Merge branch 'master' of dwarves.iut-fbleau.fr:ngwalang/SCR
Just an error !!
This commit is contained in:
commit
b9fa8c4dce
158
SCR3.1/TP2/,
158
SCR3.1/TP2/,
@ -1,158 +0,0 @@
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[4mDD[24m(1) User Commands [4mDD[24m(1)
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[1mNAME[0m
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dd - convert and copy a file
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[1mSYNOPSIS[0m
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[1mdd [22m[[4mOPERAND[24m]...
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[1mdd [4m[22mOPTION[0m
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[1mDESCRIPTION[0m
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Copy a file, converting and formatting according to the operands.
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bs=BYTES
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read and write up to BYTES bytes at a time (default: 512); over‐
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rides ibs and obs
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cbs=BYTES
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convert BYTES bytes at a time
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conv=CONVS
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convert the file as per the comma separated symbol list
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count=N
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copy only N input blocks
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ibs=BYTES
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read up to BYTES bytes at a time (default: 512)
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if=FILE
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read from FILE instead of stdin
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iflag=FLAGS
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read as per the comma separated symbol list
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obs=BYTES
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write BYTES bytes at a time (default: 512)
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of=FILE
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write to FILE instead of stdout
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oflag=FLAGS
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write as per the comma separated symbol list
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seek=N (or oseek=N) skip N obs-sized output blocks
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skip=N (or iseek=N) skip N ibs-sized input blocks
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status=LEVEL
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The LEVEL of information to print to stderr; ’none’ suppresses
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everything but error messages, ’noxfer’ suppresses the final
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transfer statistics, ’progress’ shows periodic transfer statis‐
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tics
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N and BYTES may be followed by the following multiplicative suffixes:
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c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, xM=M,
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GB=1000*1000*1000, G=1024*1024*1024, and so on for T, P, E, Z, Y, R, Q.
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Binary prefixes can be used, too: KiB=K, MiB=M, and so on. If N ends
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in ’B’, it counts bytes not blocks.
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Each CONV symbol may be:
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ascii from EBCDIC to ASCII
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ebcdic from ASCII to EBCDIC
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ibm from ASCII to alternate EBCDIC
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block pad newline-terminated records with spaces to cbs-size
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unblock
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replace trailing spaces in cbs-size records with newline
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lcase change upper case to lower case
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ucase change lower case to upper case
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sparse try to seek rather than write all-NUL output blocks
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swab swap every pair of input bytes
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sync pad every input block with NULs to ibs-size; when used with
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block or unblock, pad with spaces rather than NULs
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excl fail if the output file already exists
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nocreat
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do not create the output file
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notrunc
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do not truncate the output file
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noerror
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continue after read errors
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fdatasync
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physically write output file data before finishing
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fsync likewise, but also write metadata
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Each FLAG symbol may be:
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append append mode (makes sense only for output; conv=notrunc sug‐
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gested)
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direct use direct I/O for data
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directory
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fail unless a directory
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dsync use synchronized I/O for data
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sync likewise, but also for metadata
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fullblock
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accumulate full blocks of input (iflag only)
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nonblock
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use non-blocking I/O
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noatime
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do not update access time
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nocache
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Request to drop cache. See also oflag=sync
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noctty do not assign controlling terminal from file
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nofollow
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do not follow symlinks
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Sending a USR1 signal to a running ’dd’ process makes it print I/O sta‐
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tistics to standard error and then resume copying.
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Options are:
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[1m--help [22mdisplay this help and exit
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[1m--version[0m
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output version information and exit
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[1mAUTHOR[0m
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Written by Paul Rubin, David MacKenzie, and Stuart Kemp.
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[1mREPORTING BUGS[0m
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GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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Report any translation bugs to <https://translationproject.org/team/>
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[1mCOPYRIGHT[0m
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Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU
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GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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[1mSEE ALSO[0m
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Full documentation <https://www.gnu.org/software/coreutils/dd>
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or available locally via: info '(coreutils) dd invocation'
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GNU coreutils 9.3 April 2023 [4mDD[24m(1)
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BIN
SCR3.1/TP2/copy
BIN
SCR3.1/TP2/copy
Binary file not shown.
Binary file not shown.
@ -3,21 +3,26 @@
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <time.h>
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#define BLOCK_SIZE 1
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int main(int argc, char **argv){
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int fd, read_bytes, wrote_bytes;
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int fd, fd1;
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ssize_t read_bytes, wrote_bytes;
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char buf[BLOCK_SIZE];
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char *name;
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if (argc != 2){
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printf("Usage : %s <path_to_the_file_to_erase>", argv[0]);
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exit(EXIT_FAILURE);
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}
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struct stat sf;
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struct stat sb;
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if (stat(argv[1], &sb) == -1){
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perror("stat");
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exit(EXIT_FAILURE);
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}
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if (sb.st_nlink >= (nlink_t) 1) {
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unlink(argv[0]);
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if (sb.st_nlink > (nlink_t) 1) {
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unlink(argv[1]);
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exit(EXIT_FAILURE);
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}
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else {
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@ -26,7 +31,22 @@ int main(int argc, char **argv){
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perror("fd");
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exit(EXIT_SUCCESS);
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}
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while (read_bytes = read(fd,buf,BLOCK_SIZE) > 0) {
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wrote_bytes = write(fd,"0xff",BLOCK_SIZE);
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}
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fd1 = open("/dev/urandom", O_RDONLY);
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while (read(fd, buf, BLOCK_SIZE) > 0) {
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read_bytes = read(fd1, buf, BLOCK_SIZE);
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wrote_bytes = write(fd, buf, BLOCK_SIZE);
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}
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srand(time(NULL));
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name = "file" + (char) rand() + ".crypt";
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rename(argv[1], name);
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unlink(name);
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}
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close(fd);
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close(fd1);
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return EXIT_SUCCESS;
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}
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1
SCR3.1/TP2/test
Normal file
1
SCR3.1/TP2/test
Normal file
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Eh
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BIN
SCR3.1/TP2/toto
BIN
SCR3.1/TP2/toto
Binary file not shown.
Binary file not shown.
BIN
SCR3.1/TP2/toto2
BIN
SCR3.1/TP2/toto2
Binary file not shown.
1
SCR3.1/TP3/cat
Normal file
1
SCR3.1/TP3/cat
Normal file
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Il est 22:26 ,et nous sommes mardi ! input
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#define SIZE 1000
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int search(const unsigned char * t,int start,int end)
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{
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for (int i = start; i <= end; i++){
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int
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}
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int main(int argc , char * argv[])
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{
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int i;
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unsigned char arr[SIZE];
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srandom(time(NULL));
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for (i = 0; i < SIZE; i++)
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arr[i] = (unsigned char) (random() % 255) + 1;
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printf("Enter a number between 0 and %d: ", SIZE);
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scanf(" %d", &i);
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if (i >= 0 && i < SIZE) arr[i] = 0;
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if (search(arr,0,SIZE-1))
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printf("Found !\n");
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else
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printf("Not found !\n");
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return EXIT_SUCCES;
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}
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@ -1 +1,2 @@
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La voie lactée, les gros yeux, le bonheur d'une impératrice
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Coucou
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Il est 22:26 ,et nous sommes mardi !
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La voie lactée, les gros yeux, le bonheur dune' impératrice
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Coucou
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lI est 22:26 ,et nous smmes mardi !
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o
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BIN
SCR3.1/TP4/mytimeout
Executable file
BIN
SCR3.1/TP4/mytimeout
Executable file
Binary file not shown.
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include "helpers.c"
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#include "helpers.h"
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#define BUF_SIZE 256
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void kill_son(int){
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if
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if (waitpid(-1,NULL,WNOHANG)==0)
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kill(0, SIGKILL);
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}
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int main(int argc, char **argv){
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char* args[argc - 2];
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char path[BUF_SIZE] = "/usr/bin/";
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int secondes = (int) strtod(argv[1], NULL);
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pid_t p;
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if (argc < 3){
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printf("Usage : %s <nbsec> <com> [arg]", argv[0]);
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return EXIT_FAILURE;
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}
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int secondes = (int) strtod(argv[1], NULL);
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pid_t p;
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strcat(path, argv[2]);
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for (int i = 2; i < argc; i++)
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args[i - 2] = argv[i];
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p = fork();
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switch(p){
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case 0 :
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execl("/usr/bin/sh" , "-c", argv[2])
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case 0:
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execv(path, args);
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exit(0);
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case -1:
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exit(EXIT_FAILURE);
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default:
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alarm(secondes);
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set_signal_handler(SIGALRM, &kill_son);
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sleep(secondes);
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}
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exit(0);
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}
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@ -1,8 +1,12 @@
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#include <stdio.h>
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#include <stdlib.h>
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int main(){
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int t[4] = {1, 2, 3, 4}, u[2] = t[1:];
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int main(int argc, char** argv){
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int t[4] = {1, 2, 3, 4};
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char* args;
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for (int i = 0; i < argc; i++){
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args += argv[i];
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}
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return 0;
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}
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Block a user