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This commit is contained in:
Antoine Bartuccio 2017-06-11 17:52:05 +02:00
parent b7165df43f
commit 5e63f08650
2 changed files with 65 additions and 19 deletions
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69
fish_shell/fish_core.c
View File

@ -19,10 +19,15 @@ pipe_redirection * getRedirection(){
if (redirection == NULL){
redirection = (pipe_redirection*) malloc(sizeof(pipe_redirection));
if (redirection == NULL) crash();
redirection->file_name = strdup((char*) "/tmp/fishXXXXXX");
redirection->tmp_file = mkstemp(redirection->file_name);
redirection->files_name[0] = strdup((char*) "/tmp/fishXXXXXX");
redirection->files_name[1] = strdup((char*) "/tmp/fishXXXXXX");
redirection->tmp_files[0] = mkstemp(redirection->files_name[0]);
redirection->tmp_files[1] = mkstemp(redirection->files_name[1]);
redirection->to_use = 0;
redirection->read = 0;
redirection->read = WRITE;
redirection->nb = 0;
redirection->nb_max = 0;
redirection->file_use = 0;
}
return redirection;
@ -31,10 +36,14 @@ pipe_redirection * getRedirection(){
void freeRedirection(){
pipe_redirection * redirection = getRedirection();
close(redirection->tmp_file);
unlink(redirection->file_name);
remove(redirection->file_name);
free(redirection->file_name);
close(redirection->tmp_files[0]);
close(redirection->tmp_files[1]);
unlink(redirection->files_name[0]);
unlink(redirection->files_name[1]);
remove(redirection->files_name[0]);
remove(redirection->files_name[1]);
free(redirection->files_name[0]);
free(redirection->files_name[1]);
free(redirection);
}
@ -50,7 +59,8 @@ void fishLoop(Settings * settings){
line = fishReadLine();
r->to_use = 0;
r->read = 0;
r->nb = countSeparators(line, "\\|[^\\|]");
r->nb_max = r->nb;
splited = split(line, (char*) FISH_TOKENS);
splited = fishExpand(splited);
@ -148,10 +158,13 @@ int fishLoad(WordArray *array) {
pid = fork();
if (pid == 0){
if (redirection->to_use){
if (redirection->read){
dup2(redirection->tmp_file, STDIN_FILENO);
if (redirection->read == READ){
dup2(redirection->tmp_files[redirection->file_use], STDIN_FILENO);
} else if (redirection->read == WRITE) {
dup2(redirection->tmp_files[redirection->file_use], STDOUT_FILENO);
} else {
dup2(redirection->tmp_file, STDOUT_FILENO);
dup2(redirection->tmp_files[!redirection->file_use], STDIN_FILENO);
dup2(redirection->tmp_files[redirection->file_use], STDOUT_FILENO);
}
}
/* Executes only in the child process */
@ -208,14 +221,38 @@ int fishExecute(WordList *list) {
break;
case PIPE:
redirection = getRedirection();
if (redirection->nb == redirection->nb_max){
redirection->read = WRITE;
redirection->file_use = 0;
} else if (redirection->nb > 0){
redirection->read = READ_AND_WRITE;
redirection->file_use = !redirection->file_use;
} else {
redirection->read = READ;
redirection->file_use = !redirection->file_use;
}
redirection->to_use = 1;
redirection->read = 0;
--redirection->nb;
if (redirection->read == WRITE) ftruncate(redirection->tmp_files[redirection->file_use], 0);
lseek(redirection->tmp_files[0], 0L, 0);
lseek(redirection->tmp_files[1], 0L, 0);
fishExecute(list);
lseek(redirection->tmp_file, 0L, 0);
redirection->read = 1;
redirection->read = WRITE;
if (redirection->nb > 0){
redirection->read = READ_AND_WRITE;
} else {
redirection->read = READ;
}
if (redirection->read == WRITE) ftruncate(redirection->tmp_files[redirection->file_use], 0);
lseek(redirection->tmp_files[0], 0L, 0);
lseek(redirection->tmp_files[1], 0L, 0);
signal = fishExecute(splited);
lseek(redirection->tmp_file, 0L, 0);
ftruncate(redirection->tmp_file, 0);
redirection->to_use = 0;
break;
case BACKGROUND_PROCESS:

15
fish_shell/fish_types.h
View File

@ -23,6 +23,12 @@ typedef enum {
REVERSE_AND
} shell_operator ;
typedef enum {
READ,
WRITE,
READ_AND_WRITE
} redirection_mode ;
typedef struct {
char ** words;
int size;
@ -49,9 +55,12 @@ typedef struct {
typedef struct {
int to_use;
int read;
int tmp_file;
char * file_name;
int nb;
int nb_max;
int file_use;
int tmp_files[2];
char * files_name[2];
redirection_mode read;
} pipe_redirection;
typedef int (builtinCommand) (WordArray*);