0,0 → 1,196 |
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions are met: |
* |
* Redistributions of source code must retain the above copyright notice, this |
* list of conditions and the following disclaimer. |
* |
* 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. |
* |
* Neither the name of the original program's authors 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. |
*/ |
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/* NOTE: |
* This is a bit of an ugly hack, working around the absence of fstat / etc. |
* As more stuff is completed and exposed in libc, this will improve */ |
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#include <stdio.h> |
#include <stdlib.h> |
#include <unistd.h> |
#include <dirent.h> |
#include <fcntl.h> |
#include <sys/types.h> |
#include <sys/stat.h> |
#include <string.h> |
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#include "errors.h" |
#include "config.h" |
#include "util.h" |
#include "entry.h" |
#include "ls.h" |
#include "cmds.h" |
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static char *cmdname = "ls"; |
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static unsigned int ls_scope(const char *path) |
{ |
int fd; |
DIR *dirp; |
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dirp = opendir(path); |
if (dirp) { |
closedir(dirp); |
return LS_DIR; |
} |
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fd = open(path, O_RDONLY); |
if (fd > 0) { |
close(fd); |
return LS_FILE; |
} |
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return LS_BOGUS; |
} |
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static void ls_scan_dir(const char *d, DIR *dirp) |
{ |
struct dirent *dp; |
unsigned int scope; |
char *buff; |
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if (! dirp) |
return; |
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buff = (char *)malloc(PATH_MAX); |
if (NULL == buff) { |
cli_error(CL_ENOMEM, "ls: failed to scan %s", d); |
return; |
} |
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while ((dp = readdir(dirp))) { |
memset(buff, 0, sizeof(buff)); |
/* Don't worry if inserting a double slash, this will be fixed by |
* absolutize() later with subsequent calls to open() or readdir() */ |
snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name); |
scope = ls_scope(buff); |
switch (scope) { |
case LS_DIR: |
ls_print_dir(dp->d_name); |
break; |
case LS_FILE: |
ls_print_file(dp->d_name); |
break; |
case LS_BOGUS: |
/* Odd chance it was deleted from the time readdir() found |
* it and the time that it was scoped */ |
printf("ls: skipping bogus node %s\n", dp->d_name); |
break; |
} |
} |
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free(buff); |
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return; |
} |
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/* ls_print_* currently does nothing more than print the entry. |
* in the future, we will likely pass the absolute path, and |
* some sort of ls_options structure that controls how each |
* entry is printed and what is printed about it. |
* |
* Now we just print basic DOS style lists */ |
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static void ls_print_dir(const char *d) |
{ |
printf("%-40s\t<DIR>\n", d); |
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return; |
} |
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static void ls_print_file(const char *f) |
{ |
printf("%-40s\n", f); |
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return; |
} |
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void * help_cmd_ls(unsigned int level) |
{ |
if (level == HELP_SHORT) { |
printf("`%s' lists files and directories.\n", cmdname); |
} else { |
help_cmd_ls(HELP_SHORT); |
printf(" `%s' [path], if no path is given the current " |
"working directory is used.\n", cmdname); |
} |
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return CMD_VOID; |
} |
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int * cmd_ls(char **argv) |
{ |
unsigned int argc; |
unsigned int scope; |
char *buff; |
DIR *dirp; |
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argc = cli_count_args(argv); |
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buff = (char *) malloc(PATH_MAX); |
if (NULL == buff) { |
cli_error(CL_ENOMEM, "%s: ", cmdname); |
return CMD_FAILURE; |
} |
memset(buff, 0, sizeof(buff)); |
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if (argc == 1) |
getcwd(buff, PATH_MAX); |
else |
strncpy(buff, argv[1], PATH_MAX); |
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scope = ls_scope(buff); |
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switch (scope) { |
case LS_BOGUS: |
cli_error(CL_ENOENT, buff); |
free(buff); |
return CMD_FAILURE; |
case LS_FILE: |
ls_print_file(buff); |
break; |
case LS_DIR: |
dirp = opendir(buff); |
if (! dirp) { |
/* May have been deleted between scoping it and opening it */ |
cli_error(CL_EFAIL, "Could not stat %s", buff); |
free(buff); |
return CMD_FAILURE; |
} |
ls_scan_dir(buff, dirp); |
closedir(dirp); |
break; |
} |
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free(buff); |
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return CMD_SUCCESS; |
} |
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