File: kdmctl.c

package info (click to toggle)
kde-workspace 4:4.11.13-2
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 67,756 kB
  • ctags: 47,705
  • sloc: cpp: 358,638; ansic: 34,695; xml: 5,231; perl: 1,598; sh: 1,307; ruby: 1,135; python: 651; asm: 566; makefile: 37
file content (233 lines) | stat: -rw-r--r-- 6,598 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
/*

KDM remote control application

Copyright (C) 2004 Oswald Buddenhagen <ossi@kde.org>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/

#include <config-workspace.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/socket.h>
#include <sys/un.h>

static int
openCtl(int fd, int err, const char *ctl, const char *dpy)
{
    struct sockaddr_un sa;

    sa.sun_family = AF_UNIX;
    if (dpy)
        snprintf(sa.sun_path, sizeof(sa.sun_path),
                 "%s/dmctl-%s/socket", ctl, dpy);
    else
        snprintf(sa.sun_path, sizeof(sa.sun_path),
                 "%s/dmctl/socket", ctl);
    if (!connect(fd, (struct sockaddr *)&sa, sizeof(sa)))
        return 1;
    if (err)
        fprintf(stderr, "Cannot connect socket '%s'.\n", sa.sun_path);
    return 0;
}

static const char *
readConfig(const char *cfg)
{
    FILE *fp;
    const char *ctl;
    char *ptr, *ptr2;
    char buf[1024];

    if (!(fp = fopen(cfg, "r"))) {
        fprintf(stderr,
                "Cannot open kdm config file '%s'.\n",
                cfg);
        return 0;
    }
    ctl = "/var/run/xdmctl";
    while (fgets(buf, sizeof(buf), fp))
        if (!strncmp(buf, "FifoDir", 7)) {
            ptr = buf + 7;
            while (*ptr && isspace(*ptr))
                ptr++;
            if (*ptr++ != '=')
                continue;
            while (*ptr && isspace(*ptr))
                ptr++;
            for (ptr2 = buf + strlen(buf);
                 ptr2 > ptr && isspace(*(ptr2 - 1));
                 ptr2--);
            *ptr2 = 0;
            ctl = strdup(ptr);
            break;
        }
    fclose(fp);
    return ctl;
}

static int
exe(int fd, const char *in, int len)
{
    char buf[4096];

    if (write(fd, in, len) != len) {
        fprintf(stderr, "Cannot send command\n");
        return 1;
    }
    do {
        if ((len = read(fd, buf, sizeof(buf))) <= 0) {
            fprintf(stderr, "Cannot receive reply\n");
            return 1;
        }
        fwrite(buf, 1, len, stdout);
    } while (buf[len - 1] != '\n');
    return 0;
}

static int
run(int fd, char **argv)
{
    unsigned len, l;
    char buf[1024];

    if (!*argv)
        return exe(fd, "caps\n", 5);
    if (!strcmp(*argv, "-")) {
        for (;;) {
            if (isatty(0)) {
                fputs("> ", stdout);
                fflush(stdout);
            }
            if (!fgets(buf, sizeof(buf), stdin))
                return 0;
            if (exe(fd, buf, strlen(buf)))
                return 1;
        }
    } else {
        len = strlen(*argv);
        if (len >= sizeof(buf))
            goto bad;
        memcpy(buf, *argv, len);
        while (*++argv) {
            l = strlen(*argv);
            if (len + l + 1 >= sizeof(buf))
                goto bad;
            buf[len++] = '\t';
            memcpy(buf + len, *argv, l);
            len += l;
        }
        buf[len++] = '\n';
        return exe(fd, buf, len);
      bad:
        fprintf(stderr, "Command too long\n");
        return 1;
    }
}

int
main(int argc, char **argv)
{
    char *dpy = getenv("DISPLAY");
    const char *ctl = getenv("DM_CONTROL");
    const char *cfg = KDE_DEBIAN_CONFDIR "/kdm/kdmrc";
    char *ptr;
    int fd;

    (void)argc;
    while (*++argv) {
        ptr = *argv;
        if (*ptr != '-' || !*(ptr + 1))
            break;
        ptr++;
        if (*ptr == '-')
            ptr++;
        if (!strcmp(ptr, "h") || !strcmp(ptr, "help")) {
            puts(
"Usage: kdmctl [options] [command [command arguments]]\n"
"\n"
"Options are:\n"
" -h -help     This help message.\n"
" -g -global   Use global control socket even if $DISPLAY is set\n"
" -d -display  Override $DISPLAY\n"
" -s -sockets  Override $DM_CONTROL\n"
" -c -config   Use alternative kdm config file\n"
"\n"
"The directory in which the sockets are located is determined this way:\n"
"- the -s option is examined\n"
"- the $DM_CONTROL variable is examined\n"
"- the kdm config file is searched for the FifoDir key\n"
"- /var/run/xdmctl and /var/run are tried\n"
"\n"
"If $DISPLAY is set (or -d was specified) and -g was not specified, the\n"
"display-specific control socket will be used, otherwise the global one.\n"
"\n"
"Tokens in the command and the reply are tab-separated.\n"
"Command arguments can be specified as separate command line parameters,\n"
"in which case they are simply concatenated with tabs in between.\n"
"\n"
"If the command is '-', kdmctl reads commands from stdin.\n"
"The default command is 'caps'.\n"
           );
            return 0;
        } else if (!strcmp(ptr, "g") || !strcmp(ptr, "global")) {
            dpy = 0;
        } else if (!strcmp(ptr, "d") || !strcmp(ptr, "display")) {
            if (!argv[1])
                goto needarg;
            dpy = *++argv;
        } else if (!strcmp(ptr, "s") || !strcmp(ptr, "sockets")) {
            if (!argv[1])
                goto needarg;
            ctl = *++argv;
        } else if (!strcmp(ptr, "c") || !strcmp(ptr, "config")) {
            if (!argv[1]) {
              needarg:
                fprintf(stderr, "Option '%s' needs argument.\n", ptr);
                return 1;
            }
            cfg = *++argv;
        } else {
            fprintf(stderr, "Unknown option '%s'.\n", ptr);
            return 1;
        }
    }
    if ((!ctl || !*ctl) && *cfg)
        ctl = readConfig(cfg);
    if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
        fprintf(stderr, "Cannot create UNIX socket\n");
        return 1;
    }
    if (dpy && (ptr = strchr(dpy, ':')) && (ptr = strchr(ptr, '.')))
        *ptr = 0;
    if (ctl && *ctl) {
        if (!openCtl(fd, 1, ctl, dpy))
            return 1;
    } else {
        if (!openCtl(fd, 0, "/var/run/xdmctl", dpy) &&
            !openCtl(fd, 0, "/var/run", dpy))
        {
            fprintf(stderr, "No command socket found.\n");
            return 1;
        }
    }
    return run(fd, argv);
}