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authorJes Sorensen <Jes.Sorensen@redhat.com>2010-06-10 11:42:23 +0200
committerBlue Swirl <blauwirbel@gmail.com>2010-06-12 08:49:14 +0300
commit6170540b824635a29eb7a0360affac9394c84c52 (patch)
tree8b5382efb78741da06f5f4f5284ffc255ef2de30 /os-posix.c
parent8d963e6ae700b2a46dd3a2bde5d1e5f925702f47 (diff)
downloadqemu-arm-6170540b824635a29eb7a0360affac9394c84c52.tar.gz
Move find_datadir to OS specific files.
This moves the win32 and POSIX versions of find_datadir() to OS specific files, and removes some #ifdef clutter from vl.c Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Acked-by: Juan Quintela <quintela@redhat.com> Acked-by: Richard Henderson <rth@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'os-posix.c')
-rw-r--r--os-posix.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/os-posix.c b/os-posix.c
index 01dbec2e36..621ad062b0 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -28,6 +28,7 @@
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <libgen.h>
/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"
@@ -66,3 +67,66 @@ void os_setup_signal_handling(void)
act.sa_flags = SA_NOCLDSTOP;
sigaction(SIGCHLD, &act, NULL);
}
+
+/* Find a likely location for support files using the location of the binary.
+ For installed binaries this will be "$bindir/../share/qemu". When
+ running from the build tree this will be "$bindir/../pc-bios". */
+#define SHARE_SUFFIX "/share/qemu"
+#define BUILD_SUFFIX "/pc-bios"
+char *os_find_datadir(const char *argv0)
+{
+ char *dir;
+ char *p = NULL;
+ char *res;
+ char buf[PATH_MAX];
+ size_t max_len;
+
+#if defined(__linux__)
+ {
+ int len;
+ len = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
+ if (len > 0) {
+ buf[len] = 0;
+ p = buf;
+ }
+ }
+#elif defined(__FreeBSD__)
+ {
+ static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
+ size_t len = sizeof(buf) - 1;
+
+ *buf = '\0';
+ if (!sysctl(mib, sizeof(mib)/sizeof(*mib), buf, &len, NULL, 0) &&
+ *buf) {
+ buf[sizeof(buf) - 1] = '\0';
+ p = buf;
+ }
+ }
+#endif
+ /* If we don't have any way of figuring out the actual executable
+ location then try argv[0]. */
+ if (!p) {
+ p = realpath(argv0, buf);
+ if (!p) {
+ return NULL;
+ }
+ }
+ dir = dirname(p);
+ dir = dirname(dir);
+
+ max_len = strlen(dir) +
+ MAX(strlen(SHARE_SUFFIX), strlen(BUILD_SUFFIX)) + 1;
+ res = qemu_mallocz(max_len);
+ snprintf(res, max_len, "%s%s", dir, SHARE_SUFFIX);
+ if (access(res, R_OK)) {
+ snprintf(res, max_len, "%s%s", dir, BUILD_SUFFIX);
+ if (access(res, R_OK)) {
+ qemu_free(res);
+ res = NULL;
+ }
+ }
+
+ return res;
+}
+#undef SHARE_SUFFIX
+#undef BUILD_SUFFIX