URL: https://linuxfr.org/forums/programmation-c--2/posts/lockf-et-pb-dinclude
Title: lockf et pb d'include
Authors: Cereal Killer
Date: 2006年01月06日T23:31:39+01:00
Tags: debian
Score: 0
Bonsoir les moules!
Un petit problème en c m'amène a vous.
Le but du jeu est d'utiliser lockf et comme un bon bout de code vaut mieux qu'un long discours, voilà mon code :
 
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/file.h>
 #include <unistd.h>
 
 int main(int argc, char **argv)
 {
 £spaces£ £/spaces£int fd;
 £spaces£ £/spaces£off_t offst;
 £spaces£ £/spaces£char *buff;
 
 £spaces£ £/spaces£if( (fd = open("./fic", O_RDONLY)) != -1 )
 £spaces£ £/spaces£{
 £spaces£ £/spaces£printf("ouvert\n");
 £spaces£ £/spaces£offst = lseek(fd, 12, SEEK_SET);
 £spaces£ £/spaces£if( ( lockf(fd, F_TLOCK, offst) ) != -1)
 £spaces£ £/spaces£{
 £spaces£ £/spaces£buff = (char *)malloc(sizeof(char)*2);
 £spaces£ £/spaces£read(fd, buff, sizeof(char));
 £spaces£ £/spaces£write(1, buff, sizeof(char));
 £spaces£ £/spaces£printf("\n");
 £spaces£ £/spaces£free(buff);
 £spaces£ £/spaces£}else{
 £spaces£ £/spaces£perror("lockage");
 £spaces£ £/spaces£}
 £spaces£ £/spaces£}else{
 £spaces£ £/spaces£perror("ouverture");
 £spaces£ £/spaces£}
 
 £spaces£ £/spaces£if( (close(fd)) != -1 )
 £spaces£ £/spaces£{
 £spaces£ £/spaces£printf("ferme\n");
 £spaces£ £/spaces£}else{
 £spaces£ £/spaces£perror("fermeture");
 £spaces£ £/spaces£}
 
 £spaces£ £/spaces£return 0;
 }
et voilà c'que ça me sort quand je compile :
 
 gcc -Wall -ansi main.c -o verrou
 main.c: In function 'main':
 main.c:19: warning: implicit declaration of function 'lockf'
 main.c:19: error: 'F_TLOCK' undeclared (first use in this function)
 main.c:19: error: (Each undeclared identifier is reported only once
 main.c:19: error: for each function it appears in.)
 make: *** [all] Erreur 1
Alors que man lockf m'indique qu'il ne faut include que unistd.h !?
J'ai essayer ça sur 2 debian différentes et j'ai le même resultat.
Quelqu'un à une idée ?
Merci d'avance.
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