From: Filip Bozuta <[email protected]>
This patch implements strace argument printing functionality for syscalls:
*chown, lchown - change ownership of a file
int chown(const char *pathname, uid_t owner, gid_t group)
int lchown(const char *pathname, uid_t owner, gid_t group)
man page: https://www.man7.org/linux/man-pages/man2/lchown.2.html
Implementation notes:
Both syscalls use strings as arguments and thus a separate
printing function was stated in "strace.list" for them.
Both syscalls share the same number and types of arguments
and thus share a same definition in file "syscall.c".
This defintion uses existing functions "print_string()" to
print the string argument and "print_raw_param()" to print
other two arguments that are of basic types.
Signed-off-by: Filip Bozuta <[email protected]>
Reviewed-by: Laurent Vivier <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Laurent Vivier <[email protected]>
---
linux-user/strace.c | 15 +++++++++++++++
linux-user/strace.list | 4 ++--
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/linux-user/strace.c b/linux-user/strace.c
index a26736516bab..957f08f1adf2 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -1452,6 +1452,21 @@ print_chmod(const struct syscallname *name,
}
#endif
+#if defined(TARGET_NR_chown) || defined(TARGET_NR_lchown)
+static void
+print_chown(const struct syscallname *name,
+ abi_long arg0, abi_long arg1, abi_long arg2,
+ abi_long arg3, abi_long arg4, abi_long arg5)
+{
+ print_syscall_prologue(name);
+ print_string(arg0, 0);
+ print_raw_param("%d", arg1, 0);
+ print_raw_param("%d", arg2, 1);
+ print_syscall_epilogue(name);
+}
+#define print_lchown print_chown
+#endif
+
#ifdef TARGET_NR_clock_adjtime
static void
print_clock_adjtime(const struct syscallname *name,
diff --git a/linux-user/strace.list b/linux-user/strace.list
index a4a8c61969cd..e99030c9ef39 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -71,7 +71,7 @@
{ TARGET_NR_chmod, "chmod" , NULL, print_chmod, NULL },
#endif
#ifdef TARGET_NR_chown
-{ TARGET_NR_chown, "chown" , NULL, NULL, NULL },
+{ TARGET_NR_chown, "chown" , NULL, print_chown, NULL },
#endif
#ifdef TARGET_NR_chown32
{ TARGET_NR_chown32, "chown32" , NULL, NULL, NULL },
@@ -475,7 +475,7 @@
{ TARGET_NR_kill, "kill", NULL, print_kill, NULL },
#endif
#ifdef TARGET_NR_lchown
-{ TARGET_NR_lchown, "lchown" , NULL, NULL, NULL },
+{ TARGET_NR_lchown, "lchown" , NULL, print_lchown, NULL },
#endif
#ifdef TARGET_NR_lchown32
{ TARGET_NR_lchown32, "lchown32" , NULL, NULL, NULL },
--
2.26.2
