시스템소프트웨어실험
4장 예제
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Ex04-02
#include [unistd.h]
#include [sys/types.h]
#include [sys/stat.h]
int main()
{ int filedes;
mode_t oldmask;
oldmask = umask(023);
filedes = open( test.txt ,O_CREAT, 0777);
close(filedes);
}
Ex04-04
#include [stdio.h]
#include [stdlib.h]
#include [unistd.h]
int main()
{
char *filename = test04.txt ;
if ( access(filename, R_OK) == -1){
fprintf( stderr, User cannot read file %s
,
filename);
exit(1);
}
printf( %s readable, proceeding
, filename);
/* rest of program ...*/
}
Ex04-07
#include [unistd.h]
int main(int argc, char *argv[])
{
if(link(argv[1], argv[2]))
printf( hard-link failed
);
}
Ex04-08
#include [unistd.h]
main(int argc, char *argv[])
{
.... |
2011.04.29
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