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authormidipix <writeonce@midipix.org>2018-06-08 03:47:08 +0000
committermidipix <writeonce@midipix.org>2018-06-08 20:48:12 -0400
commit8ce751a076c92576b232738445994aef1ef53a0a (patch)
treec437e5c8fc9083a2fcb6542d010abc6354b2eaf8 /src/cmds
parent9682ca0c7b54a8bf6c7e3fd7fdfa9b974d955860 (diff)
downloadntux-8ce751a076c92576b232738445994aef1ef53a0a.tar.bz2
ntux-8ce751a076c92576b232738445994aef1ef53a0a.tar.xz
ntux_cmd_strace(): initial implementation and integration.
Diffstat (limited to 'src/cmds')
-rw-r--r--src/cmds/ntux_cmd_strace.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/src/cmds/ntux_cmd_strace.c b/src/cmds/ntux_cmd_strace.c
new file mode 100644
index 0000000..08d7eb4
--- /dev/null
+++ b/src/cmds/ntux_cmd_strace.c
@@ -0,0 +1,137 @@
+/***********************************************************/
+/* ntux: native translation und extension */
+/* Copyright (C) 2016--2018 Z. Gilboa */
+/* Released under GPLv2 and GPLv3; see COPYING.NTUX. */
+/***********************************************************/
+
+#include <ntapi/ntapi.h>
+#include <psxabi/sys_sysapi.h>
+#include <psxabi/sys_strace.h>
+#include <psxabi/sys_fcntl.h>
+#include <psxabi/sys_errno.h>
+
+#include <ntux/ntux.h>
+#include "ntux_driver_impl.h"
+#include "ntux_nolibc_impl.h"
+#include "ntux_errinfo_impl.h"
+
+int ntux_cmd_strace(const struct ntux_driver_ctx * dctx)
+{
+ int32_t status;
+ int ret;
+ pid_t pid;
+ const char ** argv;
+ const char ** envp;
+ unsigned char * program;
+ unsigned char * logfile;
+ struct __strace strace;
+ ssize_t rbytes;
+ ssize_t wbytes;
+ char * ch;
+ char buf[2048];
+ int fdlog[2];
+ int i;
+
+ /* init */
+ ntux_driver_set_ectx(
+ dctx,0,
+ dctx->cctx->sargv[0]);
+
+ argv = (const char **)dctx->cctx->sargv;
+ envp = (const char **)dctx->cctx->senvp;
+ program = (unsigned char *)dctx->cctx->sargv[0];
+ logfile = (unsigned char *)dctx->cctx->logfile;
+
+ /* fdlog */
+ if (logfile) {
+ if ((fdlog[1] = __sys_open(logfile,O_CREAT|O_WRONLY,0)) < 0)
+ if (ntux_errno_set(dctx,fdlog[1]))
+ return NTUX_SYSTEM_ERROR(dctx);
+ } else {
+ if ((ret = __sys_pipe(fdlog)) < 0)
+ if (ntux_errno_set(dctx,ret))
+ return NTUX_SYSTEM_ERROR(dctx);
+ }
+
+ /* strace */
+ strace.size = sizeof(strace);
+ strace.loader = dctx->cctx->loader;
+ strace.fdlog = fdlog[1];
+ strace.flags = 0;
+
+ for (i=0; i<16; i++)
+ strace.sysmask[i] = 0xFFFFFFFF;
+
+ for (i=0; i<16; i++)
+ strace.dbgmask[i] = 0;
+
+ for (i=0; i<32; i++)
+ strace.osmask[i] = 0;
+
+ /* spawn */
+ pid = __sys_vfork();
+
+ /* failed? */
+ if (pid < 0)
+ if (ntux_errno_set(dctx,pid))
+ return NTUX_SYSTEM_ERROR(dctx);
+
+ /* child */
+ if (pid == 0)
+ if ((status = __sys_strace(program,argv,envp,&strace)))
+ if (ntux_errno_set(dctx,status))
+ if (NTUX_SYSTEM_ERROR(dctx))
+ __sys_exit(0);
+
+ /* parent */
+ __sys_close(fdlog[1]);
+
+ if (dctx->cctx->logfile) {
+ __sys_wait4(
+ pid,&status,
+ 0,0);
+
+ return 0;
+ }
+
+ /* piped strace output */
+ rbytes = __sys_read(fdlog[0],buf,sizeof(buf));
+
+ while (rbytes == -EINTR)
+ rbytes = __sys_read(fdlog[0],buf,sizeof(buf));
+
+ while (rbytes > 0) {
+ for (ch=buf; rbytes; ch += wbytes) {
+ wbytes = __sys_write(2,ch,rbytes);
+
+ while (wbytes == -EINTR)
+ wbytes = __sys_write(2,buf,rbytes);
+
+ if (wbytes < 0) {
+ __sys_close(fdlog[0]);
+ ntux_errno_set(dctx,wbytes);
+ return NTUX_SYSTEM_ERROR(dctx);
+ }
+
+ rbytes -= wbytes;
+ }
+
+ rbytes = __sys_read(fdlog[0],buf,sizeof(buf));
+
+ while (rbytes == -EINTR)
+ rbytes = __sys_read(fdlog[0],buf,sizeof(buf));
+ }
+
+ __sys_close(fdlog[0]);
+
+ if (rbytes < 0)
+ if (ntux_errno_set(dctx,rbytes))
+ return NTUX_SYSTEM_ERROR(dctx);
+
+ /* wait */
+ __sys_wait4(
+ pid,&status,
+ 0,0);
+
+ return 0;
+}