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uml: style fixes in file.c

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arch/um/os-Linux/file.c needed some style work -
	updated the copyright
	cleaned up the includes
	CodingStyle fixes
	added some missing CATCH_EINTRs
	os_set_owner was unused, so it is gone
	all printks now have severities
	fcntl(F_GETFL) was being called without checking the return
	removed an obsolete comment

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>
This commit is contained in:
Jeff Dike 2008-02-04 22:31:05 -08:00 committed by Linus Torvalds
parent bf8fde785b
commit 1adfd6095e
2 changed files with 118 additions and 115 deletions
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1
arch/um/include/os.h
View File

@ -131,7 +131,6 @@ extern int os_set_exec_close(int fd);
extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
extern int os_get_ifname(int fd, char *namebuf); extern int os_get_ifname(int fd, char *namebuf);
extern int os_set_slip(int fd); extern int os_set_slip(int fd);
extern int os_set_owner(int fd, int pid);
extern int os_mode_fd(int fd, int mode); extern int os_mode_fd(int fd, int mode);
extern int os_seek_file(int fd, unsigned long long offset); extern int os_seek_file(int fd, unsigned long long offset);

232
arch/um/os-Linux/file.c
View File

@ -1,5 +1,5 @@
/* /*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL * Licensed under the GPL
*/ */
@ -8,13 +8,12 @@
#include <errno.h> #include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#include <signal.h> #include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <sys/mount.h> #include <sys/mount.h>
#include <sys/uio.h> #include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include "kern_constants.h"
#include "os.h" #include "os.h"
#include "user.h" #include "user.h"
@ -42,10 +41,10 @@ int os_stat_fd(const int fd, struct uml_stat *ubuf)
int err; int err;
CATCH_EINTR(err = fstat64(fd, &sbuf)); CATCH_EINTR(err = fstat64(fd, &sbuf));
if(err < 0) if (err < 0)
return -errno; return -errno;
if(ubuf != NULL) if (ubuf != NULL)
copy_stat(ubuf, &sbuf); copy_stat(ubuf, &sbuf);
return err; return err;
} }
@ -55,27 +54,26 @@ int os_stat_file(const char *file_name, struct uml_stat *ubuf)
struct stat64 sbuf; struct stat64 sbuf;
int err; int err;
do { CATCH_EINTR(err = stat64(file_name, &sbuf));
err = stat64(file_name, &sbuf); if (err < 0)
} while((err < 0) && (errno == EINTR)) ;
if(err < 0)
return -errno; return -errno;
if(ubuf != NULL) if (ubuf != NULL)
copy_stat(ubuf, &sbuf); copy_stat(ubuf, &sbuf);
return err; return err;
} }
int os_access(const char* file, int mode) int os_access(const char *file, int mode)
{ {
int amode, err; int amode, err;
amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) | amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
(mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ; (mode & OS_ACC_W_OK ? W_OK : 0) |
(mode & OS_ACC_X_OK ? X_OK : 0) |
(mode & OS_ACC_F_OK ? F_OK : 0);
err = access(file, amode); err = access(file, amode);
if(err < 0) if (err < 0)
return -errno; return -errno;
return 0; return 0;
@ -87,7 +85,7 @@ int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
int err; int err;
err = ioctl(fd, cmd, arg); err = ioctl(fd, cmd, arg);
if(err < 0) if (err < 0)
return -errno; return -errno;
return err; return err;
@ -96,7 +94,7 @@ int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
/* FIXME: ensure namebuf in os_get_if_name is big enough */ /* FIXME: ensure namebuf in os_get_if_name is big enough */
int os_get_ifname(int fd, char* namebuf) int os_get_ifname(int fd, char* namebuf)
{ {
if(ioctl(fd, SIOCGIFNAME, namebuf) < 0) if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
return -errno; return -errno;
return 0; return 0;
@ -107,37 +105,22 @@ int os_set_slip(int fd)
int disc, sencap; int disc, sencap;
disc = N_SLIP; disc = N_SLIP;
if(ioctl(fd, TIOCSETD, &disc) < 0) if (ioctl(fd, TIOCSETD, &disc) < 0)
return -errno; return -errno;
sencap = 0; sencap = 0;
if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0) if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
return -errno; return -errno;
return 0; return 0;
} }
int os_set_owner(int fd, int pid)
{
if(fcntl(fd, F_SETOWN, pid) < 0){
int save_errno = errno;
if(fcntl(fd, F_GETOWN, 0) != pid)
return -save_errno;
}
return 0;
}
int os_mode_fd(int fd, int mode) int os_mode_fd(int fd, int mode)
{ {
int err; int err;
do { CATCH_EINTR(err = fchmod(fd, mode));
err = fchmod(fd, mode); if (err < 0)
} while((err < 0) && (errno==EINTR)) ;
if(err < 0)
return -errno; return -errno;
return 0; return 0;
@ -149,20 +132,20 @@ int os_file_type(char *file)
int err; int err;
err = os_stat_file(file, &buf); err = os_stat_file(file, &buf);
if(err < 0) if (err < 0)
return err; return err;
if(S_ISDIR(buf.ust_mode)) if (S_ISDIR(buf.ust_mode))
return OS_TYPE_DIR; return OS_TYPE_DIR;
else if(S_ISLNK(buf.ust_mode)) else if (S_ISLNK(buf.ust_mode))
return OS_TYPE_SYMLINK; return OS_TYPE_SYMLINK;
else if(S_ISCHR(buf.ust_mode)) else if (S_ISCHR(buf.ust_mode))
return OS_TYPE_CHARDEV; return OS_TYPE_CHARDEV;
else if(S_ISBLK(buf.ust_mode)) else if (S_ISBLK(buf.ust_mode))
return OS_TYPE_BLOCKDEV; return OS_TYPE_BLOCKDEV;
else if(S_ISFIFO(buf.ust_mode)) else if (S_ISFIFO(buf.ust_mode))
return OS_TYPE_FIFO; return OS_TYPE_FIFO;
else if(S_ISSOCK(buf.ust_mode)) else if (S_ISSOCK(buf.ust_mode))
return OS_TYPE_SOCK; return OS_TYPE_SOCK;
else return OS_TYPE_FILE; else return OS_TYPE_FILE;
} }
@ -174,15 +157,15 @@ int os_file_mode(const char *file, struct openflags *mode_out)
*mode_out = OPENFLAGS(); *mode_out = OPENFLAGS();
err = access(file, W_OK); err = access(file, W_OK);
if(err && (errno != EACCES)) if (err && (errno != EACCES))
return -errno; return -errno;
else if(!err) else if (!err)
*mode_out = of_write(*mode_out); *mode_out = of_write(*mode_out);
err = access(file, R_OK); err = access(file, R_OK);
if(err && (errno != EACCES)) if (err && (errno != EACCES))
return -errno; return -errno;
else if(!err) else if (!err)
*mode_out = of_read(*mode_out); *mode_out = of_read(*mode_out);
return err; return err;
@ -192,21 +175,28 @@ int os_open_file(const char *file, struct openflags flags, int mode)
{ {
int fd, err, f = 0; int fd, err, f = 0;
if(flags.r && flags.w) f = O_RDWR; if (flags.r && flags.w)
else if(flags.r) f = O_RDONLY; f = O_RDWR;
else if(flags.w) f = O_WRONLY; else if (flags.r)
f = O_RDONLY;
else if (flags.w)
f = O_WRONLY;
else f = 0; else f = 0;
if(flags.s) f |= O_SYNC; if (flags.s)
if(flags.c) f |= O_CREAT; f |= O_SYNC;
if(flags.t) f |= O_TRUNC; if (flags.c)
if(flags.e) f |= O_EXCL; f |= O_CREAT;
if (flags.t)
f |= O_TRUNC;
if (flags.e)
f |= O_EXCL;
fd = open64(file, f, mode); fd = open64(file, f, mode);
if(fd < 0) if (fd < 0)
return -errno; return -errno;
if(flags.cl && fcntl(fd, F_SETFD, 1)){ if (flags.cl && fcntl(fd, F_SETFD, 1)) {
err = -errno; err = -errno;
close(fd); close(fd);
return err; return err;
@ -224,13 +214,13 @@ int os_connect_socket(const char *name)
snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name); snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
fd = socket(AF_UNIX, SOCK_STREAM, 0); fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd < 0) { if (fd < 0) {
err = -errno; err = -errno;
goto out; goto out;
} }
err = connect(fd, (struct sockaddr *) &sock, sizeof(sock)); err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
if(err) { if (err) {
err = -errno; err = -errno;
goto out_close; goto out_close;
} }
@ -253,7 +243,7 @@ int os_seek_file(int fd, unsigned long long offset)
unsigned long long actual; unsigned long long actual;
actual = lseek64(fd, offset, SEEK_SET); actual = lseek64(fd, offset, SEEK_SET);
if(actual != offset) if (actual != offset)
return -errno; return -errno;
return 0; return 0;
} }
@ -262,7 +252,7 @@ int os_read_file(int fd, void *buf, int len)
{ {
int n = read(fd, buf, len); int n = read(fd, buf, len);
if(n < 0) if (n < 0)
return -errno; return -errno;
return n; return n;
} }
@ -271,7 +261,7 @@ int os_write_file(int fd, const void *buf, int len)
{ {
int n = write(fd, (void *) buf, len); int n = write(fd, (void *) buf, len);
if(n < 0) if (n < 0)
return -errno; return -errno;
return n; return n;
} }
@ -282,26 +272,27 @@ int os_file_size(const char *file, unsigned long long *size_out)
int err; int err;
err = os_stat_file(file, &buf); err = os_stat_file(file, &buf);
if(err < 0){ if (err < 0) {
printk("Couldn't stat \"%s\" : err = %d\n", file, -err); printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
-err);
return err; return err;
} }
if(S_ISBLK(buf.ust_mode)){ if (S_ISBLK(buf.ust_mode)) {
int fd; int fd;
long blocks; long blocks;
fd = open(file, O_RDONLY, 0); fd = open(file, O_RDONLY, 0);
if(fd < 0) { if (fd < 0) {
err = -errno; err = -errno;
printk("Couldn't open \"%s\", errno = %d\n", file, printk(UM_KERN_ERR "Couldn't open \"%s\", "
errno); "errno = %d\n", file, errno);
return err; return err;
} }
if(ioctl(fd, BLKGETSIZE, &blocks) < 0){ if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
err = -errno; err = -errno;
printk("Couldn't get the block size of \"%s\", " printk(UM_KERN_ERR "Couldn't get the block size of "
"errno = %d\n", file, errno); "\"%s\", errno = %d\n", file, errno);
close(fd); close(fd);
return err; return err;
} }
@ -319,8 +310,9 @@ int os_file_modtime(const char *file, unsigned long *modtime)
int err; int err;
err = os_stat_file(file, &buf); err = os_stat_file(file, &buf);
if(err < 0){ if (err < 0) {
printk("Couldn't stat \"%s\" : err = %d\n", file, -err); printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
-err);
return err; return err;
} }
@ -334,7 +326,7 @@ int os_set_exec_close(int fd)
CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC)); CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
if(err < 0) if (err < 0)
return -errno; return -errno;
return err; return err;
} }
@ -344,24 +336,25 @@ int os_pipe(int *fds, int stream, int close_on_exec)
int err, type = stream ? SOCK_STREAM : SOCK_DGRAM; int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
err = socketpair(AF_UNIX, type, 0, fds); err = socketpair(AF_UNIX, type, 0, fds);
if(err < 0) if (err < 0)
return -errno; return -errno;
if(!close_on_exec) if (!close_on_exec)
return 0; return 0;
err = os_set_exec_close(fds[0]); err = os_set_exec_close(fds[0]);
if(err < 0) if (err < 0)
goto error; goto error;
err = os_set_exec_close(fds[1]); err = os_set_exec_close(fds[1]);
if(err < 0) if (err < 0)
goto error; goto error;
return 0; return 0;
error: error:
printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err); printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
-err);
close(fds[1]); close(fds[1]);
close(fds[0]); close(fds[0]);
return err; return err;
@ -378,15 +371,15 @@ int os_set_fd_async(int fd)
flags |= O_ASYNC | O_NONBLOCK; flags |= O_ASYNC | O_NONBLOCK;
if (fcntl(fd, F_SETFL, flags) < 0) { if (fcntl(fd, F_SETFL, flags) < 0) {
err = -errno; err = -errno;
printk("os_set_fd_async : failed to set O_ASYNC and " printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
"O_NONBLOCK on fd # %d, errno = %d\n", fd, errno); "and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
return err; return err;
} }
if ((fcntl(fd, F_SETSIG, SIGIO) < 0) || if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
(fcntl(fd, F_SETOWN, os_getpid()) < 0)) { (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
err = -errno; err = -errno;
printk("os_set_fd_async : Failed to fcntl F_SETOWN " printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
"(or F_SETSIG) fd %d, errno = %d\n", fd, errno); "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
return err; return err;
} }
@ -396,10 +389,14 @@ int os_set_fd_async(int fd)
int os_clear_fd_async(int fd) int os_clear_fd_async(int fd)
{ {
int flags = fcntl(fd, F_GETFL); int flags;
flags = fcntl(fd, F_GETFL);
if (flags < 0)
return -errno;
flags &= ~(O_ASYNC | O_NONBLOCK); flags &= ~(O_ASYNC | O_NONBLOCK);
if(fcntl(fd, F_SETFL, flags) < 0) if (fcntl(fd, F_SETFL, flags) < 0)
return -errno; return -errno;
return 0; return 0;
} }
@ -409,11 +406,15 @@ int os_set_fd_block(int fd, int blocking)
int flags; int flags;
flags = fcntl(fd, F_GETFL); flags = fcntl(fd, F_GETFL);
if (flags < 0)
return -errno;
if(blocking) flags &= ~O_NONBLOCK; if (blocking)
else flags |= O_NONBLOCK; flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
if(fcntl(fd, F_SETFL, flags) < 0) if (fcntl(fd, F_SETFL, flags) < 0)
return -errno; return -errno;
return 0; return 0;
@ -424,7 +425,7 @@ int os_accept_connection(int fd)
int new; int new;
new = accept(fd, NULL, 0); new = accept(fd, NULL, 0);
if(new < 0) if (new < 0)
return -errno; return -errno;
return new; return new;
} }
@ -445,15 +446,17 @@ int os_shutdown_socket(int fd, int r, int w)
{ {
int what, err; int what, err;
if(r && w) what = SHUT_RDWR; if (r && w)
else if(r) what = SHUT_RD; what = SHUT_RDWR;
else if(w) what = SHUT_WR; else if (r)
else { what = SHUT_RD;
printk("os_shutdown_socket : neither r or w was set\n"); else if (w)
what = SHUT_WR;
else
return -EINVAL; return -EINVAL;
}
err = shutdown(fd, what); err = shutdown(fd, what);
if(err < 0) if (err < 0)
return -errno; return -errno;
return 0; return 0;
} }
@ -477,19 +480,20 @@ int os_rcv_fd(int fd, int *helper_pid_out)
msg.msg_flags = 0; msg.msg_flags = 0;
n = recvmsg(fd, &msg, 0); n = recvmsg(fd, &msg, 0);
if(n < 0) if (n < 0)
return -errno; return -errno;
else if(n != iov.iov_len) else if (n != iov.iov_len)
*helper_pid_out = -1; *helper_pid_out = -1;
cmsg = CMSG_FIRSTHDR(&msg); cmsg = CMSG_FIRSTHDR(&msg);
if(cmsg == NULL){ if (cmsg == NULL) {
printk("rcv_fd didn't receive anything, error = %d\n", errno); printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
"error = %d\n", errno);
return -1; return -1;
} }
if((cmsg->cmsg_level != SOL_SOCKET) || if ((cmsg->cmsg_level != SOL_SOCKET) ||
(cmsg->cmsg_type != SCM_RIGHTS)){ (cmsg->cmsg_type != SCM_RIGHTS)) {
printk("rcv_fd didn't receive a descriptor\n"); printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
return -1; return -1;
} }
@ -503,23 +507,22 @@ int os_create_unix_socket(const char *file, int len, int close_on_exec)
int sock, err; int sock, err;
sock = socket(PF_UNIX, SOCK_DGRAM, 0); sock = socket(PF_UNIX, SOCK_DGRAM, 0);
if(sock < 0) if (sock < 0)
return -errno; return -errno;
if(close_on_exec) { if (close_on_exec) {
err = os_set_exec_close(sock); err = os_set_exec_close(sock);
if(err < 0) if (err < 0)
printk("create_unix_socket : close_on_exec failed, " printk(UM_KERN_ERR "create_unix_socket : "
"err = %d", -err); "close_on_exec failed, err = %d", -err);
} }
addr.sun_family = AF_UNIX; addr.sun_family = AF_UNIX;
/* XXX Be more careful about overflow */
snprintf(addr.sun_path, len, "%s", file); snprintf(addr.sun_path, len, "%s", file);
err = bind(sock, (struct sockaddr *) &addr, sizeof(addr)); err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
if(err < 0) if (err < 0)
return -errno; return -errno;
return sock; return sock;
@ -540,17 +543,18 @@ int os_lock_file(int fd, int excl)
int err, save; int err, save;
err = fcntl(fd, F_SETLK, &lock); err = fcntl(fd, F_SETLK, &lock);
if(!err) if (!err)
goto out; goto out;
save = -errno; save = -errno;
err = fcntl(fd, F_GETLK, &lock); err = fcntl(fd, F_GETLK, &lock);
if(err){ if (err) {
err = -errno; err = -errno;
goto out; goto out;
} }
printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid); printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
lock.l_pid);
err = save; err = save;
out: out:
return err; return err;