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/* vim: set sw=4 ts=4 sts=4 et: */
#include "l4sysdep.h"
#include "l4posix.h"
#include "l4str.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#ifdef __FreeBSD__
# include <sys/sysctl.h>
#endif
char* lbs_sysdep_get_executable (void) {
char* myexec;
#ifdef __FreeBSD__
int fb_mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
int fb_rval;
size_t fb_size = 256;
myexec = malloc (fb_size);
while ((fb_rval = sysctl (fb_mib, 4, myexec, &fb_size, NULL, 0)) < 0 &&
errno == ENOMEM) {
fb_size *= 2;
myexec = realloc (myexec, fb_size);
}
if (fb_rval >= 0) {
return myexec;
} else {
free (myexec);
}
#endif
if ((myexec = lbs_posix_readlink ("/proc/self/exe")) != NULL) {
return myexec;
}
if ((myexec = lbs_posix_readlink ("/proc/curproc/exe")) != NULL) {
return myexec;
}
if ((myexec = lbs_posix_readlink ("/proc/curproc/file")) != NULL) {
return myexec;
}
return NULL;
}
char* lbs_sysdep_get_resource (const char* filename) {
char *myexec, *myres;
bool myexec_static = false;
myexec = lbs_sysdep_get_executable ();
if (myexec == NULL) {
myexec = lbs_posix_getcwd ();
if (myexec == NULL) {
myexec = "./";
myexec_static = true;
}
} else {
char* dirsep = strrchr (myexec, '/');
if (dirsep != NULL && dirsep != myexec) {
*dirsep = '\0';
}
}
if (lbs_str_has_suffix (myexec, "/")) {
myres = lbs_posix_strcat (myexec, filename, (char*)NULL);
} else {
myres = lbs_posix_strcat (myexec, "/", filename, (char*)NULL);
}
if (!myexec_static) {
free (myexec);
}
return myres;
}
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