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This commit is contained in:
Matteo Schiff
2024-03-22 16:54:05 +01:00
parent 0d9957a125
commit d993185b89
25 changed files with 641 additions and 0 deletions
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2
.gitignore vendored
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@@ -52,3 +52,5 @@ Module.symvers
Mkfile.old
dkms.conf
# Gdb history
.gdb_history

5
Lab02/commands.sh Normal file
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@@ -0,0 +1,5 @@
touch mioFile.c
ls -laR
cat mioFile.c
mkdir -p tmpDir
cp -f mioFile.c tmpDir

30
Lab02/executor.c Normal file
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@@ -0,0 +1,30 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define LEN 128
#define USE_LIB 0
int main(int argc, char ** argv) {
FILE *flist;
if (argc < 2) return 1;
flist = fopen(argv[1], "r");
char cmd[LEN];
while(fgets(cmd, LEN, flist)) {
if (USE_LIB) {
system(cmd);
continue;
}
if (!fork()) {
execl("/bin/sh", "sh", "-c", cmd, (char *) NULL);
} else {
sleep(3);
}
}
return 0;
}

4
Lab04/evenFile.txt Normal file
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@@ -0,0 +1,4 @@
432
65346
3214
856

11
Lab04/inFile.txt Normal file
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@@ -0,0 +1,11 @@
123
432
75
1231231
65346
3245
3214
123
6345
856
0

6
Lab04/oddFile.txt Normal file
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@@ -0,0 +1,6 @@
123
75
1231231
3245
123
6345

10
Lab04/redir.c Normal file
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@@ -0,0 +1,10 @@
//usr/bin/gcc "$0" && ./a.out < inFile.txt 1> evenFile.txt 2> oddFile.txt; rm a.out; exit
#include <stdio.h>
int main() {
int n;
while (scanf("%d", &n) != EOF && n != 0) {
fprintf((n%2) ? stderr : stdout, "%d\n", n);
}
return 0;
}

11
Lab05/ex4.sh Normal file
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@@ -0,0 +1,11 @@
#!/bin/bash
sort -r -n infile.txt
sort -k 2 infile.txt
grep "2011/2012" infile.txt
grep "INF1T3" infile.txt | sort -n
grep -P "^\d+[24] " infile.txt | sort -k 2
grep "TLC1T3" infile.txt | grep "Da frequentare" | sort -n -r
grep -P "\<\w+A\w\wA\w+\>" infile.txt
cat infile.txt | cut -d " " -f1 | tr -d 0 | tr 8 1 | sort -n | uniq
cat infile.txt | cut -d " " -f1 | tr -d 0 | tr 8 1 | sort -n | uniq -d -c

71
Lab05/infile.txt Normal file
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@@ -0,0 +1,71 @@
183658 DELL'ANNAX FRANCESCO GIUSEPPE 01OGDLM (10) INF1T3 1 Da frequentare
186988 YE YU 01OGDLM (10) INF1T3 1 Da frequentare
186840 BEN AYED AMNA 01OGDLM (10) INF1T3 1 Da frequentare
177484 KUMI PRINCE OPOKU 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
173369 WU WENAO 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
89499 DATO AGGIUNTO PER PROVA 1 (10) TLC1T3 1 Da frequentare
187747 RAHMAN NAJEEB UR 01OGDLJ (10) TLC1T3 1 Da frequentare
186946 MASOUDI TARAMSARI ZAHRA 01OGDLM (10) INF1T3 1 Da frequentare
177076 EL QORAICHI BADR 01OGDLJ (10) TLC1T3 1 Da frequentare
180946 ZEVOLA LUIGI 01OGDLM (10) INF1T3 1 Da frequentare
186888 LI LONG 01OGDLJ (10) TLC1T3 1 Da frequentare
187028 YU TENGFEI 01OGDLJ (10) TLC1T3 1 Da frequentare
187362 CHEN JIESI 01OGDLJ (10) TLC1T3 1 Da frequentare
177768 LI HUAN 01OGDLM (10) INF1T3 1 Da frequentare
94799 DATO AGGIUNTO PER PROVA 2 (10) TLC1T3 1 Da frequentare
174780 SAWORO EROMO 01OGDLJ (10) TLC1T3 1 Da frequentare
181872 GALLINA PAOLO 01OGDLM (10) INF1T3 1 Da frequentare
174826 HADDADI RASOUL 01OGDLJ (10) TLC1T3 1 Frequentato nel 2011/2012
187380 YAN YUE 01OGDLJ (10) TLC1T3 1 Da frequentare
186961 HE MUZHOU 01OGDLJ (10) TLC1T3 1 Da frequentare
176193 LODDO SELENE 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
174107 WANG HAOYI 01OGDLJ (10) TLC1T3 1 Frequentato nel 2011/2012
186433 MISTRETTA SERGIO 01OGDLJ (10) TLC1T3 1 Da frequentare
183581 SAADEH TAMER 01OGDLM (10) INF1T3 1 Da frequentare
176151 CHEN XIN 01OGDLJ (10) TLC1T3 1 Da frequentare
183534 KHOSHKHOU GILAVAEI VAHID 01OGDLM (10) INF1T3 1 Da frequentare
187780 HAXHILLARI JOVO 01OGDLM (10) INF1T3 1 Da frequentare
186955 HAN YIGE 01OGDLJ (10) TLC1T3 1 Da frequentare
180402 BETTONI MARCO 01OGDLM (10) INF1T3 1 Da frequentare
187245 QIU XIAOLING 01OGDLJ (10) TLC1T3 1 Da frequentare
185443 VARDANEGA ELIA 01OGDLJ (10) TLC1T3 1 Da frequentare
174845 HUANG HAITAO 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
183000 KARIM MERYEM 01OGDLM (10) INF1T3 1 Da frequentare
174855 LIU DONG 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
168111 KHATRI NIRANJAN 01OGDLM (10) INF1T3 1 Da frequentare
187580 CHEN WEI 01OGDLM (10) INF1T3 1 Da frequentare
187493 HUANG YANYU 01OGDLJ (10) TLC1T3 1 Da frequentare
187609 JAN MAIN MUHAMMAD FAHEEM 01OGDLM (10) INF1T3 1 Da frequentare
173809 LIU FENGXIAN 01OGDLJ (10) TLC1T3 1 Frequentato nel 2011/2012
176602 JOBARTEH MARIAMA 01OGDLM (10) INF1T3 1 Da frequentare
178503 NADEEM MUHAMMAD 01OGDLJ (10) TLC1T3 1 Frequentato nel 2011/2012
180412 IACOBUCCI ALEX 01OGDLM (10) INF1T3 1 Da frequentare
187696 LIN ZIXUAN 01OGDLM (10) INF1T3 1 Da frequentare
186992 WANG JUNHUI 01OGDLJ (10) TLC1T3 1 Da frequentare
175746 KAFAEI LOTFIE ARASH AHMAD ALESSANDRO 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
158381 KIMANI JAMES MUNYIRI 01OGDLM (10) INF1T3 1 Da frequentare
164370 CONG RUI 01OGDLM (10) INF1T3 1 Da frequentare
174308 BACCO MICHAEL 01OGDLM (10) INF1T3 1 Da frequentare
187354 ZENG LUYUAN 01OGDLJ (10) TLC1T3 1 Da frequentare
183886 UR RAHMAN ASAD 01OGDLM (10) INF1T3 1 Da frequentare
183917 TARDINI GIOVANNI 01OGDLM (10) INF1T3 1 Da frequentare
186960 MA QINGYA 01OGDLJ (10) TLC1T3 1 Da frequentare
184130 MA RUI 01OGDLJ (10) TLC1T3 1 Da frequentare
158776 ELLAHI EHSAN 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
186670 WEN SHIYU 01OGDLJ (10) TLC1T3 1 Da frequentare
186959 LI JIAO 01OGDLJ (10) TLC1T3 1 Da frequentare
174789 GE SHENFENG 01OGDLM (10) INF1T3 1 Da frequentare
187444 SUN SHU 01OGDLJ (10) TLC1T3 1 Da frequentare
174421 CIORNII VITALIE 01OGDLM (10) INF1T3 1 Da frequentare
176117 DJAPA PAGNIA SYLVAIN 01OGDLM (10) INF1T3 1 Da frequentare
186956 YU QIAN 01OGDLJ (10) TLC1T3 1 Da frequentare
173787 KANA ZEBAZE JEAN PIERRE 01OGDLJ (10) TLC1T3 1 Frequentato nel 2011/2012
183578 HUSSAIN MURAD 01OGDLM (10) INF1T3 1 Da frequentare
187166 LI HAIYAN 01OGDLJ (10) TLC1T3 1 Da frequentare
187041 FORNO EVELINA 01OGDLM (10) INF1T3 1 Da frequentare
164690 SHUKAIR WAEL 01OGDLJ (10) TLC1T3 1 Da frequentare
187432 XU GUANGHUAN 01OGDLJ (10) TLC1T3 1 Da frequentare
183548 OBEID RAFIC 01OGDLJ (10) TLC1T3 1 Da frequentare
173376 ZHAO LONGSHENG 01OGDLM (10) INF1T3 1 Frequentato nel 2011/2012
182304 SIBONA FIORELLA 01OGDLM (10) INF1T3 1 Da frequentare
186690 STRAZIMIRI ARBER 01OGDLM (10) INF1T3 1 Da frequentare

56
Lab05/pipes.c Normal file
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@@ -0,0 +1,56 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/wait.h>
void receiver(int fd);
void sender(int fd);
int main() {
int fds[2];
pipe(fds);
if (fork()) {
receiver(fds[0]);
} else if (fork()) {
sender(fds[1]);
}
wait(NULL);
}
void sender(int fd) {
char * str;
int len;
int q = 0;
while (q != EOF) {
q = scanf(" %ms", &str);
len = strlen(str);
printf("%d\n",len);
if (len == 1) break;
write(fd, &len, sizeof(int));
write(fd, str, len);
free(str);
}
close(fd);
}
void receiver(int fd) {
char * str;
int len, q = 0;
while (1) {
q = read(fd, &len, sizeof(int));
if (q == EOF) break;
str = malloc(len * sizeof(char));
q = read(fd, str, len);
if (q == EOF) break;
for (char * c = str; *c != '\0'; c++)
*c = toupper(*c);
puts(str);
free(str);
}
}

9
Lab06/bar Normal file
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@@ -0,0 +1,9 @@
2
9
5
345
312
8865
23121332
4343
35

7
Lab06/foo Normal file
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@@ -0,0 +1,7 @@
9
2
5
1
7
43
23

85
Lab06/sort.c Normal file
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@@ -0,0 +1,85 @@
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#define BUF_SIZE 2048
int **matrix;
int lines[100];
char filenames[2][10] = {"foo", "bar"};
int cmpfunc (const void * a, const void * b) {
return ( *(int*)a - *(int*)b );
}
int count_lines(FILE* file)
{
char buf[BUF_SIZE];
int counter = 0;
for(;;)
{
size_t res = fread(buf, 1, BUF_SIZE, file);
if (ferror(file))
return -1;
int i;
for(i = 0; i < res; i++)
if (buf[i] == '\n')
counter++;
if (feof(file))
break;
}
return counter;
}
void *sort(void * vargs) {
int num = (int) vargs;
FILE * fin = fopen(filenames[num], "r");
lines[num] = count_lines(fin);
fseek(fin,0L,SEEK_SET);
matrix[num] = malloc(lines[num]*sizeof(int));
for (int i = 0; i < lines[num]; i++) fscanf(fin, "%d", &matrix[num][i]);
fclose(fin);
qsort(matrix[num], lines[num], sizeof(int), cmpfunc);
return NULL;
}
int main(int argc, char ** argv) {
pthread_t tids[2];
int tmp[1000], res[1000], cur_len;
matrix = malloc(2*sizeof(int *));
pthread_create(&tids[0], NULL, sort, (void *)0);
pthread_create(&tids[1], NULL, sort, (void *)1);
for (int i = 0; i<2; i++) {
pthread_join(tids[i], NULL);
if (i == 0) {
memcpy(res, matrix[i], sizeof(int)*lines[i]);
cur_len = lines[i];
continue;
}
int a = 0, b = 0, j = 0;
while (a<cur_len && b<lines[i]) {
tmp[j++] = (res[a] > matrix[i][b]) ? matrix[i][b++] : res[a++];
}
while (a<cur_len) tmp[j++] = res[a++];
while (b<lines[i]) tmp[j++] = matrix[i][b++];
cur_len += lines[i];
memcpy(res, tmp, sizeof(int)*cur_len);
}
for (int i = 0; i<cur_len;i++) {
printf("%d ",res[i]);
}
return 0;
}

3
Lab07/es1.sh Normal file
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@@ -0,0 +1,3 @@
#!/bin/bash -v
grep -rHn "$2" $1 | sort -t ":" -k 1,1 -k 2,2rn > $3

9
Lab07/es2.sh Normal file
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@@ -0,0 +1,9 @@
#!/bin/bash
for line in $(cat $1)
do
echo $line | wc -m
done | sort -r -n | head -n 1
wc -l $1

24
Lab07/es4.sh Normal file
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@@ -0,0 +1,24 @@
#!/bin/bash
declare -A acr
if [ $# -ne 1 ]
then
echo "Missing filename"
exit 1
fi
for word in `cat $1`
do
if [ -v "acr[$word]" ]
then
acr[$word]=$((acr[$word]+1))
else
acr[$word]=1
fi
done
for key in ${!acr[*]}
do
echo "${key}: ${acr[$key]}"
done

22
Lab07/es5.sh Normal file
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@@ -0,0 +1,22 @@
#!/bin/bash
finds=0
while :
do
line=$(ps -el | tr -s " " | cut -d " " -f 2,4,14 | grep $1 | cut -d " " -f 1,2)
if [[ $(echo $line | cut -d " " -f 1) = "Z" ]]
then
let finds++
if [[ $finds -ge 5 ]]; then
pid=$(echo $line | cut -d " " -f 2)
kill -9 $pid
echo "Killed process $pid"
exit 0
fi
elif [[ $finds -ne 0 ]]
then
finds=0
fi
sleep $2
done

3
Lab07/input.txt Normal file
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@@ -0,0 +1,3 @@
the imagination of nature is far
far greater than the imagination
of man

28
Lab08/ex1.c Normal file
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@@ -0,0 +1,28 @@
int ticketNumber;
int turnNumber;
int atomicIncrement (int *var) {
int tmp = *var;
*var = tmp + 1;
return (tmp);
}
void init() {
ticketNumber = 0;
turnNumber = 0;
}
void lock() {
int ticket = atomicIncrement(&ticketNumber);
while (ticket != turnNumber);
void unlock() {
atomicIncrement(turnNumber);
}
int main() {
}

80
Lab08/ex2.c Normal file
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@@ -0,0 +1,80 @@
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
typedef int * sem;
sem sem_init() {
sem s = calloc(2, sizeof(int));
pipe(s);
return s;
}
void sem_lock(sem s) {
int tmp;
if (read(s[0], &tmp, 1)<0) exit(1);
}
void sem_multi_lock(sem s, int n) {
for (int i = 0; i < n; i++) sem_lock(s);
}
void sem_signal(sem s) {
if (write(s[1], "0", 1)<0) exit(1);
}
void A(sem sB, sem sC, sem sD) {
puts("A");
sem_signal(sB);
sem_signal(sC);
sem_signal(sD);
}
void single_proc(sem x, sem y, int N, char * name) {
sem_multi_lock(x, N);
puts(name);
sem_signal(y);
}
void C(sem sC, sem sE, sem sF) {
sem_lock(sC);
puts("C");
sem_signal(sE);
sem_signal(sF);
}
int main() {
sem sA, sB, sC, sD, sE, sF, sG, sH, sI;
sA = sem_init();
sB = sem_init();
sC = sem_init();
sD = sem_init();
sE = sem_init();
sF = sem_init();
sG = sem_init();
sH = sem_init();
sI = sem_init();
while(1) {
if (!fork()) {
A(sB,sC,sD);
} else if (!fork()) {
single_proc(sB, sI, 1, "B");
} else if (!fork()) {
C(sC, sE, sF);
} else if (!fork()) {
single_proc(sD, sH, 1, "D");
} else if (!fork()) {
single_proc(sE, sG, 1, "E");
} else if (!fork()) {
single_proc(sF, sG, 1, "F");
} else if (!fork()) {
single_proc(sG, sI, 2, "G");
} else if (!fork()) {
single_proc(sH, sI, 1, "H");
} else if (!fork()) {
single_proc(sI, sA, 3, "I");
}
sem_lock(sA);
sleep(5);
}
}

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Lab08/ex4.c Normal file
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@@ -0,0 +1,57 @@
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
sem_t *sems[6];
typedef struct params {
int sPrev;
int sNext;
int nPrev;
int nNext;
char * name;
} *params_t;
void* t_code(void * arg) {
params_t p = (params_t) arg;
while (1) {
for (int i = 0; i < p->nPrev; i++) sem_wait(sems[p->sPrev]);
puts(p->name);
sleep(3);
for (int i = 0; i < p->nNext; i++) sem_post(sems[p->sNext]);
}
free(p);
}
pthread_t* start_t(int sPrev, int sNext, int nPrev, int nNext, char * name) {
pthread_t *t;
params_t p = malloc(sizeof(struct params));
p->sPrev = sPrev;
p->sNext = sNext;
p->nPrev = nPrev;
p->nNext = nNext;
p->name = name;
pthread_create(t, NULL, t_code, (void *) p);
return t;
}
int main() {
for (int i = 0; i < 6; i++) {
sems[i] = malloc(sizeof(sem_t));
sem_init(sems[i], 0, 0);
}
sem_post(sems[0]);
start_t(0, 1, 1, 3, "A");
start_t(1, 2, 1, 1, "B");
start_t(1, 3, 1, 2, "C");
start_t(1, 4, 1, 1, "D");
start_t(3, 5, 1, 1, "E");
start_t(3, 5, 1, 1, "F");
start_t(5, 2, 1, 1, "G");
start_t(4, 2, 1, 1, "H");
start_t(2, 0, 3, 1, "I");
sleep(24);
}

7
Lab09/a.txt Normal file
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@@ -0,0 +1,7 @@
1 2 4
3 6.3 1
2 3 9
3 12 5
2 1 23
3 12 4

21
Lab09/conv.c Normal file
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@@ -0,0 +1,21 @@
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
int main() {
FILE * fin = fopen("a.txt","r");
int fout = open("test",O_CREAT|O_WRONLY);
float c,x;
int n;
while(fscanf(fin, "%f %f %d\n", &c, &x, &n) == 3) {
write(fout,&c,sizeof(float));
write(fout,&x,sizeof(float));
write(fout,&n,sizeof(int));
puts("ed uno");
}
fclose(fin);
close(fout);
}

79
Lab09/es2.c Normal file
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@@ -0,0 +1,79 @@
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#define M_LEN (sizeof(int)+2*sizeof(float))
sem_t *sR;
sem_t *sC[3];
sem_t *sM[3];
float res[3];
int line = 0;
int fin;
void* compute(void* arg) {
int id = *((int *) arg);
free(arg);
int n;
float c, x;
while(1) {
sem_wait(sM[id]);
sem_wait(sR);
int r = lseek(fin, (line*3+id)*M_LEN, SEEK_SET);
if (r == -1) {
pthread_exit(NULL);
}
read(fin, &c, sizeof(float));
read(fin, &x, sizeof(float));
read(fin, &n, sizeof(int));
printf("%d-%d-%d: %f %f %d\n",id,line,r,c,x,n);
sem_post(sR);
res[id] = c;
for (int i = 0; i<n;i++)
res[id]*=x;
sem_post(sC[id]);
}
}
void* merge(void* arg) {
while (1) {
float sum = 0;
for (int i = 0; i < 3; i++) {
sem_wait(sC[i]);
sum += res[i];
}
printf("%f\n", sum);
sleep(3);
line++;
sem_post(sM[0]);
sem_post(sM[1]);
sem_post(sM[2]);
}
}
int main(int argc, char ** argv) {
pthread_t t;
fin = open(argv[1], O_RDONLY);
if (fin == NULL) exit(1);
sR = malloc(sizeof(sem_t));
sem_init(sR,0,1);
for (int i = 0; i<3;i++) {
int * arg=malloc(sizeof(int));
*arg=i;
sC[i] = malloc(sizeof(sem_t));
sM[i] = malloc(sizeof(sem_t));
sem_init(sC[i],0,0);
sem_init(sM[i],0,1);
pthread_create(&t,NULL,compute,(void *)arg);
}
pthread_create(&t,NULL,merge,NULL);
pthread_join(t,NULL);
close(fin);
}

1
README.md
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@@ -1,2 +1,3 @@
# Laboratori-OS
A collection of exercises taken from the Operating system course at PoliTO (year 2023).