WebSVN – HelenOS – Diff – /trunk/uspace/app/bdsh/cmds/mod_cmds.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.
 */
 
/* NOTES:
 * module_* functions are pretty much identical to builtin_* functions at this
 * point. On the surface, it would appear that making each function dual purpose
 * would be economical.
 *
 * These are kept separate because the structures (module_t and builtin_t) may
 * grow apart and become rather different, even though they're identical at this
 * point.
 *
 * To keep things easy to hack, everything is separated. In reality this only adds
 * 6 - 8 extra functions, but keeps each function very easy to read and modify. */
 
/* TODO:
 * Many of these could be unsigned, provided the modules and builtins themselves
 * can follow suit. Long term goal. */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "errors.h"
#include "cmds.h"
#include "module_aliases.h"
 
extern volatile unsigned int cli_interactive;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
/* Checks if an entry function matching command exists in modules[], if so
 * its position in the array is returned */
int is_module(const char *command)
{
    module_t *mod;
    unsigned int i = 0;
 
    if (NULL == command)
        return -2;
 
    for (mod = modules; mod->name != NULL; mod++, i++) {
        if (!strcmp(mod->name, command))
            return i;
    }
 
    return -1;
}
 
/* Checks if a module is an alias (sharing an entry point with another
 * module). Returns 1 if so */
int is_module_alias(const char *command)
{
    unsigned int i = 0;
 
    if (NULL == command)
        return -1;
 
    for(i=0; mod_aliases[i] != NULL; i+=2) {
        if (!strcmp(mod_aliases[i], command))
            return 1;
    }
 
    return 0;
}
 
/* Returns the name of the module that an alias points to */
char *alias_for_module(const char *command)
{
    unsigned int i = 0;
 
    if (NULL == command)
        return (char *)NULL;
 
    for(i=0; mod_aliases[i] != NULL; i++) {
        if (!strcmp(mod_aliases[i], command))
            return (char *)mod_aliases[++i];
        i++;
    }
 
    return (char *)NULL;
}
 
 
/* Invokes the 'help' entry function for the module at position (int) module,
 * which wants an unsigned int to determine brief or extended display. */
int help_module(int module, unsigned int extended)
{
    module_t *mod = modules;
 
    mod += module;
 
    if (NULL != mod->help) {
        mod->help(extended);
        return CL_EOK;
    } else
        return CL_ENOENT;
}
 
/* Invokes the module entry point modules[module], passing argv[] as an argument
 * stack. */
int run_module(int module, char *argv[])
{
    module_t *mod = modules;
 
    mod += module;
 
    if (NULL != mod->entry)
        return ((int)mod->entry(argv));
 
    return CL_ENOENT;
}
 

Rev 3346	Rev 3809
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	/* NOTES:	31	/* NOTES:
32	* module_* functions are pretty much identical to builtin_* functions at this	32	* module_* functions are pretty much identical to builtin_* functions at this
33	* point. On the surface, it would appear that making each function dual purpose	33	* point. On the surface, it would appear that making each function dual purpose
34	* would be economical.	34	* would be economical.
35	*	35	*
36	* These are kept separate because the structures (module_t and builtin_t) may	36	* These are kept separate because the structures (module_t and builtin_t) may
37	* grow apart and become rather different, even though they're identical at this	37	* grow apart and become rather different, even though they're identical at this
38	* point.	38	* point.
39	*	39	*
40	* To keep things easy to hack, everything is separated. In reality this only adds	40	* To keep things easy to hack, everything is separated. In reality this only adds
41	* 6 - 8 extra functions, but keeps each function very easy to read and modify. */	41	* 6 - 8 extra functions, but keeps each function very easy to read and modify. */
42		42
43	/* TODO:	43	/* TODO:
44	* Many of these could be unsigned, provided the modules and builtins themselves	44	* Many of these could be unsigned, provided the modules and builtins themselves
45	* can follow suit. Long term goal. */	45	* can follow suit. Long term goal. */
46		46
47	#include <stdio.h>	47	#include <stdio.h>
48	#include <stdlib.h>	48	#include <stdlib.h>
49	#include <string.h>	49	#include <string.h>
50	#include "errors.h"	50	#include "errors.h"
51	#include "cmds.h"	51	#include "cmds.h"
52	#include "module_aliases.h"	52	#include "module_aliases.h"
53		53
54	extern volatile unsigned int cli_interactive;	54	extern volatile unsigned int cli_interactive;
55		55
56	int module_is_restricted(int pos)	-
57	{	-
58	/* Restriction Levels:	-
59	* -1 -> Available only in interactive mode	-
60	* 0 -> Available in any mode	-
61	* 1 -> Available only in non-interactive mode */	-
62		-
63	module_t *mod = modules;	-
64	mod += pos;	-
65	/* We're interactive, and the module is OK to run */	-
66	if (cli_interactive && mod->restricted <= 0)	-
67	return 0;	-
68	/* We're not interactive, and the module is OK to run */	-
69	if (!cli_interactive && mod->restricted >= 0)	-
70	return 0;	-
71		-
72	/* Anything else is just a big fat no :) */	-
73	return 1;	-
74	}	-
75		-
76	/* Checks if an entry function matching command exists in modules[], if so	56	/* Checks if an entry function matching command exists in modules[], if so
77	* its position in the array is returned */	57	* its position in the array is returned */
78	int is_module(const char *command)	58	int is_module(const char *command)
79	{	59	{
80	module_t *mod;	60	module_t *mod;
81	unsigned int i = 0;	61	unsigned int i = 0;
82		62
83	if (NULL == command)	63	if (NULL == command)
84	return -2;	64	return -2;
85		65
86	for (mod = modules; mod->name != NULL; mod++, i++) {	66	for (mod = modules; mod->name != NULL; mod++, i++) {
87	if (!strcmp(mod->name, command))	67	if (!strcmp(mod->name, command))
88	return i;	68	return i;
89	}	69	}
90		70
91	return -1;	71	return -1;
92	}	72	}
93		73
94	/* Checks if a module is an alias (sharing an entry point with another	74	/* Checks if a module is an alias (sharing an entry point with another
95	* module). Returns 1 if so */	75	* module). Returns 1 if so */
96	int is_module_alias(const char *command)	76	int is_module_alias(const char *command)
97	{	77	{
98	unsigned int i = 0;	78	unsigned int i = 0;
99		79
100	if (NULL == command)	80	if (NULL == command)
101	return -1;	81	return -1;
102		82
103	for(i=0; mod_aliases[i] != NULL; i+=2) {	83	for(i=0; mod_aliases[i] != NULL; i+=2) {
104	if (!strcmp(mod_aliases[i], command))	84	if (!strcmp(mod_aliases[i], command))
105	return 1;	85	return 1;
106	}	86	}
107		87
108	return 0;	88	return 0;
109	}	89	}
110		90
111	/* Returns the name of the module that an alias points to */	91	/* Returns the name of the module that an alias points to */
112	char alias_for_module(const char command)	92	char alias_for_module(const char command)
113	{	93	{
114	unsigned int i = 0;	94	unsigned int i = 0;
115		95
116	if (NULL == command)	96	if (NULL == command)
117	return (char *)NULL;	97	return (char *)NULL;
118		98
119	for(i=0; mod_aliases[i] != NULL; i++) {	99	for(i=0; mod_aliases[i] != NULL; i++) {
120	if (!strcmp(mod_aliases[i], command))	100	if (!strcmp(mod_aliases[i], command))
121	return (char *)mod_aliases[++i];	101	return (char *)mod_aliases[++i];
122	i++;	102	i++;
123	}	103	}
124		104
125	return (char *)NULL;	105	return (char *)NULL;
126	}	106	}
127		107
128		108
129	/* Invokes the 'help' entry function for the module at position (int) module,	109	/* Invokes the 'help' entry function for the module at position (int) module,
130	* which wants an unsigned int to determine brief or extended display. */	110	* which wants an unsigned int to determine brief or extended display. */
131	int help_module(int module, unsigned int extended)	111	int help_module(int module, unsigned int extended)
132	{	112	{
133	module_t *mod = modules;	113	module_t *mod = modules;
134		114
135	mod += module;	115	mod += module;
136		116
137	if (NULL != mod->help) {	117	if (NULL != mod->help) {
138	mod->help(extended);	118	mod->help(extended);
139	return CL_EOK;	119	return CL_EOK;
140	} else	120	} else
141	return CL_ENOENT;	121	return CL_ENOENT;
142	}	122	}
143		123
144	/* Invokes the module entry point modules[module], passing argv[] as an argument	124	/* Invokes the module entry point modules[module], passing argv[] as an argument
145	* stack. */	125	* stack. */
146	int run_module(int module, char *argv[])	126	int run_module(int module, char *argv[])
147	{	127	{
148	module_t *mod = modules;	128	module_t *mod = modules;
149		129
150	mod += module;	130	mod += module;
151		131
152	if (NULL != mod->entry)	132	if (NULL != mod->entry)
153	return ((int)mod->entry(argv));	133	return ((int)mod->entry(argv));
154		134
155	return CL_ENOENT;	135	return CL_ENOENT;
156	}	136	}
157		137

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(root)/trunk/uspace/app/bdsh/cmds/mod_cmds.c – Rev 3346 → 3809