diff options
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/hush.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/shell/hush.c b/shell/hush.c index 9920e98..3959da1 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2180,10 +2180,21 @@ static void re_execute_shell(const char *s, int is_heredoc) NORETURN; static void re_execute_shell(const char *s, int is_heredoc) { char param_buf[sizeof("-$%x:%x:%x:%x") + sizeof(unsigned) * 4]; + char *heredoc_argv[4]; struct variable *cur; char **argv, **pp, **pp2; unsigned cnt; + if (is_heredoc) { + argv = heredoc_argv; + argv[0] = (char *) G.argv0_for_re_execing; + argv[1] = (char *) "-<"; + argv[2] = (char *) s; + argv[3] = NULL; + pp = &argv[3]; /* used as pointer to empty environmaent */ + goto do_exec; + } + sprintf(param_buf, "-$%x:%x:%x" USE_HUSH_LOOPS(":%x") , (unsigned) G.root_pid , (unsigned) G.last_bg_pid @@ -2198,7 +2209,7 @@ static void re_execute_shell(const char *s, int is_heredoc) if (!cur->flg_export || cur->flg_read_only) cnt += 2; } - G.argv_from_re_execing = pp = xzalloc(sizeof(argv[0]) * cnt); + G.argv_from_re_execing = argv = pp = xzalloc(sizeof(argv[0]) * cnt); *pp++ = (char *) G.argv0_for_re_execing; *pp++ = param_buf; for (cur = G.top_var; cur; cur = cur->next) { @@ -2232,22 +2243,21 @@ static void re_execute_shell(const char *s, int is_heredoc) * I conclude it means we don't need to pass active traps here. * exec syscall below resets them to SIG_DFL for us. */ - *pp++ = (char *) (is_heredoc ? "-<" : "-c"); + *pp++ = (char *) "-c"; *pp++ = (char *) s; pp2 = G.global_argv; while (*pp2) *pp++ = *pp2++; /* *pp = NULL; - is already there */ + pp = environ; + do_exec: debug_printf_exec("re_execute_shell pid:%d cmd:'%s'\n", getpid(), s); sigprocmask(SIG_SETMASK, &G.inherited_set, NULL); - execve(bb_busybox_exec_path, - G.argv_from_re_execing, - (is_heredoc ? pp /* points to NULL ptr */ : environ) - ); + execve(bb_busybox_exec_path, argv, pp); /* Fallback. Useful for init=/bin/hush usage etc */ - if (G.argv0_for_re_execing[0] == '/') - execv(G.argv0_for_re_execing, G.argv_from_re_execing); + if (argv[0][0] == '/') + execve(argv[0], argv, pp); xfunc_error_retval = 127; bb_error_msg_and_die("can't re-execute the shell"); } @@ -2281,6 +2291,7 @@ static void setup_heredoc(struct redir_struct *redir) } len = strlen(heredoc); + close(redir->rd_fd); /* often saves dup2+close in xmove_fd */ xpiped_pair(pair); xmove_fd(pair.rd, redir->rd_fd); |