0,0 → 1,254 |
/* 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. |
*/ |
|
#include <stdio.h> |
#include <stdlib.h> |
#include <unistd.h> |
#include <fcntl.h> |
#include <dirent.h> |
#include <assert.h> |
#include <getopt.h> |
|
#include "config.h" |
#include "errors.h" |
#include "util.h" |
#include "entry.h" |
#include "rm.h" |
#include "cmds.h" |
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static char *cmdname = "rm"; |
#define RM_VERSION "0.0.1" |
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static rm_job_t rm; |
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static struct option const long_options[] = { |
{ "help", no_argument, 0, 'h' }, |
{ "version", no_argument, 0, 'v' }, |
{ "recursive", no_argument, 0, 'r' }, |
{ "force", no_argument, 0, 'f' }, |
{ "safe", no_argument, 0, 's' }, |
{ 0, 0, 0, 0 } |
}; |
|
static unsigned int rm_start(rm_job_t *rm) |
{ |
rm->recursive = 0; |
rm->force = 0; |
rm->safe = 0; |
|
/* Make sure we can allocate enough memory to store |
* what is needed in the job structure */ |
if (NULL == (rm->nwd = (char *) malloc(PATH_MAX))) |
return 0; |
memset(rm->nwd, 0, sizeof(rm->nwd)); |
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if (NULL == (rm->owd = (char *) malloc(PATH_MAX))) |
return 0; |
memset(rm->owd, 0, sizeof(rm->owd)); |
|
if (NULL == (rm->cwd = (char *) malloc(PATH_MAX))) |
return 0; |
memset(rm->cwd, 0, sizeof(rm->cwd)); |
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chdir("."); |
|
if (NULL == (getcwd(rm->owd, PATH_MAX))) |
return 0; |
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return 1; |
} |
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static void rm_end(rm_job_t *rm) |
{ |
if (NULL != rm->nwd) |
free(rm->nwd); |
|
if (NULL != rm->owd) |
free(rm->owd); |
|
if (NULL != rm->cwd) |
free(rm->cwd); |
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return; |
} |
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static unsigned int rm_recursive(const char *path) |
{ |
int rc; |
|
/* First see if it will just go away */ |
rc = rmdir(path); |
if (rc == 0) |
return 0; |
|
/* Its not empty, recursively scan it */ |
cli_error(CL_ENOTSUP, |
"Can not remove %s, directory not empty", path); |
return 1; |
} |
|
static unsigned int rm_single(const char *path) |
{ |
if (unlink(path)) { |
cli_error(CL_EFAIL, "rm: could not remove file %s", path); |
return 1; |
} |
return 0; |
} |
|
static unsigned int rm_scope(const char *path) |
{ |
int fd; |
DIR *dirp; |
|
dirp = opendir(path); |
if (dirp) { |
closedir(dirp); |
return RM_DIR; |
} |
|
fd = open(path, O_RDONLY); |
if (fd > 0) { |
close(fd); |
return RM_FILE; |
} |
|
return RM_BOGUS; |
} |
|
/* Dispays help for rm in various levels */ |
void * help_cmd_rm(unsigned int level) |
{ |
if (level == HELP_SHORT) { |
printf("`%s' removes files and directories.\n", cmdname); |
} else { |
help_cmd_rm(HELP_SHORT); |
printf( |
"Usage: %s [options] <path>\n" |
"Options:\n" |
" -h, --help A short option summary\n" |
" -v, --version Print version information and exit\n" |
" -r, --recursive Recursively remove sub directories\n" |
" -f, --force Do not prompt prior to removing files\n" |
" -s, --safe Stop if directories change during removal\n\n" |
"Currently, %s is under development, some options don't work.\n", |
cmdname, cmdname); |
} |
return CMD_VOID; |
} |
|
/* Main entry point for rm, accepts an array of arguments */ |
int * cmd_rm(char **argv) |
{ |
unsigned int argc; |
unsigned int i, scope, ret = 0; |
int c, opt_ind; |
size_t len; |
char *buff = NULL; |
|
argc = cli_count_args(argv); |
|
if (argc < 2) { |
cli_error(CL_EFAIL, |
"%s: insufficient arguments. Try %s --help", cmdname, cmdname); |
return CMD_FAILURE; |
} |
|
if (!rm_start(&rm)) { |
cli_error(CL_ENOMEM, "%s: could not initialize", cmdname); |
rm_end(&rm); |
return CMD_FAILURE; |
} |
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for (c = 0, optind = 0, opt_ind = 0; c != -1;) { |
c = getopt_long(argc, argv, "hvrfs", long_options, &opt_ind); |
switch (c) { |
case 'h': |
help_cmd_rm(HELP_LONG); |
return CMD_SUCCESS; |
case 'v': |
printf("%s\n", RM_VERSION); |
return CMD_SUCCESS; |
case 'r': |
rm.recursive = 1; |
break; |
case 'f': |
rm.force = 1; |
break; |
case 's': |
rm.safe = 1; |
break; |
} |
} |
|
if (optind == argc) { |
cli_error(CL_EFAIL, |
"%s: insufficient arguments. Try %s --help", cmdname, cmdname); |
rm_end(&rm); |
return CMD_FAILURE; |
} |
|
i = optind; |
while (NULL != argv[i]) { |
len = strlen(argv[i]) + 2; |
buff = (char *) realloc(buff, len); |
assert(buff != NULL); |
memset(buff, 0, sizeof(buff)); |
snprintf(buff, len, argv[i]); |
|
scope = rm_scope(buff); |
switch (scope) { |
case RM_BOGUS: /* FIXME */ |
case RM_FILE: |
ret += rm_single(buff); |
break; |
case RM_DIR: |
if (! rm.recursive) { |
printf("%s is a directory, use -r to remove it.\n", buff); |
ret ++; |
} else { |
ret += rm_recursive(buff); |
} |
break; |
} |
i++; |
} |
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if (NULL != buff) |
free(buff); |
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rm_end(&rm); |
|
if (ret) |
return CMD_FAILURE; |
else |
return CMD_SUCCESS; |
} |
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