From: Wim Vander Schelden <w...@fixnum.org>
---
linux-user/syscall.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index c134c32..f9fed3e 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4947,6 +4947,54 @@ int host_to_target_waitstatus(int status)
return 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;
+ }
+
+ while(true) {
+ ssize_t nb_read;
+ char buf[128];
+ char* cp_buf = buf;
+
+ nb_read = read(fd_orig, buf, sizeof(buf));
+ if(nb_read < 0)
+ {
+ fd_orig = close(fd_orig);
+ return -1;
+ } else if(nb_read == 0) {
+ break;
+ }
+
+ if(nb_read == 0)
+ break;
+
+ if(! word_skipped) {
+ // Skip the first string, which is the path to qemu-*-static
instead of the actual command.
+ size_t command_length = strnlen(buf, sizeof(buf));
+ if(command_length != sizeof(buf)) {
+ // Null byte found, skip one string
+ nb_read -= command_length + 1;
+ cp_buf += command_length + 1;
+ word_skipped = true;
+ }
+ }
+
+ if(word_skipped) {
+ if(write(fd, cp_buf, nb_read) != nb_read) {
+ return -1;
+ }
+ }
+ }
+
+ return close(fd_orig);
+}
+
static int open_self_maps(void *cpu_env, int fd)
{
#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
@@ -5148,6 +5196,7 @@ static int do_open(void *cpu_env, const char *pathname,
int flags, mode_t mode)
{ "maps", open_self_maps, is_proc_myself },
{ "stat", open_self_stat, is_proc_myself },
{ "auxv", open_self_auxv, is_proc_myself },
+ { "cmdline", open_self_cmdline, is_proc_myself},
#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
{ "/proc/net/route", open_net_route, is_proc },
#endif
--
1.9.1
