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/* ISC license. */
#include <skalibs/sysdeps.h>
#if defined(SKALIBS_PROCSELFEXE) /* Linux, midipix, Solaris */
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
return sareadlink(sa, SKALIBS_PROCSELFEXE) ;
}
#elif defined(SKALIBS_HASKERNPROCPATHNAME) /* FreeBSD, NetBSD */
#include <skalibs/nonposix.h>
#ifdef __NetBSD__
#include <sys/param.h>
#endif
#include <limits.h>
#include <sys/sysctl.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 } ;
char buf[PATH_MAX] ;
size_t len = sizeof(buf) ;
if (sysctl(mib, 4, buf, &len, 0, 0) == -1) return -1 ;
if (!stralloc_catb(sa, buf, len) || !stralloc_0(sa)) return -1 ;
return 0 ;
}
#elif defined(SKALIBS_HAS_NSGETEXECUTABLEPATH) /* MacOS */
#include <skalibs/nonposix.h>
#include <sys/types.h>
#include <stdint.h>
#include <mach-o/dyld.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
char buf[4096] ;
uint32_t len = sizeof(buf) ;
if (_NSGetExecutablePath(buf, &len) == -1) return -1 ;
return sarealpath(sa, buf) ;
}
#elif defined(SKALIBS_HASGETAUXVAL) /* Hurd */
#include <skalibs/nonposix.h>
#include <sys/auxv.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
unsigned long x = getauxval(AT_EXECFN) ;
return sarealpath(sa, (char const *)x) ;
}
#elif defined(SKALIBS_HASDLADDR) /* hack that only works with dynamic binaries */
#include <skalibs/nonposix.h>
#include <dlfcn.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
extern int main () ;
int sagetexecname (stralloc *sa)
{
Dl_info info ;
if (!dladdr(&main, &info)) return -1 ;
if (!stralloc_cats(sa, info.dli_fname) || !stralloc_0(sa)) return -1 ;
return 0 ;
}
#elif defined(SKALIBS_HASGETEXECNAME) /* bad: it will probably give argv[0] */
#include <skalibs/nonposix.h>
#include <stdlib.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
return sarealpath(sa, getexecname()) ;
}
#else /* we tried */
#include <errno.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
int sagetexecname (stralloc *sa)
{
errno = ENOSYS ;
return -1 ;
}
#endif
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