add some comments regarding share

PerditionC · PerditionC · commit 42a006b9641f · 2025-03-28T10:24:19.000-04:00
diff --git a/kernel/dosfns.c b/kernel/dosfns.c
@@ -305,6 +305,7 @@ long DosRWSft(int sft_idx, size_t n, void FAR * bp, int mode)
   /* /// Added for SHARE - Ron Cemer */
   if (IsShareInstalled(FALSE) && (s->sft_shroff >= 0))
   {
+    /* sft_shroff is file_table index in share */
     int rc = share_access_check(cu_psp, s->sft_shroff, s->sft_posit,
                                  (unsigned long)n, 1);
     if (rc != SUCCESS)
@@ -611,7 +612,8 @@ long DosOpenSft(char FAR * fname, unsigned flags, unsigned attrib)
   if (result < 0)
   {
 /* /// Added for SHARE *** CURLY BRACES ADDED ALSO!!! ***.  - Ron Cemer */
-    if (IsShareInstalled(TRUE))
+    /* if we allocated a share slot above, but open failed, free slot */
+    if (sftp->sft_shroff >= 0)  /* SHARE installed status can't change since check above */
     {
       share_close_file(sftp->sft_shroff);
       sftp->sft_shroff = -1;

Original file line number	Diff line number	Diff line change
`@@ -305,6 +305,7 @@ long DosRWSft(int sft_idx, size_t n, void FAR * bp, int mode)`
`305`	`305`	`/* /// Added for SHARE - Ron Cemer */`
`306`	`306`	`if (IsShareInstalled(FALSE) && (s->sft_shroff >= 0))`
`307`	`307`	`{`
	`308`	`+ /* sft_shroff is file_table index in share */`
`308`	`309`	`int rc = share_access_check(cu_psp, s->sft_shroff, s->sft_posit,`
`309`	`310`	`(unsigned long)n, 1);`
`310`	`311`	`if (rc != SUCCESS)`
`@@ -611,7 +612,8 @@ long DosOpenSft(char FAR * fname, unsigned flags, unsigned attrib)`
`611`	`612`	`if (result < 0)`
`612`	`613`	`{`
`613`	`614`	`/* /// Added for SHARE * CURLY BRACES ADDED ALSO!!! . - Ron Cemer /`
`614`		`- if (IsShareInstalled(TRUE))`
	`615`	`+ /* if we allocated a share slot above, but open failed, free slot */`
	`616`	`+ if (sftp->sft_shroff >= 0) /* SHARE installed status can't change since check above */`
`615`	`617`	`{`
`616`	`618`	`share_close_file(sftp->sft_shroff);`
`617`	`619`	`sftp->sft_shroff = -1;`