]>
Commit | Line | Data |
---|---|---|
93afd047 MT |
1 | |
2 | /* hwscan front end | |
3 | Copyright 2004 by SUSE (<adrian@suse.de>) */ | |
4 | ||
5 | #include <sys/types.h> | |
6 | #include <sys/stat.h> | |
7 | #include <sys/ipc.h> | |
8 | #include <sys/msg.h> | |
9 | #include <signal.h> | |
10 | #include <fcntl.h> | |
11 | #include <unistd.h> | |
12 | #include <stdlib.h> | |
13 | #include <string.h> | |
14 | #include <stdio.h> | |
15 | ||
16 | #include "init_message.h" | |
17 | ||
18 | int main( int argc, char **argv ) | |
19 | { | |
20 | int ret; | |
21 | unsigned short i; | |
22 | key_t key = KEY; | |
23 | int msgid; | |
24 | message m; | |
25 | char *device = argv[2]; | |
26 | ||
27 | if ( argc < 2 ){ | |
28 | fprintf( stderr, "help: hwscanqueue hwscan-commands\n" ); | |
29 | fprintf( stderr, "help: commands:\n" ); | |
30 | for ( i=0; i<NR_COMMANDS; i++ ){ | |
31 | fprintf( stderr, " --%s", command_args[i] ); | |
32 | if ( command_with_device[i] ) | |
33 | fprintf( stderr, " device" ); | |
34 | fprintf( stderr, "\n"); | |
35 | } | |
36 | fprintf( stderr, " --avail=yes/no id\n" ); | |
37 | fprintf( stderr, " --scan=device\n" ); | |
38 | fprintf( stderr, " --stop=device\n" ); | |
39 | exit(1); | |
40 | } | |
41 | ||
42 | if ( !strncmp("--cfg=", argv[1], 6) && argc>2 ) | |
43 | snprintf( m.mtext, MESSAGE_BUFFER, "C/sbin/hwscan %s %s", argv[1], argv[2] ); | |
44 | else if ( !strncmp("--avail=", argv[1], 8) && argc>2 ) | |
45 | snprintf( m.mtext, MESSAGE_BUFFER, "C/sbin/hwscan %s %s", argv[1], argv[2] ); | |
46 | else if ( !strncmp("--scan=", argv[1], 7) ) | |
47 | snprintf( m.mtext, MESSAGE_BUFFER, "A%s", argv[1]+7 ); | |
48 | else if ( !strncmp("--stop=", argv[1], 7) ) | |
49 | snprintf( m.mtext, MESSAGE_BUFFER, "R%s", argv[1]+7 ); | |
50 | else if ( !strncmp("--", argv[1], 2) ){ | |
51 | for ( i=0; i<NR_COMMANDS; i++ ){ | |
52 | if ( !strcmp(argv[1]+2,command_args[i]) ){ | |
53 | #if DEBUG | |
54 | printf("COMMAND %s\n", command_args[i] ); | |
55 | #endif | |
56 | snprintf( m.mtext, MESSAGE_BUFFER, "S%d", i ); | |
57 | if (command_with_device[i]){ | |
58 | if ( !device ){ | |
59 | fprintf(stderr, "need a device for this command\n"); | |
60 | exit(1); | |
61 | } | |
62 | strncat( m.mtext, device, MESSAGE_BUFFER-3 ); | |
63 | } | |
64 | break; | |
65 | } | |
66 | } | |
67 | if ( i>=NR_COMMANDS ){ | |
68 | fprintf(stderr, "unknown command\n"); | |
69 | exit(1); | |
70 | } | |
71 | }else | |
72 | exit(1); | |
73 | ||
74 | if ( (msgid = msgget(key, IPC_CREAT | 0600)) < 0 ){ | |
75 | perror("unable to init."); | |
76 | exit(1); | |
77 | } | |
78 | m.mtype = 1; | |
79 | ret = msgsnd( msgid, &m, MESSAGE_BUFFER, IPC_NOWAIT); | |
80 | #if DEBUG | |
81 | printf("SEND %s, return %d\n", m.mtext, ret ); | |
82 | #endif | |
83 | ||
84 | if ( ret < 0 ) | |
85 | perror("message send failed"); | |
86 | else{ | |
87 | // success ... start hwscand, if it is not yet running | |
88 | ssize_t r; | |
89 | char buffer[1024]; | |
90 | char link[1024]; | |
91 | int fd = open( PID_FILE, O_RDONLY ); | |
92 | if ( fd >= 0 && (r=read(fd,buffer,1023)) > 0 ){ | |
93 | close(fd); | |
94 | buffer[r]='\0'; | |
95 | snprintf(link, 1023, "/proc/%s/exe", buffer); | |
96 | if ( (r=readlink( link, buffer, 1023 )) > 0 ){ | |
97 | buffer[r]='\0'; | |
98 | if ( r<8 ) | |
99 | fd=-1; | |
100 | else if ( strcmp("/hwscand", buffer+strlen(buffer)-8) ) | |
101 | fd=-1; | |
102 | }else | |
103 | fd=-1; | |
104 | }else | |
105 | fd=-1; | |
106 | ||
107 | if ( fd < 0 ){ | |
108 | pid_t pid; | |
109 | signal(SIGCHLD,SIG_IGN); | |
110 | pid=fork(); | |
111 | if (pid==0){ | |
112 | /* Change directory to allow clean shut-down */ | |
113 | chdir("/"); | |
114 | /* Close std fds */ | |
115 | close(0); | |
116 | close(1); | |
117 | close(2); | |
118 | /* Start hwscand */ | |
119 | execve("/sbin/hwscand", 0, 0); | |
120 | } | |
121 | } | |
122 | } | |
123 | ||
124 | exit(ret); | |
125 | } | |
126 |