diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 66 |
1 files changed, 39 insertions, 27 deletions
diff --git a/shell/hush.c b/shell/hush.c index b6e49db..683f9ba 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -155,6 +155,7 @@ typedef struct nommu_save_t { char **new_env; char **old_env; char **argv; + char **argv_from_re_execing; } nommu_save_t; #endif @@ -449,7 +450,6 @@ struct globals { char **global_argv; #if !BB_MMU char *argv0_for_re_execing; - char **argv_from_re_execing; #endif #if ENABLE_HUSH_LOOPS unsigned depth_break_continue; @@ -2280,9 +2280,7 @@ static char **expand_assignments(char **argv, int count) #if BB_MMU /* never called */ -void re_execute_shell(const char *s, char *argv0, char **argv); - -#define clean_up_after_re_execute() ((void)0) +void re_execute_shell(char ***to_free, const char *s, char *argv0, char **argv); static void reset_traps_to_defaults(void) { @@ -2314,8 +2312,8 @@ static void reset_traps_to_defaults(void) #else /* !BB_MMU */ -static void re_execute_shell(const char *s, char *g_argv0, char **g_argv) NORETURN; -static void re_execute_shell(const char *s, char *g_argv0, char **g_argv) +static void re_execute_shell(char ***to_free, const char *s, char *g_argv0, char **g_argv) NORETURN; +static void re_execute_shell(char ***to_free, const char *s, char *g_argv0, char **g_argv) { char param_buf[sizeof("-$%x:%x:%x:%x") + sizeof(unsigned) * 4]; char *heredoc_argv[4]; @@ -2357,7 +2355,7 @@ static void re_execute_shell(const char *s, char *g_argv0, char **g_argv) pp = g_argv; while (*pp++) cnt++; - G.argv_from_re_execing = argv = pp = xzalloc(sizeof(argv[0]) * cnt); + *to_free = 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) { @@ -2415,16 +2413,6 @@ static void re_execute_shell(const char *s, char *g_argv0, char **g_argv) xfunc_error_retval = 127; bb_error_msg_and_die("can't re-execute the shell"); } - -static void clean_up_after_re_execute(void) -{ - char **pp = G.argv_from_re_execing; - if (pp) { - /* Must match re_execute_shell's allocations (if any) */ - free(pp); - G.argv_from_re_execing = NULL; - } -} #endif /* !BB_MMU */ @@ -2436,6 +2424,9 @@ static void setup_heredoc(struct redir_struct *redir) /* the _body_ of heredoc (misleading field name) */ const char *heredoc = redir->rd_filename; char *expanded; +#if !BB_MMU + char **to_free; +#endif expanded = NULL; if (!(redir->rd_dup & HEREDOC_QUOTED)) { @@ -2490,12 +2481,14 @@ static void setup_heredoc(struct redir_struct *redir) /* Delegate blocking writes to another process */ disable_restore_tty_pgrp_on_exit(); xmove_fd(pair.wr, STDOUT_FILENO); - re_execute_shell(heredoc, NULL, NULL); + re_execute_shell(&to_free, heredoc, NULL, NULL); #endif } /* parent */ enable_restore_tty_pgrp_on_exit(); - clean_up_after_re_execute(); +#if !BB_MMU + free(to_free); +#endif close(pair.wr); free(expanded); wait(NULL); /* wait till child has died */ @@ -2742,8 +2735,16 @@ static struct function *new_function(char *name) return funcp; } -static void exec_function(const struct function *funcp, char **argv) NORETURN; -static void exec_function(const struct function *funcp, char **argv) +#if BB_MMU +#define exec_function(nommu_save, funcp, argv) \ + exec_function(funcp, argv) +#endif +static void exec_function(nommu_save_t *nommu_save, + const struct function *funcp, + char **argv) NORETURN; +static void exec_function(nommu_save_t *nommu_save, + const struct function *funcp, + char **argv) { # if BB_MMU int n = 1; @@ -2758,7 +2759,10 @@ static void exec_function(const struct function *funcp, char **argv) fflush(NULL); _exit(n); # else - re_execute_shell(funcp->body_as_string, G.global_argv[0], argv + 1); + re_execute_shell(&nommu_save->argv_from_re_execing, + funcp->body_as_string, + G.global_argv[0], + argv + 1); # endif } @@ -2889,7 +2893,7 @@ static void pseudo_exec_argv(nommu_save_t *nommu_save, { const struct function *funcp = find_function(argv[0]); if (funcp) { - exec_function(funcp, argv); + exec_function(nommu_save, funcp, argv); } } #endif @@ -2955,7 +2959,8 @@ static void pseudo_exec(nommu_save_t *nommu_save, * since this process is about to exit */ _exit(rcode); #else - re_execute_shell(command->group_as_string, + re_execute_shell(&nommu_save->argv_from_re_execing, + command->group_as_string, G.global_argv[0], G.global_argv + 1); #endif @@ -3432,6 +3437,7 @@ static int run_pipe(struct pipe *pi) nommu_save.new_env = NULL; nommu_save.old_env = NULL; nommu_save.argv = NULL; + nommu_save.argv_from_re_execing = NULL; #endif command = &(pi->cmds[i]); if (command->argv) { @@ -3489,8 +3495,8 @@ static int run_pipe(struct pipe *pi) enable_restore_tty_pgrp_on_exit(); #if !BB_MMU /* Clean up after vforked child */ - clean_up_after_re_execute(); free(nommu_save.argv); + free(nommu_save.argv_from_re_execing); free_strings_and_unsetenv(nommu_save.new_env, 1); putenv_all(nommu_save.old_env); /* Free the pointers, but the strings themselves @@ -4657,6 +4663,9 @@ static FILE *generate_stream_from_string(const char *s) { FILE *pf; int pid, channel[2]; +#if !BB_MMU + char **to_free; +#endif xpipe(channel); pid = BB_MMU ? fork() : vfork(); @@ -4688,7 +4697,8 @@ static FILE *generate_stream_from_string(const char *s) * huge=`cat BIG` # was blocking here forever * echo OK */ - re_execute_shell(s, + re_execute_shell(&to_free, + s, G.global_argv[0], G.global_argv + 1); #endif @@ -4696,7 +4706,9 @@ static FILE *generate_stream_from_string(const char *s) /* parent */ enable_restore_tty_pgrp_on_exit(); - clean_up_after_re_execute(); +#if !BB_MMU + free(to_free); +#endif close(channel[1]); pf = fdopen(channel[0], "r"); return pf; |