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[Qemu-devel] [PATCH] linux-user: identify running binary in /proc/self/e
From: |
Riku Voipio |
Subject: |
[Qemu-devel] [PATCH] linux-user: identify running binary in /proc/self/exe |
Date: |
Mon, 19 Jan 2009 17:30:08 +0200 |
User-agent: |
Mutt/1.5.11+cvs20060126 |
Some applications like to test /proc/self/exe to find
out who they are. Fake the result of readlink() for
them.
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/main.c | 3 +++
linux-user/qemu.h | 1 +
linux-user/syscall.c | 9 +++++++--
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 3019f33..2ffe244 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -34,6 +34,8 @@
#define DEBUG_LOGFILE "/tmp/qemu.log"
+char *exec_path;
+
static const char *interp_prefix = CONFIG_QEMU_PREFIX;
const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
@@ -2314,6 +2316,7 @@ int main(int argc, char **argv, char **envp)
if (optind >= argc)
usage();
filename = argv[optind];
+ exec_path = argv[optind];
/* Zero out regs */
memset(regs, 0, sizeof(struct target_pt_regs));
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 9fddd05..4137567 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -120,6 +120,7 @@ typedef struct TaskState {
uint8_t stack[0];
} __attribute__((aligned(16))) TaskState;
+extern char *exec_path;
void init_task_state(TaskState *ts);
extern const char *qemu_uname_release;
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index adb27de..53167e9 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4720,8 +4720,13 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
p2 = lock_user(VERIFY_WRITE, arg2, arg3, 0);
if (!p || !p2)
ret = -TARGET_EFAULT;
- else
- ret = get_errno(readlink(path(p), p2, arg3));
+ else {
+ if (strncmp((const char *)p, "/proc/self/exe", 14) == 0)
+ ret = get_errno(snprintf((char *)p2, arg3, "%s",
exec_path));
+ else
+ ret = get_errno(readlink(path(p), p2, arg3));
+ break;
+ }
unlock_user(p2, arg2, ret);
unlock_user(p, arg1, 0);
}
--
1.5.6.5
--
"rm -rf" only sounds scary if you don't have backups
- [Qemu-devel] [PATCH] linux-user: identify running binary in /proc/self/exe,
Riku Voipio <=