source: trunk/src/kmk/kmkbuiltin/mkdir.c

/*
 * Copyright (c) 1983, 1992, 1993
 *      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.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1983, 1992, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)mkdir.c     8.2 (Berkeley) 1/25/94";
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/bin/mkdir/mkdir.c,v 1.28 2004/04/06 20:06:48 markm Exp $");
#endif

#define FAKES_NO_GETOPT_H /* bird */
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>

#include "err.h"
#include <errno.h>
#include <assert.h>
#ifndef _MSC_VER
# include <libgen.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __HAIKU__
# include <sysexits.h>
#endif
#include <unistd.h>
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif
#include "getopt_r.h"
#ifdef __HAIKU__
# include "haikufakes.h"
#endif
#ifdef _MSC_VER
# include <malloc.h>
# include "mscfakes.h"
#endif
#include "kmkbuiltin.h"


static struct option long_options[] =
{
    { "help",                                           no_argument, 0, 261 },
    { "version",                                        no_argument, 0, 262 },
    { 0, 0,     0, 0 },
};

extern mode_t g_fUMask;

extern void * bsd_setmode(const char *p);
extern mode_t bsd_getmode(const void *bbox, mode_t omode);

static int      build(PKMKBUILTINCTX pCtx, char *, mode_t, int);
static int      usage(PKMKBUILTINCTX pCtx, int fIsErr);


int
kmk_builtin_mkdir(int argc, char **argv, char **envp, PKMKBUILTINCTX pCtx)
{
        struct getopt_state_r gos;
        int ch, exitval, success, pflag, vflag;
        mode_t omode, *set = (mode_t *)NULL;
        char *mode;

        omode = pflag = vflag = 0;
        mode = NULL;

        getopt_initialize_r(&gos, argc, argv, "m:pv", long_options, envp, pCtx);
        while ((ch = getopt_long_r(&gos, NULL)) != -1)
                switch(ch) {
                case 'm':
                        mode = gos.optarg;
                        break;
                case 'p':
                        pflag = 1;
                        break;
                case 'v':
                        vflag = 1;
                        break;
                case 261:
                        usage(pCtx, 0);
                        return 0;
                case 262:
                        return kbuild_version(argv[0]);
                case '?':
                default:
                        return usage(pCtx, 1);
                }

        argc -= gos.optind;
        argv += gos.optind;
        if (argv[0] == NULL)
                return usage(pCtx, 1);

        if (mode == NULL) {
                omode = S_IRWXU | S_IRWXG | S_IRWXO;
        } else {
                if ((set = bsd_setmode(mode)) == NULL)
                        return errx(pCtx, 1, "invalid file mode: %s", mode);
                omode = bsd_getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
                free(set);
        }

        for (exitval = 0; *argv != NULL; ++argv) {
                success = 1;
                if (pflag) {
                        if (build(pCtx, *argv, omode, vflag))
                                success = 0;
                } else if (mkdir(*argv, omode) < 0) {
                        if (errno == ENOTDIR || errno == ENOENT)
                                warn(pCtx, "mkdir: %s", dirname(*argv));
                        else
                                warn(pCtx, "mkdir: %s", *argv);
                        success = 0;
                } else if (vflag)
                        kmk_builtin_ctx_printf(pCtx, 0, "%s\n", *argv);

                if (!success)
                        exitval = 1;
                /*
                 * The mkdir() and umask() calls both honor only the low
                 * nine bits, so if you try to set a mode including the
                 * sticky, setuid, setgid bits you lose them.  Don't do
                 * this unless the user has specifically requested a mode,
                 * as chmod will (obviously) ignore the umask.
                 */
                if (success && mode != NULL && chmod(*argv, omode) == -1) {
                        warn(pCtx, "chmod: %s", *argv);
                        exitval = 1;
                }
        }
        return exitval;
}

#ifdef KMK_BUILTIN_STANDALONE
mode_t g_fUMask;
int main(int argc, char **argv, char **envp)
{
    KMKBUILTINCTX Ctx = { "kmk_mkdir", NULL };
    umask(g_fUMask = umask(0077));
    return kmk_builtin_mkdir(argc, argv, envp, &Ctx);
}
#endif

static int
build(PKMKBUILTINCTX pCtx, char *path, mode_t omode, int vflag)
{
        struct stat sb;
        mode_t numask, oumask;
        int first, last, retval;
        char *p;

        const size_t len = strlen(path);
        p = alloca(len + 1);
        path = memcpy(p, path, len + 1);

#if defined(_MSC_VER) || defined(__EMX__)
        /* correct slashes. */
        p = strchr(path, '\\');
        while (p) {
                *p++ = '/';
                p = strchr(p, '\\');
        }
#endif

        p = path;
        oumask = 0;
        retval = 0;
#if defined(_MSC_VER) || defined(__EMX__)
        if (    (    (p[0] >= 'A' && p[0] <= 'Z')
                 ||  (p[0] >= 'a' && p[0] <= 'z'))
            && p[1] == ':')
                p += 2; /* skip the drive letter */
        else if (   p[0] == '/'
                 && p[1] == '/'
                 && p[2] != '/')
        {
                /* UNC */
                p += 2;
                while (*p && *p != '/') /* server */
                        p++;
                while (*p == '/')
                        p++;
                while (*p && *p != '/') /* share */
                        p++;
        }
#endif
        if (p[0] == '/')                /* Skip leading '/'. */
                ++p;
        for (first = 1, last = 0; !last ; ++p) {
                if (p[0] == '\0')
                        last = 1;
                else if (p[0] != '/')
                        continue;
                *p = '\0';
                if (!last && p[1] == '\0')
                        last = 1;
                if (first) {
                        /*
                         * POSIX 1003.2:
                         * For each dir operand that does not name an existing
                         * directory, effects equivalent to those cased by the
                         * following command shall occcur:
                         *
                         * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
                         *    mkdir [-m mode] dir
                         *
                         * We change the user's umask and then restore it,
                         * instead of doing chmod's.
                         */
#ifdef KMK_BUILTIN_STANDALONE
                        oumask = umask(0077);
#else
                        oumask = g_fUMask;
                        assert(oumask == umask(g_fUMask));
#endif
                        numask = oumask & ~(S_IWUSR | S_IXUSR);
                        if (numask != oumask)
                            (void)umask(numask);
                        first = 0;
                }
                if (last && oumask != numask)
                        (void)umask(oumask);
                if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
                        if (errno == EEXIST || errno == EISDIR
                            || errno == ENOSYS  /* (solaris crap) */
                            || errno == EACCES /* (ditto) */) {
                                if (stat(path, &sb) < 0) {
                                        warn(pCtx, "stat: %s", path);
                                        retval = 1;
                                        break;
                                }
                                if (!S_ISDIR(sb.st_mode)) {
                                        if (last)
                                                errno = EEXIST;
                                        else
                                                errno = ENOTDIR;
                                        warn(pCtx, "st_mode: %s", path);
                                        retval = 1;
                                        break;
                                }
                        } else {
                                warn(pCtx, "mkdir: %s", path);
                                retval = 1;
                                break;
                        }
                } else if (vflag)
                        kmk_builtin_ctx_printf(pCtx, 0, "%s\n", path);
                if (!last)
                    *p = '/';
        }
        if (!first && !last && oumask != numask)
                (void)umask(oumask);
        return (retval);
}

static int
usage(PKMKBUILTINCTX pCtx, int fIsErr)
{
        kmk_builtin_ctx_printf(pCtx, fIsErr,
                               "usage: %s [-pv] [-m mode] directory ...\n"
                               "   or: %s --help\n"
                               "   or: %s --version\n",
                               pCtx->pszProgName, pCtx->pszProgName, pCtx->pszProgName);
        return EX_USAGE;
}