X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=mem%2Fmem.c;fp=mem%2Fmem.c;h=95e43f90b58654b4b75bd5217b3b9dc067fb36fe;hb=1652ed72479279c701c0779fc01aceed40ca4101;hp=0000000000000000000000000000000000000000;hpb=c3a3595decdb2968e7d8ca7178581503b1b6e7b5;p=TD_SE.git

diff --git a/mem/mem.c b/mem/mem.c
new file mode 100644
index 0000000..95e43f9
--- /dev/null
+++ b/mem/mem.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#define nbchar 4096
+
+int main()
+{
+	int fd, res;
+	char *partage = NULL;
+	char *message = "";
+	fd = shm_open("partage.mem", O_RDWR | O_CREAT, 0600);	/* ouverture du segment partagé */
+	if (fd == -1) {		                                    /* et création du nom (du fichier) */
+		perror("shm_open");
+		exit(1);
+	}
+	res = ftruncate(fd, nbchar);	/* choix de la taille du segment */
+	if (res == -1) {
+		perror("ftruncate");
+		exit(1);
+	}
+	partage = (char *)mmap(NULL, nbchar, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (partage == MAP_FAILED) {
+		perror("mmap");
+		exit(1);
+	}
+	strncpy(partage, message, nbchar);
+	while (strcmp(partage, message) == 0) {
+		sleep(1);
+	}
+	fprintf(stdout, "la réponse est %s\n", partage);
+	res = munmap(partage, nbchar);
+	if (res == -1) {
+		perror("munmap");
+		exit(1);
+	}
+	close(fd);		/* fermeture du fichier */
+	res = shm_unlink("partage.mem");	/* suppression du nom */
+	if (res == -1) {
+		perror("shm_unlink");
+		exit(1);
+	}
+	return 0;
+}