43 lines
669 B
C
43 lines
669 B
C
#include <sys/types.h>
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#include <unistd.h>
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#include<stdio.h>
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#include <stdlib.h>
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#include<assert.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#define msg1 "je suis le pere"
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#define msg2 "je suis le fils !!!"
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int main(int argc,char * argv[]){
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int outfd;
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pid_t p;
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if (argc != 2){
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printf("%s file\n",argv[0]);
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exit(1);
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}
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p=fork();
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outfd = open(argv[1],O_WRONLY|O_CREAT,0644);
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assert(outfd >= 0);
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//p=fork();
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switch(p){
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case (pid_t)-1 :
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perror(NULL);
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exit(2);
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case (pid_t)0 :
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write(outfd,msg2,strlen(msg2));
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break;
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default :
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write (outfd,msg1,strlen(msg1));
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break;
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}
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close(outfd);
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}
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