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util: make util_get_process_exec_path work on FreeBSD w/o procfs 

sysctl is the correct way of getting the current executable's path.
procfs is not mounted by default.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1598>
This commit is contained in:
Greg V 2020-04-09 01:41:00 +03:00 committed by Marge Bot
parent 1d9eda1b57
commit 98dbd01a96
1 changed files with 12 additions and 0 deletions
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12
src/util/u_process.c
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@ -44,6 +44,11 @@
#include <mach-o/dyld.h>
#endif
#if DETECT_OS_FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#if defined(__linux__) && defined(HAVE_PROGRAM_INVOCATION_NAME)
static char *path = NULL;
@ -202,6 +207,13 @@ util_get_process_exec_path(char* process_path, size_t len)
int result = _NSGetExecutablePath(process_path, &bufSize);
return (result == 0) ? strlen(process_path) : 0;
#elif DETECT_OS_FREEBSD
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
(void) sysctl(mib, 4, process_path, &len, NULL, 0);
process_path[len - 1] = '\0';
return len;
#elif DETECT_OS_UNIX
ssize_t r;