2 * FreeBSD install - a package for the installation and maintainance
3 * of non-core utilities.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
17 * Routines for managing the "play pen".
21 #include <sys/cdefs.h>
22 __FBSDID("$FreeBSD$");
28 #include <sys/signal.h>
29 #include <sys/param.h>
30 #include <sys/mount.h>
32 /* For keeping track of where we are */
33 static char PenLocation[FILENAME_MAX];
41 /* Find a good place to play. */
43 find_play_pen(char *pen, off_t sz)
49 if (pen[0] && isdir(dirname(pen)) == TRUE && (min_free(dirname(pen)) >= sz))
51 else if ((cp = getenv("PKG_TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
52 sprintf(pen, "%s/instmp.XXXXXX", cp);
53 else if ((cp = getenv("TMPDIR")) != NULL && stat(cp, &sb) != FAIL && (min_free(cp) >= sz))
54 sprintf(pen, "%s/instmp.XXXXXX", cp);
55 else if (stat("/var/tmp", &sb) != FAIL && min_free("/var/tmp") >= sz)
56 strcpy(pen, "/var/tmp/instmp.XXXXXX");
57 else if (stat("/tmp", &sb) != FAIL && min_free("/tmp") >= sz)
58 strcpy(pen, "/tmp/instmp.XXXXXX");
59 else if ((stat("/usr/tmp", &sb) == SUCCESS || mkdir("/usr/tmp", 01777) == SUCCESS) && min_free("/usr/tmp") >= sz)
60 strcpy(pen, "/usr/tmp/instmp.XXXXXX");
63 humanize_number(humbuf, sizeof humbuf, sz, "", HN_AUTOSCALE,
66 "%s: can't find enough temporary space to extract the files, please set your\n"
67 "PKG_TMPDIR environment variable to a location with at least %s bytes\n"
68 "free", __func__, humbuf);
75 static char *pstack[MAX_STACK];
76 static int pdepth = -1;
79 pushPen(const char *pen)
81 if (++pdepth == MAX_STACK)
82 errx(2, "%s: stack overflow.\n", __func__);
83 pstack[pdepth] = strdup(pen);
85 return pstack[pdepth];
95 strcpy(pen, pstack[pdepth]);
96 free(pstack[pdepth--]);
100 * Make a temporary directory to play in and chdir() to it, returning
101 * pathname of previous working directory.
104 make_playpen(char *pen, off_t sz)
106 char humbuf1[6], humbuf2[6];
107 char cwd[FILENAME_MAX];
109 if (!find_play_pen(pen, sz))
114 errx(2, "%s: can't mktemp '%s'", __func__, pen);
119 humanize_number(humbuf1, sizeof humbuf1, sz, "", HN_AUTOSCALE,
121 humanize_number(humbuf2, sizeof humbuf2, min_free(pen),
122 "", HN_AUTOSCALE, HN_NOSPACE);
123 fprintf(stderr, "Requested space: %s bytes, free space: %s bytes in %s\n", humbuf1, humbuf2, pen);
127 if (min_free(pen) < sz) {
130 errx(2, "%s: not enough free space to create '%s'.\n"
131 "Please set your PKG_TMPDIR environment variable to a location\n"
132 "with more space and\ntry the command again", __func__, pen);
135 if (!getcwd(cwd, FILENAME_MAX)) {
140 if (chdir(pen) == FAIL) {
142 errx(2, "%s: can't chdir to '%s'", __func__, pen);
145 strcpy(PenLocation, pen);
149 /* Convenience routine for getting out of playpen */
153 static char left[FILENAME_MAX];
159 /* Don't interrupt while we're cleaning up */
160 oldsig = signal(SIGINT, SIG_IGN);
161 strcpy(left, PenLocation);
164 if (chdir(PenLocation) == FAIL) {
166 errx(2, "%s: can't chdir back to '%s'", __func__, PenLocation);
169 if (left[0] == '/' && vsystem("/bin/rm -rf %s", left))
170 warnx("couldn't remove temporary dir '%s'", left);
171 signal(SIGINT, oldsig);
177 min_free(const char *tmpdir)
181 if (statfs(tmpdir, &buf) != 0) {
185 return (off_t)buf.f_bavail * (off_t)buf.f_bsize;