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created pipetester program

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whaffman 2025-02-12 14:25:54 +01:00
parent a1b064fdfc
commit 662343a6ef
1 changed files with 61 additions and 0 deletions
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pipetester.c Normal file
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#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
void error(char *msg)
{
write(2, msg, strlen(msg));
}
int main(void)
{
int fd_in = STDIN_FILENO;
int fd_out = STDOUT_FILENO;
struct stat statbuf_in;
struct stat statbuf_out;
if (fstat(fd_in, &statbuf_in) == -1)
{
perror("fstat");
return (1);
}
error("STDIN File type: ");
switch (statbuf_in.st_mode & S_IFMT) {
case S_IFBLK: error("block device\n"); break;
case S_IFCHR: error("character device\n"); break;
case S_IFDIR: error("directory\n"); break;
case S_IFIFO: error("FIFO/pipe\n"); break;
case S_IFLNK: error("symlink\n"); break;
case S_IFREG: error("regular file\n"); break;
case S_IFSOCK: error("socket\n"); break;
default: error("unknown?\n"); break;
}
error("\n");
if (fstat(fd_out, &statbuf_out) == -1)
{
perror("fstat");
return (1);
}
error("STDOUT File type: ");
switch (statbuf_out.st_mode & S_IFMT) {
case S_IFBLK: error("block device\n"); break;
case S_IFCHR: error("character device\n"); break;
case S_IFDIR: error("directory\n"); break;
case S_IFIFO: error("FIFO/pipe\n"); break;
case S_IFLNK: error("symlink\n"); break;
case S_IFREG: error("regular file\n"); break;
case S_IFSOCK: error("socket\n"); break;
default: error("unknown?\n"); break;
}
return (0);
}