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subd: pass absolute path as argv[0].

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This means we print out the correct path with --debugger, which
can be vital if there are multiple binaries (eg. compiled vs installed).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-01-15 20:08:00 +10:30
parent 1950583612
commit c66df31674
1 changed files with 3 additions and 1 deletions
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4
lightningd/subd.c
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@ -154,6 +154,7 @@ static int subd(const char *dir, const char *name, const char *debug_subdaemon,
int fdnum = 3, i;
long max;
const char *debug_arg[2] = { NULL, NULL };
const char *path;
close(childmsg[0]);
close(execfail[0]);
@ -194,7 +195,8 @@ static int subd(const char *dir, const char *name, const char *debug_subdaemon,
if (debug_subdaemon && strends(name, debug_subdaemon))
debug_arg[debug_arg[0] ? 1 : 0] = "--debugger";
#endif
execl(path_join(NULL, dir, name), name, debug_arg[0], debug_arg[1], NULL);
path = path_join(NULL, dir, name);
execl(path, path, debug_arg[0], debug_arg[1], NULL);
child_errno_fail:
err = errno;