| 1 | |
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| 2 | /* |
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| 3 | * pwd.c -- return the current working directory |
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| 4 | * |
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| 5 | * $Id: pwd.c,v 1.1.1.1 1999-02-07 18:14:09 danw Exp $ |
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| 6 | */ |
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| 7 | |
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| 8 | #include <h/mh.h> |
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| 9 | |
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| 10 | static char curwd[PATH_MAX]; |
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| 11 | |
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| 12 | |
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| 13 | char * |
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| 14 | pwd(void) |
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| 15 | { |
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| 16 | register char *cp; |
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| 17 | |
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| 18 | if (!getcwd (curwd, PATH_MAX)) { |
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| 19 | admonish (NULL, "unable to determine working directory"); |
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| 20 | if (!mypath || !*mypath |
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| 21 | || (strcpy (curwd, mypath), chdir (curwd)) == -1) { |
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| 22 | strcpy (curwd, "/"); |
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| 23 | chdir (curwd); |
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| 24 | } |
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| 25 | return curwd; |
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| 26 | } |
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| 27 | |
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| 28 | if ((cp = curwd + strlen (curwd) - 1) > curwd && *cp == '/') |
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| 29 | *cp = '\0'; |
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| 30 | |
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| 31 | return curwd; |
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| 32 | } |
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| 33 | |
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| 34 | |
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| 35 | #if 0 |
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| 36 | |
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| 37 | /* |
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| 38 | * Currently commented out. Everyone seems |
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| 39 | * to have a native version these days. |
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| 40 | */ |
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| 41 | |
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| 42 | /* |
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| 43 | * getwd() - get the current working directory |
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| 44 | */ |
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| 45 | |
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| 46 | int |
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| 47 | getwd(char *cwd) |
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| 48 | { |
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| 49 | int found; |
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| 50 | char tmp1[BUFSIZ], tmp2[BUFSIZ]; |
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| 51 | struct stat st1, st2, root; |
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| 52 | register struct direct *dp; |
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| 53 | register DIR *dd; |
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| 54 | |
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| 55 | strcpy (cwd, "/"); |
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| 56 | stat ("/", &root); |
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| 57 | |
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| 58 | for (;;) { |
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| 59 | if ((dd = opendir ("..")) == NULL) |
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| 60 | return -1; |
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| 61 | if (stat (".", &st2) == -1 || stat ("..", &st1) == -1) |
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| 62 | goto out; |
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| 63 | if (st2.st_ino == root.st_ino && st2.st_dev == root.st_dev) { |
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| 64 | closedir (dd); |
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| 65 | return chdir (cwd); |
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| 66 | } |
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| 67 | |
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| 68 | if (st2.st_ino == st1.st_ino && st2.st_dev == st1.st_dev) { |
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| 69 | closedir (dd); |
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| 70 | chdir ("/"); |
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| 71 | if ((dd = opendir (".")) == NULL) |
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| 72 | return -1; |
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| 73 | if (stat (".", &st1) < 0) |
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| 74 | goto out; |
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| 75 | if (st2.st_dev != st1.st_dev) |
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| 76 | while (dp = readdir (dd)) { |
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| 77 | if (stat (dp->d_name, &st1) == -1) |
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| 78 | goto out; |
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| 79 | if (st2.st_dev == st1.st_dev) { |
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| 80 | snprintf (tmp1, sizeof(tmp1), "%s%s", dp->d_name, cwd); |
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| 81 | strcpy (cwd + 1, tmp1); |
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| 82 | closedir (dd); |
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| 83 | return (chdir (cwd)); |
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| 84 | } |
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| 85 | } |
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| 86 | else { |
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| 87 | closedir (dd); |
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| 88 | return (chdir (cwd)); |
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| 89 | } |
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| 90 | } |
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| 91 | |
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| 92 | found = 0; |
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| 93 | while (dp = readdir (dd)) { |
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| 94 | snprintf (tmp2, sizeof(tmp2), "../%s", dp->d_name); |
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| 95 | if (stat (tmp2, &st1) != -1 |
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| 96 | && st1.st_ino == st2.st_ino |
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| 97 | && st1.st_dev == st2.st_dev) { |
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| 98 | closedir (dd); |
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| 99 | found++; |
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| 100 | chdir (".."); |
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| 101 | snprintf (tmp1, sizeof(tmp1), "%s%s", dp->d_name, cwd); |
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| 102 | strcpy (cwd + 1, tmp1); |
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| 103 | break; |
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| 104 | } |
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| 105 | } |
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| 106 | if (!found) |
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| 107 | goto out; |
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| 108 | } |
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| 109 | |
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| 110 | out: ; |
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| 111 | closedir (dd); |
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| 112 | return -1; |
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| 113 | } |
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| 114 | |
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| 115 | #endif |
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