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1 office 1 /*
2 * src/utils.c Utilities
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation version 2.1
7 * of the License.
8 *
9 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
10 */
11  
12 /**
13 * @defgroup cli Command Line Interface API
14 *
15 * @{
16 */
17  
18 #include <netlink/cli/utils.h>
19  
20 uint32_t nl_cli_parse_u32(const char *arg)
21 {
22 unsigned long lval;
23 char *endptr;
24  
25 lval = strtoul(arg, &endptr, 0);
26 if (endptr == arg || lval == ULONG_MAX)
27 nl_cli_fatal(EINVAL, "Unable to parse \"%s\", not a number.",
28 arg);
29  
30 return (uint32_t) lval;
31 }
32  
33 void nl_cli_print_version(void)
34 {
35 printf("libnl tools version %s\n", LIBNL_VERSION);
36 printf(
37 "Copyright (C) 2003-2009 Thomas Graf <tgraf@redhat.com>\n"
38 "\n"
39 "This program comes with ABSOLUTELY NO WARRANTY. This is free \n"
40 "software, and you are welcome to redistribute it under certain\n"
41 "conditions. See the GNU General Public License for details.\n"
42 );
43  
44 exit(0);
45 }
46  
47 void nl_cli_fatal(int err, const char *fmt, ...)
48 {
49 va_list ap;
50  
51 fprintf(stderr, "Error: ");
52  
53 if (fmt) {
54 va_start(ap, fmt);
55 vfprintf(stderr, fmt, ap);
56 va_end(ap);
57 fprintf(stderr, "\n");
58 } else
59 fprintf(stderr, "%s\n", strerror(err));
60  
61 exit(abs(err));
62 }
63  
64 int nl_cli_connect(struct nl_sock *sk, int protocol)
65 {
66 int err;
67  
68 if ((err = nl_connect(sk, protocol)) < 0)
69 nl_cli_fatal(err, "Unable to connect netlink socket: %s",
70 nl_geterror(err));
71  
72 return err;
73 }
74  
75 struct nl_sock *nl_cli_alloc_socket(void)
76 {
77 struct nl_sock *sock;
78  
79 if (!(sock = nl_socket_alloc()))
80 nl_cli_fatal(ENOBUFS, "Unable to allocate netlink socket");
81  
82 return sock;
83 }
84  
85 struct nl_addr *nl_cli_addr_parse(const char *str, int family)
86 {
87 struct nl_addr *addr;
88 int err;
89  
90 if ((err = nl_addr_parse(str, family, &addr)) < 0)
91 nl_cli_fatal(err, "Unable to parse address \"%s\": %s",
92 str, nl_geterror(err));
93  
94 return addr;
95 }
96  
97 int nl_cli_parse_dumptype(const char *str)
98 {
99 if (!strcasecmp(str, "brief"))
100 return NL_DUMP_LINE;
101 else if (!strcasecmp(str, "details") || !strcasecmp(str, "detailed"))
102 return NL_DUMP_DETAILS;
103 else if (!strcasecmp(str, "stats"))
104 return NL_DUMP_STATS;
105 else if (!strcasecmp(str, "env"))
106 return NL_DUMP_ENV;
107 else
108 nl_cli_fatal(EINVAL, "Invalid dump type \"%s\".\n", str);
109  
110 return 0;
111 }
112  
113 int nl_cli_confirm(struct nl_object *obj, struct nl_dump_params *params,
114 int default_yes)
115 {
116 int answer;
117  
118 nl_object_dump(obj, params);
119 printf("Delete? (%c/%c) ",
120 default_yes ? 'Y' : 'y',
121 default_yes ? 'n' : 'N');
122  
123 do {
124 answer = tolower(getchar());
125 if (answer == '\n')
126 answer = default_yes ? 'y' : 'n';
127 } while (answer != 'y' && answer != 'n');
128  
129 return answer == 'y';
130 }
131  
132 struct nl_cache *nl_cli_alloc_cache(struct nl_sock *sock, const char *name,
133 int (*ac)(struct nl_sock *, struct nl_cache **))
134 {
135 struct nl_cache *cache;
136 int err;
137  
138 if ((err = ac(sock, &cache)) < 0)
139 nl_cli_fatal(err, "Unable to allocate %s cache: %s",
140 name, nl_geterror(err));
141  
142 nl_cache_mngt_provide(cache);
143  
144 return cache;
145 }
146  
147 /** @} */