...

SCR3.1/TP2/,

@@ -1,158 +0,0 @@
-DD(1)                            User Commands                           DD(1)
-
-NAME
-       dd - convert and copy a file
-
-SYNOPSIS
-       dd [OPERAND]...
-       dd OPTION
-
-DESCRIPTION
-       Copy a file, converting and formatting according to the operands.
-
-       bs=BYTES
-              read and write up to BYTES bytes at a time (default: 512); over‐
-              rides ibs and obs
-
-       cbs=BYTES
-              convert BYTES bytes at a time
-
-       conv=CONVS
-              convert the file as per the comma separated symbol list
-
-       count=N
-              copy only N input blocks
-
-       ibs=BYTES
-              read up to BYTES bytes at a time (default: 512)
-
-       if=FILE
-              read from FILE instead of stdin
-
-       iflag=FLAGS
-              read as per the comma separated symbol list
-
-       obs=BYTES
-              write BYTES bytes at a time (default: 512)
-
-       of=FILE
-              write to FILE instead of stdout
-
-       oflag=FLAGS
-              write as per the comma separated symbol list
-
-       seek=N (or oseek=N) skip N obs-sized output blocks
-
-       skip=N (or iseek=N) skip N ibs-sized input blocks
-
-       status=LEVEL
-              The  LEVEL  of information to print to stderr; ’none’ suppresses
-              everything but error messages,  ’noxfer’  suppresses  the  final
-              transfer  statistics, ’progress’ shows periodic transfer statis‐
-              tics
-
-       N and BYTES may be followed by the following  multiplicative  suffixes:
-       c=1,  w=2,  b=512,  kB=1000,  K=1024,  MB=1000*1000, M=1024*1024, xM=M,
-       GB=1000*1000*1000, G=1024*1024*1024, and so on for T, P, E, Z, Y, R, Q.
-       Binary prefixes can be used, too: KiB=K, MiB=M, and so on.  If  N  ends
-       in ’B’, it counts bytes not blocks.
-
-       Each CONV symbol may be:
-
-       ascii  from EBCDIC to ASCII
-
-       ebcdic from ASCII to EBCDIC
-
-       ibm    from ASCII to alternate EBCDIC
-
-       block  pad newline-terminated records with spaces to cbs-size
-
-       unblock
-              replace trailing spaces in cbs-size records with newline
-
-       lcase  change upper case to lower case
-
-       ucase  change lower case to upper case
-
-       sparse try to seek rather than write all-NUL output blocks
-
-       swab   swap every pair of input bytes
-
-       sync   pad  every  input  block  with  NULs to ibs-size; when used with
-              block or unblock, pad with spaces rather than NULs
-
-       excl   fail if the output file already exists
-
-       nocreat
-              do not create the output file
-
-       notrunc
-              do not truncate the output file
-
-       noerror
-              continue after read errors
-
-       fdatasync
-              physically write output file data before finishing
-
-       fsync  likewise, but also write metadata
-
-       Each FLAG symbol may be:
-
-       append append mode (makes sense  only  for  output;  conv=notrunc  sug‐
-              gested)
-
-       direct use direct I/O for data
-
-       directory
-              fail unless a directory
-
-       dsync  use synchronized I/O for data
-
-       sync   likewise, but also for metadata
-
-       fullblock
-              accumulate full blocks of input (iflag only)
-
-       nonblock
-              use non-blocking I/O
-
-       noatime
-              do not update access time
-
-       nocache
-              Request to drop cache.  See also oflag=sync
-
-       noctty do not assign controlling terminal from file
-
-       nofollow
-              do not follow symlinks
-
-       Sending a USR1 signal to a running ’dd’ process makes it print I/O sta‐
-       tistics to standard error and then resume copying.
-
-       Options are:
-
-       --help display this help and exit
-
-       --version
-              output version information and exit
-
-AUTHOR
-       Written by Paul Rubin, David MacKenzie, and Stuart Kemp.
-
-REPORTING BUGS
-       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
-       Report any translation bugs to <https://translationproject.org/team/>
-
-COPYRIGHT
-       Copyright  ©  2023  Free Software Foundation, Inc.  License GPLv3+: GNU
-       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
-       This is free software: you are free  to  change  and  redistribute  it.
-       There is NO WARRANTY, to the extent permitted by law.
-
-SEE ALSO
-       Full documentation <https://www.gnu.org/software/coreutils/dd>
-       or available locally via: info '(coreutils) dd invocation'
-
-GNU coreutils 9.3                 April 2023                             DD(1)

SCR3.1/TP2/eraser.c

@@ -3,21 +3,26 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+#define BLOCK_SIZE 1
 
 int main(int argc, char **argv){
-	int fd, read_bytes, wrote_bytes;
+	int fd, fd1;
+        ssize_t	read_bytes, wrote_bytes;
+	char buf[BLOCK_SIZE];
+	char *name;
 	if (argc != 2){
 		printf("Usage : %s <path_to_the_file_to_erase>", argv[0]);
 		exit(EXIT_FAILURE);
 	}
-	struct stat sf;
+	struct stat sb;
 	if (stat(argv[1], &sb) == -1){
 		perror("stat");
 		exit(EXIT_FAILURE);
 	}
-	if (sb.st_nlink >= (nlink_t) 1) {
+	if (sb.st_nlink > (nlink_t) 1) {
-		unlink(argv[0]);
+		unlink(argv[1]);
 		exit(EXIT_FAILURE);
 	}
 	else {
@@ -26,7 +31,22 @@ int main(int argc, char **argv){
 			perror("fd");
 			exit(EXIT_SUCCESS);
 		}
+		while (read_bytes = read(fd,buf,BLOCK_SIZE) > 0) {
+			wrote_bytes = write(fd,"0xff",BLOCK_SIZE);
+		}
 
+		fd1 = open("/dev/urandom", O_RDONLY);
+		while (read(fd, buf, BLOCK_SIZE) > 0) {
+			read_bytes = read(fd1, buf, BLOCK_SIZE);
+			wrote_bytes = write(fd, buf, BLOCK_SIZE);
+		}
+		srand(time(NULL));
+		name = "file" + (char) rand() + ".crypt";
+		rename(argv[1], name);
+		unlink(name);
+	}
+	close(fd);
+	close(fd1);
 	return EXIT_SUCCESS;
 }
 

SCR3.1/TP2/test

@@ -0,0 +1 @@
+Eh

SCR3.1/TP3/cat

@@ -0,0 +1 @@
+Il est 22:26 ,et nous sommes mardi ! input

SCR3.1/TP3/ex5.c

@@ -1,35 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <unistd.h>
-
-#define SIZE 1000
-int search(const unsigned char * t,int start,int end)
-{
-	for (int i = start; i <= end; i++){
-		int 
-
-}
-
-int main(int argc , char * argv[])
-{
-	int i;
-	unsigned char arr[SIZE];
-
-	srandom(time(NULL));
-
-	for (i = 0; i < SIZE; i++)
-		arr[i] = (unsigned char) (random() % 255) + 1;
-
-	printf("Enter a number between 0 and %d: ", SIZE);
-	scanf(" %d", &i);
-	if (i >= 0 && i < SIZE) arr[i] = 0;
-
-	if (search(arr,0,SIZE-1)) 
-		printf("Found !\n");
-	else 
-		printf("Not found !\n");
-	return EXIT_SUCCES;
-}
-
-

SCR3.1/TP3/input

@@ -1 +1,2 @@
-La voie lactée, les gros yeux, le bonheur d'une impératrice
+Coucou
+Il est 22:26 ,et nous sommes mardi !

SCR3.1/TP3/output

@@ -1 +1,3 @@
-La voie lactée, les gros yeux, le bonheur dune' impératrice
+Coucou
+lI est 22:26 ,et nous smmes mardi !
+o

SCR3.1/TP4/mytimeout.c

@@ -1,24 +1,41 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <signal.h>
+#include "helpers.c"
+#include "helpers.h"
+#define BUF_SIZE 256
 
 void kill_son(int){
-	if
+	if (waitpid(-1,NULL,WNOHANG)==0)
+		kill(0, SIGKILL);
+}
 int main(int argc, char **argv){
+	char* args[argc - 2];
+	char path[BUF_SIZE] = "/usr/bin/";
+	int secondes = (int) strtod(argv[1], NULL);
+	pid_t p;
 	if (argc < 3){
 		printf("Usage : %s <nbsec> <com> [arg]", argv[0]);
 		return EXIT_FAILURE;
 	}
-	int secondes = (int) strtod(argv[1], NULL);
+	strcat(path, argv[2]);
-	pid_t p;
+	for (int i = 2; i < argc; i++)
+		args[i - 2] = argv[i];
 	p = fork();
 	switch(p){
-		case 0 :
+		case 0:
-
+			execv(path, args);
-			execl("/usr/bin/sh" , "-c", argv[2]) 
+			exit(0);
 		case -1:
-
+			exit(EXIT_FAILURE);
 		default:
-
+			alarm(secondes);
+			set_signal_handler(SIGALRM, &kill_son);
+			sleep(secondes);
+	}
+	exit(0);
+}

SCR3.1/TP4/test.c

@@ -1,8 +1,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int main(){
+int main(int argc, char** argv){
-	int t[4] = {1, 2, 3, 4}, u[2] = t[1:];
+	int t[4] = {1, 2, 3, 4};
+	char* args;
+	for (int i = 0; i < argc; i++){
+		args += argv[i];
+	}
 	return 0;
 }