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Date: Tue, 30 Oct 2007 13:28:49 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
WANG Cong <xiyou.wangcong@...il.com>
Subject: [PATCH 2/4] UML - Code tidying under arch/um/os-Linux
From: WANG Cong <xiyou.wangcong@...il.com>
This patch contains varied fixes and improvements for some files under
arch/um/os-Linux/, such as a typo fix in a perror message, a missing
argument fix for a printf, some constifying for pointers and so on.
[ jdike - made sigprocmask failure return -errno instead of -1 ]
Signed-off-by: WANG Cong <xiyou.wangcong@...il.com>
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
arch/um/include/os.h | 12 ++++++------
arch/um/os-Linux/file.c | 14 +++++++-------
arch/um/os-Linux/main.c | 12 ++++++++----
arch/um/os-Linux/mem.c | 5 ++++-
arch/um/os-Linux/signal.c | 3 ++-
arch/um/os-Linux/start_up.c | 2 +-
6 files changed, 28 insertions(+), 20 deletions(-)
Index: linux-2.6.22/arch/um/include/os.h
===================================================================
--- linux-2.6.22.orig/arch/um/include/os.h 2007-10-29 12:51:14.000000000 -0400
+++ linux-2.6.22/arch/um/include/os.h 2007-10-29 12:56:18.000000000 -0400
@@ -137,24 +137,24 @@ extern int os_set_owner(int fd, int pid)
extern int os_mode_fd(int fd, int mode);
extern int os_seek_file(int fd, unsigned long long offset);
-extern int os_open_file(char *file, struct openflags flags, int mode);
+extern int os_open_file(const char *file, struct openflags flags, int mode);
extern int os_read_file(int fd, void *buf, int len);
extern int os_write_file(int fd, const void *buf, int count);
-extern int os_file_size(char *file, unsigned long long *size_out);
-extern int os_file_modtime(char *file, unsigned long *modtime);
+extern int os_file_size(const char *file, unsigned long long *size_out);
+extern int os_file_modtime(const char *file, unsigned long *modtime);
extern int os_pipe(int *fd, int stream, int close_on_exec);
extern int os_set_fd_async(int fd, int owner);
extern int os_clear_fd_async(int fd);
extern int os_set_fd_block(int fd, int blocking);
extern int os_accept_connection(int fd);
-extern int os_create_unix_socket(char *file, int len, int close_on_exec);
+extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
extern int os_shutdown_socket(int fd, int r, int w);
extern void os_close_file(int fd);
extern int os_rcv_fd(int fd, int *helper_pid_out);
extern int create_unix_socket(char *file, int len, int close_on_exec);
-extern int os_connect_socket(char *name);
+extern int os_connect_socket(const char *name);
extern int os_file_type(char *file);
-extern int os_file_mode(char *file, struct openflags *mode_out);
+extern int os_file_mode(const char *file, struct openflags *mode_out);
extern int os_lock_file(int fd, int excl);
extern void os_flush_stdout(void);
extern int os_stat_filesystem(char *path, long *bsize_out,
Index: linux-2.6.22/arch/um/os-Linux/file.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/file.c 2007-10-29 12:51:14.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/file.c 2007-10-29 12:56:18.000000000 -0400
@@ -19,7 +19,7 @@
#include "user.h"
#include "kern_util.h"
-static void copy_stat(struct uml_stat *dst, struct stat64 *src)
+static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
{
*dst = ((struct uml_stat) {
.ust_dev = src->st_dev, /* device */
@@ -168,7 +168,7 @@ int os_file_type(char *file)
else return OS_TYPE_FILE;
}
-int os_file_mode(char *file, struct openflags *mode_out)
+int os_file_mode(const char *file, struct openflags *mode_out)
{
int err;
@@ -189,7 +189,7 @@ int os_file_mode(char *file, struct open
return err;
}
-int os_open_file(char *file, struct openflags flags, int mode)
+int os_open_file(const char *file, struct openflags flags, int mode)
{
int fd, err, f = 0;
@@ -216,7 +216,7 @@ int os_open_file(char *file, struct open
return fd;
}
-int os_connect_socket(char *name)
+int os_connect_socket(const char *name)
{
struct sockaddr_un sock;
int fd, err;
@@ -277,7 +277,7 @@ int os_write_file(int fd, const void *bu
return n;
}
-int os_file_size(char *file, unsigned long long *size_out)
+int os_file_size(const char *file, unsigned long long *size_out)
{
struct uml_stat buf;
int err;
@@ -314,7 +314,7 @@ int os_file_size(char *file, unsigned lo
return 0;
}
-int os_file_modtime(char *file, unsigned long *modtime)
+int os_file_modtime(const char *file, unsigned long *modtime)
{
struct uml_stat buf;
int err;
@@ -515,7 +515,7 @@ int os_rcv_fd(int fd, int *helper_pid_ou
return new;
}
-int os_create_unix_socket(char *file, int len, int close_on_exec)
+int os_create_unix_socket(const char *file, int len, int close_on_exec)
{
struct sockaddr_un addr;
int sock, err;
Index: linux-2.6.22/arch/um/os-Linux/main.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/main.c 2007-10-29 12:51:31.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/main.c 2007-10-29 12:56:18.000000000 -0400
@@ -73,7 +73,7 @@ static void install_fatal_handler(int si
action.sa_handler = last_ditch_exit;
if (sigaction(sig, &action, NULL) < 0) {
printf("failed to install handler for signal %d - errno = %d\n",
- errno);
+ sig, errno);
exit(1);
}
}
@@ -92,7 +92,8 @@ static void setup_env_path(void)
* just use the default + /usr/lib/uml
*/
if (!old_path || (path_len = strlen(old_path)) == 0) {
- putenv("PATH=:/bin:/usr/bin/" UML_LIB_PATH);
+ if (putenv("PATH=:/bin:/usr/bin/" UML_LIB_PATH))
+ perror("couldn't putenv");
return;
}
@@ -100,11 +101,14 @@ static void setup_env_path(void)
path_len += strlen("PATH=" UML_LIB_PATH) + 1;
new_path = malloc(path_len);
if (!new_path) {
- perror("coudn't malloc to set a new PATH");
+ perror("couldn't malloc to set a new PATH");
return;
}
snprintf(new_path, path_len, "PATH=%s" UML_LIB_PATH, old_path);
- putenv(new_path);
+ if (putenv(new_path)) {
+ perror("couldn't putenv to set a new PATH");
+ free(new_path);
+ }
}
extern int uml_exitcode;
Index: linux-2.6.22/arch/um/os-Linux/mem.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/mem.c 2007-10-29 12:51:14.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/mem.c 2007-10-29 12:56:18.000000000 -0400
@@ -172,13 +172,15 @@ int __init make_tempfile(const char *tem
which_tmpdir();
tempname = malloc(MAXPATHLEN);
+ if (!tempname)
+ goto out;
find_tempdir();
if (template[0] != '/')
strcpy(tempname, tempdir);
else
tempname[0] = '\0';
- strcat(tempname, template);
+ strncat(tempname, template, MAXPATHLEN-1-strlen(tempname));
fd = mkstemp(tempname);
if(fd < 0){
fprintf(stderr, "open - cannot create %s: %s\n", tempname,
@@ -268,6 +270,7 @@ void __init check_tmpexec(void)
if(addr == MAP_FAILED){
err = errno;
perror("failed");
+ close(fd);
if(err == EPERM)
printf("%s must be not mounted noexec\n",tempdir);
exit(1);
Index: linux-2.6.22/arch/um/os-Linux/signal.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/signal.c 2007-10-29 12:51:14.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/signal.c 2007-10-29 12:57:14.000000000 -0400
@@ -183,7 +183,8 @@ int change_sig(int signal, int on)
sigemptyset(&sigset);
sigaddset(&sigset, signal);
- sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old);
+ if (sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old) < 0)
+ return -errno;
return !sigismember(&old, signal);
}
Index: linux-2.6.22/arch/um/os-Linux/start_up.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/start_up.c 2007-10-29 12:51:14.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/start_up.c 2007-10-29 12:56:18.000000000 -0400
@@ -63,7 +63,7 @@ static int ptrace_child(void)
_exit(ret);
}
-static void fatal_perror(char *str)
+static void fatal_perror(const char *str)
{
perror(str);
exit(1);
-
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