WebSVN – HelenOS – Diff – /trunk/uspace/app/bdsh/cmds/builtins/cd/cd.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 <string.h>
#include <errno.h>
 
#include "util.h"
#include "errors.h"
#include "entry.h"
#include "cmds.h"
#include "cd.h"
 
static char * cmdname = "cd";
 
void * help_cmd_cd(unsigned int level)
{
    if (level == HELP_SHORT) {
        printf("`%s' changes the current working directory.\n", cmdname);
    } else {
        printf(
        "  %s <directory>\n"
        "  Change directory to <directory>, e.g `%s /sbin'\n",
            cmdname, cmdname);
    }
 
    return CMD_VOID;
}
 
/* This is a very rudamentary 'cd' command. It is not 'link smart' (yet) */
 
int * cmd_cd(char **argv, cliuser_t *usr)
{
    int argc, rc = 0;
 
    argc = cli_count_args(argv);
 
    /* We don't yet play nice with whitespace, a getopt implementation should
     * protect "quoted\ destination" as a single argument. Its not our job to
     * look for && || or redirection as the tokenizer should have done that
     * (currently, it does not) */
 
    if (argc > 2) {
        cli_error(CL_EFAIL, "Too many arguments to `%s'", cmdname);
        return CMD_FAILURE;
    }
 
    if (argc < 2) {
        printf("%s - no directory specified. Try `help %s extended'\n",
            cmdname, cmdname);
        return CMD_FAILURE;
    }
 
    /* We have the correct # of arguments
     * TODO: handle tidle (~) expansion? */
 
    rc = chdir(argv[1]);
 
    if (rc == 0) {
        return CMD_SUCCESS;
    } else {
        switch (rc) {
        case ENOMEM:
            cli_error(CL_EFAIL, "Destination path too long");
            break;
        case ENOENT:
            cli_error(CL_ENOENT, "Invalid directory `%s'", argv[1]);
            break;
        default:
            cli_error(CL_EFAIL, "Unable to change to `%s'", argv[1]);
            break;
        }
    }
 
    return CMD_FAILURE;
}
 

Rev 3346	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 <string.h>	34	#include <string.h>
35	#include <errno.h>	35	#include <errno.h>
36		36
37	#include "util.h"	37	#include "util.h"
38	#include "errors.h"	38	#include "errors.h"
39	#include "entry.h"	39	#include "entry.h"
40	#include "cmds.h"	40	#include "cmds.h"
41	#include "cd.h"	41	#include "cd.h"
42		42
43	static char * cmdname = "cd";	43	static char * cmdname = "cd";
44		44
45	void * help_cmd_cd(unsigned int level)	45	void * help_cmd_cd(unsigned int level)
46	{	46	{
47	if (level == HELP_SHORT) {	47	if (level == HELP_SHORT) {
48	printf("`%s' changes the current working directory.\n", cmdname);	48	printf("`%s' changes the current working directory.\n", cmdname);
49	} else {	49	} else {
50	printf(	50	printf(
51	" %s <directory>\n"	51	" %s <directory>\n"
52	" Change directory to <directory>, e.g `%s /sbin'\n",	52	" Change directory to <directory>, e.g `%s /sbin'\n",
53	cmdname, cmdname);	53	cmdname, cmdname);
54	}	54	}
55		55
56	return CMD_VOID;	56	return CMD_VOID;
57	}	57	}
58		58
59	/* This is a very rudamentary 'cd' command. It is not 'link smart' (yet) */	59	/* This is a very rudamentary 'cd' command. It is not 'link smart' (yet) */
60		60
61	int * cmd_cd(char *argv, cliuser_t usr)	61	int * cmd_cd(char *argv, cliuser_t usr)
62	{	62	{
63	int argc, rc = 0;	63	int argc, rc = 0;
64		64
65	for (argc = 0; argv[argc] != NULL; argc ++);	65	argc = cli_count_args(argv);
66		66
67	/* We don't yet play nice with whitespace, a getopt implementation should	67	/* We don't yet play nice with whitespace, a getopt implementation should
68	* protect "quoted\ destination" as a single argument. Its not our job to	68	* protect "quoted\ destination" as a single argument. Its not our job to
69	* look for && \|\| or redirection as the tokenizer should have done that	69	* look for && \|\| or redirection as the tokenizer should have done that
70	* (currently, it does not) */	70	* (currently, it does not) */
71		71
72	if (argc > 2) {	72	if (argc > 2) {
73	cli_error(CL_EFAIL, "Too many arguments to `%s'", cmdname);	73	cli_error(CL_EFAIL, "Too many arguments to `%s'", cmdname);
74	return CMD_FAILURE;	74	return CMD_FAILURE;
75	}	75	}
76		76
77	if (argc < 2) {	77	if (argc < 2) {
78	printf("%s - no directory specified. Try `help %s extended'\n",	78	printf("%s - no directory specified. Try `help %s extended'\n",
79	cmdname, cmdname);	79	cmdname, cmdname);
80	return CMD_FAILURE;	80	return CMD_FAILURE;
81	}	81	}
82		82
83	/* We have the correct # of arguments	83	/* We have the correct # of arguments
84	* TODO: handle tidle (~) expansion? */	84	* TODO: handle tidle (~) expansion? */
85		85
86	rc = chdir(argv[1]);	86	rc = chdir(argv[1]);
87		87
88	if (rc == 0) {	88	if (rc == 0) {
89	return CMD_SUCCESS;	89	return CMD_SUCCESS;
90	} else {	90	} else {
91	switch (rc) {	91	switch (rc) {
92	case ENOMEM:	92	case ENOMEM:
93	cli_error(CL_EFAIL, "Destination path too long");	93	cli_error(CL_EFAIL, "Destination path too long");
94	break;	94	break;
95	case ENOENT:	95	case ENOENT:
96	cli_error(CL_ENOENT, "Invalid directory `%s'", argv[1]);	96	cli_error(CL_ENOENT, "Invalid directory `%s'", argv[1]);
97	break;	97	break;
98	default:	98	default:
99	cli_error(CL_EFAIL, "Unable to change to `%s'", argv[1]);	99	cli_error(CL_EFAIL, "Unable to change to `%s'", argv[1]);
100	break;	100	break;
101	}	101	}
102	}	102	}
103		103
104	return CMD_FAILURE;	104	return CMD_FAILURE;
105	}	105	}
106		106

Subversion Repositories HelenOS

(root)/trunk/uspace/app/bdsh/cmds/builtins/cd/cd.c – Rev 3346 → 3376