sys/kern/kern_exec.c

104 MALLOC_DEFINE(M_PARGS, "proc-args", "Process arguments");
119 static int do_execve(struct thread *td, struct image_args *args,
213 	struct image_args args;
220 	error = exec_copyin_args(&args, uap->fname, UIO_USERSPACE,
223 		error = kern_execve(td, &args, NULL, oldvmspace);
238 	struct image_args args;
245 	error = exec_copyin_args(&args, NULL, UIO_SYSSPACE,
248 		args.fd = uap->fd;
249 		error = kern_execve(td, &args, NULL, oldvmspace);
268 	struct image_args args;
275 	error = exec_copyin_args(&args, uap->fname, UIO_USERSPACE,
278 		error = kern_execve(td, &args, uap->mac_p, oldvmspace);
337 kern_execve(struct thread *td, struct image_args *args, struct mac *mac_p,
341 	AUDIT_ARG_ARGV(args->begin_argv, args->argc,
342 	    args->begin_envv - args->begin_argv);
343 	AUDIT_ARG_ENVV(args->begin_envv, args->envc,
344 	    args->endp - args->begin_envv);
345 	return (do_execve(td, args, mac_p, oldvmspace));
353 do_execve(struct thread *td, struct image_args *args, struct mac *mac_p,
405 	imgp->args = args;
422 	if (args->fname != NULL) {
424 		    | AUDITVNODE1, UIO_SYSSPACE, args->fname, td);
427 	SDT_PROBE1(proc, , , exec, args->fname);
430 	if (args->fname != NULL) {
450 		AUDIT_ARG_FD(args->fd);
454 		error = fgetvp_exec(td, args->fd,
577 	if (args->fname != NULL && args->fname[0] == '/')
578 		imgp->execpath = args->fname;
583 			imgp->execpath = args->fname;
632 		if (args->fname != NULL)
655 		args->fname = imgp->interpreter_name;
679 	 * Copy out strings (args and env) and initialize stack base
694 		suword(--stack_base, imgp->args->argc);
696 	if (args->fdp != NULL) {
698 		fdinstall_remapped(td, args->fdp);
699 		args->fdp = NULL;
714 	i = imgp->args->begin_envv - imgp->args->begin_argv;
718 		bcopy(imgp->args->begin_argv, newargs->ar_args, i);
746 	if (args->fname)
890 	SDT_PROBE1(proc, , , exec__success, args->fname);
901 		if (args->fname)
944 	exec_free_args(args);
1181 exec_copyin_args(struct image_args *args, char *fname,
1188 	bzero(args, sizeof(*args));
1196 	error = exec_alloc_args(args);
1204 		args->fname = args->buf;
1206 		    copystr(fname, args->fname, PATH_MAX, &length) :
1207 		    copyinstr(fname, args->fname, PATH_MAX, &length);
1213 	args->begin_argv = args->buf + length;
1214 	args->endp = args->begin_argv;
1215 	args->stringspace = ARG_MAX;
1228 		error = copyinstr((void *)(uintptr_t)argp, args->endp,
1229 		    args->stringspace, &length);
1235 		args->stringspace -= length;
1236 		args->endp += length;
1237 		args->argc++;
1240 	args->begin_envv = args->endp;
1255 			    args->endp, args->stringspace, &length);
1261 			args->stringspace -= length;
1262 			args->endp += length;
1263 			args->envc++;
1270 	exec_free_args(args);
1275 exec_copyin_data_fds(struct thread *td, struct image_args *args,
1283 	memset(args, '\0', sizeof(*args));
1287 	error = exec_alloc_args(args);
1291 	args->begin_argv = args->buf;
1292 	args->stringspace = ARG_MAX;
1300 		error = copyin(data, args->begin_argv, datalen);
1303 		args->begin_argv[datalen] = '\0';
1304 		args->endp = args->begin_argv + datalen + 1;
1305 		args->stringspace -= datalen + 1;
1311 		for (p = args->begin_argv; p < args->endp; ++p)
1313 				++args->argc;
1316 		args->endp = args->begin_argv;
1319 	args->begin_envv = args->endp;
1328 	error = fdcopy_remapped(ofdp, kfds, fdslen, &args->fdp);
1335 	exec_free_args(args);
1358 	mtx_init(&exec_args_kva_mtx, "exec args kva", NULL, MTX_DEF);
1452 exec_alloc_args(struct image_args *args)
1455 	args->buf = (char *)exec_alloc_args_kva(&args->bufkva);
1460 exec_free_args(struct image_args *args)
1463 	if (args->buf != NULL) {
1464 		exec_free_args_kva(args->bufkva);
1465 		args->buf = NULL;
1467 	if (args->fname_buf != NULL) {
1468 		free(args->fname_buf, M_TEMP);
1469 		args->fname_buf = NULL;
1471 	if (args->fdp != NULL)
1472 		fdescfree_remapped(args->fdp);
1549 	destp -= ARG_MAX - imgp->args->stringspace;
1566 	vectp -= imgp->args->argc + 1 + imgp->args->envc + 1;
1573 	stringp = imgp->args->begin_argv;
1574 	argc = imgp->args->argc;
1575 	envc = imgp->args->envc;
1580 	copyout(stringp, (void *)destp, ARG_MAX - imgp->args->stringspace);