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ifupdown: parse() returning NULL and returning "" is not the same,

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it turned out! wow... okay, fixing my buglet...
This commit is contained in:
Denis Vlasenko
2006-12-19 23:01:33 +00:00
parent 28703015ab
commit 8cd1a288fa
2 changed files with 16 additions and 12 deletions
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3
Makefile
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@@ -573,7 +573,8 @@ ifdef CONFIG_STATIC
-Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
-Wl,--start-group $(busybox-all) -Wl,--end-group
else
cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) -o $@ $(LDFLAGS) \
cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
-o $@ \
-Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
-Wl,--start-group $(busybox-all) -Wl,--end-group
endif

25
networking/ifupdown.c
View File

@@ -103,7 +103,7 @@ enum {
#define FORCE (option_mask32 & OPT_force)
#define NO_MAPPINGS (option_mask32 & OPT_no_mappings)
static char **__myenviron;
static char **my_environ;
static char *startup_PATH;
@@ -187,7 +187,7 @@ static char *parse(const char *command, struct interface_defn_t *ifd)
size_t old_pos[MAX_OPT_DEPTH] = { 0 };
int okay[MAX_OPT_DEPTH] = { 1 };
int opt_depth = 1;
char *result = xstrdup("");
char *result = NULL;
while (*command) {
switch (*command) {
@@ -206,7 +206,7 @@ static char *parse(const char *command, struct interface_defn_t *ifd)
break;
case '[':
if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
old_pos[opt_depth] = strlen(result);
old_pos[opt_depth] = result ? strlen(result) : 0;
okay[opt_depth] = 1;
opt_depth++;
command += 2;
@@ -290,7 +290,7 @@ static int execute(const char *command, struct interface_defn_t *ifd, execfn *ex
int ret;
out = parse(command, ifd);
if (!out || !out[0]) {
if (!out) {
return 0;
}
ret = (*exec)(out);
@@ -871,15 +871,15 @@ static void set_environ(struct interface_defn_t *iface, const char *mode)
const int n_env_entries = iface->n_options + 5;
char **ppch;
if (__myenviron != NULL) {
for (ppch = __myenviron; *ppch; ppch++) {
if (my_environ != NULL) {
for (ppch = my_environ; *ppch; ppch++) {
free(*ppch);
*ppch = NULL;
}
free(__myenviron);
free(my_environ);
}
__myenviron = xzalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
environend = __myenviron;
my_environ = xzalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
environend = my_environ;
for (i = 0; i < iface->n_options; i++) {
if (strcmp(iface->option[i].name, "up") == 0
@@ -903,6 +903,9 @@ static int doit(char *str)
if (option_mask32 & (OPT_no_act|OPT_verbose)) {
puts(str);
}
/* FIXME: is it true that we can reach this place with str = ""? */
/* how? in execute() parse() may return "", then we do (*exec)(""); */
/* Please add a comment... */
if (!(option_mask32 & OPT_no_act)) {
pid_t child;
int status;
@@ -912,7 +915,7 @@ static int doit(char *str)
case -1: /* failure */
return 0;
case 0: /* child */
execle(DEFAULT_SHELL, DEFAULT_SHELL, "-c", str, NULL, __myenviron);
execle(DEFAULT_SHELL, DEFAULT_SHELL, "-c", str, NULL, my_environ);
exit(127);
}
waitpid(child, &status, 0);
@@ -1206,7 +1209,7 @@ int ifupdown_main(int argc, char **argv)
okay = 1;
currif->iface = iface;
debug_noise("\nZ Configuring interface %s (%s)\n", liface, currif->address_family->name);
debug_noise("\nConfiguring interface %s (%s)\n", liface, currif->address_family->name);
/* Call the cmds function pointer, does either iface_up() or iface_down() */
cmds_ret = cmds(currif);