Fix a massive memory leak in the run_list_test() function.

Rename run_list_test() as free_pipe_list().
Rename run_pipe_test() as free_pipe().
 -Erik

diff --git a/hush.c b/hush.c
index 0dc2d62f87e9775224722a79dfdbcd13f61d3c70..57b85d1bc5574fbb30c8719a96a8079219acab57 100644 (file)
--- a/hush.c
+++ b/hush.c
@@ -357,8 +357,8 @@ static void mark_closed(int fd);
 static void close_all();
 /*  "run" the final data structures: */
 static char *indenter(int i);
-static int run_list_test(struct pipe *head, int indent);
-static int run_pipe_test(struct pipe *pi, int indent);
+static int free_pipe_list(struct pipe *head, int indent);
+static int free_pipe(struct pipe *pi, int indent);
 /*  really run the final data structures: */
 static int setup_redirects(struct child_prog *prog, int squirrel[]);
 static int pipe_wait(struct pipe *pi);
@@ -395,7 +395,6 @@ static int parse_file_outer(FILE *f);
 static void checkjobs();
 static void insert_bg_job(struct pipe *pi);
 static void remove_bg_job(struct pipe *pi);
-static void free_pipe(struct pipe *pi);
 /*     local variable support */
 static char *get_local_var(const char *var);
 static void  unset_local_var(const char *name);
@@ -1138,7 +1137,7 @@ static void pseudo_exec(struct child_prog *child)
                debug_printf("runtime nesting to group\n");
                interactive=0;    /* crucial!!!! */
                rcode = run_list_real(child->group);
-               /* OK to leak memory by not calling run_list_test,
+               /* OK to leak memory by not calling free_pipe_list,
                 * since this process is about to exit */
                _exit(rcode);
        } else {
@@ -1203,30 +1202,10 @@ static void remove_bg_job(struct pipe *pi)
                prev_pipe->next = pi->next;
        }
 
-       free_pipe(pi);
+       free_pipe(pi, 0);
        free(pi);
 }
 
-/* free up all memory from a pipe */
-static void free_pipe(struct pipe *pi)
-{
-       int i;
-
-       for (i = 0; i < pi->num_progs; i++) {
-               free(pi->progs[i].argv);
-               if (pi->progs[i].redirects)
-                       free(pi->progs[i].redirects);
-       }
-       if (pi->progs)
-               free(pi->progs);
-       if (pi->text)
-               free(pi->text);
-       if (pi->cmdbuf)
-               free(pi->cmdbuf);
-       memset(pi, 0, sizeof(struct pipe));
-}
-
-
 /* Checks to see if any background processes have exited -- if they 
    have, figure out why and see if a job has completed */
 static void checkjobs()
@@ -1535,7 +1514,7 @@ static char *indenter(int i)
 }
 
 /* return code is the exit status of the pipe */
-static int run_pipe_test(struct pipe *pi, int indent)
+static int free_pipe(struct pipe *pi, int indent)
 {
        char **p;
        struct child_prog *child;
@@ -1554,7 +1533,7 @@ static int run_pipe_test(struct pipe *pi, int indent)
                        child->argv=NULL;
                } else if (child->group) {
                        final_printf("%s   begin group (subshell:%d)\n",ind, child->subshell);
-                       ret_code = run_list_test(child->group,indent+3);
+                       ret_code = free_pipe_list(child->group,indent+3);
                        final_printf("%s   end group\n",ind);
                } else {
                        final_printf("%s   (nil)\n",ind);
@@ -1577,15 +1556,14 @@ static int run_pipe_test(struct pipe *pi, int indent)
        return ret_code;
 }
 
-static int run_list_test(struct pipe *head, int indent)
+static int free_pipe_list(struct pipe *head, int indent)
 {
        int rcode=0;   /* if list has no members */
        struct pipe *pi, *next;
        char *ind = indenter(indent);
        for (pi=head; pi; pi=next) {
-               if (pi->num_progs == 0) break;
                final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
-               rcode = run_pipe_test(pi, indent);
+               rcode = free_pipe(pi, indent);
                final_printf("%s pipe followup code %d\n", ind, pi->followup);
                next=pi->next;
                pi->next=NULL;
@@ -1601,10 +1579,10 @@ static int run_list(struct pipe *pi)
        if (fake_mode==0) {
                rcode = run_list_real(pi);
        } 
-       /* run_list_test has the side effect of clearing memory
+       /* free_pipe_list has the side effect of clearing memory
         * In the long run that function can be merged with run_list_real,
         * but doing that now would hobble the debugging effort. */
-       run_list_test(pi,0);
+       free_pipe_list(pi,0);
        return rcode;
 }
 
@@ -2142,7 +2120,7 @@ FILE *generate_stream_from_list(struct pipe *head)
        pf = fdopen(channel[0],"r");
        debug_printf("pipe on FILE *%p\n",pf);
 #else
-       run_list_test(head,0);
+       free_pipe_list(head,0);
        pf=popen("echo surrogate response","r");
        debug_printf("started fake pipe on FILE *%p\n",pf);
 #endif

diff --git a/shell/hush.c b/shell/hush.c
index 0dc2d62f87e9775224722a79dfdbcd13f61d3c70..57b85d1bc5574fbb30c8719a96a8079219acab57 100644 (file)
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -357,8 +357,8 @@ static void mark_closed(int fd);
 static void close_all();
 /*  "run" the final data structures: */
 static char *indenter(int i);
-static int run_list_test(struct pipe *head, int indent);
-static int run_pipe_test(struct pipe *pi, int indent);
+static int free_pipe_list(struct pipe *head, int indent);
+static int free_pipe(struct pipe *pi, int indent);
 /*  really run the final data structures: */
 static int setup_redirects(struct child_prog *prog, int squirrel[]);
 static int pipe_wait(struct pipe *pi);
@@ -395,7 +395,6 @@ static int parse_file_outer(FILE *f);
 static void checkjobs();
 static void insert_bg_job(struct pipe *pi);
 static void remove_bg_job(struct pipe *pi);
-static void free_pipe(struct pipe *pi);
 /*     local variable support */
 static char *get_local_var(const char *var);
 static void  unset_local_var(const char *name);
@@ -1138,7 +1137,7 @@ static void pseudo_exec(struct child_prog *child)
                debug_printf("runtime nesting to group\n");
                interactive=0;    /* crucial!!!! */
                rcode = run_list_real(child->group);
-               /* OK to leak memory by not calling run_list_test,
+               /* OK to leak memory by not calling free_pipe_list,
                 * since this process is about to exit */
                _exit(rcode);
        } else {
@@ -1203,30 +1202,10 @@ static void remove_bg_job(struct pipe *pi)
                prev_pipe->next = pi->next;
        }
 
-       free_pipe(pi);
+       free_pipe(pi, 0);
        free(pi);
 }
 
-/* free up all memory from a pipe */
-static void free_pipe(struct pipe *pi)
-{
-       int i;
-
-       for (i = 0; i < pi->num_progs; i++) {
-               free(pi->progs[i].argv);
-               if (pi->progs[i].redirects)
-                       free(pi->progs[i].redirects);
-       }
-       if (pi->progs)
-               free(pi->progs);
-       if (pi->text)
-               free(pi->text);
-       if (pi->cmdbuf)
-               free(pi->cmdbuf);
-       memset(pi, 0, sizeof(struct pipe));
-}
-
-
 /* Checks to see if any background processes have exited -- if they 
    have, figure out why and see if a job has completed */
 static void checkjobs()
@@ -1535,7 +1514,7 @@ static char *indenter(int i)
 }
 
 /* return code is the exit status of the pipe */
-static int run_pipe_test(struct pipe *pi, int indent)
+static int free_pipe(struct pipe *pi, int indent)
 {
        char **p;
        struct child_prog *child;
@@ -1554,7 +1533,7 @@ static int run_pipe_test(struct pipe *pi, int indent)
                        child->argv=NULL;
                } else if (child->group) {
                        final_printf("%s   begin group (subshell:%d)\n",ind, child->subshell);
-                       ret_code = run_list_test(child->group,indent+3);
+                       ret_code = free_pipe_list(child->group,indent+3);
                        final_printf("%s   end group\n",ind);
                } else {
                        final_printf("%s   (nil)\n",ind);
@@ -1577,15 +1556,14 @@ static int run_pipe_test(struct pipe *pi, int indent)
        return ret_code;
 }
 
-static int run_list_test(struct pipe *head, int indent)
+static int free_pipe_list(struct pipe *head, int indent)
 {
        int rcode=0;   /* if list has no members */
        struct pipe *pi, *next;
        char *ind = indenter(indent);
        for (pi=head; pi; pi=next) {
-               if (pi->num_progs == 0) break;
                final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
-               rcode = run_pipe_test(pi, indent);
+               rcode = free_pipe(pi, indent);
                final_printf("%s pipe followup code %d\n", ind, pi->followup);
                next=pi->next;
                pi->next=NULL;
@@ -1601,10 +1579,10 @@ static int run_list(struct pipe *pi)
        if (fake_mode==0) {
                rcode = run_list_real(pi);
        } 
-       /* run_list_test has the side effect of clearing memory
+       /* free_pipe_list has the side effect of clearing memory
         * In the long run that function can be merged with run_list_real,
         * but doing that now would hobble the debugging effort. */
-       run_list_test(pi,0);
+       free_pipe_list(pi,0);
        return rcode;
 }
 
@@ -2142,7 +2120,7 @@ FILE *generate_stream_from_list(struct pipe *head)
        pf = fdopen(channel[0],"r");
        debug_printf("pipe on FILE *%p\n",pf);
 #else
-       run_list_test(head,0);
+       free_pipe_list(head,0);
        pf=popen("echo surrogate response","r");
        debug_printf("started fake pipe on FILE *%p\n",pf);
 #endif