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authorWANG Cong <xiyou.wangcong@gmail.com>2008-02-04 22:30:35 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:24 -0800
commitc9a3072d13e4b8a6549ecc1db6390a55c7ee2ddf (patch)
tree7b3eee2e8b71d844b27ed6a1c8d852915934e7f9
parent4d18de45fa921600e1b3770c3a7cb106ab48cd9d (diff)
uml: code tidying under arch/um/os-Linux
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@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/um/include/os.h12
-rw-r--r--arch/um/os-Linux/file.c14
-rw-r--r--arch/um/os-Linux/main.c12
-rw-r--r--arch/um/os-Linux/mem.c5
-rw-r--r--arch/um/os-Linux/signal.c3
-rw-r--r--arch/um/os-Linux/start_up.c2
6 files changed, 28 insertions, 20 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 6f0d1c741bc..82e5aeae2b8 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -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,
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index f8346275862..c3bb5ce70c9 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -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 openflags *mode_out)
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 openflags flags, int mode)
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 *buf, int len)
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 long long *size_out)
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;
@@ -514,7 +514,7 @@ int os_rcv_fd(int fd, int *helper_pid_out)
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;
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 82c3778627b..de664e7ff31 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -73,7 +73,7 @@ static void install_fatal_handler(int sig)
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;
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 436f8d20b20..c3b736adc1d 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -172,13 +172,15 @@ int __init make_tempfile(const char *template, char **out_tempname,
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);
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index e9800b0b568..37302e86fda 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -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);
}
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 7b81f6c08a5..c6cf648a51d 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -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);