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user: compile path.c only once

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Also merge bsd-user/path.c and linux-user/path.c.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2009-08-15 07:51:59 +00:00
parent 0bf5e443bd
commit 370220865b
7 changed files with 8 additions and 168 deletions
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2
Makefile
View file

@ -162,7 +162,7 @@ libqemu_common.a: $(obj-y)
#######################################################################
# user-obj-y is code used by qemu userspace emulation
user-obj-y = cutils.o cache-utils.o
user-obj-y = cutils.o cache-utils.o path.o
libqemu_user.a: $(user-obj-y)

4
Makefile.target
View file

@ -86,7 +86,7 @@ ifdef CONFIG_LINUX_USER
VPATH+=:$(SRC_PATH)/linux-user:$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR)
QEMU_CFLAGS+=-I$(SRC_PATH)/linux-user -I$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR)
obj-y = main.o syscall.o strace.o mmap.o signal.o path.o thunk.o \
obj-y = main.o syscall.o strace.o mmap.o signal.o thunk.o \
elfload.o linuxload.o uaccess.o envlist.o gdbstub.o gdbstub-xml.o \
ioport-user.o
obj-$(TARGET_HAS_BFLT) += flatload.o
@ -132,7 +132,7 @@ ifdef CONFIG_BSD_USER
VPATH+=:$(SRC_PATH)/bsd-user
QEMU_CFLAGS+=-I$(SRC_PATH)/bsd-user -I$(SRC_PATH)/bsd-user/$(TARGET_ARCH)
obj-y = main.o bsdload.o elfload.o mmap.o path.o signal.o strace.o syscall.o \
obj-y = main.o bsdload.o elfload.o mmap.o signal.o strace.o syscall.o \
gdbstub.o gdbstub-xml.o ioport-user.o
obj-y += uaccess.o

2
bsd-user/qemu.h
View file

@ -137,8 +137,6 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
extern THREAD CPUState *thread_env;
void cpu_loop(CPUState *env, enum BSDType bsd_type);
void init_paths(const char *prefix);
const char *path(const char *pathname);
char *target_strerror(int err);
int get_osversion(void);
void fork_start(void);

159
linux-user/path.c
View file

@ -1,159 +0,0 @@
/* Code to mangle pathnames into those matching a given prefix.
eg. open("/lib/foo.so") => open("/usr/gnemul/i386-linux/lib/foo.so");
The assumption is that this area does not change.
*/
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include "qemu.h"
struct pathelem
{
/* Name of this, eg. lib */
char *name;
/* Full path name, eg. /usr/gnemul/x86-linux/lib. */
char *pathname;
struct pathelem *parent;
/* Children */
unsigned int num_entries;
struct pathelem *entries[0];
};
static struct pathelem *base;
/* First N chars of S1 match S2, and S2 is N chars long. */
static int strneq(const char *s1, unsigned int n, const char *s2)
{
unsigned int i;
for (i = 0; i < n; i++)
if (s1[i] != s2[i])
return 0;
return s2[i] == 0;
}
static struct pathelem *add_entry(struct pathelem *root, const char *name);
static struct pathelem *new_entry(const char *root,
struct pathelem *parent,
const char *name)
{
struct pathelem *new = malloc(sizeof(*new));
new->name = strdup(name);
asprintf(&new->pathname, "%s/%s", root, name);
new->num_entries = 0;
return new;
}
#define streq(a,b) (strcmp((a), (b)) == 0)
static struct pathelem *add_dir_maybe(struct pathelem *path)
{
DIR *dir;
if ((dir = opendir(path->pathname)) != NULL) {
struct dirent *dirent;
while ((dirent = readdir(dir)) != NULL) {
if (!streq(dirent->d_name,".") && !streq(dirent->d_name,"..")){
path = add_entry(path, dirent->d_name);
}
}
closedir(dir);
}
return path;
}
static struct pathelem *add_entry(struct pathelem *root, const char *name)
{
root->num_entries++;
root = realloc(root, sizeof(*root)
+ sizeof(root->entries[0])*root->num_entries);
root->entries[root->num_entries-1] = new_entry(root->pathname, root, name);
root->entries[root->num_entries-1]
= add_dir_maybe(root->entries[root->num_entries-1]);
return root;
}
/* This needs to be done after tree is stabilized (ie. no more reallocs!). */
static void set_parents(struct pathelem *child, struct pathelem *parent)
{
unsigned int i;
child->parent = parent;
for (i = 0; i < child->num_entries; i++)
set_parents(child->entries[i], child);
}
/* FIXME: Doesn't handle DIR/.. where DIR is not in emulated dir. */
static const char *
follow_path(const struct pathelem *cursor, const char *name)
{
unsigned int i, namelen;
name += strspn(name, "/");
namelen = strcspn(name, "/");
if (namelen == 0)
return cursor->pathname;
if (strneq(name, namelen, ".."))
return follow_path(cursor->parent, name + namelen);
if (strneq(name, namelen, "."))
return follow_path(cursor, name + namelen);
for (i = 0; i < cursor->num_entries; i++)
if (strneq(name, namelen, cursor->entries[i]->name))
return follow_path(cursor->entries[i], name + namelen);
/* Not found */
return NULL;
}
void init_paths(const char *prefix)
{
char pref_buf[PATH_MAX];
if (prefix[0] == '\0' ||
!strcmp(prefix, "/"))
return;
if (prefix[0] != '/') {
char *cwd = get_current_dir_name();
if (!cwd)
abort();
strcpy(pref_buf, cwd);
strcat(pref_buf, "/");
strcat(pref_buf, prefix);
free(cwd);
} else
strcpy(pref_buf,prefix + 1);
base = new_entry("", NULL, pref_buf);
base = add_dir_maybe(base);
if (base->num_entries == 0) {
free (base);
base = NULL;
} else {
set_parents(base, base);
}
}
/* Look for path in emulation dir, otherwise return name. */
const char *path(const char *name)
{
/* Only do absolute paths: quick and dirty, but should mostly be OK.
Could do relative by tracking cwd. */
if (!base || !name || name[0] != '/')
return name;
return follow_path(base, name) ?: name;
}

2
linux-user/qemu.h
View file

@ -190,8 +190,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
extern THREAD CPUState *thread_env;
void cpu_loop(CPUState *env);
void init_paths(const char *prefix);
const char *path(const char *pathname);
char *target_strerror(int err);
int get_osversion(void);
void fork_start(void);

3
bsd-user/path.c → path.c
View file

@ -11,7 +11,6 @@
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include "qemu.h"
#include "qemu-common.h"
struct pathelem
@ -156,7 +155,7 @@ const char *path(const char *name)
{
/* Only do absolute paths: quick and dirty, but should mostly be OK.
Could do relative by tracking cwd. */
if (!base || name[0] != '/')
if (!base || !name || name[0] != '/')
return name;
return follow_path(base, name) ?: name;

4
qemu-common.h
View file

@ -115,6 +115,10 @@ int qemu_strnlen(const char *s, int max_len);
time_t mktimegm(struct tm *tm);
int qemu_fls(int i);
/* path.c */
void init_paths(const char *prefix);
const char *path(const char *pathname);
#define qemu_isalnum(c) isalnum((unsigned char)(c))
#define qemu_isalpha(c) isalpha((unsigned char)(c))
#define qemu_iscntrl(c) iscntrl((unsigned char)(c))