diff options
Diffstat (limited to 'contrib/tcsh/sh.exp.c')
-rw-r--r-- | contrib/tcsh/sh.exp.c | 1057 |
1 files changed, 1057 insertions, 0 deletions
diff --git a/contrib/tcsh/sh.exp.c b/contrib/tcsh/sh.exp.c new file mode 100644 index 0000000..abb1764 --- /dev/null +++ b/contrib/tcsh/sh.exp.c @@ -0,0 +1,1057 @@ +/* $Header: /p/tcsh/cvsroot/tcsh/sh.exp.c,v 3.58 2011/12/25 15:21:50 christos Exp $ */ +/* + * sh.exp.c: Expression evaluations + */ +/*- + * Copyright (c) 1980, 1991 The Regents of the University of California. + * All rights reserved. + * + * 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. 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 "sh.h" + +RCSID("$tcsh: sh.exp.c,v 3.58 2011/12/25 15:21:50 christos Exp $") + +#include "tw.h" + +/* + * C shell + */ + +#define TEXP_IGNORE 1 /* in ignore, it means to ignore value, just parse */ +#define TEXP_NOGLOB 2 /* in ignore, it means not to globone */ + +#define ADDOP 1 +#define MULOP 2 +#define EQOP 4 +#define RELOP 8 +#define RESTOP 16 +#define ANYOP 31 + +#define EQEQ 1 +#define GTR 2 +#define LSS 4 +#define NOTEQ 6 +#define EQMATCH 7 +#define NOTEQMATCH 8 + +static int sh_access (const Char *, int); +static tcsh_number_t exp1 (Char ***, int); +static tcsh_number_t exp2x (Char ***, int); +static tcsh_number_t exp2a (Char ***, int); +static tcsh_number_t exp2b (Char ***, int); +static tcsh_number_t exp2c (Char ***, int); +static Char *exp3 (Char ***, int); +static Char *exp3a (Char ***, int); +static Char *exp4 (Char ***, int); +static Char *exp5 (Char ***, int); +static Char *exp6 (Char ***, int); +static void evalav (Char **); +static int isa (Char *, int); +static tcsh_number_t egetn (const Char *); + +#ifdef EDEBUG +static void etracc (const char *, const Char *, Char ***); +static void etraci (const char *, tcsh_number_t, Char ***); +#else /* !EDEBUG */ +#define etracc(A, B, C) ((void)0) +#define etraci(A, B, C) ((void)0) +#endif /* !EDEBUG */ + +/* + * shell access function according to POSIX and non POSIX + * From Beto Appleton (beto@aixwiz.aix.ibm.com) + */ +static int +sh_access(const Char *fname, int mode) +{ +#if defined(POSIX) && !defined(USE_ACCESS) + struct stat statb; +#endif /* POSIX */ + char *name = short2str(fname); + + if (*name == '\0') + return 1; + +#if !defined(POSIX) || defined(USE_ACCESS) + return access(name, mode); +#else /* POSIX */ + + /* + * POSIX 1003.2-d11.2 + * -r file True if file exists and is readable. + * -w file True if file exists and is writable. + * True shall indicate only that the write flag is on. + * The file shall not be writable on a read-only file + * system even if this test indicates true. + * -x file True if file exists and is executable. + * True shall indicate only that the execute flag is on. + * If file is a directory, true indicates that the file + * can be searched. + */ + if (mode != W_OK && mode != X_OK) + return access(name, mode); + + if (stat(name, &statb) == -1) + return 1; + + if (access(name, mode) == 0) { +#ifdef S_ISDIR + if (S_ISDIR(statb.st_mode) && mode == X_OK) + return 0; +#endif /* S_ISDIR */ + + /* root needs permission for someone */ + switch (mode) { + case W_OK: + mode = S_IWUSR | S_IWGRP | S_IWOTH; + break; + case X_OK: + mode = S_IXUSR | S_IXGRP | S_IXOTH; + break; + default: + abort(); + break; + } + + } + + else if (euid == statb.st_uid) + mode <<= 6; + + else if (egid == statb.st_gid) + mode <<= 3; + +# ifdef NGROUPS_MAX + else { + /* you can be in several groups */ + long n; + GETGROUPS_T *groups; + + /* + * Try these things to find a positive maximum groups value: + * 1) sysconf(_SC_NGROUPS_MAX) + * 2) NGROUPS_MAX + * 3) getgroups(0, unused) + * Then allocate and scan the groups array if one of these worked. + */ +# if defined (HAVE_SYSCONF) && defined (_SC_NGROUPS_MAX) + if ((n = sysconf(_SC_NGROUPS_MAX)) == -1) +# endif /* _SC_NGROUPS_MAX */ + n = NGROUPS_MAX; + if (n <= 0) + n = getgroups(0, (GETGROUPS_T *) NULL); + + if (n > 0) { + groups = xmalloc(n * sizeof(*groups)); + n = getgroups((int) n, groups); + while (--n >= 0) + if (groups[n] == statb.st_gid) { + mode <<= 3; + break; + } + } + } +# endif /* NGROUPS_MAX */ + + if (statb.st_mode & mode) + return 0; + else + return 1; +#endif /* !POSIX */ +} + +tcsh_number_t +expr(Char ***vp) +{ + return (exp0(vp, 0)); +} + +tcsh_number_t +exp0(Char ***vp, int ignore) +{ + tcsh_number_t p1 = exp1(vp, ignore); + + etraci("exp0 p1", p1, vp); + while (**vp && eq(**vp, STRor2)) { + int p2; + + (*vp)++; + + p2 = compat_expr ? + exp0(vp, (ignore & TEXP_IGNORE) || p1) : + exp1(vp, (ignore & TEXP_IGNORE) || p1); + if (compat_expr || !(ignore & TEXP_IGNORE)) + p1 = (p1 || p2); + etraci("exp0 p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static tcsh_number_t +exp1(Char ***vp, int ignore) +{ + tcsh_number_t p1 = exp2x(vp, ignore); + + etraci("exp1 p1", p1, vp); + while (**vp && eq(**vp, STRand2)) { + tcsh_number_t p2; + + (*vp)++; + p2 = compat_expr ? + exp1(vp, (ignore & TEXP_IGNORE) || !p1) : + exp2x(vp, (ignore & TEXP_IGNORE) || !p1); + + etraci("exp1 p2", p2, vp); + if (compat_expr || !(ignore & TEXP_IGNORE)) + p1 = (p1 && p2); + etraci("exp1 p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static tcsh_number_t +exp2x(Char ***vp, int ignore) +{ + tcsh_number_t p1 = exp2a(vp, ignore); + + etraci("exp2x p1", p1, vp); + while (**vp && eq(**vp, STRor)) { + tcsh_number_t p2; + + (*vp)++; + p2 = compat_expr ? + exp2x(vp, ignore) : + exp2a(vp, ignore); + etraci("exp2x p2", p2, vp); + if (compat_expr || !(ignore & TEXP_IGNORE)) + p1 = (p1 | p2); + etraci("exp2x p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static tcsh_number_t +exp2a(Char ***vp, int ignore) +{ + tcsh_number_t p1 = exp2b(vp, ignore); + + etraci("exp2a p1", p1, vp); + while (**vp && eq(**vp, STRcaret)) { + tcsh_number_t p2; + + (*vp)++; + p2 = compat_expr ? + exp2a(vp, ignore) : + exp2b(vp, ignore); + etraci("exp2a p2", p2, vp); + if (compat_expr || !(ignore & TEXP_IGNORE)) + p1 = (p1 ^ p2); + etraci("exp2a p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static tcsh_number_t +exp2b(Char ***vp, int ignore) +{ + tcsh_number_t p1 = exp2c(vp, ignore); + + etraci("exp2b p1", p1, vp); + while (**vp && eq(**vp, STRand)) { + tcsh_number_t p2; + + (*vp)++; + p2 = compat_expr ? + exp2b(vp, ignore) : + exp2c(vp, ignore); + etraci("exp2b p2", p2, vp); + if (compat_expr || !(ignore & TEXP_IGNORE)) + p1 = (p1 & p2); + etraci("exp2b p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static tcsh_number_t +exp2c(Char ***vp, int ignore) +{ + Char *p1 = exp3(vp, ignore); + Char *p2; + tcsh_number_t i; + + cleanup_push(p1, xfree); + etracc("exp2c p1", p1, vp); + if ((i = isa(**vp, EQOP)) != 0) { + (*vp)++; + if (i == EQMATCH || i == NOTEQMATCH) + ignore |= TEXP_NOGLOB; + p2 = exp3(vp, ignore); + cleanup_push(p2, xfree); + etracc("exp2c p2", p2, vp); + if (!(ignore & TEXP_IGNORE)) + switch (i) { + + case EQEQ: + i = eq(p1, p2); + break; + + case NOTEQ: + i = !eq(p1, p2); + break; + + case EQMATCH: + i = Gmatch(p1, p2); + break; + + case NOTEQMATCH: + i = !Gmatch(p1, p2); + break; + } + cleanup_until(p1); + return (i); + } + i = egetn(p1); + cleanup_until(p1); + return (i); +} + +static Char * +exp3(Char ***vp, int ignore) +{ + Char *p1, *p2; + tcsh_number_t i; + + p1 = exp3a(vp, ignore); + etracc("exp3 p1", p1, vp); + while ((i = isa(**vp, RELOP)) != 0) { + (*vp)++; + if (**vp && eq(**vp, STRequal)) + i |= 1, (*vp)++; + cleanup_push(p1, xfree); + p2 = compat_expr ? + exp3(vp, ignore) : + exp3a(vp, ignore); + cleanup_push(p2, xfree); + etracc("exp3 p2", p2, vp); + if (!(ignore & TEXP_IGNORE)) + switch (i) { + + case GTR: + i = egetn(p1) > egetn(p2); + break; + + case GTR | 1: + i = egetn(p1) >= egetn(p2); + break; + + case LSS: + i = egetn(p1) < egetn(p2); + break; + + case LSS | 1: + i = egetn(p1) <= egetn(p2); + break; + } + cleanup_until(p1); + p1 = putn(i); + etracc("exp3 p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static Char * +exp3a(Char ***vp, int ignore) +{ + Char *p1, *p2; + const Char *op; + tcsh_number_t i; + + p1 = exp4(vp, ignore); + etracc("exp3a p1", p1, vp); + op = **vp; + if (op && any("<>", op[0]) && op[0] == op[1]) { + (*vp)++; + cleanup_push(p1, xfree); + p2 = compat_expr ? + exp3a(vp, ignore) : + exp4(vp, ignore); + cleanup_push(p2, xfree); + etracc("exp3a p2", p2, vp); + if (op[0] == '<') + i = egetn(p1) << egetn(p2); + else + i = egetn(p1) >> egetn(p2); + cleanup_until(p1); + p1 = putn(i); + etracc("exp3a p1", p1, vp); + } + return (p1); +} + +static Char * +exp4(Char ***vp, int ignore) +{ + Char *p1, *p2; + tcsh_number_t i = 0; + + p1 = exp5(vp, ignore); + etracc("exp4 p1", p1, vp); + while (isa(**vp, ADDOP)) { + const Char *op = *(*vp)++; + + cleanup_push(p1, xfree); + p2 = compat_expr ? + exp4(vp, ignore) : + exp5(vp, ignore); + cleanup_push(p2, xfree); + etracc("exp4 p2", p2, vp); + if (!(ignore & TEXP_IGNORE)) + switch (op[0]) { + + case '+': + i = egetn(p1) + egetn(p2); + break; + + case '-': + i = egetn(p1) - egetn(p2); + break; + } + cleanup_until(p1); + p1 = putn(i); + etracc("exp4 p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static Char * +exp5(Char ***vp, int ignore) +{ + Char *p1, *p2; + tcsh_number_t i = 0; + + p1 = exp6(vp, ignore); + etracc("exp5 p1", p1, vp); + + while (isa(**vp, MULOP)) { + const Char *op = *(*vp)++; + if ((ignore & TEXP_NOGLOB) != 0) { + /* + * We are just trying to get the right side of + * a =~ or !~ operator + */ + xfree(p1); + return Strsave(op); + } + + cleanup_push(p1, xfree); + p2 = compat_expr ? + exp5(vp, ignore) : + exp6(vp, ignore); + cleanup_push(p2, xfree); + etracc("exp5 p2", p2, vp); + if (!(ignore & TEXP_IGNORE)) + switch (op[0]) { + + case '*': + i = egetn(p1) * egetn(p2); + break; + + case '/': + i = egetn(p2); + if (i == 0) + stderror(ERR_DIV0); + i = egetn(p1) / i; + break; + + case '%': + i = egetn(p2); + if (i == 0) + stderror(ERR_MOD0); + i = egetn(p1) % i; + break; + } + cleanup_until(p1); + p1 = putn(i); + etracc("exp5 p1", p1, vp); + if (compat_expr) + break; + } + return (p1); +} + +static Char * +exp6(Char ***vp, int ignore) +{ + tcsh_number_t ccode; + tcsh_number_t i = 0; + Char *cp; + + if (**vp == 0) + stderror(ERR_NAME | ERR_EXPRESSION); + if (eq(**vp, STRbang)) { + (*vp)++; + cp = exp6(vp, ignore); + cleanup_push(cp, xfree); + etracc("exp6 ! cp", cp, vp); + i = egetn(cp); + cleanup_until(cp); + return (putn(!i)); + } + if (eq(**vp, STRtilde)) { + (*vp)++; + cp = exp6(vp, ignore); + cleanup_push(cp, xfree); + etracc("exp6 ~ cp", cp, vp); + i = egetn(cp); + cleanup_until(cp); + return (putn(~i)); + } + if (eq(**vp, STRLparen)) { + (*vp)++; + ccode = exp0(vp, ignore); + etraci("exp6 () ccode", ccode, vp); + if (**vp == 0 || ***vp != ')') + stderror(ERR_NAME | ERR_EXPRESSION); + (*vp)++; + return (putn(ccode)); + } + if (eq(**vp, STRLbrace)) { + Char **v; + struct command faket; + Char *fakecom[2]; + + faket.t_dtyp = NODE_COMMAND; + faket.t_dflg = F_BACKQ; + faket.t_dcar = faket.t_dcdr = faket.t_dspr = NULL; + faket.t_dcom = fakecom; + fakecom[0] = STRfakecom; + fakecom[1] = NULL; + (*vp)++; + v = *vp; + for (;;) { + if (!**vp) + stderror(ERR_NAME | ERR_MISSING, '}'); + if (eq(*(*vp)++, STRRbrace)) + break; + } + if (ignore & TEXP_IGNORE) + return (Strsave(STRNULL)); + psavejob(); + cleanup_push(&faket, psavejob_cleanup); /* faket is only a marker */ + if (pfork(&faket, -1) == 0) { + *--(*vp) = 0; + evalav(v); + exitstat(); + } + pwait(); + cleanup_until(&faket); + etraci("exp6 {} status", egetn(varval(STRstatus)), vp); + return (putn(egetn(varval(STRstatus)) == 0)); + } + if (isa(**vp, ANYOP)) + return (Strsave(STRNULL)); + cp = *(*vp)++; +#ifdef convex +# define FILETESTS "erwxfdzoplstSXLbcugkmKR" +#else +# define FILETESTS "erwxfdzoplstSXLbcugkmK" +#endif /* convex */ +#define FILEVALS "ZAMCDIUGNFPL" + if (*cp == '-' && (any(FILETESTS, cp[1]) || any(FILEVALS, cp[1]))) + return(filetest(cp, vp, ignore)); + etracc("exp6 default", cp, vp); + return (ignore & TEXP_NOGLOB ? Strsave(cp) : globone(cp, G_APPEND)); +} + + +/* + * Extended file tests + * From: John Rowe <rowe@excc.exeter.ac.uk> + */ +Char * +filetest(Char *cp, Char ***vp, int ignore) +{ +#ifdef convex + struct cvxstat stb, *st = NULL; +# define TCSH_STAT stat64 +#else +# define TCSH_STAT stat + struct stat stb, *st = NULL; +#endif /* convex */ + +#ifdef S_IFLNK +# ifdef convex + struct cvxstat lstb, *lst = NULL; +# define TCSH_LSTAT lstat64 +# else +# define TCSH_LSTAT lstat + struct stat lstb, *lst = NULL; +# endif /* convex */ + char *filnam; +#endif /* S_IFLNK */ + + tcsh_number_t i = 0; + unsigned pmask = 0xffff; + int altout = 0; + Char *ft = cp, *dp, *ep, *strdev, *strino, *strF, *str, valtest = '\0', + *errval = STR0; + char *string, string0[22 + MB_LEN_MAX + 1]; // space for 64 bit octal + time_t footime; + struct passwd *pw; + struct group *gr; + + while(any(FILETESTS, *++ft)) + continue; + + if (!*ft && *(ft - 1) == 'L') + --ft; + + if (any(FILEVALS, *ft)) { + valtest = *ft++; + /* + * Value tests return '-1' on failure as 0 is + * a legitimate value for many of them. + * 'F' returns ':' for compatibility. + */ + errval = valtest == 'F' ? STRcolon : STRminus1; + + if (valtest == 'P' && *ft >= '0' && *ft <= '7') { + pmask = (char) *ft - '0'; + while ( *++ft >= '0' && *ft <= '7' ) + pmask = 8 * pmask + ((char) *ft - '0'); + } + if (Strcmp(ft, STRcolon) == 0 && any("AMCUGP", valtest)) { + altout = 1; + ++ft; + } + } + + if (*ft || ft == cp + 1) + stderror(ERR_NAME | ERR_FILEINQ); + + /* + * Detect missing file names by checking for operator in the file name + * position. However, if an operator name appears there, we must make + * sure that there's no file by that name (e.g., "/") before announcing + * an error. Even this check isn't quite right, since it doesn't take + * globbing into account. + */ + + if (isa(**vp, ANYOP) && TCSH_STAT(short2str(**vp), &stb)) + stderror(ERR_NAME | ERR_FILENAME); + + dp = *(*vp)++; + if (ignore & TEXP_IGNORE) + return (Strsave(STRNULL)); + ep = globone(dp, G_APPEND); + cleanup_push(ep, xfree); + ft = &cp[1]; + do + switch (*ft) { + + case 'r': + i = !sh_access(ep, R_OK); + break; + + case 'w': + i = !sh_access(ep, W_OK); + break; + + case 'x': + i = !sh_access(ep, X_OK); + break; + + case 'X': /* tcsh extension, name is an executable in the path + * or a tcsh builtin command + */ + i = find_cmd(ep, 0); + break; + + case 't': /* SGI extension, true when file is a tty */ + i = isatty(atoi(short2str(ep))); + break; + + default: + +#ifdef S_IFLNK + if (tolower(*ft) == 'l') { + /* + * avoid convex compiler bug. + */ + if (!lst) { + lst = &lstb; + if (TCSH_LSTAT(short2str(ep), lst) == -1) { + cleanup_until(ep); + return (Strsave(errval)); + } + } + if (*ft == 'L') + st = lst; + } + else +#endif /* S_IFLNK */ + /* + * avoid convex compiler bug. + */ + if (!st) { + st = &stb; + if (TCSH_STAT(short2str(ep), st) == -1) { + cleanup_until(ep); + return (Strsave(errval)); + } + } + + switch (*ft) { + + case 'f': +#ifdef S_ISREG + i = S_ISREG(st->st_mode); +#else /* !S_ISREG */ + i = 0; +#endif /* S_ISREG */ + break; + + case 'd': +#ifdef S_ISDIR + i = S_ISDIR(st->st_mode); +#else /* !S_ISDIR */ + i = 0; +#endif /* S_ISDIR */ + break; + + case 'p': +#ifdef S_ISFIFO + i = S_ISFIFO(st->st_mode); +#else /* !S_ISFIFO */ + i = 0; +#endif /* S_ISFIFO */ + break; + + case 'm' : +#ifdef S_ISOFL + i = S_ISOFL(st->st_dm_mode); +#else /* !S_ISOFL */ + i = 0; +#endif /* S_ISOFL */ + break ; + + case 'K' : +#ifdef S_ISOFL + i = stb.st_dm_key; +#else /* !S_ISOFL */ + i = 0; +#endif /* S_ISOFL */ + break ; + + + case 'l': +#ifdef S_ISLNK + i = S_ISLNK(lst->st_mode); +#else /* !S_ISLNK */ + i = 0; +#endif /* S_ISLNK */ + break; + + case 'S': +# ifdef S_ISSOCK + i = S_ISSOCK(st->st_mode); +# else /* !S_ISSOCK */ + i = 0; +# endif /* S_ISSOCK */ + break; + + case 'b': +#ifdef S_ISBLK + i = S_ISBLK(st->st_mode); +#else /* !S_ISBLK */ + i = 0; +#endif /* S_ISBLK */ + break; + + case 'c': +#ifdef S_ISCHR + i = S_ISCHR(st->st_mode); +#else /* !S_ISCHR */ + i = 0; +#endif /* S_ISCHR */ + break; + + case 'u': + i = (S_ISUID & st->st_mode) != 0; + break; + + case 'g': + i = (S_ISGID & st->st_mode) != 0; + break; + + case 'k': + i = (S_ISVTX & st->st_mode) != 0; + break; + + case 'z': + i = st->st_size == 0; + break; + +#ifdef convex + case 'R': + i = (stb.st_dmonflags & IMIGRATED) == IMIGRATED; + break; +#endif /* convex */ + + case 's': + i = stb.st_size != 0; + break; + + case 'e': + i = 1; + break; + + case 'o': + i = st->st_uid == uid; + break; + + /* + * Value operators are a tcsh extension. + */ + + case 'D': + i = (tcsh_number_t) st->st_dev; + break; + + case 'I': + i = (tcsh_number_t) st->st_ino; + break; + + case 'F': + strdev = putn( (int) st->st_dev); + strino = putn( (int) st->st_ino); + strF = xmalloc((2 + Strlen(strdev) + Strlen(strino)) + * sizeof(Char)); + (void) Strcat(Strcat(Strcpy(strF, strdev), STRcolon), strino); + xfree(strdev); + xfree(strino); + cleanup_until(ep); + return(strF); + + case 'L': + if ( *(ft + 1) ) { + i = 1; + break; + } +#ifdef S_ISLNK + filnam = short2str(ep); + string = areadlink(filnam); + strF = string == NULL ? errval : str2short(string); + xfree(string); + cleanup_until(ep); + return(Strsave(strF)); + +#else /* !S_ISLNK */ + i = 0; + break; +#endif /* S_ISLNK */ + + + case 'N': + i = (tcsh_number_t) st->st_nlink; + break; + + case 'P': + string = string0 + 1; + (void) xsnprintf(string, sizeof(string0) - 1, "%o", + pmask & (unsigned int) + ((S_IRWXU|S_IRWXG|S_IRWXO|S_ISUID|S_ISGID) & st->st_mode)); + if (altout && *string != '0') + *--string = '0'; + cleanup_until(ep); + return(Strsave(str2short(string))); + + case 'U': + if (altout && (pw = xgetpwuid(st->st_uid))) { + cleanup_until(ep); + return(Strsave(str2short(pw->pw_name))); + } + i = (tcsh_number_t) st->st_uid; + break; + + case 'G': + if (altout && (gr = xgetgrgid(st->st_gid))) { + cleanup_until(ep); + return(Strsave(str2short(gr->gr_name))); + } + i = (tcsh_number_t) st->st_gid; + break; + + case 'Z': + i = (tcsh_number_t) st->st_size; + break; + + case 'A': case 'M': case 'C': + footime = *ft == 'A' ? st->st_atime : + *ft == 'M' ? st->st_mtime : st->st_ctime; + if (altout) { + strF = str2short(ctime(&footime)); + if ((str = Strchr(strF, '\n')) != NULL) + *str = (Char) '\0'; + cleanup_until(ep); + return(Strsave(strF)); + } + i = (tcsh_number_t) footime; + break; + + } + } + while (*++ft && i); + etraci("exp6 -? i", i, vp); + cleanup_until(ep); + return (putn(i)); +} + + +static void +evalav(Char **v) +{ + struct wordent paraml1; + struct wordent *hp = ¶ml1; + struct command *t; + struct wordent *wdp = hp; + + setcopy(STRstatus, STR0, VAR_READWRITE); + hp->prev = hp->next = hp; + hp->word = STRNULL; + while (*v) { + struct wordent *new = xcalloc(1, sizeof *wdp); + + new->prev = wdp; + new->next = hp; + wdp->next = new; + wdp = new; + wdp->word = Strsave(*v++); + } + hp->prev = wdp; + cleanup_push(¶ml1, lex_cleanup); + alias(¶ml1); + t = syntax(paraml1.next, ¶ml1, 0); + cleanup_push(t, syntax_cleanup); + if (seterr) + stderror(ERR_OLD); + execute(t, -1, NULL, NULL, TRUE); + cleanup_until(¶ml1); +} + +static int +isa(Char *cp, int what) +{ + if (cp == 0) + return ((what & RESTOP) != 0); + if (*cp == '\0') + return 0; + if (cp[1] == 0) { + if (what & ADDOP && (*cp == '+' || *cp == '-')) + return (1); + if (what & MULOP && (*cp == '*' || *cp == '/' || *cp == '%')) + return (1); + if (what & RESTOP && (*cp == '(' || *cp == ')' || *cp == '!' || + *cp == '~' || *cp == '^' || *cp == '"')) + return (1); + } + else if (cp[2] == 0) { + if (what & RESTOP) { + if (cp[0] == '|' && cp[1] == '&') + return (1); + if (cp[0] == '<' && cp[1] == '<') + return (1); + if (cp[0] == '>' && cp[1] == '>') + return (1); + } + if (what & EQOP) { + if (cp[0] == '=') { + if (cp[1] == '=') + return (EQEQ); + if (cp[1] == '~') + return (EQMATCH); + } + else if (cp[0] == '!') { + if (cp[1] == '=') + return (NOTEQ); + if (cp[1] == '~') + return (NOTEQMATCH); + } + } + } + if (what & RELOP) { + if (*cp == '<') + return (LSS); + if (*cp == '>') + return (GTR); + } + return (0); +} + +static tcsh_number_t +egetn(const Char *cp) +{ + if (*cp && *cp != '-' && !Isdigit(*cp)) + stderror(ERR_NAME | ERR_EXPRESSION); + return (getn(cp)); +} + +/* Phew! */ + +#ifdef EDEBUG +static void +etraci(const char *str, tcsh_number_t i, Char ***vp) +{ +#ifdef HAVE_LONG_LONG + xprintf("%s=%lld\t", str, i); +#else + xprintf("%s=%ld\t", str, i); +#endif + blkpr(*vp); + xputchar('\n'); +} +static void +etracc(const char *str, const Char *cp, Char ***vp) +{ + xprintf("%s=%S\t", str, cp); + blkpr(*vp); + xputchar('\n'); +} +#endif /* EDEBUG */ |