StudyingUnixInterface/4/fileDirectory/symlinks.c

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2020-12-07 04:17:01 +00:00
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
int main(void) {
int fd = open("/home/eric", O_RDONLY);
if(fd == -1) {
printf("open error for directory .\n");
return -1;
}
if(symlinkat("symlinks.c", fd, "test/symlinksl.c") < 0) {
printf("symlink error\n");
return -1;
}
close(fd);
char buf[1024];
ssize_t rbit = readlink("/home/eric/test/symlinksl.c", buf, 1024);
if(rbit < 0) {
printf("readlink error\n");
return -1;
}
buf[rbit] = 0;
printf("rbit: %d buf: %s\n", rbit, buf);
return 0;
}