所以我想测试给定的文件是否正常。
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
int main(int argc, char **argv)
{
// Input check.
if (argc != 2) {
fprintf(stdout,"Format: %s <filename.txt>\n", argv[0]);
return -1;
}
// Make sure the file is a regular file.
int fd;
if ((fd = open(argv[1], O_RDONLY) == -1)) {
fprintf(stdout, "%s", strerror(errno));
return -1;
}
struct stat st;
if ((fstat(fd, &st) == -1)) {
fprintf(stdout, "%s\n", strerror(errno));
return -1;
}
if (!(S_ISREG(st.st_mode))) {
fprintf(stdout, "Error, invalid …
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