Prova pratica 2017.01.17 - Revision history

FedericoB: Aggiunti testi esercizi

2017-05-15T14:55:59Z

Aggiunti testi esercizi

GabrieleCalarota at 10:17, 15 May 2017

2017-05-15T10:17:20Z

Ossigeno at 21:01, 2 May 2017

2017-05-02T21:01:13Z

Renzo: Created page with " #include #include #include #include #include #include struct fileelem { dev_t ..."

2017-05-02T13:16:53Z

Created page with "<syntaxhighlight lang=C> #include <stdio.h> #include <stdlib.h> #include <dirent.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> struct fileelem { dev_t ..."

New page

<syntaxhighlight lang=C>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>

struct fileelem {
dev_t dev;
ino_t ino;
struct fileelem *next;
};

int addfile(struct fileelem **head, dev_t dev, ino_t ino) {
if (*head == NULL) {
*head = malloc(sizeof(struct fileelem));
(*head)->dev = dev;
(*head)->ino = ino;
(*head)->next = NULL;
return 1;
} else if ((*head)->dev == dev && (*head)->ino == ino) {
return 0;
} else {
return addfile(&((*head)->next), dev, ino);
}
}

int filt(const struct dirent *elem) {
if (strcmp(elem->d_name,".") == 0 ||
strcmp(elem->d_name,"..") == 0)
return 0;
else {
return 1;
}
}

int recscan(char *path, struct fileelem **head) {
struct dirent **list;
int count = 0;
int n = scandir(path, &list, filt, alphasort);
int i;
for (i = 0; i < n; i++) {
struct stat buf;
char *filepath;
asprintf(&filepath,"%s/%s",path,list[i]->d_name);
stat(filepath, &buf);
switch (buf.st_mode & S_IFMT) {
case S_IFREG:
count += addfile(head, buf.st_dev, buf.st_ino);
printf("file %s %ld %ld ... %d\n",filepath,buf.st_dev,buf.st_ino,count);
break;
case S_IFDIR:
count = count + recscan(filepath, head);
break;
}
free(filepath);
free(list[i]);
}
free(list);
return count;
}

int main(int argc, char *argv[]) {
struct fileelem *head = NULL;
int result;
if (argc > 1)
chdir(argv[1]);
result = recscan(".", &head);
printf("Num of independent files: %d\n", result);
}

</syntaxhighlight>

@@ Line 1: / Line 1: @@
-==Esercizio1==
+[http://www.cs.unibo.it/~renzo/so/pratiche/2017.01.17.pdf link al testo]
 <syntaxhighlight lang=C>
 #include <stdio.h>
@@ Line 75: / Line 84: @@
 ==Esercizio 3:==
 ===Python===
 <syntaxhighlight lang=Python>
@@ Line 100: / Line 117: @@
          print("Mancano degli argomenti")
 </syntaxhighlight>
 ===Bash===
 <syntaxhighlight lang=Bash>
 #!/bin/bash

@@ Line 1: / Line 1: @@
 <syntaxhighlight lang=C>
 #include <stdio.h>
@@ Line 73: / Line 74: @@
 </syntaxhighlight>
-Esercizio 3:
+==Esercizio 3:==
-Python
+===Python===
 <syntaxhighlight lang=Python>
@@ Line 99: / Line 100: @@
          print("Mancano degli argomenti")
 </syntaxhighlight>

← Older revision		Revision as of 21:01, 2 May 2017
Line 71:		Line 71:
	}		}

		+	</syntaxhighlight>
		+
		+	Esercizio 3:
		+	Python
		+
		+	<syntaxhighlight lang=Python>
		+	def merge(): # dati due path di due directory, fa la merge in una terza directory
		+	# 1=pathprimo 2=pathsecondo 3=pathdestinazione
		+	if (len(sys.argv) > 3):
		+	for d, _, fl in os.walk(sys.argv[1]):
		+	for f in fl:
		+	path = os.path.join(d, f)
		+	if (os.path.isfile(path)): # e' un file e non una directory allora copio tutto
		+	shutil.copy2(path, sys.argv[3])
		+	for d, _, fl in os.walk(sys.argv[2]):
		+	for f in fl:
		+	path = os.path.join(d, f)
		+	if (os.path.isfile(path)): # e' un file e non una directory in path2
		+	esistenza = os.path.join(sys.argv[3], f)
		+	if (not os.path.isfile(esistenza)): # se non esiste un file con quel nome
		+	shutil.copy2(path, sys.argv[3])
		+	else:
		+	if (os.stat(path).st_mtime > os.stat(
		+	esistenza).st_mtime): # e' piu recente tempo del file in path2 rispetto a path3
		+	shutil.copy2(path, sys.argv[3])
		+	else:
		+	print("Mancano degli argomenti")
	</syntaxhighlight>		</syntaxhighlight>