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bootchartd: mounting tmpfs is Linux-specific

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Signed-off-by: Jeremie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Jeremie Koenig 2010-07-29 04:29:53 +02:00 committed by Denys Vlasenko
parent 5a71fb8202
commit e7a0632b7b
1 changed files with 13 additions and 7 deletions
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20
init/bootchartd.c
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@ -6,7 +6,6 @@
//config:config BOOTCHARTD
//config: bool "bootchartd"
//config: default y
//config: depends on PLATFORM_LINUX
//config: help
//config: bootchartd is commonly used to profile the boot process
//config: for the purpose of speeding it up. In this case, it is started
@ -46,12 +45,15 @@
#include "libbb.h"
/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h>
#include <sys/mount.h>
#ifndef MS_SILENT
# define MS_SILENT (1 << 15)
#endif
#ifndef MNT_DETACH
# define MNT_DETACH 0x00000002
#ifdef __linux__
# include <sys/mount.h>
# ifndef MS_SILENT
# define MS_SILENT (1 << 15)
# endif
# ifndef MNT_DETACH
# define MNT_DETACH 0x00000002
# endif
#endif
#define BC_VERSION_STR "0.8"
@ -175,6 +177,7 @@ static char *make_tempdir(void)
char template[] = "/tmp/bootchart.XXXXXX";
char *tempdir = xstrdup(mkdtemp(template));
if (!tempdir) {
#ifdef __linux__
/* /tmp is not writable (happens when we are used as init).
* Try to mount a tmpfs, them cd and lazily unmount it.
* Since we unmount it at once, we can mount it anywhere.
@ -192,6 +195,9 @@ static char *make_tempdir(void)
if (umount2(try_dir, MNT_DETACH) != 0) {
bb_perror_msg_and_die("can't %smount tmpfs", "un");
}
#else
bb_perror_msg_and_die("can't create temporary directory");
#endif
} else {
xchdir(tempdir);
}