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authorLukas Larsson <[email protected]>2014-04-08 17:46:52 +0200
committerLukas Larsson <[email protected]>2014-04-10 09:42:34 +0200
commit9633e0ebc304cb003b3ef06433e6b7ccdc9e983a (patch)
tree3e751d6bae3ea3bdb1b1841a60c4dabf02a10854 /erts/emulator/sys/win32/sys.c
parent07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff)
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win32: Fix quoting of paths
Diffstat (limited to 'erts/emulator/sys/win32/sys.c')
-rwxr-xr-xerts/emulator/sys/win32/sys.c114
1 files changed, 54 insertions, 60 deletions
diff --git a/erts/emulator/sys/win32/sys.c b/erts/emulator/sys/win32/sys.c
index 0ded6b274e..ae44c8424f 100755
--- a/erts/emulator/sys/win32/sys.c
+++ b/erts/emulator/sys/win32/sys.c
@@ -1392,39 +1392,46 @@ int parse_command(wchar_t* cmd){
return i;
}
-static BOOL need_quotes(wchar_t *str)
-{
- int in_quote = 0;
- int backslashed = 0;
- int naked_space = 0;
- while (*str != L'\0') {
- switch (*str) {
- case L'\\' :
- backslashed = !backslashed;
- break;
- case L'"':
- if (backslashed) {
- backslashed=0;
- } else {
- in_quote = !in_quote;
- }
- break;
- case L' ':
- backslashed = 0;
- if (!(backslashed || in_quote)) {
- naked_space++;
- }
- break;
- default:
- backslashed = 0;
+/*
+ * Translating of command line arguments to correct format. In the examples
+ * below the '' are not part of the actual string.
+ * 'io:format("hello").' -> 'io:format(\"hello\").'
+ * 'io:format("is anybody in there?").' -> '"io:format(\"is anybody in there?\")."'
+ * 'Just nod if you can hear me.' -> '"Just nod if you can hear me."'
+ * 'Is there ""anyone at home?' -> '"Is there \"\"anyone at home?"'
+ * 'Relax."' -> 'Relax.\"'
+ *
+ * If new == NULL we just calculate the length.
+ *
+ * The reason for having to quote all of the is becasue CreateProcessW removes
+ * one level of escaping since it takes a single long command line rather
+ * than the argument chunks that unix uses.
+ */
+static int escape_and_quote(wchar_t *str, wchar_t *new, BOOL *quoted) {
+ int i, j = 0;
+ if (new == NULL)
+ *quoted = FALSE;
+ else if (*quoted)
+ new[j++] = L'"';
+ for ( i = 0; str[i] != L'\0'; i++,j++) {
+ if (str[i] == L' ' && new == NULL && *quoted == FALSE) {
+ *quoted = TRUE;
+ j++;
+ }
+ /* check if we have to escape quotes */
+ if (str[i] == L'"') {
+ if (new) new[j] = L'\\';
+ j++;
}
- ++str;
+ if (new) new[j] = str[i];
}
- return (naked_space > 0);
+ if (*quoted) {
+ if (new) new[j] = L'"';
+ j++;
+ }
+ return j;
}
-
-
/*
*----------------------------------------------------------------------
@@ -1585,31 +1592,24 @@ create_child_process
wcscpy(appname, execPath);
}
if (argv == NULL) {
- BOOL orig_need_q = need_quotes(execPath);
+ BOOL orig_need_q;
wchar_t *ptr;
- int ocl = wcslen(execPath);
+ int ocl = escape_and_quote(execPath, NULL, &orig_need_q);
if (run_cmd) {
newcmdline = (wchar_t *) erts_alloc(ERTS_ALC_T_TMP,
- (ocl + ((orig_need_q) ? 3 : 1)
- + 11)*sizeof(wchar_t));
+ (ocl + 1 + 11)*sizeof(wchar_t));
memcpy(newcmdline,L"cmd.exe /c ",11*sizeof(wchar_t));
ptr = newcmdline + 11;
} else {
newcmdline = (wchar_t *) erts_alloc(ERTS_ALC_T_TMP,
- (ocl + ((orig_need_q) ? 3 : 1))*sizeof(wchar_t));
+ (ocl + 1)*sizeof(wchar_t));
ptr = (wchar_t *) newcmdline;
}
- if (orig_need_q) {
- *ptr++ = L'"';
- }
- memcpy(ptr,execPath,ocl*sizeof(wchar_t));
- ptr += ocl;
- if (orig_need_q) {
- *ptr++ = L'"';
- }
- *ptr = L'\0';
+ ptr += escape_and_quote(execPath, ptr, &orig_need_q);
+ ptr[0] = L'\0';
} else {
- int sum = 1; /* '\0' */
+ int sum = 0;
+ BOOL *qte = NULL;
wchar_t **ar = argv;
wchar_t *n;
wchar_t *save_arg0 = NULL;
@@ -1620,11 +1620,13 @@ create_child_process
if (run_cmd) {
sum += 11; /* cmd.exe /c */
}
+
+ while (*ar != NULL) ar++;
+ qte = erts_alloc(ERTS_ALC_T_TMP, (ar - argv)*sizeof(BOOL));
+
+ ar = argv;
while (*ar != NULL) {
- sum += wcslen(*ar);
- if (need_quotes(*ar)) {
- sum += 2; /* quotes */
- }
+ sum += escape_and_quote(*ar,NULL,qte+(ar - argv));
sum++; /* space */
++ar;
}
@@ -1636,26 +1638,18 @@ create_child_process
n += 11;
}
while (*ar != NULL) {
- int q = need_quotes(*ar);
- sum = wcslen(*ar);
- if (q) {
- *n++ = L'"';
- }
- memcpy(n,*ar,sum*sizeof(wchar_t));
- n += sum;
- if (q) {
- *n++ = L'"';
- }
+ n += escape_and_quote(*ar,n,qte+(ar - argv));
*n++ = L' ';
++ar;
}
- *(n-1) = L'\0';
+ *(n-1) = L'\0'; /* overwrite last space with '\0' */
if (save_arg0 != NULL) {
argv[0] = save_arg0;
}
+ erts_free(ERTS_ALC_T_TMP, qte);
}
- DEBUGF(("Creating child process: %s, createFlags = %d\n", newcmdline, createFlags));
+ DEBUGF((stderr,"Creating child process: %S, createFlags = %d\n", newcmdline, createFlags));
ok = CreateProcessW((wchar_t *) appname,
(wchar_t *) newcmdline,
NULL,