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#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdio.h>
struct {
const char *name;
int flag;
} table[] = {
{"path", O_PATH},
{"cx", O_CLOEXEC},
{"tmpf", O_TMPFILE},
{"rdwr", O_RDWR},
};
#define TABLELEN sizeof(table) / sizeof(table[0])
static int encode(const char *const s) {
for (int i = 0; i < TABLELEN; i++)
if (!strcmp(s, table[i].name))
return table[i].flag;
return 0;
}
static void print_usage(FILE *fp, const char *const prog) {
fprintf(fp, "Usage:\n");
fprintf(fp, " %s FILENAME FLAG ...\n", prog);
fprintf(fp, "Flags:\n");
for (int i = 0; i < TABLELEN; i++)
fprintf(fp, " %s\n", table[i].name);
}
int main(int argc, char **argv) {
if (argc < 3) {
fprintf(stderr, "Too few argument\n");
print_usage(stderr, argv[0]);
return 1;
}
char *fname = argv[1];
int flags = 0;
for (int i = 2; i < argc; i++)
flags |= encode(argv[i]);
int fd = open(fname, flags, 0644);
if (fd < 0) {
perror("open");
return 1;
}
printf("%d\n", getpid());
fflush(stdout);
pause();
return 0;
}
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