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