WebSVN – HelenOS – Diff – /trunk/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 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);
            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 *f)
{
    printf("%-40s\n", f);
 
    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 CMD_VOID;
}
 
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
        strncpy(buff, argv[1], PATH_MAX);
 
    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);
        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 3364	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	/* 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 unsigned int ls_scope(const char *path)	53	static unsigned int ls_scope(const char *path)
54	{	54	{
55	int fd;	55	int fd;
56	DIR *dirp;	56	DIR *dirp;
57		57
58	dirp = opendir(path);	58	dirp = opendir(path);
59	if (dirp) {	59	if (dirp) {
60	closedir(dirp);	60	closedir(dirp);
61	return LS_DIR;	61	return LS_DIR;
62	}	62	}
63		63
64	fd = open(path, O_RDONLY);	64	fd = open(path, O_RDONLY);
65	if (fd > 0) {	65	if (fd > 0) {
66	close(fd);	66	close(fd);
67	return LS_FILE;	67	return LS_FILE;
68	}	68	}
69		69
70	return LS_BOGUS;	70	return LS_BOGUS;
71	}	71	}
72		72
73	static void ls_scan_dir(const char d, DIR dirp)	73	static void ls_scan_dir(const char d, DIR dirp)
74	{	74	{
75	struct dirent *dp;	75	struct dirent *dp;
76	unsigned int scope;	76	unsigned int scope;
77	char *buff;	77	char *buff;
78		78
79	if (! dirp)	79	if (! dirp)
80	return;	80	return;
81		81
82	buff = (char *)malloc(PATH_MAX);	82	buff = (char *)malloc(PATH_MAX);
83	if (NULL == buff) {	83	if (NULL == buff) {
84	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);	84	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);
85	return;	85	return;
86	}	86	}
87		87
88	while ((dp = readdir(dirp))) {	88	while ((dp = readdir(dirp))) {
89	memset(buff, 0, sizeof(buff));	89	memset(buff, 0, sizeof(buff));
90	/* Don't worry if inserting a double slash, this will be fixed by	90	/* Don't worry if inserting a double slash, this will be fixed by
91	* absolutize() later with subsequent calls to open() or readdir() */	91	* absolutize() later with subsequent calls to open() or readdir() */
92	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);	92	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);
93	scope = ls_scope(buff);	93	scope = ls_scope(buff);
94	switch (scope) {	94	switch (scope) {
95	case LS_DIR:	95	case LS_DIR:
96	ls_print_dir(dp->d_name);	96	ls_print_dir(dp->d_name);
97	break;	97	break;
98	case LS_FILE:	98	case LS_FILE:
99	ls_print_file(dp->d_name);	99	ls_print_file(dp->d_name);
100	break;	100	break;
101	case LS_BOGUS:	101	case LS_BOGUS:
102	/* Odd chance it was deleted from the time readdir() found	102	/* Odd chance it was deleted from the time readdir() found
103	* it and the time that it was scoped */	103	* it and the time that it was scoped */
104	printf("ls: skipping bogus node %s\n", dp->d_name);	104	printf("ls: skipping bogus node %s\n", dp->d_name);
105	break;	105	break;
106	}	106	}
107	}	107	}
108		108
109	free(buff);	109	free(buff);
110		110
111	return;	111	return;
112	}	112	}
113		113
114	/* ls_print_* currently does nothing more than print the entry.	114	/* ls_print_* currently does nothing more than print the entry.
115	* in the future, we will likely pass the absolute path, and	115	* in the future, we will likely pass the absolute path, and
116	* some sort of ls_options structure that controls how each	116	* some sort of ls_options structure that controls how each
117	* entry is printed and what is printed about it.	117	* entry is printed and what is printed about it.
118	*	118	*
119	* Now we just print basic DOS style lists */	119	* Now we just print basic DOS style lists */
120		120
121	static void ls_print_dir(const char *d)	121	static void ls_print_dir(const char *d)
122	{	122	{
123	printf("%-40s\t<DIR>\n", d);	123	printf("%-40s\t<DIR>\n", d);
124		124
125	return;	125	return;
126	}	126	}
127		127
128	static void ls_print_file(const char *f)	128	static void ls_print_file(const char *f)
129	{	129	{
130	printf("%-40s\n", f);	130	printf("%-40s\n", f);
131		131
132	return;	132	return;
133	}	133	}
134		134
135	void * help_cmd_ls(unsigned int level)	135	void * help_cmd_ls(unsigned int level)
136	{	136	{
137	if (level == HELP_SHORT) {	137	if (level == HELP_SHORT) {
138	printf("`%s' lists files and directories.\n", cmdname);	138	printf("`%s' lists files and directories.\n", cmdname);
139	} else {	139	} else {
140	help_cmd_ls(HELP_SHORT);	140	help_cmd_ls(HELP_SHORT);
141	printf(" `%s' [path], if no path is given the current "	141	printf(" `%s' [path], if no path is given the current "
142	"working directory is used.\n", cmdname);	142	"working directory is used.\n", cmdname);
143	}	143	}
144		144
145	return CMD_VOID;	145	return CMD_VOID;
146	}	146	}
147		147
148	int * cmd_ls(char **argv)	148	int * cmd_ls(char **argv)
149	{	149	{
150	unsigned int argc;	150	unsigned int argc;
151	unsigned int scope;	151	unsigned int scope;
152	char *buff;	152	char *buff;
153	DIR *dirp;	153	DIR *dirp;
154		154
155	/* Count the arguments */	-
156	for (argc = 0; argv[argc] != NULL; argc ++);	155	argc = cli_count_args(argv);
157		156
158	buff = (char *) malloc(PATH_MAX);	157	buff = (char *) malloc(PATH_MAX);
159	if (NULL == buff) {	158	if (NULL == buff) {
160	cli_error(CL_ENOMEM, "%s: ", cmdname);	159	cli_error(CL_ENOMEM, "%s: ", cmdname);
161	return CMD_FAILURE;	160	return CMD_FAILURE;
162	}	161	}
163	memset(buff, 0, sizeof(buff));	162	memset(buff, 0, sizeof(buff));
164		163
165	if (argc == 1)	164	if (argc == 1)
166	getcwd(buff, PATH_MAX);	165	getcwd(buff, PATH_MAX);
167	else	166	else
168	strncpy(buff, argv[1], PATH_MAX);	167	strncpy(buff, argv[1], PATH_MAX);
169		168
170	scope = ls_scope(buff);	169	scope = ls_scope(buff);
171		170
172	switch (scope) {	171	switch (scope) {
173	case LS_BOGUS:	172	case LS_BOGUS:
174	cli_error(CL_ENOENT, buff);	173	cli_error(CL_ENOENT, buff);
175	free(buff);	174	free(buff);
176	return CMD_FAILURE;	175	return CMD_FAILURE;
177	case LS_FILE:	176	case LS_FILE:
178	ls_print_file(buff);	177	ls_print_file(buff);
179	break;	178	break;
180	case LS_DIR:	179	case LS_DIR:
181	dirp = opendir(buff);	180	dirp = opendir(buff);
182	if (! dirp) {	181	if (! dirp) {
183	/* May have been deleted between scoping it and opening it */	182	/* May have been deleted between scoping it and opening it */
184	cli_error(CL_EFAIL, "Could not stat %s", buff);	183	cli_error(CL_EFAIL, "Could not stat %s", buff);
185	free(buff);	184	free(buff);
186	return CMD_FAILURE;	185	return CMD_FAILURE;
187	}	186	}
188	ls_scan_dir(buff, dirp);	187	ls_scan_dir(buff, dirp);
189	closedir(dirp);	188	closedir(dirp);
190	break;	189	break;
191	}	190	}
192		191
193	free(buff);	192	free(buff);
194		193
195	return CMD_SUCCESS;	194	return CMD_SUCCESS;
196	}	195	}
197		196
198		197

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(root)/trunk/uspace/app/bdsh/cmds/modules/ls/ls.c – Rev 3364 → 3376