WebSVN – HelenOS – Diff – /branches/dynload/uspace/app/bdsh/cmds/modules/ls/ls.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.
 */
 
/* 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 */
 
#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>
 
#include "errors.h"
#include "config.h"
#include "util.h"
#include "entry.h"
#include "ls.h"
#include "cmds.h"
 
static char *cmdname = "ls";
 
static inline off_t flen(const char *f)
{
    int fd;
    off_t size;
 
    fd = open(f, O_RDONLY);
    if (fd == -1)
        return 0;
 
    size = lseek(fd, 0, SEEK_END);
    close(fd);
 
    if (size < 0)
        size = 0;
 
    return size;
}
 
static unsigned int ls_scope(const char *path)
{
    int fd;
    DIR *dirp;
 
    dirp = opendir(path);
    if (dirp) {
        closedir(dirp);
        return LS_DIR;
    }
 
    fd = open(path, O_RDONLY);
    if (fd > 0) {
        close(fd);
        return LS_FILE;
    }
 
    return LS_BOGUS;
}
 
static void ls_scan_dir(const char *d, DIR *dirp)
{
    struct dirent *dp;
    unsigned int scope;
    char *buff;
 
    if (! dirp)
        return;
 
    buff = (char *)malloc(PATH_MAX);
    if (NULL == buff) {
        cli_error(CL_ENOMEM, "ls: failed to scan %s", d);
        return;
    }
 
    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, buff);
            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;
        }
    }
 
    free(buff);
 
    return;
}
 
/* 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 */
 
static void ls_print_dir(const char *d)
{
    printf("%-40s\t<dir>\n", d);
 
    return;
}
 
static void ls_print_file(const char *name, const char *pathname)
{
    printf("%-40s\t%llu\n", name, (long long) flen(pathname));
 
    return;
}
 
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);
    }
 
    return;
}
 
int cmd_ls(char **argv)
{
    unsigned int argc;
    unsigned int scope;
    char *buff;
    DIR *dirp;
 
    argc = cli_count_args(argv);
 
    buff = (char *) malloc(PATH_MAX);
    if (NULL == buff) {
        cli_error(CL_ENOMEM, "%s: ", cmdname);
        return CMD_FAILURE;
    }
    memset(buff, 0, sizeof(buff));
 
    if (argc == 1)
        getcwd(buff, PATH_MAX);
    else
        str_cpy(buff, PATH_MAX, argv[1]);
 
    scope = ls_scope(buff);
 
    switch (scope) {
    case LS_BOGUS:
        cli_error(CL_ENOENT, buff);
        free(buff);
        return CMD_FAILURE;
    case LS_FILE:
        ls_print_file(buff, 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;
    }
 
    free(buff);
 
    return CMD_SUCCESS;
}
 
 

Rev 4344	Rev 4348
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	/* NOTE:	31	/* NOTE:
32	* This is a bit of an ugly hack, working around the absence of fstat / etc.	32	* This is a bit of an ugly hack, working around the absence of fstat / etc.
33	* As more stuff is completed and exposed in libc, this will improve */	33	* As more stuff is completed and exposed in libc, this will improve */
34		34
35	#include <stdio.h>	35	#include <stdio.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
37	#include <unistd.h>	37	#include <unistd.h>
38	#include <dirent.h>	38	#include <dirent.h>
39	#include <fcntl.h>	39	#include <fcntl.h>
40	#include <sys/types.h>	40	#include <sys/types.h>
41	#include <sys/stat.h>	41	#include <sys/stat.h>
42	#include <string.h>	42	#include <string.h>
43		43
44	#include "errors.h"	44	#include "errors.h"
45	#include "config.h"	45	#include "config.h"
46	#include "util.h"	46	#include "util.h"
47	#include "entry.h"	47	#include "entry.h"
48	#include "ls.h"	48	#include "ls.h"
49	#include "cmds.h"	49	#include "cmds.h"
50		50
51	static char *cmdname = "ls";	51	static char *cmdname = "ls";
52		52
53	static inline off_t flen(const char *f)	53	static inline off_t flen(const char *f)
54	{	54	{
55	int fd;	55	int fd;
56	off_t size;	56	off_t size;
57		57
58	fd = open(f, O_RDONLY);	58	fd = open(f, O_RDONLY);
59	if (fd == -1)	59	if (fd == -1)
60	return 0;	60	return 0;
61		61
62	size = lseek(fd, 0, SEEK_END);	62	size = lseek(fd, 0, SEEK_END);
63	close(fd);	63	close(fd);
64		64
65	if (size < 0)	65	if (size < 0)
66	size = 0;	66	size = 0;
67		67
68	return size;	68	return size;
69	}	69	}
70		70
71	static unsigned int ls_scope(const char *path)	71	static unsigned int ls_scope(const char *path)
72	{	72	{
73	int fd;	73	int fd;
74	DIR *dirp;	74	DIR *dirp;
75		75
76	dirp = opendir(path);	76	dirp = opendir(path);
77	if (dirp) {	77	if (dirp) {
78	closedir(dirp);	78	closedir(dirp);
79	return LS_DIR;	79	return LS_DIR;
80	}	80	}
81		81
82	fd = open(path, O_RDONLY);	82	fd = open(path, O_RDONLY);
83	if (fd > 0) {	83	if (fd > 0) {
84	close(fd);	84	close(fd);
85	return LS_FILE;	85	return LS_FILE;
86	}	86	}
87		87
88	return LS_BOGUS;	88	return LS_BOGUS;
89	}	89	}
90		90
91	static void ls_scan_dir(const char d, DIR dirp)	91	static void ls_scan_dir(const char d, DIR dirp)
92	{	92	{
93	struct dirent *dp;	93	struct dirent *dp;
94	unsigned int scope;	94	unsigned int scope;
95	char *buff;	95	char *buff;
96		96
97	if (! dirp)	97	if (! dirp)
98	return;	98	return;
99		99
100	buff = (char *)malloc(PATH_MAX);	100	buff = (char *)malloc(PATH_MAX);
101	if (NULL == buff) {	101	if (NULL == buff) {
102	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);	102	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);
103	return;	103	return;
104	}	104	}
105		105
106	while ((dp = readdir(dirp))) {	106	while ((dp = readdir(dirp))) {
107	memset(buff, 0, sizeof(buff));	107	memset(buff, 0, sizeof(buff));
108	/* Don't worry if inserting a double slash, this will be fixed by	108	/* Don't worry if inserting a double slash, this will be fixed by
109	* absolutize() later with subsequent calls to open() or readdir() */	109	* absolutize() later with subsequent calls to open() or readdir() */
110	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);	110	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);
111	scope = ls_scope(buff);	111	scope = ls_scope(buff);
112	switch (scope) {	112	switch (scope) {
113	case LS_DIR:	113	case LS_DIR:
114	ls_print_dir(dp->d_name);	114	ls_print_dir(dp->d_name);
115	break;	115	break;
116	case LS_FILE:	116	case LS_FILE:
117	ls_print_file(dp->d_name, buff);	117	ls_print_file(dp->d_name, buff);
118	break;	118	break;
119	case LS_BOGUS:	119	case LS_BOGUS:
120	/* Odd chance it was deleted from the time readdir() found	120	/* Odd chance it was deleted from the time readdir() found
121	* it and the time that it was scoped */	121	* it and the time that it was scoped */
122	printf("ls: skipping bogus node %s\n", dp->d_name);	122	printf("ls: skipping bogus node %s\n", dp->d_name);
123	break;	123	break;
124	}	124	}
125	}	125	}
126		126
127	free(buff);	127	free(buff);
128		128
129	return;	129	return;
130	}	130	}
131		131
132	/* ls_print_* currently does nothing more than print the entry.	132	/* ls_print_* currently does nothing more than print the entry.
133	* in the future, we will likely pass the absolute path, and	133	* in the future, we will likely pass the absolute path, and
134	* some sort of ls_options structure that controls how each	134	* some sort of ls_options structure that controls how each
135	* entry is printed and what is printed about it.	135	* entry is printed and what is printed about it.
136	*	136	*
137	* Now we just print basic DOS style lists */	137	* Now we just print basic DOS style lists */
138		138
139	static void ls_print_dir(const char *d)	139	static void ls_print_dir(const char *d)
140	{	140	{
141	printf("%-40s\t<dir>\n", d);	141	printf("%-40s\t<dir>\n", d);
142		142
143	return;	143	return;
144	}	144	}
145		145
146	static void ls_print_file(const char name, const char pathname)	146	static void ls_print_file(const char name, const char pathname)
147	{	147	{
148	printf("%-40s\t%llu\n", name, (long long) flen(pathname));	148	printf("%-40s\t%llu\n", name, (long long) flen(pathname));
149		149
150	return;	150	return;
151	}	151	}
152		152
153	void help_cmd_ls(unsigned int level)	153	void help_cmd_ls(unsigned int level)
154	{	154	{
155	if (level == HELP_SHORT) {	155	if (level == HELP_SHORT) {
156	printf("`%s' lists files and directories.\n", cmdname);	156	printf("`%s' lists files and directories.\n", cmdname);
157	} else {	157	} else {
158	help_cmd_ls(HELP_SHORT);	158	help_cmd_ls(HELP_SHORT);
159	printf(" `%s' [path], if no path is given the current "	159	printf(" `%s' [path], if no path is given the current "
160	"working directory is used.\n", cmdname);	160	"working directory is used.\n", cmdname);
161	}	161	}
162		162
163	return;	163	return;
164	}	164	}
165		165
166	int cmd_ls(char **argv)	166	int cmd_ls(char **argv)
167	{	167	{
168	unsigned int argc;	168	unsigned int argc;
169	unsigned int scope;	169	unsigned int scope;
170	char *buff;	170	char *buff;
171	DIR *dirp;	171	DIR *dirp;
172		172
173	argc = cli_count_args(argv);	173	argc = cli_count_args(argv);
174		174
175	buff = (char *) malloc(PATH_MAX);	175	buff = (char *) malloc(PATH_MAX);
176	if (NULL == buff) {	176	if (NULL == buff) {
177	cli_error(CL_ENOMEM, "%s: ", cmdname);	177	cli_error(CL_ENOMEM, "%s: ", cmdname);
178	return CMD_FAILURE;	178	return CMD_FAILURE;
179	}	179	}
180	memset(buff, 0, sizeof(buff));	180	memset(buff, 0, sizeof(buff));
181		181
182	if (argc == 1)	182	if (argc == 1)
183	getcwd(buff, PATH_MAX);	183	getcwd(buff, PATH_MAX);
184	else	184	else
185	strncpy(buff, argv[1], PATH_MAX);	185	str_cpy(buff, PATH_MAX, argv[1]);
186		186
187	scope = ls_scope(buff);	187	scope = ls_scope(buff);
188		188
189	switch (scope) {	189	switch (scope) {
190	case LS_BOGUS:	190	case LS_BOGUS:
191	cli_error(CL_ENOENT, buff);	191	cli_error(CL_ENOENT, buff);
192	free(buff);	192	free(buff);
193	return CMD_FAILURE;	193	return CMD_FAILURE;
194	case LS_FILE:	194	case LS_FILE:
195	ls_print_file(buff, buff);	195	ls_print_file(buff, buff);
196	break;	196	break;
197	case LS_DIR:	197	case LS_DIR:
198	dirp = opendir(buff);	198	dirp = opendir(buff);
199	if (! dirp) {	199	if (! dirp) {
200	/* May have been deleted between scoping it and opening it */	200	/* May have been deleted between scoping it and opening it */
201	cli_error(CL_EFAIL, "Could not stat %s", buff);	201	cli_error(CL_EFAIL, "Could not stat %s", buff);
202	free(buff);	202	free(buff);
203	return CMD_FAILURE;	203	return CMD_FAILURE;
204	}	204	}
205	ls_scan_dir(buff, dirp);	205	ls_scan_dir(buff, dirp);
206	closedir(dirp);	206	closedir(dirp);
207	break;	207	break;
208	}	208	}
209		209
210	free(buff);	210	free(buff);
211		211
212	return CMD_SUCCESS;	212	return CMD_SUCCESS;
213	}	213	}
214		214
215		215

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(root)/branches/dynload/uspace/app/bdsh/cmds/modules/ls/ls.c – Rev 4344 → 4348