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Perform better fixups of NT paths in execve()
This change ensures we do a better job translating /c/foo.bar paths into c:/foo.bar paths on Windows when generating the CreateProcess() cmd line thus fixing a regression that happened in the last two months when using the help() feature of Actually Portable Python in the CMD.EXE shell.
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cfb5d3e406
commit
701564de19
4 changed files with 50 additions and 10 deletions
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@ -41,6 +41,10 @@ static bool NeedsQuotes(const char *s) {
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return false;
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}
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static inline int IsAlpha(int c) {
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return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
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}
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/**
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* Converts System V argv to Windows-style command line.
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*
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@ -86,8 +90,27 @@ textwindows int mkntcmdline(char16_t cmdline[ARG_MAX / 2], const char *prog,
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}
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}
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if (!x) break;
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if (!i && x == '/') {
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x = '\\';
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if (x == '/' || x == '\\') {
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if (!i) {
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// turn / into \ for first arg
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x = '\\';
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// turn \c\... into c:\ for first arg
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if (k == 2 && IsAlpha(cmdline[1]) && cmdline[0] == '\\') {
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cmdline[0] = cmdline[1];
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cmdline[1] = ':';
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}
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} else {
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// turn stuff like `less /c/...`
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// into `less c:/...`
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// turn stuff like `more <\\\"/c/...\\\"`
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// into `more <\\\"c:/...\\\"`
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if (k > 3 && IsAlpha(cmdline[k - 1]) &&
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(cmdline[k - 2] == '/' || cmdline[k - 2] == '\\') &&
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(cmdline[k - 3] == '"' || cmdline[k - 3] == ' ')) {
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cmdline[k - 2] = cmdline[k - 1];
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cmdline[k - 1] = ':';
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}
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}
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}
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if (x == '\\') {
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++slashes;
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@ -72,12 +72,14 @@ static textwindows void FixPath(char *path) {
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// turn \c\... into c:\...
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p = path;
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if (p[0] == '/' && IsAlpha(p[1]) && p[2] == '/') {
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if ((p[0] == '/' | p[0] == '\\') && IsAlpha(p[1]) &&
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(p[2] == '/' || p[2] == '\\')) {
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p[0] = p[1];
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p[1] = ':';
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}
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for (; *p; ++p) {
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if (p[0] == ';' && p[1] == '/' && IsAlpha(p[2]) && p[3] == '/') {
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if (p[0] == ';' && (p[1] == '/' || p[1] == '\\') && IsAlpha(p[2]) &&
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(p[3] == '/' || p[3] == '\\')) {
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p[1] = p[2];
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p[2] = ':';
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}
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@ -79,8 +79,10 @@ const char *DescribeStat(int rc, const struct stat *st) {
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i += ksnprintf(buf + i, n - i, ", .st_%s=%'lu", "blksize", st->st_blksize);
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}
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buf[i++] = '}';
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buf[i] = 0;
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if (n - i >= 2) {
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buf[i + 0] = '}';
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buf[i + 1] = 0;
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}
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return buf;
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}
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@ -78,16 +78,29 @@ TEST(mkntcmdline, testUnicode) {
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cmdline);
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}
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TEST(mkntcmdline, fix) {
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TEST(mkntcmdline, fixAsBestAsWeCanForNow1) {
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char *argv1[] = {
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"C:/WINDOWS/system32/cmd.exe",
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"/C/WINDOWS/system32/cmd.exe",
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"/C",
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"more < \"C:\\Users\\jart\\AppData\\Local\\Temp\\tmplquaa_d6\"",
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"more < \"/C/Users/jart/AppData/Local/Temp/tmplquaa_d6\"",
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NULL,
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};
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EXPECT_NE(-1, mkntcmdline(cmdline, argv1[0], argv1));
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EXPECT_STREQ(u"C:\\WINDOWS\\system32\\cmd.exe /C \"more < "
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u"\\\"C:\\Users\\jart\\AppData\\Local\\Temp\\tmplquaa_d6\\\"\"",
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u"\\\"C:/Users/jart/AppData/Local/Temp/tmplquaa_d6\\\"\"",
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cmdline);
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}
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TEST(mkntcmdline, fixAsBestAsWeCanForNow2) {
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char *argv1[] = {
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"/C/WINDOWS/system32/cmd.exe",
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"/C",
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"less /C/Users/jart/AppData/Local/Temp/tmplquaa_d6",
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NULL,
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};
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EXPECT_NE(-1, mkntcmdline(cmdline, argv1[0], argv1));
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EXPECT_STREQ(u"C:\\WINDOWS\\system32\\cmd.exe /C \"less "
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u"C:/Users/jart/AppData/Local/Temp/tmplquaa_d6\"",
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cmdline);
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}
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