WebSVN – HelenOS – Diff – /trunk/uspace/app/bdsh/cmds/modules/rm/rm.c


/* 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"
 
static char *cmdname = "rm";
#define RM_VERSION "0.0.1"
 
static rm_job_t rm;
 
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));
 
    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));
 
    chdir(".");
 
    if (NULL == (getcwd(rm->owd, PATH_MAX)))
        return 0;
 
    return 1;
}
 
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);
 
    return;
}
 
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;
    }
 
    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++;
    }
 
    if (NULL != buff)
        free(buff);
 
    rm_end(&rm);
 
    if (ret)
        return CMD_FAILURE;
    else
        return CMD_SUCCESS;
}
 
 

Rev 3375	Rev 3376
1	/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>	1	/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
2	* All rights reserved.	2	* All rights reserved.
3	*	3	*
4	* Redistribution and use in source and binary forms, with or without	4	* Redistribution and use in source and binary forms, with or without
5	* modification, are permitted provided that the following conditions are met:	5	* modification, are permitted provided that the following conditions are met:
6	*	6	*
7	* Redistributions of source code must retain the above copyright notice, this	7	* Redistributions of source code must retain the above copyright notice, this
8	* list of conditions and the following disclaimer.	8	* list of conditions and the following disclaimer.
9	*	9	*
10	* Redistributions in binary form must reproduce the above copyright notice,	10	* Redistributions in binary form must reproduce the above copyright notice,
11	* this list of conditions and the following disclaimer in the documentation	11	* this list of conditions and the following disclaimer in the documentation
12	* and/or other materials provided with the distribution.	12	* and/or other materials provided with the distribution.
13	*	13	*
14	* Neither the name of the original program's authors nor the names of its	14	* Neither the name of the original program's authors nor the names of its
15	* contributors may be used to endorse or promote products derived from this	15	* contributors may be used to endorse or promote products derived from this
16	* software without specific prior written permission.	16	* software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"	18	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE	19	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR	22	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF	23	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS	24	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN	25	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)	26	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE	27	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28	* POSSIBILITY OF SUCH DAMAGE.	28	* POSSIBILITY OF SUCH DAMAGE.
29	*/	29	*/
30		30
31	#include <stdio.h>	31	#include <stdio.h>
32	#include <stdlib.h>	32	#include <stdlib.h>
33	#include <unistd.h>	33	#include <unistd.h>
34	#include <fcntl.h>	34	#include <fcntl.h>
35	#include <dirent.h>	35	#include <dirent.h>
36	#include <assert.h>	36	#include <assert.h>
37	#include <getopt.h>	37	#include <getopt.h>
38		38
39	#include "config.h"	39	#include "config.h"
40	#include "errors.h"	40	#include "errors.h"
41	#include "util.h"	41	#include "util.h"
42	#include "entry.h"	42	#include "entry.h"
43	#include "rm.h"	43	#include "rm.h"
44	#include "cmds.h"	44	#include "cmds.h"
45		45
46	static char *cmdname = "rm";	46	static char *cmdname = "rm";
47	#define RM_VERSION "0.0.1"	47	#define RM_VERSION "0.0.1"
48		48
49	static rm_job_t rm;	49	static rm_job_t rm;
50		50
51	static struct option const long_options[] = {	51	static struct option const long_options[] = {
52	{ "help", no_argument, 0, 'h' },	52	{ "help", no_argument, 0, 'h' },
53	{ "version", no_argument, 0, 'v' },	53	{ "version", no_argument, 0, 'v' },
54	{ "recursive", no_argument, 0, 'r' },	54	{ "recursive", no_argument, 0, 'r' },
55	{ "force", no_argument, 0, 'f' },	55	{ "force", no_argument, 0, 'f' },
56	{ "safe", no_argument, 0, 's' },	56	{ "safe", no_argument, 0, 's' },
57	{ 0, 0, 0, 0 }	57	{ 0, 0, 0, 0 }
58	};	58	};
59		59
60	static unsigned int rm_start(rm_job_t *rm)	60	static unsigned int rm_start(rm_job_t *rm)
61	{	61	{
62	rm->recursive = 0;	62	rm->recursive = 0;
63	rm->force = 0;	63	rm->force = 0;
64	rm->safe = 0;	64	rm->safe = 0;
65		65
66	/* Make sure we can allocate enough memory to store	66	/* Make sure we can allocate enough memory to store
67	* what is needed in the job structure */	67	* what is needed in the job structure */
68	if (NULL == (rm->nwd = (char *) malloc(PATH_MAX)))	68	if (NULL == (rm->nwd = (char *) malloc(PATH_MAX)))
69	return 0;	69	return 0;
70	memset(rm->nwd, 0, sizeof(rm->nwd));	70	memset(rm->nwd, 0, sizeof(rm->nwd));
71		71
72	if (NULL == (rm->owd = (char *) malloc(PATH_MAX)))	72	if (NULL == (rm->owd = (char *) malloc(PATH_MAX)))
73	return 0;	73	return 0;
74	memset(rm->owd, 0, sizeof(rm->owd));	74	memset(rm->owd, 0, sizeof(rm->owd));
75		75
76	if (NULL == (rm->cwd = (char *) malloc(PATH_MAX)))	76	if (NULL == (rm->cwd = (char *) malloc(PATH_MAX)))
77	return 0;	77	return 0;
78	memset(rm->cwd, 0, sizeof(rm->cwd));	78	memset(rm->cwd, 0, sizeof(rm->cwd));
79		79
80	chdir(".");	80	chdir(".");
81		81
82	if (NULL == (getcwd(rm->owd, PATH_MAX)))	82	if (NULL == (getcwd(rm->owd, PATH_MAX)))
83	return 0;	83	return 0;
84		84
85	return 1;	85	return 1;
86	}	86	}
87		87
88	static void rm_end(rm_job_t *rm)	88	static void rm_end(rm_job_t *rm)
89	{	89	{
90	if (NULL != rm->nwd)	90	if (NULL != rm->nwd)
91	free(rm->nwd);	91	free(rm->nwd);
92		92
93	if (NULL != rm->owd)	93	if (NULL != rm->owd)
94	free(rm->owd);	94	free(rm->owd);
95		95
96	if (NULL != rm->cwd)	96	if (NULL != rm->cwd)
97	free(rm->cwd);	97	free(rm->cwd);
98		98
99	return;	99	return;
100	}	100	}
101		101
102	static unsigned int rm_recursive(const char *path)	102	static unsigned int rm_recursive(const char *path)
103	{	103	{
104	int rc;	104	int rc;
105		105
106	/* First see if it will just go away */	106	/* First see if it will just go away */
107	rc = rmdir(path);	107	rc = rmdir(path);
108	if (rc == 0)	108	if (rc == 0)
109	return 0;	109	return 0;
110		110
111	/* Its not empty, recursively scan it */	111	/* Its not empty, recursively scan it */
112	cli_error(CL_ENOTSUP,	112	cli_error(CL_ENOTSUP,
113	"Can not remove %s, directory not empty", path);	113	"Can not remove %s, directory not empty", path);
114	return 1;	114	return 1;
115	}	115	}
116		116
117	static unsigned int rm_single(const char *path)	117	static unsigned int rm_single(const char *path)
118	{	118	{
119	if (unlink(path)) {	119	if (unlink(path)) {
120	cli_error(CL_EFAIL, "rm: could not remove file %s", path);	120	cli_error(CL_EFAIL, "rm: could not remove file %s", path);
121	return 1;	121	return 1;
122	}	122	}
123	return 0;	123	return 0;
124	}	124	}
125		125
126	static unsigned int rm_scope(const char *path)	126	static unsigned int rm_scope(const char *path)
127	{	127	{
128	int fd;	128	int fd;
129	DIR *dirp;	129	DIR *dirp;
130		130
131	dirp = opendir(path);	131	dirp = opendir(path);
132	if (dirp) {	132	if (dirp) {
133	closedir(dirp);	133	closedir(dirp);
134	return RM_DIR;	134	return RM_DIR;
135	}	135	}
136		136
137	fd = open(path, O_RDONLY);	137	fd = open(path, O_RDONLY);
138	if (fd > 0) {	138	if (fd > 0) {
139	close(fd);	139	close(fd);
140	return RM_FILE;	140	return RM_FILE;
141	}	141	}
142		142
143	return RM_BOGUS;	143	return RM_BOGUS;
144	}	144	}
145		145
146	/* Dispays help for rm in various levels */	146	/* Dispays help for rm in various levels */
147	void * help_cmd_rm(unsigned int level)	147	void * help_cmd_rm(unsigned int level)
148	{	148	{
149	if (level == HELP_SHORT) {	149	if (level == HELP_SHORT) {
150	printf("`%s' removes files and directories.\n", cmdname);	150	printf("`%s' removes files and directories.\n", cmdname);
151	} else {	151	} else {
152	help_cmd_rm(HELP_SHORT);	152	help_cmd_rm(HELP_SHORT);
153	printf(	153	printf(
154	"Usage: %s [options] <path>\n"	154	"Usage: %s [options] <path>\n"
155	"Options:\n"	155	"Options:\n"
156	" -h, --help A short option summary\n"	156	" -h, --help A short option summary\n"
157	" -v, --version Print version information and exit\n"	157	" -v, --version Print version information and exit\n"
158	" -r, --recursive Recursively remove sub directories\n"	158	" -r, --recursive Recursively remove sub directories\n"
159	" -f, --force Do not prompt prior to removing files\n"	159	" -f, --force Do not prompt prior to removing files\n"
160	" -s, --safe Stop if directories change during removal\n\n"	160	" -s, --safe Stop if directories change during removal\n\n"
161	"Currently, %s is under development, some options don't work.\n",	161	"Currently, %s is under development, some options don't work.\n",
162	cmdname, cmdname);	162	cmdname, cmdname);
163	}	163	}
164	return CMD_VOID;	164	return CMD_VOID;
165	}	165	}
166		166
167	/* Main entry point for rm, accepts an array of arguments */	167	/* Main entry point for rm, accepts an array of arguments */
168	int * cmd_rm(char **argv)	168	int * cmd_rm(char **argv)
169	{	169	{
170	unsigned int argc;	170	unsigned int argc;
171	unsigned int i, scope, ret = 0;	171	unsigned int i, scope, ret = 0;
172	int c, opt_ind;	172	int c, opt_ind;
173	size_t len;	173	size_t len;
174	char *buff = NULL;	174	char *buff = NULL;
175		175
176	for (argc = 0; argv[argc] != NULL; argc ++);	176	argc = cli_count_args(argv);
-		177
177	if (argc < 2) {	178	if (argc < 2) {
178	cli_error(CL_EFAIL,	179	cli_error(CL_EFAIL,
179	"%s: insufficient arguments. Try %s --help", cmdname, cmdname);	180	"%s: insufficient arguments. Try %s --help", cmdname, cmdname);
180	return CMD_FAILURE;	181	return CMD_FAILURE;
181	}	182	}
182		183
183	if (!rm_start(&rm)) {	184	if (!rm_start(&rm)) {
184	cli_error(CL_ENOMEM, "%s: could not initialize", cmdname);	185	cli_error(CL_ENOMEM, "%s: could not initialize", cmdname);
185	rm_end(&rm);	186	rm_end(&rm);
186	return CMD_FAILURE;	187	return CMD_FAILURE;
187	}	188	}
188		189
189	for (c = 0, optind = 0, opt_ind = 0; c != -1;) {	190	for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
190	c = getopt_long(argc, argv, "hvrfs", long_options, &opt_ind);	191	c = getopt_long(argc, argv, "hvrfs", long_options, &opt_ind);
191	switch (c) {	192	switch (c) {
192	case 'h':	193	case 'h':
193	help_cmd_rm(HELP_LONG);	194	help_cmd_rm(HELP_LONG);
194	return CMD_SUCCESS;	195	return CMD_SUCCESS;
195	case 'v':	196	case 'v':
196	printf("%s\n", RM_VERSION);	197	printf("%s\n", RM_VERSION);
197	return CMD_SUCCESS;	198	return CMD_SUCCESS;
198	case 'r':	199	case 'r':
199	rm.recursive = 1;	200	rm.recursive = 1;
200	break;	201	break;
201	case 'f':	202	case 'f':
202	rm.force = 1;	203	rm.force = 1;
203	break;	204	break;
204	case 's':	205	case 's':
205	rm.safe = 1;	206	rm.safe = 1;
206	break;	207	break;
207	}	208	}
208	}	209	}
209		210
210	if (optind == argc) {	211	if (optind == argc) {
211	cli_error(CL_EFAIL,	212	cli_error(CL_EFAIL,
212	"%s: insufficient arguments. Try %s --help", cmdname, cmdname);	213	"%s: insufficient arguments. Try %s --help", cmdname, cmdname);
213	rm_end(&rm);	214	rm_end(&rm);
214	return CMD_FAILURE;	215	return CMD_FAILURE;
215	}	216	}
216		217
217	i = optind;	218	i = optind;
218	while (NULL != argv[i]) {	219	while (NULL != argv[i]) {
219	len = strlen(argv[i]) + 2;	220	len = strlen(argv[i]) + 2;
220	buff = (char *) realloc(buff, len);	221	buff = (char *) realloc(buff, len);
221	assert(buff != NULL);	222	assert(buff != NULL);
222	memset(buff, 0, sizeof(buff));	223	memset(buff, 0, sizeof(buff));
223	snprintf(buff, len, argv[i]);	224	snprintf(buff, len, argv[i]);
224		225
225	scope = rm_scope(buff);	226	scope = rm_scope(buff);
226	switch (scope) {	227	switch (scope) {
227	case RM_BOGUS: /* FIXME */	228	case RM_BOGUS: /* FIXME */
228	case RM_FILE:	229	case RM_FILE:
229	ret += rm_single(buff);	230	ret += rm_single(buff);
230	break;	231	break;
231	case RM_DIR:	232	case RM_DIR:
232	if (! rm.recursive) {	233	if (! rm.recursive) {
233	printf("%s is a directory, use -r to remove it.\n", buff);	234	printf("%s is a directory, use -r to remove it.\n", buff);
234	ret ++;	235	ret ++;
235	} else {	236	} else {
236	ret += rm_recursive(buff);	237	ret += rm_recursive(buff);
237	}	238	}
238	break;	239	break;
239	}	240	}
240	i++;	241	i++;
241	}	242	}
242		243
243	if (NULL != buff)	244	if (NULL != buff)
244	free(buff);	245	free(buff);
245		246
246	rm_end(&rm);	247	rm_end(&rm);
247		248
248	if (ret)	249	if (ret)
249	return CMD_FAILURE;	250	return CMD_FAILURE;
250	else	251	else
251	return CMD_SUCCESS;	252	return CMD_SUCCESS;
252	}	253	}
253		254
254		255

Subversion Repositories HelenOS

(root)/trunk/uspace/app/bdsh/cmds/modules/rm/rm.c – Rev 3375 → 3376