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";
 
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;
}
 
void ls_print(const char *f)
{
    unsigned int scope;
 
    scope = ls_scope(f);
 
    /* If this function is called in a readdir loop, LS_BOGUS
     * can be treated as LS_FILE, since we aren't presenting
     * the full path to open(), just pointer->d_name as obtained
     * from opendir(). This will not happen if ../path/to/file
     * is passed, as may be the argument to ls */
 
    switch (scope) {
    case LS_DIR:
        printf("%-40s <DIR>\n", f);
        break;
    case LS_FILE:
        printf("%-40s\n", f);
        break;
    /* This is never reached unless in a readdir() loop */
    case LS_BOGUS:
        printf("%-40s\n", f);
        break;
    }
    return;
}
 
/* Dispays help for ls in various levels */
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;
    char s[PATH_MAX];
 
    DIR *dirp;
    struct dirent *dp;
 
    /* Count the arguments */
    for (argc = 0; argv[argc] != NULL; argc ++);
 
    if (argc > 2) {
        printf("%s - Too many arguments. Try `help %s extended'\n",
            cmdname, cmdname);
        return CMD_FAILURE;
    }
 
    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(buff);
        break;
    case LS_DIR:
        dirp = opendir(buff);
        while ((dp = readdir(dirp)))
            ls_print(dp->d_name);
        closedir(dirp);
        break;
    }
 
    free(buff);
 
    return CMD_SUCCESS;
   
}
 
 

Rev 3294	Rev 3309
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	unsigned int ls_scope(const char *path)	53	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	void ls_print(const char *f)	73	void ls_print(const char *f)
74	{	74	{
-		75	unsigned int scope;
-		76
75	if (ls_scope(f) == LS_FILE)	77	scope = ls_scope(f);
-		78
-		79	/* If this function is called in a readdir loop, LS_BOGUS
-		80	* can be treated as LS_FILE, since we aren't presenting
-		81	* the full path to open(), just pointer->d_name as obtained
-		82	* from opendir(). This will not happen if ../path/to/file
-		83	* is passed, as may be the argument to ls */
-		84
76	printf("%-40s\n", f);	85	switch (scope) {
77	else	86	case LS_DIR:
78	printf("%-40s <DIR>\n", f);	87	printf("%-40s <DIR>\n", f);
-		88	break;
-		89	case LS_FILE:
-		90	printf("%-40s\n", f);
-		91	break;
-		92	/* This is never reached unless in a readdir() loop */
-		93	case LS_BOGUS:
-		94	printf("%-40s\n", f);
-		95	break;
-		96	}
79	return;	97	return;
80	}	98	}
81		99
82	/* Dispays help for ls in various levels */	100	/* Dispays help for ls in various levels */
83	void * help_cmd_ls(unsigned int level)	101	void * help_cmd_ls(unsigned int level)
84	{	102	{
85	if (level == HELP_SHORT) {	103	if (level == HELP_SHORT) {
86	printf("`%s' lists files and directories.\n", cmdname);	104	printf("`%s' lists files and directories.\n", cmdname);
87	} else {	105	} else {
88	help_cmd_ls(HELP_SHORT);	106	help_cmd_ls(HELP_SHORT);
89	printf(" `%s' [path], if no path is given the current "	107	printf(" `%s' [path], if no path is given the current "
90	"working directory is used.\n", cmdname);	108	"working directory is used.\n", cmdname);
91	}	109	}
92		110
93	return CMD_VOID;	111	return CMD_VOID;
94	}	112	}
95		113
96	int * cmd_ls(char **argv)	114	int * cmd_ls(char **argv)
97	{	115	{
98	unsigned int argc;	116	unsigned int argc;
99	unsigned int scope;	117	unsigned int scope;
100	char *buff;	118	char *buff;
-		119	char s[PATH_MAX];
101		120
102	DIR *dirp;	121	DIR *dirp;
103	struct dirent *dp;	122	struct dirent *dp;
104		123
105	/* Count the arguments */	124	/* Count the arguments */
106	for (argc = 0; argv[argc] != NULL; argc ++);	125	for (argc = 0; argv[argc] != NULL; argc ++);
107		126
108	if (argc > 2) {	127	if (argc > 2) {
109	printf("%s - Too many arguments. Try `help %s extended'\n",	128	printf("%s - Too many arguments. Try `help %s extended'\n",
110	cmdname, cmdname);	129	cmdname, cmdname);
111	return CMD_FAILURE;	130	return CMD_FAILURE;
112	}	131	}
113		132
114	buff = (char *) malloc(PATH_MAX);	133	buff = (char *) malloc(PATH_MAX);
115	if (NULL == buff) {	134	if (NULL == buff) {
116	cli_error(CL_ENOMEM, "%s: ", cmdname);	135	cli_error(CL_ENOMEM, "%s: ", cmdname);
117	return CMD_FAILURE;	136	return CMD_FAILURE;
118	}	137	}
119	memset(buff, 0, sizeof(buff));	138	memset(buff, 0, sizeof(buff));
120		139
121	if (argc == 1)	140	if (argc == 1)
122	getcwd(buff, PATH_MAX);	141	getcwd(buff, PATH_MAX);
123	else	142	else
124	strncpy(buff, argv[1], PATH_MAX);	143	strncpy(buff, argv[1], PATH_MAX);
125		144
126	scope = ls_scope(buff);	145	scope = ls_scope(buff);
127		146
128	switch (scope) {	147	switch (scope) {
129	case LS_BOGUS:	148	case LS_BOGUS:
130	cli_error(CL_ENOENT, buff);	149	cli_error(CL_ENOENT, buff);
131	free(buff);	150	free(buff);
132	return CMD_FAILURE;	151	return CMD_FAILURE;
133	case LS_FILE:	152	case LS_FILE:
134	ls_print(buff);	153	ls_print(buff);
135	break;	154	break;
136	case LS_DIR:	155	case LS_DIR:
137	dirp = opendir(buff);	156	dirp = opendir(buff);
138	while ((dp = readdir(dirp)))	157	while ((dp = readdir(dirp)))
139	ls_print(dp->d_name);	158	ls_print(dp->d_name);
140	closedir(dirp);	159	closedir(dirp);
141	break;	160	break;
142	}	161	}
143		162
144	free(buff);	163	free(buff);
145		164
146	return CMD_SUCCESS;	165	return CMD_SUCCESS;
147		166
148	}	167	}
149		168
150		169

Subversion Repositories HelenOS

(root)/trunk/uspace/app/bdsh/cmds/modules/ls/ls.c @ 3834 – Rev 3294 → 3309