filetype.c

UNIX高级环境编程（第二版）文件系统部分的程序

#include    <sys/types.h>
#include    <sys/stat.h>
#include    "ourhdr.h"

int
main(int argc, char *argv[])
{
    int            i;
    struct stat    buf;
    char        *ptr;

    for (i = 1; i < argc; i++) {
        printf("%s: ", argv[i]);
        if (lstat(argv[i], &buf) < 0) {
            err_ret("lstat error");
            continue;
        }

        if      (S_ISREG(buf.st_mode))    ptr = "regular";
        else if (S_ISDIR(buf.st_mode))    ptr = "directory";
        else if (S_ISCHR(buf.st_mode))    ptr = "character special";
        else if (S_ISBLK(buf.st_mode))    ptr = "block special";
        else if (S_ISFIFO(buf.st_mode))    ptr = "fifo";
#ifdef    S_ISLNK
        else if (S_ISLNK(buf.st_mode))    ptr = "symbolic link";
#endif
#ifdef    S_ISSOCK
        else if (S_ISSOCK(buf.st_mode))    ptr = "socket";
#endif
        else                ptr = "** unknown mode **";
        printf("%s\n", ptr);
    }
    exit(0);
}