100 lines
1.8 KiB
C
100 lines
1.8 KiB
C
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/stat.h>
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void error(char *msg)
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{
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write(2, msg, strlen(msg));
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}
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int main(void)
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{
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int fd_in = STDIN_FILENO;
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int fd_out = STDOUT_FILENO;
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struct stat statbuf_in;
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struct stat statbuf_out;
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char c;
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if (fstat(fd_in, &statbuf_in) == -1)
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{
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perror("fstat");
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return (1);
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}
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error("STDIN File type: ");
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switch (statbuf_in.st_mode & S_IFMT)
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{
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case S_IFBLK:
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error("block device\n");
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break;
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case S_IFCHR:
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error("character device\n");
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break;
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case S_IFDIR:
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error("directory\n");
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break;
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case S_IFIFO:
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error("FIFO/pipe\n");
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break;
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case S_IFLNK:
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error("symlink\n");
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break;
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case S_IFREG:
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error("regular file\n");
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break;
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case S_IFSOCK:
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error("socket\n");
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break;
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default:
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error("unknown?\n");
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break;
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}
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error("\n");
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if (fstat(fd_out, &statbuf_out) == -1)
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{
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perror("fstat");
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return (1);
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}
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error("STDOUT File type: ");
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switch (statbuf_out.st_mode & S_IFMT)
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{
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case S_IFBLK:
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error("block device\n");
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break;
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case S_IFCHR:
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error("character device\n");
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break;
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case S_IFDIR:
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error("directory\n");
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break;
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case S_IFIFO:
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error("FIFO/pipe\n");
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break;
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case S_IFLNK:
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error("symlink\n");
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break;
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case S_IFREG:
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error("regular file\n");
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break;
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case S_IFSOCK:
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error("socket\n");
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break;
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default:
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error("unknown?\n");
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break;
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}
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while (read(fd_in, &c, 1) > 0)
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{
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write(fd_out, &c, 1);
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}
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return (0);
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}
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