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backtrace: Try to find absolute executable path

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This allows us to get backtraces from test_runner which does not start
iwd from a current working directory that is a parent of the iwd
executable.
This commit is contained in:
Denis Kenzior 2017-03-16 15:13:35 -05:00
parent 44f23e7a5f
commit 2e820abea1
3 changed files with 24 additions and 5 deletions
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25
src/backtrace.c
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@ -156,14 +156,33 @@ static void signal_handler(int signo)
exit(EXIT_FAILURE);
}
void __iwd_backtrace_init(const char *program)
void __iwd_backtrace_init()
{
static char path[PATH_MAX];
static char cwd[PATH_MAX];
struct sigaction sa;
sigset_t mask;
ssize_t len;
program_exec = program;
program_path = getcwd(path, sizeof(path));
/* Attempt to get the full path to our executable */
len = readlink("/proc/self/exe", path, sizeof(path) - 1);
if (len > 0) {
int i;
path[len] = '\0';
for (i = len - 1; i >= 0; i--) {
if (path[i] != '/')
continue;
program_exec = path;
break;
}
}
if (program_exec == NULL)
return;
program_path = getcwd(cwd, sizeof(cwd));
sigemptyset(&mask);
sa.sa_handler = signal_handler;

2
src/backtrace.h
View File

@ -20,6 +20,6 @@
*
*/
#ifdef __GLIBC__
void __iwd_backtrace_init(const char *program);
void __iwd_backtrace_init();
void __iwd_backtrace_print(unsigned int offset);
#endif

2
src/main.c
View File

@ -197,7 +197,7 @@ int main(int argc, char *argv[])
l_debug_enable("*");
#ifdef __GLIBC__
__iwd_backtrace_init(argv[0]);
__iwd_backtrace_init();
#endif
l_info("Wireless daemon version %s", VERSION);