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Date: Tue, 3 Nov 2015 22:20:47 +0200
From: Octavian Purdila <octavian.purdila@...el.com>
To: linux-arch@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, thehajime@...il.com,
Octavian Purdila <octavian.purdila@...el.com>
Subject: [RFC PATCH 16/28] lkl tools: host lib: add lkl_strerror and lkl_printf
Add basic utility functions for getting a string from a kernel error
code and a fprintf like function that uses the host print
operation. The latter is useful for informing the user about errors
that occur in the host library.
Signed-off-by: Octavian Purdila <octavian.purdila@...el.com>
---
tools/lkl/include/lkl.h | 8 ++
tools/lkl/include/lkl_host.h | 7 ++
tools/lkl/lib/utils.c | 177 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 192 insertions(+)
create mode 100644 tools/lkl/lib/utils.c
diff --git a/tools/lkl/include/lkl.h b/tools/lkl/include/lkl.h
index 2de5ed4..958614d 100644
--- a/tools/lkl/include/lkl.h
+++ b/tools/lkl/include/lkl.h
@@ -12,4 +12,12 @@ static inline long lkl_sys_lseek(unsigned int fd, __lkl__kernel_loff_t off,
return lkl_sys_llseek(fd, off >> 32, off & 0xffffffff, res, whence);
}
+/**
+ * lkl_strerror - returns a string describing the given error code
+ *
+ * @err - error code
+ * @returns - string for the given error code
+ */
+const char *lkl_strerror(int err);
+
#endif
diff --git a/tools/lkl/include/lkl_host.h b/tools/lkl/include/lkl_host.h
index 8ee9ba0..9f1c270 100644
--- a/tools/lkl/include/lkl_host.h
+++ b/tools/lkl/include/lkl_host.h
@@ -6,4 +6,11 @@
extern struct lkl_host_operations lkl_host_ops;
+/**
+ * lkl_printf - print a message via the host print operation
+ *
+ * @fmt - printf like format string
+ */
+int lkl_printf(const char *fmt, ...);
+
#endif
diff --git a/tools/lkl/lib/utils.c b/tools/lkl/lib/utils.c
new file mode 100644
index 0000000..f8b676f
--- /dev/null
+++ b/tools/lkl/lib/utils.c
@@ -0,0 +1,177 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <lkl_host.h>
+
+static const char * const lkl_err_strings[] = {
+ "Success",
+ "Operation not permitted",
+ "No such file or directory",
+ "No such process",
+ "Interrupted system call",
+ "I/O error",
+ "No such device or address",
+ "Argument list too long",
+ "Exec format error",
+ "Bad file number",
+ "No child processes",
+ "Try again",
+ "Out of memory",
+ "Permission denied",
+ "Bad address",
+ "Block device required",
+ "Device or resource busy",
+ "File exists",
+ "Cross-device link",
+ "No such device",
+ "Not a directory",
+ "Is a directory",
+ "Invalid argument",
+ "File table overflow",
+ "Too many open files",
+ "Not a typewriter",
+ "Text file busy",
+ "File too large",
+ "No space left on device",
+ "Illegal seek",
+ "Read-only file system",
+ "Too many links",
+ "Broken pipe",
+ "Math argument out of domain of func",
+ "Math result not representable",
+ "Resource deadlock would occur",
+ "File name too long",
+ "No record locks available",
+ "Invalid system call number",
+ "Directory not empty",
+ "Too many symbolic links encountered",
+ "Bad error code", /* EWOULDBLOCK is EAGAIN */
+ "No message of desired type",
+ "Identifier removed",
+ "Channel number out of range",
+ "Level 2 not synchronized",
+ "Level 3 halted",
+ "Level 3 reset",
+ "Link number out of range",
+ "Protocol driver not attached",
+ "No CSI structure available",
+ "Level 2 halted",
+ "Invalid exchange",
+ "Invalid request descriptor",
+ "Exchange full",
+ "No anode",
+ "Invalid request code",
+ "Invalid slot",
+ "Bad error code", /* EDEADLOCK is EDEADLK */
+ "Bad font file format",
+ "Device not a stream",
+ "No data available",
+ "Timer expired",
+ "Out of streams resources",
+ "Machine is not on the network",
+ "Package not installed",
+ "Object is remote",
+ "Link has been severed",
+ "Advertise error",
+ "Srmount error",
+ "Communication error on send",
+ "Protocol error",
+ "Multihop attempted",
+ "RFS specific error",
+ "Not a data message",
+ "Value too large for defined data type",
+ "Name not unique on network",
+ "File descriptor in bad state",
+ "Remote address changed",
+ "Can not access a needed shared library",
+ "Accessing a corrupted shared library",
+ ".lib section in a.out corrupted",
+ "Attempting to link in too many shared libraries",
+ "Cannot exec a shared library directly",
+ "Illegal byte sequence",
+ "Interrupted system call should be restarted",
+ "Streams pipe error",
+ "Too many users",
+ "Socket operation on non-socket",
+ "Destination address required",
+ "Message too long",
+ "Protocol wrong type for socket",
+ "Protocol not available",
+ "Protocol not supported",
+ "Socket type not supported",
+ "Operation not supported on transport endpoint",
+ "Protocol family not supported",
+ "Address family not supported by protocol",
+ "Address already in use",
+ "Cannot assign requested address",
+ "Network is down",
+ "Network is unreachable",
+ "Network dropped connection because of reset",
+ "Software caused connection abort",
+ "Connection reset by peer",
+ "No buffer space available",
+ "Transport endpoint is already connected",
+ "Transport endpoint is not connected",
+ "Cannot send after transport endpoint shutdown",
+ "Too many references: cannot splice",
+ "Connection timed out",
+ "Connection refused",
+ "Host is down",
+ "No route to host",
+ "Operation already in progress",
+ "Operation now in progress",
+ "Stale file handle",
+ "Structure needs cleaning",
+ "Not a XENIX named type file",
+ "No XENIX semaphores available",
+ "Is a named type file",
+ "Remote I/O error",
+ "Quota exceeded",
+ "No medium found",
+ "Wrong medium type",
+ "Operation Canceled",
+ "Required key not available",
+ "Key has expired",
+ "Key has been revoked",
+ "Key was rejected by service",
+ "Owner died",
+ "State not recoverable",
+ "Operation not possible due to RF-kill",
+ "Memory page has hardware error",
+};
+
+const char *lkl_strerror(int err)
+{
+ if (err < 0)
+ err = -err;
+
+ if (err >= sizeof(lkl_err_strings) / sizeof(const char *))
+ return "Bad error code";
+
+ return lkl_err_strings[err];
+}
+
+int lkl_printf(const char *fmt, ...)
+{
+ char *buffer;
+ va_list args, copy;
+ int n;
+
+ va_start(args, fmt);
+ va_copy(copy, args);
+ n = vsnprintf(NULL, 0, fmt, copy);
+ va_end(copy);
+
+ buffer = lkl_host_ops.mem_alloc(n + 1);
+ if (!buffer) {
+ va_end(args);
+ return 0;
+ }
+ vsnprintf(buffer, n + 1, fmt, args);
+ va_end(args);
+
+ lkl_host_ops.print(buffer, n);
+
+ lkl_host_ops.mem_free(buffer);
+
+ return n;
+}
--
2.1.0
--
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