old array entry */ prev->u.array = news; news->u.array = curr; } return (news); } /* * Return the length of an array reference (eg, [1+2]) - cp is assumed * to point to the open bracket. Returns 0 if there is no matching * closing bracket. * * XXX this should parse the actual arithmetic syntax */ size_t array_ref_len(const char *cp) { const char *s = cp; char c; int depth = 0; while ((c = *s++) && (ord(c) != ORD(']') || --depth)) if (ord(c) == ORD('[')) depth++; if (!c) return (0); return (s - cp); } /* * Make a copy of the base of an array name */ char * arrayname(const char *str) { const char *p; char *rv; if (!(p = cstrchr(str, '['))) /* Shouldn't happen, but why worry? */ strdupx(rv, str, ATEMP); else strndupx(rv, str, p - str, ATEMP); return (rv); } /* set (or overwrite, if reset) the array variable var to the values in vals */ mksh_uari_t set_array(const char *var, bool reset, const char **vals) { struct tbl *vp, *vq; mksh_uari_t i = 0, j = 0; const char *ccp = var; char *cp = NULL; size_t n; /* to get local array, use "local foo; set -A foo" */ n = strlen(var); if (n > 0 && var[n - 1] == '+') { /* append mode */ reset = false; strndupx(cp, var, n - 1, ATEMP); ccp = cp; } vp = global(ccp); /* Note: AT&T ksh allows set -A but not set +A of a read-only var */ if ((vp->flag&RDONLY)) errorfx(2, Tf_ro, ccp); /* This code is quite non-optimal */ if (reset) { /* trash existing values and attributes */ unset(vp, 1); /* allocate-by-access the [0] element to keep in scope */ arraysearch(vp, 0); /* honour set -o allexport */ if (Flag(FEXPORT)) typeset(ccp, EXPORT, 0, 0, 0); } /* * TODO: would be nice for assignment to completely succeed or * completely fail. Only really effects integer arrays: * evaluation of some of vals[] may fail... */ if (cp != NULL) { /* find out where to set when appending */ for (vq = vp; vq; vq = vq->u.array) { if (!(vq->flag & ISSET)) continue; if (arrayindex(vq) >= j) j = arrayindex(vq) + 1; } afree(cp, ATEMP); } while ((ccp = vals[i])) { #if 0 /* temporarily taken out due to regression */ if (ord(*ccp) == ORD('[')) { int level = 0; while (*ccp) { if (ord(*ccp) == ORD(']') && --level == 0) break; if (ord(*ccp) == ORD('[')) ++level; ++ccp; } if (ord(*ccp) == ORD(']') && level == 0 && ord(ccp[1]) == ORD('=')) { strndupx(cp, vals[i] + 1, ccp - (vals[i] + 1), ATEMP); evaluate(substitute(cp, 0), (mksh_ari_t *)&j, KSH_UNWIND_ERROR, true); afree(cp, ATEMP); ccp += 2; } else ccp = vals[i]; } #endif vq = arraysearch(vp, j); /* would be nice to deal with errors here... (see above) */ setstr(vq, ccp, KSH_RETURN_ERROR); i++; j++; } return (i); } void change_winsz(void) { struct timeval tv; mksh_TIME(tv); BAFHUpdateMem_mem(qh_state, &tv, sizeof(tv)); #ifdef TIOCGWINSZ /* check if window size has changed */ if (tty_init_fd() < 2) { struct winsize ws; if (ioctl(tty_fd, TIOCGWINSZ, &ws) >= 0) { if (ws.ws_col) x_cols = ws.ws_col; if (ws.ws_row) x_lins = ws.ws_row; } } #endif /* bounds check for sane values, use defaults otherwise */ if (x_cols < MIN_COLS) x_cols = 80; if (x_lins < MIN_LINS) x_lins = 24; #ifdef SIGWINCH got_winch = 0; #endif } uint32_t hash(const void *s) { register uint32_t h; BAFHInit(h); BAFHUpdateStr_reg(h, s); BAFHFinish_reg(h); return (h); } uint32_t chvt_rndsetup(const void *bp, size_t sz) { register uint32_t h; /* use LCG as seed but try to get them to deviate immediately */ h = lcg_state; (void)rndget(); BAFHFinish_reg(h); /* variation through pid, ppid, and the works */ BAFHUpdateMem_reg(h, &rndsetupstate, sizeof(rndsetupstate)); /* some variation, some possibly entropy, depending on OE */ BAFHUpdateMem_reg(h, bp, sz); /* mix them all up */ BAFHFinish_reg(h); return (h); } mksh_ari_t rndget(void) { /* * this is the same Linear Congruential PRNG as Borland * C/C++ allegedly uses in its built-in rand() function */ return (((lcg_state = 22695477 * lcg_state + 1) >> 16) & 0x7FFF); } void rndset(unsigned long v) { register uint32_t h; #if defined(arc4random_pushb_fast) || defined(MKSH_A4PB) register uint32_t t; #endif struct { struct timeval tv; void *sp; uint32_t qh; pid_t pp; short r; } z; /* clear the allocated space, for valgrind and to avoid UB */ memset(&z, 0, sizeof(z)); h = lcg_state; BAFHFinish_reg(h); BAFHUpdateMem_reg(h, &v, sizeof(v)); mksh_TIME(z.tv); z.sp = &lcg_state; z.pp = procpid; z.r = (short)rndget(); #if defined(arc4random_pushb_fast) || defined(MKSH_A4PB) t = qh_state; BAFHFinish_reg(t); z.qh = (t & 0xFFFF8000) | rndget(); lcg_state = (t << 15) | rndget(); /* * either we have very chap entropy get and push available, * with malloc() pulling in this code already anyway, or the * user requested us to use the old functions */ t = h; BAFHUpdateMem_reg(t, &lcg_state, sizeof(lcg_state)); BAFHFinish_reg(t); lcg_state = t; #if defined(arc4random_pushb_fast) arc4random_pushb_fast(&lcg_state, sizeof(lcg_state)); lcg_state = arc4random(); #else lcg_state = arc4random_pushb(&lcg_state, sizeof(lcg_state)); #endif BAFHUpdateMem_reg(h, &lcg_state, sizeof(lcg_state)); #else z.qh = qh_state; #endif BAFHUpdateMem_reg(h, &z, sizeof(z)); BAFHFinish_reg(h); lcg_state = h; } void rndpush(const void *s) { register uint32_t h = qh_state; BAFHUpdateStr_reg(h, s); BAFHUpdateOctet_reg(h, 0); qh_state = h; } /* record last glob match */ void record_match(const char *istr) { struct tbl *vp; vp = local("KSH_MATCH", false); unset(vp, 1); vp->flag = DEFINED | RDONLY; setstr(vp, istr, 0x4); } /* typeset, export and readonly */ int c_typeset(const char **wp) { struct tbl *vp, **p; uint32_t fset = 0, fclr = 0, flag; int thing = 0, field = 0, base = 0, i; struct block *l; const char *opts; const char *fieldstr = NULL, *basestr = NULL; bool localv = false, func = false, pflag = false, istset = true; enum namerefflag new_refflag = SRF_NOP; switch (**wp) { /* export */ case 'e': fset |= EXPORT; istset = false; break; /* readonly */ case 'r': fset |= RDONLY; istset = false; break; /* set */ case 's': /* called with 'typeset -' */ break; /* typeset */ case 't': localv = true; break; } /* see comment below regarding possible opions */ opts = istset ? "L#R#UZ#afgi#lnprtux" : "p"; builtin_opt.flags |= GF_PLUSOPT; /* * AT&T ksh seems to have 0-9 as options which are multiplied * to get a number that is used with -L, -R, -Z or -i (eg, -1R2 * sets right justify in a field of 12). This allows options * to be grouped in an order (eg, -Lu12), but disallows -i8 -L3 and * does not allow the number to be specified as a separate argument * Here, the number must follow the RLZi option, but is optional * (see the # kludge in ksh_getopt()). */ while ((i = ksh_getopt(wp, &builtin_opt, opts)) != -1) { flag = 0; switch (i) { case 'L': flag = LJUST; fieldstr = builtin_opt.optarg; break; case 'R': flag = RJUST; fieldstr = builtin_opt.optarg; break; case 'U': /* * AT&T ksh uses u, but this conflicts with * upper/lower case. If this option is changed, * need to change the -U below as well */ flag = INT_U; break; case 'Z': flag = ZEROFIL; fieldstr = builtin_opt.optarg; break; case 'a': /* * this is supposed to set (-a) or unset (+a) the * indexed array attribute; it does nothing on an * existing regular string or indexed array though */ break; case 'f': func = true; break; case 'g': localv = (builtin_opt.info & GI_PLUS) ? true : false; break; case 'i': flag = INTEGER; basestr = builtin_opt.optarg; break; case 'l': flag = LCASEV; break; case 'n': new_refflag = (builtin_opt.info & GI_PLUS) ? SRF_DISABLE : SRF_ENABLE; break; /* export, readonly: POSIX -p flag */ case 'p': /* typeset: show values as well */ pflag = true; if (istset) continue; break; case 'r': flag = RDONLY; break; case 't': flag = TRACE; break; case 'u': /* upper case / autoload */ flag = UCASEV_AL; break; case 'x': flag = EXPORT; break; case '?': return (1); } if (builtin_opt.info & GI_PLUS) { fclr |= flag; fset &= ~flag; thing = '+'; } else { fset |= flag; fclr &= ~flag; thing = '-'; } } if (fieldstr && !getn(fieldstr, &field)) { bi_errorf(Tf_sD_s, Tbadnum, fieldstr); return (1); } if (basestr) { if (!getn(basestr, &base)) { bi_errorf(Tf_sD_s, "bad integer base", basestr); return (1); } if (base < 1 || base > 36) base = 10; } if (!(builtin_opt.info & GI_MINUSMINUS) && wp[builtin_opt.optind] && (wp[builtin_opt.optind][0] == '-' || wp[builtin_opt.optind][0] == '+') && wp[builtin_opt.optind][1] == '\0') { thing = wp[builtin_opt.optind][0]; builtin_opt.optind++; } if (func && (((fset|fclr) & ~(TRACE|UCASEV_AL|EXPORT)) || new_refflag != SRF_NOP)) { bi_errorf("only -t, -u and -x options may be used with -f"); return (1); } if (wp[builtin_opt.optind]) { /* * Take care of exclusions. * At this point, flags in fset are cleared in fclr and vice * versa. This property should be preserved. */ if (fset & LCASEV) /* LCASEV has priority over UCASEV_AL */ fset &= ~UCASEV_AL; if (fset & LJUST) /* LJUST has priority over RJUST */ fset &= ~RJUST; if ((fset & (ZEROFIL|LJUST)) == ZEROFIL) { /* -Z implies -ZR */ fset |= RJUST; fclr &= ~RJUST; } /* * Setting these attributes clears the others, unless they * are also set in this command */ if ((fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL | LCASEV | INTEGER | INT_U | INT_L)) || new_refflag != SRF_NOP) fclr |= ~fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL | LCASEV | INTEGER | INT_U | INT_L); } if (new_refflag != SRF_NOP) { fclr &= ~(ARRAY | ASSOC); fset &= ~(ARRAY | ASSOC); fclr |= EXPORT; fset |= ASSOC; if (new_refflag == SRF_DISABLE) fclr |= ASSOC; } /* set variables and attributes */ if (wp[builtin_opt.optind] && /* not "typeset -p varname" */ !(!func && pflag && !(fset | fclr))) { int rv = 0, x; struct tbl *f; if (localv && !func) fset |= LOCAL; for (i = builtin_opt.optind; wp[i]; i++) { if (func) { f = findfunc(wp[i], hash(wp[i]), tobool(fset & UCASEV_AL)); if (!f) { /* AT&T ksh does ++rv: bogus */ rv = 1; continue; } if (fset | fclr) { f->flag |= fset; f->flag &= ~fclr; } else { fpFUNCTf(shl_stdout, 0, tobool(f->flag & FKSH), wp[i], f->val.t); shf_putc('\n', shl_stdout); } } else if (!vtypeset(&x, wp[i], fset, fclr, field, base)) { if (x) return (x); bi_errorf(Tf_sD_s, wp[i], Tnot_ident); return (1); } } return (rv); } /* list variables and attributes */ /* no difference at this point.. */ flag = fset | fclr; if (func) { for (l = e->loc; l; l = l->next) { for (p = ktsort(&l->funs); (vp = *p++); ) { if (flag && (vp->flag & flag) == 0) continue; if (thing == '-') fpFUNCTf(shl_stdout, 0, tobool(vp->flag & FKSH), vp->name, vp->val.t); else shf_puts(vp->name, shl_stdout); shf_putc('\n', shl_stdout); } } } else if (wp[builtin_opt.optind]) { for (i = builtin_opt.optind; wp[i]; i++) { vp = isglobal(wp[i], false); c_typeset_vardump(vp, flag, thing, last_lookup_was_array ? 4 : 0, pflag, istset); } } else c_typeset_vardump_recursive(e->loc, flag, thing, pflag, istset); return (0); } static void c_typeset_vardump_recursive(struct block *l, uint32_t flag, int thing, bool pflag, bool istset) { struct tbl **blockvars, *vp; if (l->next) c_typeset_vardump_recursive(l->next, flag, thing, pflag, istset); blockvars = ktsort(&l->vars); while ((vp = *blockvars++)) c_typeset_vardump(vp, flag, thing, 0, pflag, istset); /*XXX doesn’t this leak? */ } static void c_typeset_vardump(struct tbl *vp, uint32_t flag, int thing, int any_set, bool pflag, bool istset) { struct tbl *tvp; char *s; if (!vp) return; /* * See if the parameter is set (for arrays, if any * element is set). */ for (tvp = vp; tvp; tvp = tvp->u.array) if (tvp->flag & ISSET) { any_set |= 1; break; } /* * Check attributes - note that all array elements * have (should have?) the same attributes, so checking * the first is sufficient. * * Report an unset param only if the user has * explicitly given it some attribute (like export); * otherwise, after "echo $FOO", we would report FOO... */ if (!any_set && !(vp->flag & USERATTRIB)) return; if (flag && (vp->flag & flag) == 0) return; if (!(vp->flag & ARRAY)) /* optimise later conditionals */ any_set = 0; do { /* * Ignore array elements that aren't set unless there * are no set elements, in which case the first is * reported on */ if (any_set && !(vp->flag & ISSET)) continue; /* no arguments */ if (!thing && !flag) { if (any_set == 1) { shprintf(Tf_s_s_sN, Tset, "-A", vp->name); any_set = 2; } /* * AT&T ksh prints things like export, integer, * leftadj, zerofill, etc., but POSIX says must * be suitable for re-entry... */ shprintf(Tf_s_s, Ttypeset, ""); if (((vp->flag & (ARRAY | ASSOC)) == ASSOC)) shprintf(Tf__c_, 'n'); if ((vp->flag & INTEGER)) shprintf(Tf__c_, 'i'); if ((vp->flag & EXPORT)) shprintf(Tf__c_, 'x'); if ((vp->flag & RDONLY)) shprintf(Tf__c_, 'r'); if ((vp->flag & TRACE)) shprintf(Tf__c_, 't'); if ((vp->flag & LJUST)) shprintf("-L%d ", vp->u2.field); if ((vp->flag & RJUST)) shprintf("-R%d ", vp->u2.field); if ((vp->flag & ZEROFIL)) shprintf(Tf__c_, 'Z'); if ((vp->flag & LCASEV)) shprintf(Tf__c_, 'l'); if ((vp->flag & UCASEV_AL)) shprintf(Tf__c_, 'u'); if ((vp->flag & INT_U)) shprintf(Tf__c_, 'U'); } else if (pflag) { shprintf(Tf_s_s, istset ? Ttypeset : (flag & EXPORT) ? Texport : Treadonly, ""); } if (any_set) shprintf("%s[%lu]", vp->name, arrayindex(vp)); else shf_puts(vp->name, shl_stdout); if ((!thing && !flag && pflag) || (thing == '-' && (vp->flag & ISSET))) { s = str_val(vp); shf_putc('=', shl_stdout); /* AT&T ksh can't have justified integers... */ if ((vp->flag & (INTEGER | LJUST | RJUST)) == INTEGER) shf_puts(s, shl_stdout); else print_value_quoted(shl_stdout, s); } shf_putc('\n', shl_stdout); /* * Only report first 'element' of an array with * no set elements. */ if (!any_set) return; } while (!(any_set & 4) && (vp = vp->u.array)); }