50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/* This file is part of the sample code and exercises
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* used by the class "Advanced Programming in the UNIX
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* Environment" taught by Jan Schaumann
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* <jschauma@netmeister.org> at Stevens Institute of
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* Technology.
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*
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* This file is in the public domain.
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*
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* You don't have to, but if you feel like
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* acknowledging where you got this code, you may
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* reference me by name, email address, or point
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* people to the course website:
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* https://stevens.netmeister.org/631/
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*/
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/* This program illustrates the uselessness of an external cd(1) command,
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* as required by POSIX.1; note that many Unix versions don't bother
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* implementing /usr/bin/cd anymore, but FreeBSD and Mac OS X, for
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* example, still provide it via a generic shell builtin wrapper:
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* http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/usr.bin/alias/generic.sh?rev=HEAD;content-type=text%2Fplain
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*/
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#include <sys/param.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.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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int
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main(int argc, char **argv) {
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char buf[MAXPATHLEN];
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if (argc != 2) {
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fprintf(stderr, "%s: need a directory!\n", argv[0]);
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return(EXIT_FAILURE);
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}
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if (chdir(argv[1]) == -1) {
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fprintf(stderr, "%s: unable to chdir to %s: %s\n", argv[0],
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argv[1], strerror(errno));
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return(EXIT_FAILURE);
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}
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printf("Ok, cwd is now: %s\n", getcwd(buf, MAXPATHLEN));
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exit(EXIT_SUCCESS);
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}
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