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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/xattr.h>
static char MY_XATTR[] = "user.fxtest";
static char *PROGRAM;
#define CONSUME(v) \
do { \
if (!argc) { \
fprintf(stderr, "missing argument\n"); \
return EXIT_FAILURE; \
} \
v = argv[0]; \
++argv; \
--argc; \
} while (0)
static int
do_get(int argc, char **argv, int fd)
{
char *value;
int ret;
char buf[1024];
CONSUME(value);
ret = fgetxattr(fd, MY_XATTR, buf, sizeof(buf));
if (ret == (-1)) {
perror("fgetxattr");
return EXIT_FAILURE;
}
if (strncmp(buf, value, ret) != 0) {
fprintf(stderr, "data mismatch\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int
do_set(int argc, char **argv, int fd)
{
char *value;
int ret;
CONSUME(value);
ret = fsetxattr(fd, MY_XATTR, value, strlen(value), 0);
if (ret == (-1)) {
perror("fsetxattr");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int
do_remove(int argc, char **argv, int fd)
{
int ret;
ret = fremovexattr(fd, MY_XATTR);
if (ret == (-1)) {
perror("femovexattr");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int
main(int argc, char **argv)
{
int fd;
char *path;
char *cmd;
CONSUME(PROGRAM);
CONSUME(path);
CONSUME(cmd);
fd = open(path, O_RDWR);
if (fd == (-1)) {
perror("open");
return EXIT_FAILURE;
}
if (strcmp(cmd, "get") == 0) {
return do_get(argc, argv, fd);
}
if (strcmp(cmd, "set") == 0) {
return do_set(argc, argv, fd);
}
if (strcmp(cmd, "remove") == 0) {
return do_remove(argc, argv, fd);
}
return EXIT_SUCCESS;
}
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