mirror of
git://git.code.sf.net/p/zsh/code
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a73c705b0c
This served as a workaround for ancient compilers where casts to unsigned char were broken.
692 lines
16 KiB
C
692 lines
16 KiB
C
/*
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* stat.c - stat builtin interface to system call
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*
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* This file is part of zsh, the Z shell.
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*
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* Copyright (c) 1996-1997 Peter Stephenson
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and to distribute modified versions of this software for any
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* purpose, provided that the above copyright notice and the following
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* two paragraphs appear in all copies of this software.
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*
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* In no event shall Peter Stephenson or the Zsh Development Group be liable
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* to any party for direct, indirect, special, incidental, or consequential
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* damages arising out of the use of this software and its documentation,
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* even if Peter Stephenson and the Zsh Development Group have been advised of
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* the possibility of such damage.
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*
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* Peter Stephenson and the Zsh Development Group specifically disclaim any
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose. The software
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* provided hereunder is on an "as is" basis, and Peter Stephenson and the
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* Zsh Development Group have no obligation to provide maintenance,
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* support, updates, enhancements, or modifications.
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*
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*/
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#include "stat.mdh"
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#include "stat.pro"
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enum statnum { ST_DEV, ST_INO, ST_MODE, ST_NLINK, ST_UID, ST_GID,
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ST_RDEV, ST_SIZE, ST_ATIM, ST_MTIM, ST_CTIM,
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ST_BLKSIZE, ST_BLOCKS, ST_READLINK, ST_COUNT };
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enum statflags { STF_NAME = 1, STF_FILE = 2, STF_STRING = 4, STF_RAW = 8,
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STF_PICK = 16, STF_ARRAY = 32, STF_GMT = 64,
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STF_HASH = 128, STF_OCTAL = 256 };
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static char *statelts[] = { "device", "inode", "mode", "nlink",
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"uid", "gid", "rdev", "size", "atime",
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"mtime", "ctime", "blksize", "blocks",
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"link", NULL };
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#define HNAMEKEY "name"
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/**/
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static void
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statmodeprint(mode_t mode, char *outbuf, int flags)
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{
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if (flags & STF_RAW) {
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sprintf(outbuf, (flags & STF_OCTAL) ? "0%lo" : "%lu",
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(unsigned long)mode);
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if (flags & STF_STRING)
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strcat(outbuf, " (");
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}
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if (flags & STF_STRING) {
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static const char *modes = "?rwxrwxrwx";
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#ifdef __CYGWIN__
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static mode_t mflags[9] = { 0 };
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#else
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static const mode_t mflags[9] = {
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S_IRUSR, S_IWUSR, S_IXUSR,
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S_IRGRP, S_IWGRP, S_IXGRP,
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S_IROTH, S_IWOTH, S_IXOTH
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};
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#endif
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const mode_t *mfp = mflags;
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char pm[11];
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int i;
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#ifdef __CYGWIN__
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if (mflags[0] == 0) {
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mflags[0] = S_IRUSR;
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mflags[1] = S_IWUSR;
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mflags[2] = S_IXUSR;
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mflags[3] = S_IRGRP;
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mflags[4] = S_IWGRP;
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mflags[5] = S_IXGRP;
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mflags[6] = S_IROTH;
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mflags[7] = S_IWOTH;
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mflags[8] = S_IXOTH;
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}
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#endif
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if (S_ISBLK(mode))
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*pm = 'b';
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else if (S_ISCHR(mode))
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*pm = 'c';
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else if (S_ISDIR(mode))
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*pm = 'd';
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else if (S_ISDOOR(mode))
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*pm = 'D';
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else if (S_ISFIFO(mode))
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*pm = 'p';
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else if (S_ISLNK(mode))
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*pm = 'l';
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else if (S_ISMPC(mode))
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*pm = 'm';
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else if (S_ISNWK(mode))
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*pm = 'n';
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else if (S_ISOFD(mode))
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*pm = 'M';
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else if (S_ISOFL(mode))
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*pm = 'M';
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else if (S_ISREG(mode))
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*pm = '-';
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else if (S_ISSOCK(mode))
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*pm = 's';
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else
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*pm = '?';
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for (i = 1; i <= 9; i++)
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pm[i] = (mode & *mfp++) ? modes[i] : '-';
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pm[10] = '\0';
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if (mode & S_ISUID)
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pm[3] = (mode & S_IXUSR) ? 's' : 'S';
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if (mode & S_ISGID)
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pm[6] = (mode & S_IXGRP) ? 's' : 'S';
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if (mode & S_ISVTX)
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pm[9] = (mode & S_IXOTH) ? 't' : 'T';
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pm[10] = 0;
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strcat(outbuf, pm);
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if (flags & STF_RAW)
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strcat(outbuf, ")");
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}
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}
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/**/
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static void
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statuidprint(uid_t uid, char *outbuf, int flags)
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{
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if (flags & STF_RAW) {
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sprintf(outbuf, "%lu", (unsigned long)uid);
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if (flags & STF_STRING)
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strcat(outbuf, " (");
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}
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if (flags & STF_STRING) {
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#ifdef HAVE_GETPWUID
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struct passwd *pwd;
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pwd = getpwuid(uid);
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if (pwd)
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strcat(outbuf, pwd->pw_name);
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else
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#endif /* !HAVE_GETPWUID */
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{
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char *optr;
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for (optr = outbuf; *optr; optr++)
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;
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sprintf(optr, "%lu", (unsigned long)uid);
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}
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if (flags & STF_RAW)
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strcat(outbuf, ")");
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}
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}
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/**/
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static void
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statgidprint(gid_t gid, char *outbuf, int flags)
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{
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if (flags & STF_RAW) {
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sprintf(outbuf, "%lu", (unsigned long)gid);
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if (flags & STF_STRING)
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strcat(outbuf, " (");
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}
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if (flags & STF_STRING) {
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#ifdef USE_GETGRGID
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struct group *gr;
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gr = getgrgid(gid);
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if (gr)
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strcat(outbuf, gr->gr_name);
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else
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#endif /* !USE_GETGRGID */
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{
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char *optr;
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for (optr = outbuf; *optr; optr++)
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;
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sprintf(optr, "%lu", (unsigned long)gid);
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}
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if (flags & STF_RAW)
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strcat(outbuf, ")");
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}
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}
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static char *timefmt;
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/**/
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static void
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stattimeprint(time_t tim, long nsecs, char *outbuf, int flags)
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{
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if (flags & STF_RAW) {
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sprintf(outbuf, "%ld", (unsigned long)tim);
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if (flags & STF_STRING)
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strcat(outbuf, " (");
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}
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if (flags & STF_STRING) {
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char *oend = outbuf + strlen(outbuf);
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/* Where the heck does "40" come from? */
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ztrftime(oend, 40, timefmt, (flags & STF_GMT) ? gmtime(&tim) :
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localtime(&tim), nsecs);
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if (flags & STF_RAW)
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strcat(oend, ")");
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}
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}
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/**/
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static void
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statulprint(unsigned long num, char *outbuf)
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{
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sprintf(outbuf, "%lu", num);
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}
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/**/
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static void
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statlinkprint(struct stat *sbuf, char *outbuf, char *fname)
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{
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int num;
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/* fname is NULL if we are looking at an fd */
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if (fname && S_ISLNK(sbuf->st_mode) &&
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(num = readlink(fname, outbuf, PATH_MAX)) > 0) {
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/* readlink doesn't terminate the buffer itself */
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outbuf[num] = '\0';
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}
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}
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/**/
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static void
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statprint(struct stat *sbuf, char *outbuf, char *fname, int iwhich, int flags)
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{
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char *optr = outbuf;
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if (flags & STF_NAME) {
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sprintf(outbuf, (flags & (STF_PICK|STF_ARRAY)) ?
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"%s " : "%-8s", statelts[iwhich]);
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optr += strlen(outbuf);
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}
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*optr = '\0';
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/* cast values to unsigned long as safest bet */
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switch (iwhich) {
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case ST_DEV:
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statulprint((unsigned long)sbuf->st_dev, optr);
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break;
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case ST_INO:
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#ifdef INO_T_IS_64_BIT
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convbase(optr, sbuf->st_ino, 0);
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#else
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DPUTS(sizeof(sbuf->st_ino) > sizeof(unsigned long),
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"Shell compiled with wrong ino_t size");
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statulprint((unsigned long)sbuf->st_ino, optr);
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#endif
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break;
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case ST_MODE:
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statmodeprint(sbuf->st_mode, optr, flags);
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break;
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case ST_NLINK:
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statulprint((unsigned long)sbuf->st_nlink, optr);
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break;
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case ST_UID:
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statuidprint(sbuf->st_uid, optr, flags);
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break;
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case ST_GID:
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statgidprint(sbuf->st_gid, optr, flags);
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break;
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case ST_RDEV:
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statulprint((unsigned long)sbuf->st_rdev, optr);
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break;
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case ST_SIZE:
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#ifdef OFF_T_IS_64_BIT
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convbase(optr, sbuf->st_size, 0);
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#else
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DPUTS(sizeof(sbuf->st_size) > sizeof(unsigned long),
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"Shell compiled with wrong off_t size");
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statulprint((unsigned long)sbuf->st_size, optr);
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#endif
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break;
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case ST_ATIM:
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#ifdef GET_ST_ATIME_NSEC
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stattimeprint(sbuf->st_atime, GET_ST_ATIME_NSEC(*sbuf), optr, flags);
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#else
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stattimeprint(sbuf->st_atime, 0L, optr, flags);
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#endif
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break;
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case ST_MTIM:
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#ifdef GET_ST_MTIME_NSEC
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stattimeprint(sbuf->st_mtime, GET_ST_MTIME_NSEC(*sbuf), optr, flags);
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#else
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stattimeprint(sbuf->st_mtime, 0L, optr, flags);
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#endif
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break;
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case ST_CTIM:
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#ifdef GET_ST_CTIME_NSEC
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stattimeprint(sbuf->st_ctime, GET_ST_CTIME_NSEC(*sbuf), optr, flags);
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#else
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stattimeprint(sbuf->st_ctime, 0L, optr, flags);
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#endif
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break;
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case ST_BLKSIZE:
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statulprint((unsigned long)sbuf->st_blksize, optr);
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break;
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case ST_BLOCKS:
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statulprint((unsigned long)sbuf->st_blocks, optr);
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break;
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case ST_READLINK:
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statlinkprint(sbuf, optr, fname);
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break;
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case ST_COUNT: /* keep some compilers happy */
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break;
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}
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}
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/*
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*
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* Options:
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* -f fd: stat fd instead of file
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* -g: use GMT rather than local time for time strings (forces -s on).
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* -n: always print file name of file being statted
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* -N: never print file name
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* -l: list stat types
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* -L: do lstat (else links are implicitly dereferenced by stat)
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* -t: always print name of stat type
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* -T: never print name of stat type
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* -r: print raw alongside string data
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* -s: string, print mode, times, uid, gid as appropriate strings:
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* harmless but unnecessary when combined with -r.
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* -A array: assign results to given array, one stat result per element.
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* File names and type names are only added if explicitly requested:
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* file names are returned as a separate array element, type names as
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* prefix to element. Note the formatting deliberately contains
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* fewer frills when -A is used.
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* -H hash: as for -A array, but returns a hash with the keys being those
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* from stat -l
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* -F fmt: specify a $TIME-like format for printing times; the default
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* is the (CTIME-like) "%a %b %e %k:%M:%S %Z %Y". This option implies
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* -s as it is not useful for numerical times.
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*
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* +type selects just element type of stat buffer (-l gives list):
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* type can be shortened to unambiguous string. only one type is
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* allowed. The extra type, +link, reads the target of a symbolic
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* link; it is empty if the stat was not an lstat or if
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* a file descriptor was stat'd, if the stat'd file is
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* not a symbolic link, or if symbolic links are not
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* supported. If +link is explicitly requested, the -L (lstat)
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* option is set automatically.
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*/
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/**/
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static int
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bin_stat(char *name, char **args, Options ops, UNUSED(int func))
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{
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char **aptr, *arrnam = NULL, **array = NULL, **arrptr = NULL;
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char *hashnam = NULL, **hash = NULL, **hashptr = NULL;
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int len, iwhich = -1, ret = 0, flags = 0, arrsize = 0, fd = 0;
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struct stat statbuf;
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int found = 0, nargs;
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timefmt = "%a %b %e %k:%M:%S %Z %Y";
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for (; *args && (**args == '+' || **args == '-'); args++) {
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char *arg = *args+1;
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if (!*arg || *arg == '-' || *arg == '+') {
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args++;
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break;
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}
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if (**args == '+') {
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if (found)
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break;
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len = strlen(arg);
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for (aptr = statelts; *aptr; aptr++)
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if (!strncmp(*aptr, arg, len)) {
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found++;
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iwhich = aptr - statelts;
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}
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if (found > 1) {
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zwarnnam(name, "%s: ambiguous stat element", arg);
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return 1;
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} else if (found == 0) {
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zwarnnam(name, "%s: no such stat element", arg);
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return 1;
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}
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/* if name of link requested, turn on lstat */
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if (iwhich == ST_READLINK)
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ops->ind['L'] = 1;
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flags |= STF_PICK;
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} else {
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for (; *arg; arg++) {
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if (strchr("glLnNorstT", *arg))
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ops->ind[(unsigned char) *arg] = 1;
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else if (*arg == 'A') {
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if (arg[1]) {
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arrnam = arg+1;
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} else if (!(arrnam = *++args)) {
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zwarnnam(name, "missing parameter name");
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return 1;
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}
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flags |= STF_ARRAY;
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break;
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} else if (*arg == 'H') {
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if (arg[1]) {
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hashnam = arg+1;
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} else if (!(hashnam = *++args)) {
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zwarnnam(name, "missing parameter name");
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return 1;
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}
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flags |= STF_HASH;
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break;
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} else if (*arg == 'f') {
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char *sfd;
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ops->ind['f'] = 1;
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if (arg[1]) {
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sfd = arg+1;
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} else if (!(sfd = *++args)) {
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zwarnnam(name, "missing file descriptor");
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return 1;
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}
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fd = zstrtol(sfd, &sfd, 10);
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if (*sfd) {
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zwarnnam(name, "bad file descriptor");
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return 1;
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}
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break;
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} else if (*arg == 'F') {
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if (arg[1]) {
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timefmt = arg+1;
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} else if (!(timefmt = *++args)) {
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zwarnnam(name, "missing time format");
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return 1;
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}
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/* force string format in order to use time format */
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ops->ind['s'] = 1;
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break;
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} else {
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zwarnnam(name, "bad option: -%c", *arg);
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return 1;
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}
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}
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}
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}
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if ((flags & STF_ARRAY) && (flags & STF_HASH)) {
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/* We don't implement setting multiple variables at once */
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zwarnnam(name, "both array and hash requested");
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return 1;
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/* Alternate method would be to make -H blank arrnam etc etc *
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* and so get 'silent loss' of earlier choice, which would *
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* be similar to stat -A foo -A bar filename */
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}
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if (OPT_ISSET(ops,'l')) {
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/* list types and return: can also list to array */
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if (arrnam) {
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arrptr = array = (char **)zalloc((ST_COUNT+1)*sizeof(char *));
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array[ST_COUNT] = NULL;
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}
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for (aptr = statelts; *aptr; aptr++) {
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if (arrnam) {
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*arrptr++ = ztrdup(*aptr);
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} else {
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printf("%s", *aptr);
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if (aptr[1])
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putchar(' ');
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}
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}
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if (arrnam) {
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setaparam(arrnam, array);
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if (errflag)
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return 1;
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} else
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putchar('\n');
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return 0;
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}
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if (!*args && !OPT_ISSET(ops,'f')) {
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zwarnnam(name, "no files given");
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return 1;
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} else if (*args && OPT_ISSET(ops,'f')) {
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zwarnnam(name, "no files allowed with -f");
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return 1;
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}
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nargs = 0;
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if (OPT_ISSET(ops,'f'))
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nargs = 1;
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else
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for (aptr = args; *aptr; aptr++) {
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unmetafy(*aptr, NULL);
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nargs++;
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}
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if (OPT_ISSET(ops,'g')) {
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flags |= STF_GMT;
|
|
ops->ind['s'] = 1;
|
|
}
|
|
if (OPT_ISSET(ops,'s') || OPT_ISSET(ops,'r'))
|
|
flags |= STF_STRING;
|
|
if (OPT_ISSET(ops,'r') || !OPT_ISSET(ops,'s'))
|
|
flags |= STF_RAW;
|
|
if (OPT_ISSET(ops,'n'))
|
|
flags |= STF_FILE;
|
|
if (OPT_ISSET(ops,'o'))
|
|
flags |= STF_OCTAL;
|
|
if (OPT_ISSET(ops,'t'))
|
|
flags |= STF_NAME;
|
|
|
|
if (!(arrnam || hashnam)) {
|
|
if (nargs > 1)
|
|
flags |= STF_FILE;
|
|
if (!(flags & STF_PICK))
|
|
flags |= STF_NAME;
|
|
}
|
|
|
|
if (OPT_ISSET(ops,'N') || OPT_ISSET(ops,'f'))
|
|
flags &= ~STF_FILE;
|
|
if (OPT_ISSET(ops,'T') || OPT_ISSET(ops,'H'))
|
|
flags &= ~STF_NAME;
|
|
|
|
if (hashnam) {
|
|
if (nargs > 1) {
|
|
zwarnnam(name, "only one file allowed with -H");
|
|
return 1;
|
|
}
|
|
arrsize = (flags & STF_PICK) ? 1 : ST_COUNT;
|
|
if (flags & STF_FILE)
|
|
arrsize++;
|
|
hashptr = hash = (char **)zshcalloc((arrsize+1)*2*sizeof(char *));
|
|
}
|
|
|
|
if (arrnam) {
|
|
arrsize = (flags & STF_PICK) ? 1 : ST_COUNT;
|
|
if (flags & STF_FILE)
|
|
arrsize++;
|
|
arrsize *= nargs;
|
|
arrptr = array = (char **)zshcalloc((arrsize+1)*sizeof(char *));
|
|
}
|
|
|
|
for (; OPT_ISSET(ops,'f') || *args; args++) {
|
|
char outbuf[PATH_MAX + 9]; /* "link " + link name + NULL */
|
|
int rval = OPT_ISSET(ops,'f') ? fstat(fd, &statbuf) :
|
|
OPT_ISSET(ops,'L') ? lstat(*args, &statbuf) :
|
|
stat(*args, &statbuf);
|
|
if (rval) {
|
|
if (OPT_ISSET(ops,'f'))
|
|
sprintf(outbuf, "%d", fd);
|
|
zwarnnam(name, "%s: %e", OPT_ISSET(ops,'f') ? outbuf : *args,
|
|
errno);
|
|
ret = 1;
|
|
if (OPT_ISSET(ops,'f') || arrnam)
|
|
break;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
if (flags & STF_FILE) {
|
|
if (arrnam)
|
|
*arrptr++ = ztrdup_metafy(*args);
|
|
else if (hashnam) {
|
|
*hashptr++ = ztrdup(HNAMEKEY);
|
|
*hashptr++ = ztrdup_metafy(*args);
|
|
} else
|
|
printf("%s%s", *args, (flags & STF_PICK) ? " " : ":\n");
|
|
}
|
|
if (iwhich > -1) {
|
|
statprint(&statbuf, outbuf, *args, iwhich, flags);
|
|
if (arrnam)
|
|
*arrptr++ = metafy(outbuf, -1, META_DUP);
|
|
else if (hashnam) {
|
|
/* STF_NAME explicitly turned off for ops.ind['H'] above */
|
|
*hashptr++ = ztrdup(statelts[iwhich]);
|
|
*hashptr++ = metafy(outbuf, -1, META_DUP);
|
|
} else
|
|
printf("%s\n", outbuf);
|
|
} else {
|
|
int i;
|
|
for (i = 0; i < ST_COUNT; i++) {
|
|
statprint(&statbuf, outbuf, *args, i, flags);
|
|
if (arrnam)
|
|
*arrptr++= metafy(outbuf, -1, META_DUP);
|
|
else if (hashnam) {
|
|
/* STF_NAME explicitly turned off for ops.ind['H'] above */
|
|
*hashptr++ = ztrdup(statelts[i]);
|
|
*hashptr++ = metafy(outbuf, -1, META_DUP);
|
|
} else
|
|
printf("%s\n", outbuf);
|
|
}
|
|
}
|
|
if (OPT_ISSET(ops,'f'))
|
|
break;
|
|
|
|
if (!arrnam && !hashnam && args[1] && !(flags & STF_PICK))
|
|
putchar('\n');
|
|
}
|
|
|
|
if (arrnam) {
|
|
if (ret)
|
|
freearray(array);
|
|
else {
|
|
setaparam(arrnam, array);
|
|
if (errflag)
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (hashnam) {
|
|
if (ret)
|
|
freearray(hash);
|
|
else {
|
|
sethparam(hashnam, hash);
|
|
if (errflag)
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct builtin bintab[] = {
|
|
BUILTIN("stat", 0, bin_stat, 0, -1, 0, NULL, NULL),
|
|
BUILTIN("zstat", 0, bin_stat, 0, -1, 0, NULL, NULL),
|
|
};
|
|
|
|
static struct features module_features = {
|
|
bintab, sizeof(bintab)/sizeof(*bintab),
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
0
|
|
};
|
|
|
|
/**/
|
|
int
|
|
setup_(UNUSED(Module m))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**/
|
|
int
|
|
features_(Module m, char ***features)
|
|
{
|
|
*features = featuresarray(m, &module_features);
|
|
return 0;
|
|
}
|
|
|
|
/**/
|
|
int
|
|
enables_(Module m, int **enables)
|
|
{
|
|
return handlefeatures(m, &module_features, enables);
|
|
}
|
|
|
|
/**/
|
|
int
|
|
boot_(UNUSED(Module m))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**/
|
|
int
|
|
cleanup_(Module m)
|
|
{
|
|
return setfeatureenables(m, &module_features, NULL);
|
|
}
|
|
|
|
/**/
|
|
int
|
|
finish_(UNUSED(Module m))
|
|
{
|
|
return 0;
|
|
}
|