Annotation of src/bin/pwd/pwd.c, Revision 1.18
1.18 ! jschauma 1: /* $NetBSD: pwd.c,v 1.17 2003/08/13 03:27:21 itojun Exp $ */
1.7 cgd 2:
1.1 cgd 3: /*
1.6 mycroft 4: * Copyright (c) 1991, 1993, 1994
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.16 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
1.8 christos 32: #include <sys/cdefs.h>
1.1 cgd 33: #ifndef lint
1.8 christos 34: __COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\n\
35: The Regents of the University of California. All rights reserved.\n");
1.1 cgd 36: #endif /* not lint */
37:
38: #ifndef lint
1.7 cgd 39: #if 0
40: static char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94";
41: #else
1.18 ! jschauma 42: __RCSID("$NetBSD: pwd.c,v 1.17 2003/08/13 03:27:21 itojun Exp $");
1.7 cgd 43: #endif
1.1 cgd 44: #endif /* not lint */
45:
1.15 jschauma 46: #include <sys/param.h>
47: #include <sys/stat.h>
1.12 kleink 48: #include <sys/types.h>
1.14 wiz 49:
1.6 mycroft 50: #include <err.h>
1.12 kleink 51: #include <errno.h>
1.5 jtc 52: #include <stdio.h>
53: #include <stdlib.h>
1.12 kleink 54: #include <string.h>
1.1 cgd 55: #include <unistd.h>
1.15 jschauma 56: #include <vis.h>
57:
58: int stdout_ok; /* stdout connected to a terminal */
1.11 wsanchez 59:
1.14 wiz 60: static char *getcwd_logical(char *, size_t);
61: static void usage(void);
62: int main(int, char *[]);
1.1 cgd 63:
1.5 jtc 64: int
1.14 wiz 65: main(int argc, char *argv[])
1.1 cgd 66: {
1.14 wiz 67: int ch, lFlag;
1.12 kleink 68: const char *p;
1.1 cgd 69:
1.14 wiz 70: setprogname(argv[0]);
71: lFlag = 0;
1.11 wsanchez 72: while ((ch = getopt(argc, argv, "LP")) != -1)
1.6 mycroft 73: switch (ch) {
1.11 wsanchez 74: case 'L':
1.14 wiz 75: lFlag = 1;
1.11 wsanchez 76: break;
1.6 mycroft 77: case 'P':
1.14 wiz 78: lFlag = 0;
1.6 mycroft 79: break;
80: case '?':
81: default:
82: usage();
83: }
84: argc -= optind;
85: argv += optind;
86:
87: if (argc != 0)
88: usage();
1.5 jtc 89:
1.11 wsanchez 90: if (lFlag)
91: p = getcwd_logical(NULL, 0);
92: else
93: p = getcwd(NULL, 0);
94:
1.12 kleink 95: if (p == NULL)
1.13 drochner 96: err(EXIT_FAILURE, NULL);
1.11 wsanchez 97:
1.15 jschauma 98: stdout_ok = isatty(STDOUT_FILENO);
99:
1.18 ! jschauma 100: (void)printf("%s\n", p);
1.11 wsanchez 101:
1.12 kleink 102: exit(EXIT_SUCCESS);
1.10 mycroft 103: /* NOTREACHED */
1.11 wsanchez 104: }
105:
1.12 kleink 106: static char *
1.14 wiz 107: getcwd_logical(char *pt, size_t size)
1.11 wsanchez 108: {
1.12 kleink 109: char *pwd;
110: size_t pwdlen;
111: dev_t dev;
112: ino_t ino;
113: struct stat s;
114:
115: /* Check $PWD -- if it's right, it's fast. */
116: if ((pwd = getenv("PWD")) != NULL && pwd[0] == '/') {
117: if (stat(pwd, &s) != -1) {
118: dev = s.st_dev;
119: ino = s.st_ino;
120: if (stat(".", &s) != -1 && dev == s.st_dev &&
121: ino == s.st_ino) {
122: pwdlen = strlen(pwd);
123: if (pt) {
124: if (!size) {
125: errno = EINVAL;
126: return (NULL);
127: }
128: if (pwdlen + 1 > size) {
129: errno = ERANGE;
130: return (NULL);
131: }
132: } else if ((pt = malloc(pwdlen + 1)) == NULL)
133: return (NULL);
134: (void)memmove(pt, pwd, pwdlen);
135: pt[pwdlen] = '\0';
136: return (pt);
137: }
138: }
139: } else
140: errno = ENOENT;
1.11 wsanchez 141:
1.12 kleink 142: return (NULL);
1.6 mycroft 143: }
144:
1.12 kleink 145: static void
1.14 wiz 146: usage(void)
1.6 mycroft 147: {
1.14 wiz 148: (void)fprintf(stderr, "usage: %s [-LP]\n", getprogname());
1.12 kleink 149: exit(EXIT_FAILURE);
1.10 mycroft 150: /* NOTREACHED */
1.1 cgd 151: }
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