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3294 post 1
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * Redistributions of source code must retain the above copyright notice, this
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 * list of conditions and the following disclaimer.
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 *
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 * Redistributions in binary form must reproduce the above copyright notice,
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 * this list of conditions and the following disclaimer in the documentation
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 * and/or other materials provided with the distribution.
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 *
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 * Neither the name of the original program's authors nor the names of its
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 * contributors may be used to endorse or promote products derived from this
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 * software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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/* NOTE:
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 * This is a bit of an ugly hack, working around the absence of fstat / etc.
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 * As more stuff is completed and exposed in libc, this will improve */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include "errors.h"
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#include "config.h"
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#include "util.h"
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#include "entry.h"
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#include "ls.h"
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#include "cmds.h"
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static char *cmdname = "ls";
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static void ls_scan_dir(const char *d, DIR *dirp)
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{
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    struct dirent *dp;
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    char *buff;
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    if (! dirp)
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        return;
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    buff = (char *)malloc(PATH_MAX);
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    if (NULL == buff) {
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        cli_error(CL_ENOMEM, "ls: failed to scan %s", d);
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        return;
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    }
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    while ((dp = readdir(dirp))) {
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        memset(buff, 0, sizeof(buff));
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        /* Don't worry if inserting a double slash, this will be fixed by
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         * absolutize() later with subsequent calls to open() or readdir() */
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        snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);
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        ls_print(dp->d_name, buff);
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    }
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    free(buff);
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    return;
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}
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/* ls_print currently does nothing more than print the entry.
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 * in the future, we will likely pass the absolute path, and
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 * some sort of ls_options structure that controls how each
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 * entry is printed and what is printed about it.
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 *
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 * Now we just print basic DOS style lists */
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static void ls_print(const char *name, const char *pathname)
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{
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    struct stat s;
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    int rc;
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    rc = stat(pathname, &s);
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    if (rc != 0) {
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        /* Odd chance it was deleted from the time readdir() found it */
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        printf("ls: skipping bogus node %s\n", pathname);
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        printf("rc=%d\n", rc);
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        return;
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    }
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    if (s.is_file)
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        printf("%-40s\t%llu\n", name, (long long) s.size);
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    else
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        printf("%-40s\n", name);
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    return;
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}
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void help_cmd_ls(unsigned int level)
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{
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    if (level == HELP_SHORT) {
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        printf("`%s' lists files and directories.\n", cmdname);
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    } else {
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        help_cmd_ls(HELP_SHORT);
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        printf("  `%s' [path], if no path is given the current "
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                "working directory is used.\n", cmdname);
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    }
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    return;
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}
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int cmd_ls(char **argv)
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{
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    unsigned int argc;
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    struct stat s;
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    char *buff;
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    DIR *dirp;
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    argc = cli_count_args(argv);
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    buff = (char *) malloc(PATH_MAX);
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    if (NULL == buff) {
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        cli_error(CL_ENOMEM, "%s: ", cmdname);
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        return CMD_FAILURE;
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    }
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    memset(buff, 0, sizeof(buff));
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    if (argc == 1)
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        getcwd(buff, PATH_MAX);
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    else
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        str_cpy(buff, PATH_MAX, argv[1]);
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    if (stat(buff, &s)) {
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        cli_error(CL_ENOENT, buff);
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        free(buff);
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        return CMD_FAILURE;
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    }
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    if (s.is_file) {
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        ls_print(buff, buff);
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    } else {
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        dirp = opendir(buff);
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        if (!dirp) {
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            /* May have been deleted between scoping it and opening it */
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            cli_error(CL_EFAIL, "Could not stat %s", buff);
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            free(buff);
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            return CMD_FAILURE;
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        }
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        ls_scan_dir(buff, dirp);
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        closedir(dirp);
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    }
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    free(buff);
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    return CMD_SUCCESS;
3277 post 165
}
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