WebSVN – HelenOS – Diff – /branches/dd/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 void ls_scan_dir(const char *d, DIR *dirp)
{
    struct dirent *dp;
    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);
        ls_print(dp->d_name, buff);
    }
 
    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(const char *name, const char *pathname)
{
    struct stat s;
    int rc;
 
    rc = stat(pathname, &s);
    if (rc != 0) {
        /* Odd chance it was deleted from the time readdir() found it */
        printf("ls: skipping bogus node %s\n", pathname);
        printf("rc=%d\n", rc);
        return;
    }
   
    if (s.is_file)
        printf("%-40s\t%llu\n", name, (long long) s.size);
    else
        printf("%-40s\n", name);
 
    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;
    struct stat s;
    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]);
 
    if (stat(buff, &s)) {
        cli_error(CL_ENOENT, buff);
        free(buff);
        return CMD_FAILURE;
    }
 
    if (s.is_file) {
        ls_print(buff, buff);
    } else {
        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);
    }
 
    free(buff);
 
    return CMD_SUCCESS;
}
 
 

Rev 4668	Rev 4688
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 void ls_scan_dir(const char d, DIR dirp)	53	static void ls_scan_dir(const char d, DIR dirp)
54	{	54	{
55	struct dirent *dp;	55	struct dirent *dp;
56	char *buff;	56	char *buff;
57		57
58	if (! dirp)	58	if (! dirp)
59	return;	59	return;
60		60
61	buff = (char *)malloc(PATH_MAX);	61	buff = (char *)malloc(PATH_MAX);
62	if (NULL == buff) {	62	if (NULL == buff) {
63	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);	63	cli_error(CL_ENOMEM, "ls: failed to scan %s", d);
64	return;	64	return;
65	}	65	}
66		66
67	while ((dp = readdir(dirp))) {	67	while ((dp = readdir(dirp))) {
68	memset(buff, 0, sizeof(buff));	68	memset(buff, 0, sizeof(buff));
69	/* Don't worry if inserting a double slash, this will be fixed by	69	/* Don't worry if inserting a double slash, this will be fixed by
70	* absolutize() later with subsequent calls to open() or readdir() */	70	* absolutize() later with subsequent calls to open() or readdir() */
71	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);	71	snprintf(buff, PATH_MAX - 1, "%s/%s", d, dp->d_name);
72	ls_print(dp->d_name, buff);	72	ls_print(dp->d_name, buff);
73	}	73	}
74		74
75	free(buff);	75	free(buff);
76		76
77	return;	77	return;
78	}	78	}
79		79
80	/* ls_print currently does nothing more than print the entry.	80	/* ls_print currently does nothing more than print the entry.
81	* in the future, we will likely pass the absolute path, and	81	* in the future, we will likely pass the absolute path, and
82	* some sort of ls_options structure that controls how each	82	* some sort of ls_options structure that controls how each
83	* entry is printed and what is printed about it.	83	* entry is printed and what is printed about it.
84	*	84	*
85	* Now we just print basic DOS style lists */	85	* Now we just print basic DOS style lists */
86		86
87	static void ls_print(const char name, const char pathname)	87	static void ls_print(const char name, const char pathname)
88	{	88	{
89	struct stat s;	89	struct stat s;
90	int rc;	90	int rc;
91		91
92	if (rc = stat(pathname, &s)) {	92	rc = stat(pathname, &s);
-		93	if (rc != 0) {
93	/* Odd chance it was deleted from the time readdir() found it */	94	/* Odd chance it was deleted from the time readdir() found it */
94	printf("ls: skipping bogus node %s\n", pathname);	95	printf("ls: skipping bogus node %s\n", pathname);
95	printf("rc=%d\n", rc);	96	printf("rc=%d\n", rc);
96	return;	97	return;
97	}	98	}
98		99
99	if (s.is_file)	100	if (s.is_file)
100	printf("%-40s\t%llu\n", name, (long long) s.size);	101	printf("%-40s\t%llu\n", name, (long long) s.size);
101	else	102	else
102	printf("%-40s\n", name);	103	printf("%-40s\n", name);
103		104
104	return;	105	return;
105	}	106	}
106		107
107	void help_cmd_ls(unsigned int level)	108	void help_cmd_ls(unsigned int level)
108	{	109	{
109	if (level == HELP_SHORT) {	110	if (level == HELP_SHORT) {
110	printf("`%s' lists files and directories.\n", cmdname);	111	printf("`%s' lists files and directories.\n", cmdname);
111	} else {	112	} else {
112	help_cmd_ls(HELP_SHORT);	113	help_cmd_ls(HELP_SHORT);
113	printf(" `%s' [path], if no path is given the current "	114	printf(" `%s' [path], if no path is given the current "
114	"working directory is used.\n", cmdname);	115	"working directory is used.\n", cmdname);
115	}	116	}
116		117
117	return;	118	return;
118	}	119	}
119		120
120	int cmd_ls(char **argv)	121	int cmd_ls(char **argv)
121	{	122	{
122	unsigned int argc;	123	unsigned int argc;
123	struct stat s;	124	struct stat s;
124	char *buff;	125	char *buff;
125	DIR *dirp;	126	DIR *dirp;
126		127
127	argc = cli_count_args(argv);	128	argc = cli_count_args(argv);
128		129
129	buff = (char *) malloc(PATH_MAX);	130	buff = (char *) malloc(PATH_MAX);
130	if (NULL == buff) {	131	if (NULL == buff) {
131	cli_error(CL_ENOMEM, "%s: ", cmdname);	132	cli_error(CL_ENOMEM, "%s: ", cmdname);
132	return CMD_FAILURE;	133	return CMD_FAILURE;
133	}	134	}
134	memset(buff, 0, sizeof(buff));	135	memset(buff, 0, sizeof(buff));
135		136
136	if (argc == 1)	137	if (argc == 1)
137	getcwd(buff, PATH_MAX);	138	getcwd(buff, PATH_MAX);
138	else	139	else
139	str_cpy(buff, PATH_MAX, argv[1]);	140	str_cpy(buff, PATH_MAX, argv[1]);
140		141
141	if (stat(buff, &s)) {	142	if (stat(buff, &s)) {
142	cli_error(CL_ENOENT, buff);	143	cli_error(CL_ENOENT, buff);
143	free(buff);	144	free(buff);
144	return CMD_FAILURE;	145	return CMD_FAILURE;
145	}	146	}
146		147
147	if (s.is_file) {	148	if (s.is_file) {
148	ls_print(buff, buff);	149	ls_print(buff, buff);
149	} else {	150	} else {
150	dirp = opendir(buff);	151	dirp = opendir(buff);
151	if (!dirp) {	152	if (!dirp) {
152	/* May have been deleted between scoping it and opening it */	153	/* May have been deleted between scoping it and opening it */
153	cli_error(CL_EFAIL, "Could not stat %s", buff);	154	cli_error(CL_EFAIL, "Could not stat %s", buff);
154	free(buff);	155	free(buff);
155	return CMD_FAILURE;	156	return CMD_FAILURE;
156	}	157	}
157	ls_scan_dir(buff, dirp);	158	ls_scan_dir(buff, dirp);
158	closedir(dirp);	159	closedir(dirp);
159	}	160	}
160		161
161	free(buff);	162	free(buff);
162		163
163	return CMD_SUCCESS;	164	return CMD_SUCCESS;
164	}	165	}
165		166
166		167

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(root)/branches/dd/uspace/app/bdsh/cmds/modules/ls/ls.c – Rev 4668 → 4688