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| author | Filip Bozuta <Filip.Bozuta@syrmia.com> | 2020-06-19 14:33:30 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2020-06-29 13:08:48 +0200 |
| commit | 5844f4bc4111248b9de0c2efa422cafcdaa69cf1 (patch) | |
| tree | be74b18e9ddf4b0700a5e80307d003afc602e400 /linux-user | |
| parent | af861deaed5aa979522ec72425913295dc050f10 (diff) | |
| download | qemu-5844f4bc4111248b9de0c2efa422cafcdaa69cf1.zip | |
linux-user: Add strace support for printing arguments of chown()/lchown()
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 <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-6-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/strace.c | 15 | ||||
| -rw-r--r-- | 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 a26736516b..957f08f1ad 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 a4a8c61969..e99030c9ef 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 }, |