WebSVN – HelenOS – Diff – /branches/sparc/uspace/app/bdsh/cmds/modules/cat/cat.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 <getopt.h>
#include <string.h>
#include <fcntl.h>
 
#include "config.h"
#include "util.h"
#include "errors.h"
#include "entry.h"
#include "cat.h"
#include "cmds.h"
 
static char *cmdname = "cat";
#define CAT_VERSION "0.0.1"
#define CAT_DEFAULT_BUFLEN 1024
 
static char *cat_oops = "That option is not yet supported\n";
 
static struct option const long_options[] = {
    { "help", no_argument, 0, 'h' },
    { "version", no_argument, 0, 'v' },
    { "head", required_argument, 0, 'H' },
    { "tail", required_argument, 0, 't' },
    { "buffer", required_argument, 0, 'b' },
    { "more", no_argument, 0, 'm' },
    { 0, 0, 0, 0 }
};
 
/* Dispays help for cat in various levels */
void help_cmd_cat(unsigned int level)
{
    if (level == HELP_SHORT) {
        printf("`%s' shows the contents of files\n", cmdname);
    } else {
        help_cmd_cat(HELP_SHORT);
        printf(
        "Usage:  %s [options] <file1> [file2] [...]\n"
        "Options:\n"
        "  -h, --help       A short option summary\n"
        "  -v, --version    Print version information and exit\n"
        "  -H, --head ##    Print only the first ## bytes\n"
        "  -t, --tail ##    Print only the last ## bytes\n"
        "  -b, --buffer ##  Set the read buffer size to ##\n"
        "  -m, --more       Pause after each screen full\n"
        "Currently, %s is under development, some options don't work.\n",
        cmdname, cmdname);
    }
 
    return;
}
 
static unsigned int cat_file(const char *fname, size_t blen)
{
    int fd, bytes = 0, count = 0, reads = 0;
    off_t total = 0;
    char *buff = NULL;
 
    if (-1 == (fd = open(fname, O_RDONLY))) {
        printf("Unable to open %s\n", fname);
        return 1;
    }
 
    total = lseek(fd, 0, SEEK_END);
    lseek(fd, 0, SEEK_SET);
 
    if (NULL == (buff = (char *) malloc(blen + 1))) {
        close(fd);
        printf("Unable to allocate enough memory to read %s\n",
            fname);
        return 1;
    }
 
    do {
 
        bytes = read(fd, buff, blen);
        if (bytes > 0) {
            count += bytes;
 
            buff[bytes] = '\0';
            printf("%s", buff);
            reads++;
        }
    } while (bytes > 0);
 
    close(fd);
    if (bytes == -1) {
        printf("Error reading %s\n", fname);
        free(buff);
        return 1;
    }
 
    free(buff);
 
    return 0;
}
 
/* Main entry point for cat, accepts an array of arguments */
int cmd_cat(char **argv)
{
    unsigned int argc, i, ret = 0, buffer = 0;
    int c, opt_ind;
 
    argc = cli_count_args(argv);
 
    for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
        c = getopt_long(argc, argv, "hvmH:t:b:", long_options, &opt_ind);
        switch (c) {
        case 'h':
            help_cmd_cat(HELP_LONG);
            return CMD_SUCCESS;
        case 'v':
            printf("%s\n", CAT_VERSION);
            return CMD_SUCCESS;
        case 'H':
            printf(cat_oops);
            return CMD_FAILURE;
        case 't':
            printf(cat_oops);
            return CMD_FAILURE;
        case 'b':
            printf(cat_oops);
            break;
        case 'm':
            printf(cat_oops);
            return CMD_FAILURE;
        }
    }
 
    argc -= optind;
 
    if (argc < 1) {
        printf("%s - incorrect number of arguments. Try `%s --help'\n",
            cmdname, cmdname);
        return CMD_FAILURE;
    }
 
    if (buffer <= 0)
        buffer = CAT_DEFAULT_BUFLEN;
 
    for (i = optind; argv[i] != NULL; i++)
        ret += cat_file(argv[i], buffer);
 
    if (ret)
        return CMD_FAILURE;
    else
        return CMD_SUCCESS;
}
 
 

Rev 3492	Rev 3593
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 <getopt.h>	34	#include <getopt.h>
35	#include <string.h>	35	#include <string.h>
36	#include <fcntl.h>	36	#include <fcntl.h>
37		37
38	#include "config.h"	38	#include "config.h"
39	#include "util.h"	39	#include "util.h"
40	#include "errors.h"	40	#include "errors.h"
41	#include "entry.h"	41	#include "entry.h"
42	#include "cat.h"	42	#include "cat.h"
43	#include "cmds.h"	43	#include "cmds.h"
44		44
45	static char *cmdname = "cat";	45	static char *cmdname = "cat";
46	#define CAT_VERSION "0.0.1"	46	#define CAT_VERSION "0.0.1"
47	#define CAT_DEFAULT_BUFLEN 1024	47	#define CAT_DEFAULT_BUFLEN 1024
48		48
49	static char *cat_oops = "That option is not yet supported\n";	49	static char *cat_oops = "That option is not yet supported\n";
50		50
51	static struct option const long_options[] = {	51	static struct option const long_options[] = {
52	{ "help", no_argument, 0, 'h' },	52	{ "help", no_argument, 0, 'h' },
53	{ "version", no_argument, 0, 'v' },	53	{ "version", no_argument, 0, 'v' },
54	{ "head", required_argument, 0, 'H' },	54	{ "head", required_argument, 0, 'H' },
55	{ "tail", required_argument, 0, 't' },	55	{ "tail", required_argument, 0, 't' },
56	{ "buffer", required_argument, 0, 'b' },	56	{ "buffer", required_argument, 0, 'b' },
57	{ "more", no_argument, 0, 'm' },	57	{ "more", no_argument, 0, 'm' },
58	{ 0, 0, 0, 0 }	58	{ 0, 0, 0, 0 }
59	};	59	};
60		60
61	/* Dispays help for cat in various levels */	61	/* Dispays help for cat in various levels */
62	void help_cmd_cat(unsigned int level)	62	void help_cmd_cat(unsigned int level)
63	{	63	{
64	if (level == HELP_SHORT) {	64	if (level == HELP_SHORT) {
65	printf("`%s' shows the contents of files\n", cmdname);	65	printf("`%s' shows the contents of files\n", cmdname);
66	} else {	66	} else {
67	help_cmd_cat(HELP_SHORT);	67	help_cmd_cat(HELP_SHORT);
68	printf(	68	printf(
69	"Usage: %s [options] <file1> [file2] [...]\n"	69	"Usage: %s [options] <file1> [file2] [...]\n"
70	"Options:\n"	70	"Options:\n"
71	" -h, --help A short option summary\n"	71	" -h, --help A short option summary\n"
72	" -v, --version Print version information and exit\n"	72	" -v, --version Print version information and exit\n"
73	" -H, --head ## Print only the first ## bytes\n"	73	" -H, --head ## Print only the first ## bytes\n"
74	" -t, --tail ## Print only the last ## bytes\n"	74	" -t, --tail ## Print only the last ## bytes\n"
75	" -b, --buffer ## Set the read buffer size to ##\n"	75	" -b, --buffer ## Set the read buffer size to ##\n"
76	" -m, --more Pause after each screen full\n"	76	" -m, --more Pause after each screen full\n"
77	"Currently, %s is under development, some options don't work.\n",	77	"Currently, %s is under development, some options don't work.\n",
78	cmdname, cmdname);	78	cmdname, cmdname);
79	}	79	}
80		80
81	return;	81	return;
82	}	82	}
83		83
84	static unsigned int cat_file(const char *fname, size_t blen)	84	static unsigned int cat_file(const char *fname, size_t blen)
85	{	85	{
86	int fd, bytes = 0, count = 0, reads = 0;	86	int fd, bytes = 0, count = 0, reads = 0;
87	off_t total = 0;	87	off_t total = 0;
88	char *buff = NULL;	88	char *buff = NULL;
89		89
90	if (-1 == (fd = open(fname, O_RDONLY))) {	90	if (-1 == (fd = open(fname, O_RDONLY))) {
91	printf("Unable to open %s\n", fname);	91	printf("Unable to open %s\n", fname);
92	return 1;	92	return 1;
93	}	93	}
94		94
95	total = lseek(fd, 0, SEEK_END);	95	total = lseek(fd, 0, SEEK_END);
96	lseek(fd, 0, SEEK_SET);	96	lseek(fd, 0, SEEK_SET);
97		97
98	if (NULL == (buff = (char *) malloc(blen + 1))) {	98	if (NULL == (buff = (char *) malloc(blen + 1))) {
99	close(fd);	99	close(fd);
100	printf("Unable to allocate enough memory to read %s\n",	100	printf("Unable to allocate enough memory to read %s\n",
101	fname);	101	fname);
102	return 1;	102	return 1;
103	}	103	}
104		104
105	do {	105	do {
106	memset(buff, 0, sizeof(buff));	-
107	bytes = read(fd, buff, blen);	106	bytes = read(fd, buff, blen);
108	if (bytes > 0) {	107	if (bytes > 0) {
109	count += bytes;	108	count += bytes;
110	if (bytes < blen)	-
111	buff[bytes] = '\0';	109	buff[bytes] = '\0';
112	printf(buff);	110	printf("%s", buff);
113	reads++;	111	reads++;
114	}	112	}
115	} while (bytes > 0);	113	} while (bytes > 0);
116		114
117	close(fd);	115	close(fd);
118	if (bytes == -1) {	116	if (bytes == -1) {
119	printf("Error reading %s\n", fname);	117	printf("Error reading %s\n", fname);
120	free(buff);	118	free(buff);
121	return 1;	119	return 1;
122	}	120	}
123		121
124	free(buff);	122	free(buff);
125		123
126	return 0;	124	return 0;
127	}	125	}
128		126
129	/* Main entry point for cat, accepts an array of arguments */	127	/* Main entry point for cat, accepts an array of arguments */
130	int cmd_cat(char **argv)	128	int cmd_cat(char **argv)
131	{	129	{
132	unsigned int argc, i, ret = 0, buffer = 0;	130	unsigned int argc, i, ret = 0, buffer = 0;
133	int c, opt_ind;	131	int c, opt_ind;
134		132
135	argc = cli_count_args(argv);	133	argc = cli_count_args(argv);
136		134
137	for (c = 0, optind = 0, opt_ind = 0; c != -1;) {	135	for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
138	c = getopt_long(argc, argv, "hvmH:t:b:", long_options, &opt_ind);	136	c = getopt_long(argc, argv, "hvmH:t:b:", long_options, &opt_ind);
139	switch (c) {	137	switch (c) {
140	case 'h':	138	case 'h':
141	help_cmd_cat(HELP_LONG);	139	help_cmd_cat(HELP_LONG);
142	return CMD_SUCCESS;	140	return CMD_SUCCESS;
143	case 'v':	141	case 'v':
144	printf("%s\n", CAT_VERSION);	142	printf("%s\n", CAT_VERSION);
145	return CMD_SUCCESS;	143	return CMD_SUCCESS;
146	case 'H':	144	case 'H':
147	printf(cat_oops);	145	printf(cat_oops);
148	return CMD_FAILURE;	146	return CMD_FAILURE;
149	case 't':	147	case 't':
150	printf(cat_oops);	148	printf(cat_oops);
151	return CMD_FAILURE;	149	return CMD_FAILURE;
152	case 'b':	150	case 'b':
153	printf(cat_oops);	151	printf(cat_oops);
154	break;	152	break;
155	case 'm':	153	case 'm':
156	printf(cat_oops);	154	printf(cat_oops);
157	return CMD_FAILURE;	155	return CMD_FAILURE;
158	}	156	}
159	}	157	}
160		158
161	argc -= optind;	159	argc -= optind;
162		160
163	if (argc < 1) {	161	if (argc < 1) {
164	printf("%s - incorrect number of arguments. Try `%s --help'\n",	162	printf("%s - incorrect number of arguments. Try `%s --help'\n",
165	cmdname, cmdname);	163	cmdname, cmdname);
166	return CMD_FAILURE;	164	return CMD_FAILURE;
167	}	165	}
168		166
169	if (buffer <= 0)	167	if (buffer <= 0)
170	buffer = CAT_DEFAULT_BUFLEN;	168	buffer = CAT_DEFAULT_BUFLEN;
171		169
172	for (i = optind; argv[i] != NULL; i++)	170	for (i = optind; argv[i] != NULL; i++)
173	ret += cat_file(argv[i], buffer);	171	ret += cat_file(argv[i], buffer);
174		172
175	if (ret)	173	if (ret)
176	return CMD_FAILURE;	174	return CMD_FAILURE;
177	else	175	else
178	return CMD_SUCCESS;	176	return CMD_SUCCESS;
179	}	177	}
180		178
181		179

Subversion Repositories HelenOS

(root)/branches/sparc/uspace/app/bdsh/cmds/modules/cat/cat.c – Rev 3492 → 3593