diff options
| -rw-r--r-- | shell/README | 5 | ||||
| -rw-r--r-- | shell/hush.c | 28 |
2 files changed, 21 insertions, 12 deletions
diff --git a/shell/README b/shell/README index 32ad673..bcd84dc 100644 --- a/shell/README +++ b/shell/README @@ -1,5 +1,10 @@ Various bits of what is known about busybox shells, in no particular order. +2007-04-22 +hush: "sleep 1 | exit 3; echo $?" prints 0 because $? is substituted +_before_ pipe gets executed!! run_list_real() already has "pipe;echo" +parsed and handed to it for execution, so it sees "pipe"; "echo 0". + 2007-04-21 hush: removed setsid() and made job control sort-of-sometimes-work. Ctrl-C in "rm -i" works now except for SH_STANDALONE case. diff --git a/shell/hush.c b/shell/hush.c index c4b393b..db93f8d 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -1541,7 +1541,7 @@ static int run_pipe_real(struct pipe *pi) pi->running_progs++; - /* Second and next children need to know ipd of first one */ + /* Second and next children need to know pid of first one */ if (pi->pgrp < 0) pi->pgrp = child->pid; @@ -1612,7 +1612,7 @@ static int run_list_real(struct pipe *pi) skip_more_in_this_rmode = RES_XXXX; if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code; - if (rmode == RES_THEN && if_code) + if (rmode == RES_THEN && if_code) continue; if (rmode == RES_ELSE && !if_code) continue; @@ -2814,7 +2814,8 @@ static int parse_stream_outer(struct in_str *inp, int flag) ctx.type = flag; initialize_context(&ctx); update_ifs_map(); - if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) mapset(";$&|", 0); + if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) + mapset(";$&|", 0); inp->promptmode = 1; rcode = parse_stream(&temp, &ctx, inp, '\n'); if (rcode != 1 && ctx.old_flag != 0) { @@ -2832,7 +2833,7 @@ static int parse_stream_outer(struct in_str *inp, int flag) temp.nonnull = 0; temp.quote = 0; inp->p = NULL; - free_pipe_list(ctx.list_head,0); + free_pipe_list(ctx.list_head, 0); } b_free(&temp); } while (rcode != -1 && !(flag & FLAG_EXIT_FROM_LOOP)); /* loop on syntax errors, return on EOF */ @@ -2862,6 +2863,8 @@ static void setup_job_control(void) { pid_t shell_pgrp; + saved_task_pgrp = getpgrp(); + debug_printf("saved_task_pgrp=%d\n", saved_task_pgrp); fcntl(interactive_fd, F_SETFD, FD_CLOEXEC); /* Loop until we are in the foreground. */ @@ -2952,7 +2955,9 @@ int hush_main(int argc, char **argv) opt = parse_string_outer(optarg, FLAG_PARSE_SEMICOLON); goto final_return; case 'i': - /*interactive_fd++;*/ //huh?? + // Well, we cannot just declare interactiveness, + // we have to have some stuff (ctty, etc) + /*interactive_fd++;*/ break; case 'f': fake_mode++; @@ -2980,8 +2985,6 @@ int hush_main(int argc, char **argv) saved_tty_pgrp = tcgetpgrp(STDIN_FILENO); debug_printf("saved_tty_pgrp=%d\n", saved_tty_pgrp); if (saved_tty_pgrp >= 0) { - saved_task_pgrp = getpgrp(); - debug_printf("saved_task_pgrp=%d\n", saved_task_pgrp); /* try to dup to high fd#, >= 255 */ interactive_fd = fcntl(STDIN_FILENO, F_DUPFD, 255); if (interactive_fd < 0) { @@ -2991,17 +2994,14 @@ int hush_main(int argc, char **argv) /* give up */ interactive_fd = 0; } + // TODO: track & disallow any attempts of user + // to (inadvertently) close/redirect it } } debug_printf("\ninteractive_fd=%d\n", interactive_fd); if (interactive_fd) { /* Looks like they want an interactive shell */ -#if !ENABLE_FEATURE_SH_EXTRA_QUIET - printf( "\n\n%s hush - the humble shell v0.01 (testing)\n", - BB_BANNER); - printf( "Enter 'help' for a list of built-in commands.\n\n"); -#endif setup_job_control(); /* Make xfuncs do cleanup on exit */ die_sleep = -1; /* flag */ @@ -3009,6 +3009,10 @@ int hush_main(int argc, char **argv) /* xfunc has failed! die die die */ hush_exit(xfunc_error_retval); } +#if !ENABLE_FEATURE_SH_EXTRA_QUIET + printf("\n\n%s hush - the humble shell v0.02\n", BB_BANNER); + printf("Enter 'help' for a list of built-in commands.\n\n"); +#endif } if (argv[optind] == NULL) { |