50 lines
1.1 KiB
C
Executable File
50 lines
1.1 KiB
C
Executable File
/* pwd - print working directory Author: Norbert Schlenker */
|
|
|
|
/*
|
|
* pwd - print working directory
|
|
* Syntax: pwd
|
|
* Flags: None.
|
|
* Author: Norbert Schlenker
|
|
* Copyright: None. Released to the public domain.
|
|
* Reference: IEEE P1003.2 Section 4.50 (draft 10)
|
|
* Bugs: No internationalization support; all messages are in English.
|
|
*/
|
|
|
|
/* Force visible Posix names */
|
|
#ifndef _POSIX_SOURCE
|
|
#define _POSIX_SOURCE 1
|
|
#endif
|
|
|
|
/* External interfaces */
|
|
#include <sys/types.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
|
|
/* Magic numbers suggested or required by Posix specification */
|
|
#define SUCCESS 0 /* exit code in case of success */
|
|
#define FAILURE 1 /* or failure */
|
|
|
|
_PROTOTYPE(int main, (void));
|
|
|
|
static char dir[PATH_MAX + 1];
|
|
static char *errmsg = "pwd: cannot search some directory on the path\n";
|
|
|
|
int main()
|
|
{
|
|
char *p;
|
|
size_t n;
|
|
|
|
p = getcwd(dir, PATH_MAX);
|
|
if (p == NULL) {
|
|
write(STDERR_FILENO, errmsg, strlen(errmsg));
|
|
exit(FAILURE);
|
|
}
|
|
n = strlen(p);
|
|
p[n] = '\n';
|
|
if (write(STDOUT_FILENO, p, n + 1) != n + 1) exit(FAILURE);
|
|
return(SUCCESS);
|
|
}
|