ENSEEIHT/projet-systeme-exploitation-centralise
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This commit is contained in:
Laureηt 2021-04-21 14:15:14 +02:00
parent 4b500002f6
commit db5b7a582d
6 changed files with 124 additions and 78 deletions
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22
jobs.c
View file

@ -8,7 +8,6 @@ void ajouter(list *l_ptr, int pid, int id, char** seq)
cell *new_cell = malloc(sizeof(*new_cell));
char *cmd;
cmd = malloc(sizeof(char) * 256);
cmd[0] = '\0';
@ -35,7 +34,7 @@ void ajouter(list *l_ptr, int pid, int id, char** seq)
*l_ptr = new_cell;
printf("[%d] %d\n", id, pid);
printf("[%d] %d %s\n", id, pid, cmd);
}
void supprimer(list *l_ptr, int pid)
@ -47,6 +46,7 @@ void supprimer(list *l_ptr, int pid)
{
cell *cursor2free = cursor;
*l_ptr = cursor->next;
printf("[%d] (%d) done: %s\n", cursor->id, cursor->pid, cursor->cmd);
free(cursor2free);
}
else
@ -63,6 +63,7 @@ void supprimer(list *l_ptr, int pid)
}
}
cell *cursor_next = cursor->next->next;
printf("[%d] (%d) done: %s\n", cursor->id, cursor->pid, cursor->cmd);
free(cursor->next);
cursor->next = cursor_next;
}
@ -98,7 +99,6 @@ int est_vide(list l_ptr)
int contiens(list *l_ptr, int pid)
{
cell *cursor = *l_ptr;
while (cursor != NULL)
@ -112,3 +112,19 @@ int contiens(list *l_ptr, int pid)
return 0;
}
cell *trouver(list *l_ptr, int pid)
{
cell *cursor = *l_ptr;
while (cursor != NULL)
{
if (cursor->pid == pid)
{
return cursor;
}
cursor = cursor->next;
}
return NULL; // erreur
}

3
jobs.h
View file

@ -2,7 +2,8 @@
#define __JOBS_H
typedef struct cell cell;
struct cell {
struct cell
{
int id;
int pid;
char *cmd;

BIN
minishell
View file

Binary file not shown.

7
minishell.c
View file

@ -15,6 +15,7 @@ int prompting = 0;
int job_id = 1;
list jobs;
pid_t pidFils;
struct cmdline *cmd;
jmp_buf start;
@ -27,8 +28,6 @@ void handler_print(int signal_num, siginfo_t *info)
printf("\n");
}
// TODO: trouver id, cmd... à partir pid
printf("[%d] --> (%d) %s\n", info->si_pid, signal_num, strsignal(signal_num));
supprimer(&jobs, info->si_pid);
job_id--;
@ -50,7 +49,7 @@ void handler_stop(int signal_num, siginfo_t *info)
if (!prompting)
{
kill(pidFils, SIGTSTP);
//ajouter(&jobs, pidFils, job_id++, cmd);
ajouter(&jobs, pidFils, job_id++, *(cmd->seq));
siglongjmp(start, signal_num);
}
else
@ -93,7 +92,7 @@ int main(int argc, char *argv[])
printf("%s >>> ", currentcd);
prompting = 1;
struct cmdline *cmd = readcmd();
cmd = readcmd();
prompting = 0;
if (cmd == NULL)

117
readcmd.c
View file

@ -14,7 +14,6 @@
#include <string.h>
#include "readcmd.h"
static void memory_error(void)
{
errno = ENOMEM;
@ -22,49 +21,52 @@ static void memory_error(void)
exit(1);
}
static void *xmalloc(size_t size)
{
void *p = malloc(size);
if (!p) memory_error();
if (!p)
memory_error();
return p;
}
static void *xrealloc(void *ptr, size_t size)
{
void *p = realloc(ptr, size);
if (!p) memory_error();
if (!p)
memory_error();
return p;
}
/* Read a line from standard input and put it in a char[] */
static char *readline(void)
{
size_t buf_len = 16;
char *buf = xmalloc(buf_len * sizeof(char));
if (fgets(buf, buf_len, stdin) == NULL) {
if (fgets(buf, buf_len, stdin) == NULL)
{
free(buf);
return NULL;
}
do {
do
{
size_t l = strlen(buf);
if ((l > 0) && (buf[l-1] == '\n')) {
if ((l > 0) && (buf[l - 1] == '\n'))
{
l--;
buf[l] = 0;
return buf;
}
if (buf_len >= (INT_MAX / 2)) memory_error();
if (buf_len >= (INT_MAX / 2))
memory_error();
buf_len *= 2;
buf = xrealloc(buf, buf_len * sizeof(char));
if (fgets(buf + l, buf_len - l, stdin) == NULL) return buf;
if (fgets(buf + l, buf_len - l, stdin) == NULL)
return buf;
} while (1);
}
/* Split the string in words, according to the simple shell grammar. */
static char **split_in_words(char *line)
{
@ -73,10 +75,12 @@ static char **split_in_words(char *line)
size_t l = 0;
char c;
while ((c = *cur) != 0) {
while ((c = *cur) != 0)
{
char *w = 0;
char *start;
switch (c) {
switch (c)
{
case ' ':
case '\t':
/* Ignore any whitespace */
@ -101,9 +105,11 @@ static char **split_in_words(char *line)
default:
/* Another word */
start = cur;
while (c) {
while (c)
{
c = *++cur;
switch (c) {
switch (c)
{
case 0:
case ' ':
case '\t':
@ -120,7 +126,8 @@ static char **split_in_words(char *line)
strncpy(w, start, cur - start);
w[cur - start] = 0;
}
if (w) {
if (w)
{
tab = xrealloc(tab, (l + 1) * sizeof(char *));
tab[l++] = w;
}
@ -130,31 +137,33 @@ static char **split_in_words(char *line)
return tab;
}
static void freeseq(char ***seq)
{
int i, j;
for (i=0; seq[i]!=0; i++) {
for (i = 0; seq[i] != 0; i++)
{
char **cmd = seq[i];
for (j=0; cmd[j]!=0; j++) free(cmd[j]);
for (j = 0; cmd[j] != 0; j++)
free(cmd[j]);
free(cmd);
}
free(seq);
}
/* Free the fields of the structure but not the structure itself */
static void freecmd(struct cmdline *s)
{
if (s->in) free(s->in);
if (s->out) free(s->out);
if (s->in)
free(s->in);
if (s->out)
free(s->out);
// if (s->backgrounded) free(s->backgrounded);
if (s->seq) freeseq(s->seq);
if (s->seq)
freeseq(s->seq);
}
struct cmdline *readcmd(void)
{
static struct cmdline *static_cmdline = 0;
@ -168,8 +177,10 @@ struct cmdline *readcmd(void)
size_t cmd_len, seq_len;
line = readline();
if (line == NULL) {
if (s) {
if (line == NULL)
{
if (s)
{
freecmd(s);
free(s);
}
@ -197,10 +208,13 @@ struct cmdline *readcmd(void)
s->seq = 0;
i = 0;
while ((w = words[i++]) != 0) {
switch (w[0]) {
while ((w = words[i++]) != 0)
{
switch (w[0])
{
case '&':
if(s->backgrounded){
if (s->backgrounded)
{
s->err = "error on &";
goto error;
}
@ -208,11 +222,13 @@ struct cmdline *readcmd(void)
break;
case '<':
/* Tricky : the word can only be "<" */
if (s->in) {
if (s->in)
{
s->err = "only one input file supported";
goto error;
}
if (words[i] == 0) {
if (words[i] == 0)
{
s->err = "filename missing for input redirection";
goto error;
}
@ -220,11 +236,13 @@ struct cmdline *readcmd(void)
break;
case '>':
/* Tricky : the word can only be ">" */
if (s->out) {
if (s->out)
{
s->err = "only one output file supported";
goto error;
}
if (words[i] == 0) {
if (words[i] == 0)
{
s->err = "filename missing for output redirection";
goto error;
}
@ -232,7 +250,8 @@ struct cmdline *readcmd(void)
break;
case '|':
/* Tricky : the word can only be "|" */
if (cmd_len == 0) {
if (cmd_len == 0)
{
s->err = "misplaced pipe";
goto error;
}
@ -252,22 +271,28 @@ struct cmdline *readcmd(void)
}
}
if (cmd_len != 0) {
if (cmd_len != 0)
{
seq = xrealloc(seq, (seq_len + 2) * sizeof(char **));
seq[seq_len++] = cmd;
seq[seq_len] = 0;
} else if (seq_len != 0) {
}
else if (seq_len != 0)
{
s->err = "misplaced pipe";
i--;
goto error;
} else
}
else
free(cmd);
free(words);
s->seq = seq;
return s;
error:
while ((w = words[i++]) != 0) {
switch (w[0]) {
while ((w = words[i++]) != 0)
{
switch (w[0])
{
case '<':
case '>':
case '|':
@ -279,17 +304,21 @@ error:
}
free(words);
freeseq(seq);
for (i=0; cmd[i]!=0; i++) free(cmd[i]);
for (i = 0; cmd[i] != 0; i++)
free(cmd[i]);
free(cmd);
if (s->in) {
if (s->in)
{
free(s->in);
s->in = 0;
}
if (s->out) {
if (s->out)
{
free(s->out);
s->out = 0;
}
if (s->backgrounded) {
if (s->backgrounded)
{
// free(s->backgrounded);
s->out = 0;
}

3
readcmd.h
View file

@ -14,7 +14,8 @@ struct cmdline *readcmd(void);
* - en cas d'appels successifs,
* readcmd() réutilise la mémoire allouée à la structure cmdline qu'elle retourne
*/
struct cmdline {
struct cmdline
{
char *err; /* Si non null : message d'erreur à afficher.
* Dans ce cas, les autres champs sont nuls. */
char *in; /* Si non null : nom du fichier vers lequel l'entrée doit être redirigée. */