[PATCH] uml: libc-dependent code should call libc directly

We shouldn't be using the os wrappers from os code - we can use libc directly.
This patch replaces wrapper calls with libc calls.

It turns out that os_sigio_async had only one caller, which was in startup.c,
so that function is moved there and its name changed.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 28 insertions, 31 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 13a86bd383d3..8f602667296d 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -137,7 +137,6 @@ extern int os_new_tty_pgrp(int fd, int pid);
 extern int os_get_ifname(int fd, char *namebuf);
 extern int os_set_slip(int fd);
 extern int os_set_owner(int fd, int pid);
-extern int os_sigio_async(int master, int slave);
 extern int os_mode_fd(int fd, int mode);
 
 extern int os_seek_file(int fd, __u64 offset);
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 189fa677085a..371b4335f46d 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -162,25 +162,6 @@ int os_set_owner(int fd, int pid)
         return 0;
 }
 
-/* FIXME? moved wholesale from sigio_user.c to get fcntls out of that file */
-int os_sigio_async(int master, int slave)
-{
-        int flags;
-
-        flags = fcntl(master, F_GETFL);
-        if(flags < 0)
-                return -errno;
-
-        if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
-           (fcntl(master, F_SETOWN, os_getpid()) < 0))
-                return -errno;
-
-        if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
-                return -errno;
-
-        return(0);
-}
-
 int os_mode_fd(int fd, int mode)
 {
         int err;
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 537084fd834f..735d035a7f33 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -54,7 +54,7 @@ static int ptrace_child(void *arg)
                 perror("ptrace");
                 os_kill_process(pid, 0);
         }
-        os_stop_process(pid);
+        kill(pid, SIGSTOP);
 
         /*This syscall will be intercepted by the parent. Don't call more than
          * once, please.*/
@@ -417,7 +417,7 @@ static inline void check_skas3_ptrace_ldt(void)
 static inline void check_skas3_proc_mm(void)
 {
         printf("  - /proc/mm...");
-        if (os_access("/proc/mm", OS_ACC_W_OK) < 0) {
+        if (access("/proc/mm", W_OK) < 0) {
                 proc_mm = 0;
                 printf("not found\n");
         }
@@ -452,9 +452,9 @@ int can_do_skas(void)
 int __init parse_iomem(char *str, int *add)
 {
         struct iomem_region *new;
-        struct uml_stat buf;
+        struct stat64 buf;
         char *file, *driver;
-        int fd, err, size;
+        int fd, size;
 
         driver = str;
         file = strchr(str,',');
@@ -464,15 +464,14 @@ int __init parse_iomem(char *str, int *add)
         }
         *file = '\0';
         file++;
-        fd = os_open_file(file, of_rdwr(OPENFLAGS()), 0);
+        fd = open(file, O_RDWR, 0);
         if(fd < 0){
                 os_print_error(fd, "parse_iomem - Couldn't open io file");
                 goto out;
         }
 
-        err = os_stat_fd(fd, &buf);
-        if(err < 0){
-                os_print_error(err, "parse_iomem - cannot stat_fd file");
+        if(fstat64(fd, &buf) < 0){
+                perror("parse_iomem - cannot stat_fd file");
                 goto out_close;
         }
 
@@ -482,7 +481,7 @@ int __init parse_iomem(char *str, int *add)
                 goto out_close;
         }
 
-        size = (buf.ust_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
+        size = (buf.st_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
 
         *new = ((struct iomem_region) { .next           = iomem_regions,
                                         .driver         = driver,
@@ -495,7 +494,7 @@ int __init parse_iomem(char *str, int *add)
 
         return 0;
  out_close:
-        os_close_file(fd);
+        close(fd);
  out:
         return 1;
 }
@@ -528,6 +527,24 @@ static void openpty_cb(void *arg)
                 info->err = -errno;
 }
 
+static int async_pty(int master, int slave)
+{
+        int flags;
+
+        flags = fcntl(master, F_GETFL);
+        if(flags < 0)
+                return -errno;
+
+        if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
+           (fcntl(master, F_SETOWN, os_getpid()) < 0))
+                return -errno;
+
+        if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
+                return -errno;
+
+        return(0);
+}
+
 static void __init check_one_sigio(void (*proc)(int, int))
 {
         struct sigaction old, new;
@@ -553,7 +570,7 @@ static void __init check_one_sigio(void (*proc)(int, int))
         if (err < 0)
                 panic("check_sigio : __raw failed, errno = %d\n", -err);
 
-        err = os_sigio_async(master, slave);
+        err = async_pty(master, slave);
         if(err < 0)
                 panic("tty_fds : sigio_async failed, err = %d\n", -err);