Fix this case. No, really this time.
unset FOO
export FOO=bar
FOO=baz
echo "global env: " `env | grep ^FOO`
echo "local env: " `set | grep ^FOO`
-Erik
This commit is contained in:
Eric Andersen
111
hush.c
111
hush.c
@@ -1243,8 +1243,10 @@ static void checkjobs()
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break;
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}
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if(pi==NULL)
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return;
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if(pi==NULL) {
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debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
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continue;
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}
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if (WIFEXITED(status) || WIFSIGNALED(status)) {
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/* child exited */
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@@ -1352,7 +1354,24 @@ static int run_pipe_real(struct pipe *pi)
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if (i!=0 && child->argv[i]==NULL) {
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/* assignments, but no command: set the local environment */
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for (i=0; child->argv[i]!=NULL; i++) {
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set_local_var(child->argv[i], 0);
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/* Ok, this case is tricky. We have to decide if this is a
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* local variable, or an already exported variable. If it is
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* already exported, we have to export the new value. If it is
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* not exported, we need only set this as a local variable.
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* This junk is all to decide whether or not to export this
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* variable. */
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int export_me=0;
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char *name, *value;
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name = strdup(child->argv[i]);
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value = strchr(name, '=');
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if (value)
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*value=0;
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if ( get_local_var(name)) {
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export_me=1;
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}
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free(name);
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set_local_var(child->argv[i], export_me);
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}
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return EXIT_SUCCESS; /* don't worry about errors in set_local_var() yet */
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}
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@@ -1704,7 +1723,6 @@ static int set_local_var(const char *s, int flg_export)
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char *name, *value;
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int result=0;
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struct variables *cur;
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char *newval = 0;
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name=strdup(s);
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@@ -1712,55 +1730,52 @@ static int set_local_var(const char *s, int flg_export)
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* NAME=VALUE format. So the first order of business is to
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* split 's' on the '=' into 'name' and 'value' */
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value = strchr(name, '=');
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if (value==0 || (newval = strdup(value+1))==0) {
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result = -1;
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} else {
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*value++ = 0;
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if (value==0 && ++value==0) {
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free(name);
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return -1;
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}
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*value++ = 0;
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for(cur = top_vars; cur; cur = cur->next) {
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if(strcmp(cur->name, name)==0)
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break;
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}
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for(cur = top_vars; cur; cur = cur->next) {
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if(strcmp(cur->name, name)==0)
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break;
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}
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if(cur) {
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if(strcmp(cur->value, value)==0) {
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if(flg_export>0 && cur->flg_export==0)
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cur->flg_export=flg_export;
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else
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result++;
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free(newval);
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} else {
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if(cur->flg_read_only) {
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error_msg("%s: readonly variable", name);
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free(newval);
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result = -1;
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} else {
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if(flg_export>0 || cur->flg_export>1)
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cur->flg_export=1;
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free(cur->value);
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cur->value = newval;
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}
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}
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if(cur) {
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if(strcmp(cur->value, value)==0) {
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if(flg_export>0 && cur->flg_export==0)
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cur->flg_export=flg_export;
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else
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result++;
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} else {
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cur = malloc(sizeof(struct variables));
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if(cur==0) {
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free(newval);
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if(cur->flg_read_only) {
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error_msg("%s: readonly variable", name);
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result = -1;
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} else {
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cur->name = strdup(name);
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if(cur->name == 0) {
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free(cur);
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free(newval);
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result = -1;
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} else {
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struct variables *bottom = top_vars;
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cur->value = newval;
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cur->next = 0;
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cur->flg_export = flg_export;
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cur->flg_read_only = 0;
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while(bottom->next) bottom=bottom->next;
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bottom->next = cur;
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}
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if(flg_export>0 || cur->flg_export>1)
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cur->flg_export=1;
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free(cur->value);
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cur->value = strdup(value);
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}
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}
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} else {
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cur = malloc(sizeof(struct variables));
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if(!cur) {
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result = -1;
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} else {
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cur->name = strdup(name);
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if(cur->name == 0) {
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free(cur);
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result = -1;
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} else {
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struct variables *bottom = top_vars;
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cur->value = strdup(value);
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cur->next = 0;
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cur->flg_export = flg_export;
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cur->flg_read_only = 0;
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while(bottom->next) bottom=bottom->next;
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bottom->next = cur;
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}
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}
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}
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111
shell/hush.c
111
shell/hush.c
@@ -1243,8 +1243,10 @@ static void checkjobs()
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break;
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}
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if(pi==NULL)
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return;
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if(pi==NULL) {
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debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
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continue;
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}
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if (WIFEXITED(status) || WIFSIGNALED(status)) {
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/* child exited */
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@@ -1352,7 +1354,24 @@ static int run_pipe_real(struct pipe *pi)
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if (i!=0 && child->argv[i]==NULL) {
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/* assignments, but no command: set the local environment */
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for (i=0; child->argv[i]!=NULL; i++) {
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set_local_var(child->argv[i], 0);
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/* Ok, this case is tricky. We have to decide if this is a
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* local variable, or an already exported variable. If it is
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* already exported, we have to export the new value. If it is
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* not exported, we need only set this as a local variable.
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* This junk is all to decide whether or not to export this
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* variable. */
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int export_me=0;
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char *name, *value;
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name = strdup(child->argv[i]);
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value = strchr(name, '=');
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if (value)
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*value=0;
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if ( get_local_var(name)) {
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export_me=1;
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}
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free(name);
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set_local_var(child->argv[i], export_me);
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}
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return EXIT_SUCCESS; /* don't worry about errors in set_local_var() yet */
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}
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@@ -1704,7 +1723,6 @@ static int set_local_var(const char *s, int flg_export)
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char *name, *value;
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int result=0;
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struct variables *cur;
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char *newval = 0;
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name=strdup(s);
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@@ -1712,55 +1730,52 @@ static int set_local_var(const char *s, int flg_export)
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* NAME=VALUE format. So the first order of business is to
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* split 's' on the '=' into 'name' and 'value' */
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value = strchr(name, '=');
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if (value==0 || (newval = strdup(value+1))==0) {
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result = -1;
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} else {
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*value++ = 0;
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if (value==0 && ++value==0) {
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free(name);
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return -1;
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}
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*value++ = 0;
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for(cur = top_vars; cur; cur = cur->next) {
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if(strcmp(cur->name, name)==0)
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break;
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}
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for(cur = top_vars; cur; cur = cur->next) {
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if(strcmp(cur->name, name)==0)
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break;
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}
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if(cur) {
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if(strcmp(cur->value, value)==0) {
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if(flg_export>0 && cur->flg_export==0)
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cur->flg_export=flg_export;
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else
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result++;
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free(newval);
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} else {
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if(cur->flg_read_only) {
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error_msg("%s: readonly variable", name);
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free(newval);
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result = -1;
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} else {
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if(flg_export>0 || cur->flg_export>1)
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cur->flg_export=1;
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free(cur->value);
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cur->value = newval;
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}
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}
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if(cur) {
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if(strcmp(cur->value, value)==0) {
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if(flg_export>0 && cur->flg_export==0)
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cur->flg_export=flg_export;
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else
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result++;
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} else {
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cur = malloc(sizeof(struct variables));
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if(cur==0) {
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free(newval);
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if(cur->flg_read_only) {
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error_msg("%s: readonly variable", name);
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result = -1;
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} else {
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cur->name = strdup(name);
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if(cur->name == 0) {
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free(cur);
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free(newval);
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result = -1;
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} else {
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struct variables *bottom = top_vars;
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cur->value = newval;
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cur->next = 0;
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cur->flg_export = flg_export;
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cur->flg_read_only = 0;
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while(bottom->next) bottom=bottom->next;
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bottom->next = cur;
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}
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if(flg_export>0 || cur->flg_export>1)
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cur->flg_export=1;
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free(cur->value);
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cur->value = strdup(value);
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}
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}
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} else {
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cur = malloc(sizeof(struct variables));
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if(!cur) {
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result = -1;
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} else {
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cur->name = strdup(name);
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if(cur->name == 0) {
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free(cur);
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result = -1;
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} else {
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struct variables *bottom = top_vars;
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cur->value = strdup(value);
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cur->next = 0;
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cur->flg_export = flg_export;
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cur->flg_read_only = 0;
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while(bottom->next) bottom=bottom->next;
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bottom->next = cur;
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}
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}
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}
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Block a user