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-rw-r--r--shell/hush.c237
1 files changed, 115 insertions, 122 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 7792887..c4b393b 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -390,8 +390,8 @@ static void remove_bg_job(struct pipe *pi);
static char **make_list_in(char **inp, char *name);
static char *insert_var_value(char *inp);
static const char *get_local_var(const char *var);
-static void unset_local_var(const char *name);
static int set_local_var(const char *s, int flg_export);
+static void unset_local_var(const char *name);
/* Table of built-in functions. They can be forked or not, depending on
* context: within pipes, they fork. As simple commands, they do not.
@@ -440,20 +440,8 @@ static void sigexit(int sig)
sigfillset(&block_all);
sigprocmask(SIG_SETMASK, &block_all, NULL);
- if (interactive_fd) {
- if (sig > 0) {
- enum { KILLED = sizeof("Killed by signal ")-1 };
- char buf[KILLED + sizeof(int)*3 + 1];
- char *p;
-
- /* bash actually says "Illegal instruction" and the like */
- strcpy(buf, "Killed by signal ");
- p = utoa_to_buf(sig, buf+KILLED, sizeof(buf)-KILLED);
- *p++ = '\n';
- write(interactive_fd, buf, p-buf);
- }
+ if (interactive_fd)
tcsetpgrp(interactive_fd, saved_tty_pgrp);
- }
/* Not a signal, just exit */
if (sig <= 0)
@@ -1134,16 +1122,18 @@ static void restore_redirects(int squirrel[])
/* never returns */
/* XXX no exit() here. If you don't exec, use _exit instead.
* The at_exit handlers apparently confuse the calling process,
- * in particular stdin handling. Not sure why? */
+ * in particular stdin handling. Not sure why? -- because of vfork! (vda) */
static void pseudo_exec(struct child_prog *child)
{
int i, rcode;
char *p;
const struct built_in_command *x;
+
if (child->argv) {
for (i = 0; is_assignment(child->argv[i]); i++) {
debug_printf("pid %d environment modification: %s\n",
getpid(), child->argv[i]);
+ // FIXME: vfork case??
p = insert_var_value(child->argv[i]);
putenv(strdup(p));
if (p != child->argv[i])
@@ -1152,6 +1142,8 @@ static void pseudo_exec(struct child_prog *child)
child->argv += i; /* XXX this hack isn't so horrible, since we are about
to exit, and therefore don't need to keep data
structures consistent for free() use. */
+ // FIXME: ...unless we have _vforked_! Think NOMMU!
+
/* If a variable is assigned in a forest, and nobody listens,
* was it ever really set?
*/
@@ -1191,12 +1183,13 @@ static void pseudo_exec(struct child_prog *child)
#endif
debug_printf("exec of %s\n", child->argv[0]);
execvp(child->argv[0], child->argv);
- bb_perror_msg("cannot exec: %s", child->argv[0]);
+ bb_perror_msg("cannot exec '%s'", child->argv[0]);
_exit(1);
}
if (child->group) {
debug_printf("runtime nesting to group\n");
+ // FIXME: do not modify globals! Think vfork!
interactive_fd = 0; /* crucial!!!! */
rcode = run_list_real(child->group);
/* OK to leak memory by not calling free_pipe_list,
@@ -1873,6 +1866,86 @@ static int xglob(o_string *dest, int flags, glob_t *pglob)
return gr;
}
+static char **make_list_in(char **inp, char *name)
+{
+ int len, i;
+ int name_len = strlen(name);
+ int n = 0;
+ char **list;
+ char *p1, *p2, *p3;
+
+ /* create list of variable values */
+ list = xmalloc(sizeof(*list));
+ for (i = 0; inp[i]; i++) {
+ p3 = insert_var_value(inp[i]);
+ p1 = p3;
+ while (*p1) {
+ if ((*p1 == ' ')) {
+ p1++;
+ continue;
+ }
+ p2 = strchr(p1, ' ');
+ if (p2) {
+ len = p2 - p1;
+ } else {
+ len = strlen(p1);
+ p2 = p1 + len;
+ }
+ /* we use n + 2 in realloc for list, because we add
+ * new element and then we will add NULL element */
+ list = xrealloc(list, sizeof(*list) * (n + 2));
+ list[n] = xmalloc(2 + name_len + len);
+ strcpy(list[n], name);
+ strcat(list[n], "=");
+ strncat(list[n], p1, len);
+ list[n++][name_len + len + 1] = '\0';
+ p1 = p2;
+ }
+ if (p3 != inp[i]) free(p3);
+ }
+ list[n] = NULL;
+ return list;
+}
+
+static char *insert_var_value(char *inp)
+{
+ int res_str_len = 0;
+ int len;
+ int done = 0;
+ char *p, *res_str = NULL;
+ const char *p1;
+
+ while ((p = strchr(inp, SPECIAL_VAR_SYMBOL))) {
+ if (p != inp) {
+ len = p - inp;
+ res_str = xrealloc(res_str, (res_str_len + len));
+ strncpy((res_str + res_str_len), inp, len);
+ res_str_len += len;
+ }
+ inp = ++p;
+ p = strchr(inp, SPECIAL_VAR_SYMBOL);
+ *p = '\0';
+ p1 = lookup_param(inp);
+ if (p1) {
+ len = res_str_len + strlen(p1);
+ res_str = xrealloc(res_str, (1 + len));
+ strcpy((res_str + res_str_len), p1);
+ res_str_len = len;
+ }
+ *p = SPECIAL_VAR_SYMBOL;
+ inp = ++p;
+ done = 1;
+ }
+ if (done) {
+ res_str = xrealloc(res_str, (1 + res_str_len + strlen(inp)));
+ strcpy((res_str + res_str_len), inp);
+ while ((p = strchr(res_str, '\n'))) {
+ *p = ' ';
+ }
+ }
+ return (res_str == NULL) ? inp : res_str;
+}
+
/* This is used to get/check local shell variables */
static const char *get_local_var(const char *s)
{
@@ -2424,6 +2497,32 @@ static const char *lookup_param(const char *src)
return p;
}
+/* Make new string for parser */
+static char* make_string(char ** inp)
+{
+ char *p;
+ char *str = NULL;
+ int n;
+ int len = 2;
+
+ for (n = 0; inp[n]; n++) {
+ p = insert_var_value(inp[n]);
+ str = xrealloc(str, (len + strlen(p)));
+ if (n) {
+ strcat(str, " ");
+ } else {
+ *str = '\0';
+ }
+ strcat(str, p);
+ len = strlen(str) + 3;
+ if (p != inp[n]) free(p);
+ }
+ len = strlen(str);
+ str[len] = '\n';
+ str[len+1] = '\0';
+ return str;
+}
+
/* return code: 0 for OK, 1 for syntax error */
static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
{
@@ -2943,109 +3042,3 @@ int hush_main(int argc, char **argv)
final_return:
hush_exit(opt ? opt : last_return_code);
}
-
-static char *insert_var_value(char *inp)
-{
- int res_str_len = 0;
- int len;
- int done = 0;
- char *p, *res_str = NULL;
- const char *p1;
-
- while ((p = strchr(inp, SPECIAL_VAR_SYMBOL))) {
- if (p != inp) {
- len = p - inp;
- res_str = xrealloc(res_str, (res_str_len + len));
- strncpy((res_str + res_str_len), inp, len);
- res_str_len += len;
- }
- inp = ++p;
- p = strchr(inp, SPECIAL_VAR_SYMBOL);
- *p = '\0';
- p1 = lookup_param(inp);
- if (p1) {
- len = res_str_len + strlen(p1);
- res_str = xrealloc(res_str, (1 + len));
- strcpy((res_str + res_str_len), p1);
- res_str_len = len;
- }
- *p = SPECIAL_VAR_SYMBOL;
- inp = ++p;
- done = 1;
- }
- if (done) {
- res_str = xrealloc(res_str, (1 + res_str_len + strlen(inp)));
- strcpy((res_str + res_str_len), inp);
- while ((p = strchr(res_str, '\n'))) {
- *p = ' ';
- }
- }
- return (res_str == NULL) ? inp : res_str;
-}
-
-static char **make_list_in(char **inp, char *name)
-{
- int len, i;
- int name_len = strlen(name);
- int n = 0;
- char **list;
- char *p1, *p2, *p3;
-
- /* create list of variable values */
- list = xmalloc(sizeof(*list));
- for (i = 0; inp[i]; i++) {
- p3 = insert_var_value(inp[i]);
- p1 = p3;
- while (*p1) {
- if ((*p1 == ' ')) {
- p1++;
- continue;
- }
- p2 = strchr(p1, ' ');
- if (p2) {
- len = p2 - p1;
- } else {
- len = strlen(p1);
- p2 = p1 + len;
- }
- /* we use n + 2 in realloc for list, because we add
- * new element and then we will add NULL element */
- list = xrealloc(list, sizeof(*list) * (n + 2));
- list[n] = xmalloc(2 + name_len + len);
- strcpy(list[n], name);
- strcat(list[n], "=");
- strncat(list[n], p1, len);
- list[n++][name_len + len + 1] = '\0';
- p1 = p2;
- }
- if (p3 != inp[i]) free(p3);
- }
- list[n] = NULL;
- return list;
-}
-
-/* Make new string for parser */
-static char* make_string(char ** inp)
-{
- char *p;
- char *str = NULL;
- int n;
- int len = 2;
-
- for (n = 0; inp[n]; n++) {
- p = insert_var_value(inp[n]);
- str = xrealloc(str, (len + strlen(p)));
- if (n) {
- strcat(str, " ");
- } else {
- *str = '\0';
- }
- strcat(str, p);
- len = strlen(str) + 3;
- if (p != inp[n]) free(p);
- }
- len = strlen(str);
- str[len] = '\n';
- str[len+1] = '\0';
- return str;
-}
generated by cgit v1.1 at 2024-12-26 06:43:18 +0000