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authorAndreas Schwab <schwab@suse.de>2017-03-20 12:31:55 +0100
committerRiku Voipio <riku.voipio@linaro.org>2017-05-29 14:56:08 +0300
commit58de8b9684cc7b4b1fb3cd47678a04d6924b28de (patch)
treedf922c6099fe832ee1ef49322fd59bc464879541 /linux-user
parentb936cb50aacf3cccf5d2363095c6547eb709583a (diff)
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linux-user: remove all traces of qemu from /proc/self/cmdline
Instead of post-processing the real contents use the remembered target argv. That removes all traces of qemu, including command line options, and handles QEMU_ARGV0. Signed-off-by: Andreas Schwab <schwab@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c47
1 files changed, 7 insertions, 40 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index c8f6efc..909dde6 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7358,52 +7358,19 @@ int host_to_target_waitstatus(int status)
static int open_self_cmdline(void *cpu_env, int fd)
{
- int fd_orig = -1;
- bool word_skipped = false;
-
- fd_orig = open("/proc/self/cmdline", O_RDONLY);
- if (fd_orig < 0) {
- return fd_orig;
- }
+ CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
+ struct linux_binprm *bprm = ((TaskState *)cpu->opaque)->bprm;
+ int i;
- while (true) {
- ssize_t nb_read;
- char buf[128];
- char *cp_buf = buf;
+ for (i = 0; i < bprm->argc; i++) {
+ size_t len = strlen(bprm->argv[i]) + 1;
- nb_read = read(fd_orig, buf, sizeof(buf));
- if (nb_read < 0) {
- int e = errno;
- fd_orig = close(fd_orig);
- errno = e;
+ if (write(fd, bprm->argv[i], len) != len) {
return -1;
- } else if (nb_read == 0) {
- break;
- }
-
- if (!word_skipped) {
- /* Skip the first string, which is the path to qemu-*-static
- instead of the actual command. */
- cp_buf = memchr(buf, 0, nb_read);
- if (cp_buf) {
- /* Null byte found, skip one string */
- cp_buf++;
- nb_read -= cp_buf - buf;
- word_skipped = true;
- }
- }
-
- if (word_skipped) {
- if (write(fd, cp_buf, nb_read) != nb_read) {
- int e = errno;
- close(fd_orig);
- errno = e;
- return -1;
- }
}
}
- return close(fd_orig);
+ return 0;
}
static int open_self_maps(void *cpu_env, int fd)