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Commit 9e2d48fd authored by desiredeveloper's avatar desiredeveloper
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part 4 IO

parent a8193dca
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Showing with 86 additions and 25 deletions
assignment1/part1.c
View file @ 9e2d48fd
...@@ -60,23 +60,29 @@ void funcCd(char *fpath){ ...@@ -60,23 +60,29 @@ void funcCd(char *fpath){
free(temp); free(temp);
} }
void exBackground(char **tokens,int n){
void ioRedirect(char **tokens,int n){
FILE *fp;
char **arglist = (char **)malloc(MAX_NUM_TOKENS * sizeof(char *)); char **arglist = (char **)malloc(MAX_NUM_TOKENS * sizeof(char *));
int j=0,forkcalls=0; int j=0;
for(int i=0;i<n;i++){ for(int i=0;strcmp(tokens[i],">>") && strcmp(tokens[i],">") && strcmp(tokens[i],"<");i++){
while(tokens[i]!=NULL && strcmp(tokens[i],"&")!=0 ){
arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char)); arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char));
strcpy(arglist[j++],tokens[i++]); strcpy(arglist[j++],tokens[i]);
} }
arglist[j]=NULL; arglist[j]=NULL;
forkcalls++;
char *temp = (char *)malloc(sizeof(char)*150); char *temp = (char *)malloc(sizeof(char)*150);
switch (fork()) { switch (fork()) {
case -1: case -1:
break; break;
case 0: case 0:
if(!strcmp(tokens[n-2],">>"))
fp = freopen(tokens[n-1],"a",stdout);
else if(!strcmp(tokens[n-2],">"))
fp = freopen(tokens[n-1],"w",stdout);
else
fp = freopen(tokens[n-1],"r",stdin);
strcpy(temp,"/bin/"); strcpy(temp,"/bin/");
strcat(temp,arglist[0]); strcat(temp,arglist[0]);
if(execv(temp,arglist)==-1){ if(execv(temp,arglist)==-1){
...@@ -86,8 +92,7 @@ void exBackground(char **tokens,int n){ ...@@ -86,8 +92,7 @@ void exBackground(char **tokens,int n){
} }
free(temp); free(temp);
} }
j=0; wait(NULL);
}
for(int i=0;arglist[i]!=NULL;i++) for(int i=0;arglist[i]!=NULL;i++)
free(arglist[i]); free(arglist[i]);
...@@ -95,16 +100,17 @@ void exBackground(char **tokens,int n){ ...@@ -95,16 +100,17 @@ void exBackground(char **tokens,int n){
free(arglist); free(arglist);
} }
void exSerial(char **tokens,int n){ void exBackground(char **tokens,int n){
char **arglist = (char **)malloc(MAX_NUM_TOKENS * sizeof(char *)); char **arglist = (char **)malloc(MAX_NUM_TOKENS * sizeof(char *));
int j=0; int j=0,forkcalls=0;
for(int i=0;i<n;i++){ for(int i=0;i<n;i++){
while(tokens[i]!=NULL && strcmp(tokens[i],"&&")!=0 ){ while(tokens[i]!=NULL && strcmp(tokens[i],"&")!=0 ){
arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char)); arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char));
strcpy(arglist[j++],tokens[i++]); strcpy(arglist[j++],tokens[i++]);
} }
arglist[j]=NULL; arglist[j]=NULL;
forkcalls++;
char *temp = (char *)malloc(sizeof(char)*150); char *temp = (char *)malloc(sizeof(char)*150);
switch (fork()) { switch (fork()) {
...@@ -120,6 +126,48 @@ void exSerial(char **tokens,int n){ ...@@ -120,6 +126,48 @@ void exSerial(char **tokens,int n){
} }
free(temp); free(temp);
} }
j=0;
}
for(int i=0;arglist[i]!=NULL;i++)
free(arglist[i]);
free(arglist);
}
void exSerial(char **tokens,int n){
char **arglist = (char **)malloc(MAX_NUM_TOKENS * sizeof(char *));
int j=0;
for(int i=0;i<n;i++){
int ioFlag = 0;
while(tokens[i]!=NULL && strcmp(tokens[i],"&&")!=0 ){
if(!ioFlag)
ioFlag=strcmp(tokens[i],">>")==0 || strcmp(tokens[i],">")==0 || strcmp(tokens[i],"<")==0;
arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char));
strcpy(arglist[j++],tokens[i++]);
}
arglist[j]=NULL;
char *temp = (char *)malloc(sizeof(char)*150);
if(!ioFlag){
switch (fork()) {
case -1:
break;
case 0:
strcpy(temp,"/bin/");
strcat(temp,arglist[0]);
if(execv(temp,arglist)==-1){
strcpy(temp,"/usr/bin/");
strcat(temp,arglist[0]);
execv(temp,arglist);
}
free(temp);
}
}
else {
ioRedirect(arglist,j);
}
wait(NULL); wait(NULL);
j=0; j=0;
} }
...@@ -135,27 +183,34 @@ void exParallel(char **tokens,int n){ ...@@ -135,27 +183,34 @@ void exParallel(char **tokens,int n){
int j=0,forkcalls=0; int j=0,forkcalls=0;
for(int i=0;i<n;i++){ for(int i=0;i<n;i++){
int ioFlag = 0;
while(tokens[i]!=NULL && strcmp(tokens[i],"&&&")!=0 ){ while(tokens[i]!=NULL && strcmp(tokens[i],"&&&")!=0 ){
if(!ioFlag)
ioFlag=strcmp(tokens[i],">>")==0 || strcmp(tokens[i],">")==0 || strcmp(tokens[i],"<")==0;
arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char)); arglist[j] = (char*)malloc(MAX_TOKEN_SIZE*sizeof(char));
strcpy(arglist[j++],tokens[i++]); strcpy(arglist[j++],tokens[i++]);
} }
forkcalls++;
arglist[j]=NULL; arglist[j]=NULL;
char *temp = (char *)malloc(sizeof(char)*150); char *temp = (char *)malloc(sizeof(char)*150);
switch (fork()) { if(!ioFlag){
case -1: forkcalls++;
break; switch (fork()) {
case 0: case -1:
strcpy(temp,"/bin/"); break;
strcat(temp,arglist[0]); case 0:
if(execv(temp,arglist)==-1){ strcpy(temp,"/bin/");
strcpy(temp,"/usr/bin/");
strcat(temp,arglist[0]); strcat(temp,arglist[0]);
execv(temp,arglist); if(execv(temp,arglist)==-1){
} strcpy(temp,"/usr/bin/");
free(temp); strcat(temp,arglist[0]);
execv(temp,arglist);
}
free(temp);
}
}
else {
ioRedirect(arglist,j);
} }
j=0; j=0;
} }
...@@ -169,6 +224,7 @@ void exParallel(char **tokens,int n){ ...@@ -169,6 +224,7 @@ void exParallel(char **tokens,int n){
free(arglist); free(arglist);
} }
/* Splits the string by space and returns the array of tokens /* Splits the string by space and returns the array of tokens
*/ */
...@@ -216,7 +272,7 @@ int main(int argc, char* argv[]) { ...@@ -216,7 +272,7 @@ int main(int argc, char* argv[]) {
} }
while(1) { while(1) {
int parallel=0,serial=0,background=0,internal=0,cdir=0; int parallel=0,serial=0,background=0,io=0,cdir=0;
/* BEGIN: TAKING INPUT */ /* BEGIN: TAKING INPUT */
bzero(line, sizeof(line)); bzero(line, sizeof(line));
...@@ -250,6 +306,9 @@ int main(int argc, char* argv[]) { ...@@ -250,6 +306,9 @@ int main(int argc, char* argv[]) {
if(!background) if(!background)
background=strcmp(tokens[i],"&")==0; background=strcmp(tokens[i],"&")==0;
if(!io)
io=strcmp(tokens[i],">>")==0 || strcmp(tokens[i],">")==0 || strcmp(tokens[i],"<")==0;
// printf("found token %s\n", tokens[i]); // printf("found token %s\n", tokens[i]);
} }
t1 = clock(); t1 = clock();
...@@ -259,6 +318,8 @@ int main(int argc, char* argv[]) { ...@@ -259,6 +318,8 @@ int main(int argc, char* argv[]) {
exSerial(tokens,i); exSerial(tokens,i);
else if(background) else if(background)
exBackground(tokens,i); exBackground(tokens,i);
else if(io)
ioRedirect(tokens,i);
else { else {
if(!strcmp(tokens[0],"dir")){ if(!strcmp(tokens[0],"dir")){
funcDir(tokens); funcDir(tokens);
......
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