diff options
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/hush.c | 76 | ||||
| -rwxr-xr-x | shell/hush_test/hush-z_slow/leak_all1.tests | 9 |
2 files changed, 47 insertions, 38 deletions
diff --git a/shell/hush.c b/shell/hush.c index 0890f09..d1f674e 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -904,30 +904,20 @@ static char **xx_add_string_to_strings(int lineno, char **strings, char *add) xx_add_string_to_strings(__LINE__, strings, add) #endif -static int unset_local_var(const char *name); - -static void free_strings_and_unset(char **strings, int unset) +static void free_strings(char **strings) { char **v; if (!strings) return; - v = strings; while (*v) { - if (unset) { - unset_local_var(*v); - } - free(*v++); + free(*v); + v++; } free(strings); } -static void free_strings(char **strings) -{ - free_strings_and_unset(strings, 0); -} - /* Helpers for setting new $n and restoring them back */ @@ -1340,25 +1330,21 @@ static int set_local_var(char *str, int flg_export, int flg_read_only) return 0; } -static int unset_local_var(const char *name) +static int unset_local_var_len(const char *name, int name_len) { struct variable *cur; - struct variable *prev = prev; /* for gcc */ - int name_len; + struct variable **var_pp; if (!name) return EXIT_SUCCESS; - name_len = strlen(name); - cur = G.top_var; - while (cur) { + var_pp = &G.top_var; + while ((cur = *var_pp) != NULL) { if (strncmp(cur->varstr, name, name_len) == 0 && cur->varstr[name_len] == '=') { if (cur->flg_read_only) { bb_error_msg("%s: readonly variable", name); return EXIT_FAILURE; } - /* prev is ok to use here because 1st variable, HUSH_VERSION, - * is ro, and we cannot reach this code on the 1st pass */ - prev->next = cur->next; + *var_pp = cur->next; debug_printf_env("%s: unsetenv '%s'\n", __func__, cur->varstr); bb_unsetenv(cur->varstr); if (name_len == 3 && cur->varstr[0] == 'P' && cur->varstr[1] == 'S') @@ -1368,12 +1354,31 @@ static int unset_local_var(const char *name) free(cur); return EXIT_SUCCESS; } - prev = cur; - cur = cur->next; + var_pp = &cur->next; } return EXIT_SUCCESS; } +static int unset_local_var(const char *name) +{ + return unset_local_var_len(name, strlen(name)); +} + +static void unset_vars(char **strings) +{ + char **v; + + if (!strings) + return; + v = strings; + while (*v) { + const char *eq = strchrnul(*v, '='); + unset_local_var_len(*v, (int)(eq - *v)); + v++; + } + free(strings); +} + #if ENABLE_SH_MATH_SUPPORT #define is_name(c) ((c) == '_' || isalpha((unsigned char)(c))) #define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c))) @@ -1411,13 +1416,17 @@ static void add_vars(struct variable *var) next = var->next; var->next = G.top_var; G.top_var = var; - if (var->flg_export) + if (var->flg_export) { + debug_printf_env("%s: restoring exported '%s'\n", __func__, var->varstr); putenv(var->varstr); + } else { + debug_printf_env("%s: restoring local '%s'\n", __func__, var->varstr); + } var = next; } } -static struct variable *set_vars_all_and_save_old(char **strings) +static struct variable *set_vars_and_save_old(char **strings) { char **s; struct variable *old = NULL; @@ -1438,6 +1447,7 @@ static struct variable *set_vars_all_and_save_old(char **strings) if (var_pp) { /* Remove variable from global linked list */ var_p = *var_pp; + debug_printf_env("%s: removing '%s'\n", __func__, var_p->varstr); *var_pp = var_p->next; /* Add it to returned list */ var_p->next = old; @@ -3021,13 +3031,13 @@ static void pseudo_exec_argv(nommu_save_t *nommu_save, new_env = expand_assignments(argv, assignment_cnt); #if BB_MMU - set_vars_all_and_save_old(new_env); + set_vars_and_save_old(new_env); free(new_env); /* optional */ - /* we can also destroy set_vars_all_and_save_old's return value, + /* we can also destroy set_vars_and_save_old's return value, * to save memory */ #else nommu_save->new_env = new_env; - nommu_save->old_vars = set_vars_all_and_save_old(new_env); + nommu_save->old_vars = set_vars_and_save_old(new_env); #endif if (argv_expanded) { argv = argv_expanded; @@ -3554,7 +3564,7 @@ static int run_pipe(struct pipe *pi) rcode = setup_redirects(command, squirrel); if (rcode == 0) { new_env = expand_assignments(argv, command->assignment_cnt); - old_vars = set_vars_all_and_save_old(new_env); + old_vars = set_vars_and_save_old(new_env); if (!funcp) { debug_printf_exec(": builtin '%s' '%s'...\n", x->cmd, argv_expanded[1]); @@ -3573,7 +3583,7 @@ static int run_pipe(struct pipe *pi) clean_up_and_ret: #endif restore_redirects(squirrel); - free_strings_and_unset(new_env, 1); + unset_vars(new_env); add_vars(old_vars); clean_up_and_ret1: free(argv_expanded); @@ -3589,7 +3599,7 @@ static int run_pipe(struct pipe *pi) rcode = setup_redirects(command, squirrel); if (rcode == 0) { new_env = expand_assignments(argv, command->assignment_cnt); - old_vars = set_vars_all_and_save_old(new_env); + old_vars = set_vars_and_save_old(new_env); debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", argv_expanded[0], argv_expanded[1]); rcode = run_nofork_applet(i, argv_expanded); @@ -3687,7 +3697,7 @@ static int run_pipe(struct pipe *pi) /* Clean up after vforked child */ free(nommu_save.argv); free(nommu_save.argv_from_re_execing); - free_strings_and_unset(nommu_save.new_env, 1); + unset_vars(nommu_save.new_env); add_vars(nommu_save.old_vars); #endif free(argv_expanded); diff --git a/shell/hush_test/hush-z_slow/leak_all1.tests b/shell/hush_test/hush-z_slow/leak_all1.tests index 4e3c4fd..f8207cf 100755 --- a/shell/hush_test/hush-z_slow/leak_all1.tests +++ b/shell/hush_test/hush-z_slow/leak_all1.tests @@ -64,7 +64,7 @@ HERE trap "echo trap$i" WINCH f() { true; true; true; true; true; true; true; true; } f() { true; true; true; true; true; true; true; true; echo $1; } - f >/dev/null + i=iii$i t=ttt$i z=zzz$i f >/dev/null : $((i++)) done unset i l t @@ -132,7 +132,7 @@ HERE trap "echo trap$i" WINCH f() { true; true; true; true; true; true; true; true; } f() { true; true; true; true; true; true; true; true; echo $1; } - f >/dev/null + i=iii$i t=ttt$i z=zzz$i f >/dev/null : $((i++)) done unset i l t @@ -141,9 +141,8 @@ unset -f f memleak kb=$? -# Observed some variability, bumped to 12k -if test $kb -le 12; then +if test $kb -le 4; then echo Ok #$kb else - echo "Bad: $kb kb (or more) leaked" + echo "Bad: $kb kb leaked" fi |