4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 #include <sys/types.h>
33 /* Needed early for CONFIG_BSD etc. */
34 #include "config-host.h"
37 void os_setup_early_signal_handling(void)
40 sigfillset(&act
.sa_mask
);
42 act
.sa_handler
= SIG_IGN
;
43 sigaction(SIGPIPE
, &act
, NULL
);
46 static void termsig_handler(int signal
)
48 qemu_system_shutdown_request();
51 static void sigchld_handler(int signal
)
53 waitpid(-1, NULL
, WNOHANG
);
56 void os_setup_signal_handling(void)
60 memset(&act
, 0, sizeof(act
));
61 act
.sa_handler
= termsig_handler
;
62 sigaction(SIGINT
, &act
, NULL
);
63 sigaction(SIGHUP
, &act
, NULL
);
64 sigaction(SIGTERM
, &act
, NULL
);
66 act
.sa_handler
= sigchld_handler
;
67 act
.sa_flags
= SA_NOCLDSTOP
;
68 sigaction(SIGCHLD
, &act
, NULL
);
71 /* Find a likely location for support files using the location of the binary.
72 For installed binaries this will be "$bindir/../share/qemu". When
73 running from the build tree this will be "$bindir/../pc-bios". */
74 #define SHARE_SUFFIX "/share/qemu"
75 #define BUILD_SUFFIX "/pc-bios"
76 char *os_find_datadir(const char *argv0
)
84 #if defined(__linux__)
87 len
= readlink("/proc/self/exe", buf
, sizeof(buf
) - 1);
93 #elif defined(__FreeBSD__)
95 static int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PATHNAME
, -1};
96 size_t len
= sizeof(buf
) - 1;
99 if (!sysctl(mib
, sizeof(mib
)/sizeof(*mib
), buf
, &len
, NULL
, 0) &&
101 buf
[sizeof(buf
) - 1] = '\0';
106 /* If we don't have any way of figuring out the actual executable
107 location then try argv[0]. */
109 p
= realpath(argv0
, buf
);
117 max_len
= strlen(dir
) +
118 MAX(strlen(SHARE_SUFFIX
), strlen(BUILD_SUFFIX
)) + 1;
119 res
= qemu_mallocz(max_len
);
120 snprintf(res
, max_len
, "%s%s", dir
, SHARE_SUFFIX
);
121 if (access(res
, R_OK
)) {
122 snprintf(res
, max_len
, "%s%s", dir
, BUILD_SUFFIX
);
123 if (access(res
, R_OK
)) {