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Hurd compat fixes. Mostly dealing with absent PATH_MAX

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Signed-off-by: Jérémie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Jérémie Koenig
2010-03-26 19:08:53 +01:00
committed by Denys Vlasenko
parent 35fdb1bc9c
commit fbedacfc8c
13 changed files with 85 additions and 61 deletions
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33
util-linux/umount.c
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@ -39,6 +39,10 @@
# define MS_RELATIME (1 << 21)
#endif
#include "libbb.h"
#ifndef PATH_MAX
# define PATH_MAX (4*1024)
#endif
#if defined(__dietlibc__)
/* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
@ -69,7 +73,7 @@ int umount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int umount_main(int argc UNUSED_PARAM, char **argv)
{
int doForce;
char *const path = xmalloc(PATH_MAX + 2); /* to save stack */
char *const buf = xmalloc(PATH_MAX * 2 + 128); /* to save stack */
struct mntent me;
FILE *fp;
char *fstype = NULL;
@ -100,7 +104,7 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
if (opt & OPT_ALL)
bb_error_msg_and_die("can't open '%s'", bb_path_mtab_file);
} else {
while (getmntent_r(fp, &me, path, PATH_MAX)) {
while (getmntent_r(fp, &me, buf, PATH_MAX * 2 + 128)) {
/* Match fstype if passed */
if (!match_fstype(&me, fstype))
continue;
@ -124,10 +128,11 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
for (;;) {
int curstat;
char *zapit = *argv;
char *path;
// Do we already know what to umount this time through the loop?
if (m)
safe_strncpy(path, m->dir, PATH_MAX);
path = xstrdup(m->dir);
// For umount -a, end of mtab means time to exit.
else if (opt & OPT_ALL)
break;
@ -136,10 +141,12 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
if (!zapit)
break;
argv++;
realpath(zapit, path);
for (m = mtl; m; m = m->next)
if (!strcmp(path, m->dir) || !strcmp(path, m->device))
break;
path = xmalloc_realpath(zapit);
if (path) {
for (m = mtl; m; m = m->next)
if (strcmp(path, m->dir) == 0 || strcmp(path, m->device) == 0)
break;
}
}
// If we couldn't find this sucker in /etc/mtab, punt by passing our
// command line argument straight to the umount syscall. Otherwise,
@ -181,9 +188,13 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
// Find next matching mtab entry for -a or umount /dev
// Note this means that "umount /dev/blah" will unmount all instances
// of /dev/blah, not just the most recent.
if (m) while ((m = m->next) != NULL)
if ((opt & OPT_ALL) || !strcmp(path, m->device))
break;
if (m) {
while ((m = m->next) != NULL)
// NB: if m is non-NULL, path is non-NULL as well
if ((opt & OPT_ALL) || strcmp(path, m->device) == 0)
break;
}
free(path);
}
// Free mtab list if necessary
@ -195,7 +206,7 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
free(mtl);
mtl = m;
}
free(path);
free(buf);
}
return status;