Improve support for DOS-like systems.

Here DOS-like means DOS, Windows, and OS/2.

diff --git a/src/common/physmem.h b/src/common/physmem.h
index c9d5039..fb17eac 100644 (file)
--- a/src/common/physmem.h
+++ b/src/common/physmem.h
@@ -34,6 +34,10 @@
 #      include <windows.h>
 #endif
 
+#ifdef __DJGPP__
+#      include <dpmi.h>
+#endif
+
 
 /// \brief      Get the amount of physical memory in bytes
 ///
@@ -76,6 +80,14 @@ physmem(void)
        meminfo.dwLength = sizeof(meminfo);
        if (GlobalMemoryStatusEx(&meminfo))
                ret = meminfo.ullTotalPhys;
+
+#elif defined(__DJGPP__)
+       __dpmi_free_mem_info meminfo;
+       if (__dpmi_get_free_memory_information(&meminfo) == 0
+                       && meminfo.total_number_of_physical_pages
+                               != (unsigned long)(-1))
+               ret = (uint64_t)(meminfo.total_number_of_physical_pages)
+                               * 4096;
 #endif
 
        return ret;

diff --git a/src/common/sysdefs.h b/src/common/sysdefs.h
index f55c236..5b8b9ce 100644 (file)
--- a/src/common/sysdefs.h
+++ b/src/common/sysdefs.h
@@ -154,6 +154,10 @@ typedef unsigned char _Bool;
 // Macros //
 ////////////
 
+#if defined(_WIN32) || defined(__MSDOS__) || defined(__OS2__)
+#      define DOSLIKE 1
+#endif
+
 #undef memzero
 #define memzero(s, n) memset(s, 0, n)
 

diff --git a/src/liblzma/check/crc32_x86.S b/src/liblzma/check/crc32_x86.S
index a9d07f0..ec28cf5 100644 (file)
--- a/src/liblzma/check/crc32_x86.S
+++ b/src/liblzma/check/crc32_x86.S
@@ -60,7 +60,7 @@ init_table(void)
  * Solaris assembler doesn't have .p2align, and Darwin uses .align
  * differently than GNU/Linux and Solaris.
  */
-#ifdef __MACH__
+#if defined(__MACH__) || defined(__MSDOS__)
 #      define ALIGN(pow2, abs) .align pow2
 #else
 #      define ALIGN(pow2, abs) .align abs
@@ -69,7 +69,7 @@ init_table(void)
        .text
        .globl  LZMA_CRC32
 
-#if !defined(__MACH__) && !defined(_WIN32)
+#if !defined(__MACH__) && !defined(_WIN32) && !defined(__MSDOS__)
        .type   LZMA_CRC32, @function
 #endif
 
@@ -275,7 +275,7 @@ LZMA_CRC32:
        .ascii " -export:lzma_crc32"
 #      endif
 
-#else
+#elif !defined(__MSDOS__)
        /* ELF */
        .size   LZMA_CRC32, .-LZMA_CRC32
 #endif

diff --git a/src/liblzma/check/crc64_x86.S b/src/liblzma/check/crc64_x86.S
index 031285e..3c25d42 100644 (file)
--- a/src/liblzma/check/crc64_x86.S
+++ b/src/liblzma/check/crc64_x86.S
@@ -53,7 +53,7 @@ init_table(void)
  * Solaris assembler doesn't have .p2align, and Darwin uses .align
  * differently than GNU/Linux and Solaris.
  */
-#ifdef __MACH__
+#if defined(__MACH__) || defined(__MSDOS__)
 #      define ALIGN(pow2, abs) .align pow2
 #else
 #      define ALIGN(pow2, abs) .align abs
@@ -62,7 +62,7 @@ init_table(void)
        .text
        .globl  LZMA_CRC64
 
-#if !defined(__MACH__) && !defined(_WIN32)
+#if !defined(__MACH__) && !defined(_WIN32) && !defined(__MSDOS__)
        .type   LZMA_CRC64, @function
 #endif
 
@@ -261,7 +261,7 @@ LZMA_CRC64:
        .ascii " -export:lzma_crc64"
 #      endif
 
-#else
+#elif !defined(__MSDOS__)
        /* ELF */
        .size   LZMA_CRC64, .-LZMA_CRC64
 #endif

diff --git a/src/xz/args.c b/src/xz/args.c
index 93cd220..31ff0e5 100644 (file)
--- a/src/xz/args.c
+++ b/src/xz/args.c
@@ -424,15 +424,12 @@ args_parse(args_info *args, int argc, char **argv)
 
        // Check how we were called.
        {
-               // Remove the leading path name, if any.
-#ifdef _WIN32
-               // Some systems support both / and \ to separate path
-               // components.
-               const char *name = argv[0] + strlen(argv[0]);
-               while (argv[0] < name && name[-1] != '/' && name[-1] != '\\')
-                       --name;
+#ifdef DOSLIKE
+               // We adjusted argv[0] in the beginning of main() so we don't
+               // need to do anything here.
+               const char *name = argv[0];
 #else
-               // POSIX
+               // Remove the leading path name, if any.
                const char *name = strrchr(argv[0], '/');
                if (name == NULL)
                        name = argv[0];

diff --git a/src/xz/io.c b/src/xz/io.c
index b8b8d8d..5ee84a9 100644 (file)
--- a/src/xz/io.c
+++ b/src/xz/io.c
@@ -21,6 +21,10 @@
 
 #include <fcntl.h>
 
+#ifdef DOSLIKE
+#      include <io.h>
+#endif
+
 #if defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT) || defined(HAVE_UTIMES)
 #      include <sys/time.h>
 #elif defined(HAVE_UTIME)
@@ -35,7 +39,7 @@
 #      define O_NOCTTY 0
 #endif
 
-#ifndef _WIN32
+#ifndef DOSLIKE
 #      include "open_stdxxx.h"
 static bool warn_fchown;
 #endif
@@ -44,7 +48,7 @@ static bool warn_fchown;
 extern void
 io_init(void)
 {
-#ifndef _WIN32
+#ifndef DOSLIKE
        // Make sure that stdin, stdout, and and stderr are connected to
        // a valid file descriptor. Exit immediatelly with exit code ERROR
        // if we cannot make the file descriptors valid. Maybe we should
@@ -56,6 +60,13 @@ io_init(void)
        warn_fchown = geteuid() == 0;
 #endif
 
+#ifdef __DJGPP__
+       // Avoid doing useless things when statting files.
+       // This isn't important but doesn't hurt.
+       _djstat_flags = _STAT_INODE | _STAT_EXEC_EXT
+                       | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
+#endif
+
        return;
 }
 
@@ -70,7 +81,7 @@ static void
 io_unlink(const char *name, const struct stat *known_st)
 {
        // On Windows, st_ino is meaningless, so don't bother testing it.
-#ifndef _WIN32
+#ifndef DOSLIKE
        struct stat new_st;
 
        if (lstat(name, &new_st)
@@ -98,7 +109,7 @@ static void
 io_copy_attrs(const file_pair *pair)
 {
        // Skip chown and chmod on Windows.
-#ifndef _WIN32
+#ifndef DOSLIKE
        // This function is more tricky than you may think at first.
        // Blindly copying permissions may permit users to access the
        // destination file who didn't have permission to access the
@@ -233,7 +244,7 @@ io_open_src(file_pair *pair)
        // There's nothing to open when reading from stdin.
        if (pair->src_name == stdin_filename) {
                pair->src_fd = STDIN_FILENO;
-#ifdef _WIN32
+#ifdef DOSLIKE
                setmode(STDIN_FILENO, O_BINARY);
 #endif
                return false;
@@ -246,7 +257,7 @@ io_open_src(file_pair *pair)
        // Flags for open()
        int flags = O_RDONLY | O_BINARY | O_NOCTTY;
 
-#ifndef _WIN32
+#ifndef DOSLIKE
        // If we accept only regular files, we need to be careful to avoid
        // problems with special files like devices and FIFOs. O_NONBLOCK
        // prevents blocking when opening such files. When we want to accept
@@ -259,7 +270,7 @@ io_open_src(file_pair *pair)
 #if defined(O_NOFOLLOW)
        if (reg_files_only)
                flags |= O_NOFOLLOW;
-#elif !defined(_WIN32)
+#elif !defined(DOSLIKE)
        // Some POSIX-like systems lack O_NOFOLLOW (it's not required
        // by POSIX). Check for symlinks with a separate lstat() on
        // these systems.
@@ -363,7 +374,7 @@ io_open_src(file_pair *pair)
                return true;
        }
 
-#ifndef _WIN32
+#ifndef DOSLIKE
        // Drop O_NONBLOCK, which is used only when we are accepting only
        // regular files. After the open() call, we want things to block
        // instead of giving EAGAIN.
@@ -398,7 +409,7 @@ io_open_src(file_pair *pair)
                }
 
                // These are meaningless on Windows.
-#ifndef _WIN32
+#ifndef DOSLIKE
                if (pair->src_st.st_mode & (S_ISUID | S_ISGID)) {
                        // gzip rejects setuid and setgid files even
                        // when --force was used. bzip2 doesn't check
@@ -450,7 +461,7 @@ static void
 io_close_src(file_pair *pair, bool success)
 {
        if (pair->src_fd != STDIN_FILENO && pair->src_fd != -1) {
-#ifdef _WIN32
+#ifdef DOSLIKE
                (void)close(pair->src_fd);
 #endif
 
@@ -459,12 +470,12 @@ io_close_src(file_pair *pair, bool success)
                // happens to get same inode number, which would make us
                // unlink() wrong file.
                //
-               // NOTE: Windows is an exception to this, because it doesn't
-               // allow unlinking files that are open. *sigh*
+               // NOTE: DOS-like systems are an exception to this, because
+               // they don't allow unlinking files that are open. *sigh*
                if (success && !opt_keep_original)
                        io_unlink(pair->src_name, &pair->src_st);
 
-#ifndef _WIN32
+#ifndef DOSLIKE
                (void)close(pair->src_fd);
 #endif
        }
@@ -480,7 +491,7 @@ io_open_dest(file_pair *pair)
                // We don't modify or free() this.
                pair->dest_name = (char *)"(stdout)";
                pair->dest_fd = STDOUT_FILENO;
-#ifdef _WIN32
+#ifdef DOSLIKE
                setmode(STDOUT_FILENO, O_BINARY);
 #endif
                return false;

diff --git a/src/xz/main.c b/src/xz/main.c
index 6c21cd2..8e707fb 100644 (file)
--- a/src/xz/main.c
+++ b/src/xz/main.c
@@ -164,6 +164,29 @@ main(int argc, char **argv)
        // that stdin, stdout, and stderr are something valid.
        io_init();
 
+#ifdef DOSLIKE
+       // Adjust argv[0] to make it look nicer in messages, and also to
+       // help the code in args.c.
+       {
+               // Strip the leading path.
+               char *p = argv[0] + strlen(argv[0]);
+               while (argv[0] < p && p[-1] != '/' && p[-1] != '\\')
+                       --p;
+
+               argv[0] = p;
+
+               // Strip the .exe suffix.
+               p = strrchr(p, '.');
+               if (p != NULL)
+                       *p = '\0';
+
+               // Make it lowercase.
+               for (p = argv[0]; *p != '\0'; ++p)
+                       if (*p >= 'A' && *p <= 'Z')
+                               *p = *p - 'A' + 'a';
+       }
+#endif
+
        // Set up the locale.
        setlocale(LC_ALL, "");
 

diff --git a/src/xz/message.c b/src/xz/message.c
index e342a3f..33eb0b3 100644 (file)
--- a/src/xz/message.c
+++ b/src/xz/message.c
@@ -207,6 +207,9 @@ message_init(const char *given_argv0)
 #ifdef _WIN32
        timer_queue = CreateTimerQueue();
 #else
+#      ifndef SA_RESTART
+#              define SA_RESTART 0
+#      endif
        // Establish the signal handler for SIGALRM. Since this signal
        // doesn't require any quick action, we set SA_RESTART.
        struct sigaction sa;

diff --git a/src/xz/suffix.c b/src/xz/suffix.c
index 0d46855..aff4d6d 100644 (file)
--- a/src/xz/suffix.c
+++ b/src/xz/suffix.c
@@ -19,6 +19,11 @@
 
 #include "private.h"
 
+// For case-insensitive filename suffix on case-insensitive systems
+#ifdef DOSLIKE
+#      define strcmp strcasecmp
+#endif
+
 
 static char *custom_suffix = NULL;
 

diff --git a/src/xzdec/xzdec.c b/src/xzdec/xzdec.c
index c17b579..44543f4 100644 (file)
--- a/src/xzdec/xzdec.c
+++ b/src/xzdec/xzdec.c
@@ -24,8 +24,9 @@
 #include <stdio.h>
 #include <unistd.h>
 
-#ifdef _WIN32
+#ifdef DOSLIKE
 #      include <fcntl.h>
+#      include <io.h>
 #endif
 
 #include "getopt.h"
@@ -408,7 +409,7 @@ main(int argc, char **argv)
        lzma_stream strm = LZMA_STREAM_INIT;
 
        // Some systems require setting stdin and stdout to binary mode.
-#ifdef _WIN32
+#ifdef DOSLIKE
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
 #endif