OS_Develop/FreeDOS
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Check if source and destination are identical before copying.

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@607 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2003-06-16 13:33:40 +00:00
parent 1b2a421f44
commit 2a83b111c4
1 changed files with 35 additions and 5 deletions
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40
sys/sys.c
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@ -35,7 +35,7 @@
#define DEBUG
/* #define DDEBUG */
#define SYS_VERSION "v2.5"
#define SYS_VERSION "v2.6"
#include <stdlib.h>
#include <dos.h>
@ -106,7 +106,9 @@ int stat(const char *file_name, struct stat *buf)
return _dos_findfirst(file_name, _A_NORMAL | _A_HIDDEN | _A_SYSTEM, &find_tbuf);
}
#endif
/* WATCOM's getenv is case-insensitive which wastes a lot of space
for our purposes. So here's a simple case-sensitive one */
char *getenv(const char *name)
{
char **envp, *ep;
@ -127,6 +129,7 @@ char *getenv(const char *name)
}
return NULL;
}
#endif
BYTE pgm[] = "SYS";
@ -314,7 +317,7 @@ int main(int argc, char **argv)
}
printf("\nCopying KERNEL.SYS...\n");
if (!copy(drive, srcPath, rootPath, "kernel.sys"))
if (!copy(drive, srcPath, rootPath, "KERNEL.SYS"))
{
printf("\n%s: cannot copy \"KERNEL.SYS\"\n", pgm);
exit(1);
@ -423,6 +426,11 @@ void reset_drive(int DosDrive);
parm [dx] \
modify [ax bx];
void truename(char far *dest, const char *src);
#pragma aux truename = \
"mov ah,0x60" \
"int 0x21" \
parm [es di] [si];
#else
#ifndef __TURBOC__
@ -473,6 +481,19 @@ void reset_drive(int DosDrive)
intdos(&regs, &regs);
} /* reset_drive */
void truename(char *dest, const char *src)
{
union REGS regs;
struct SREGS sregs;
regs.h.ah = 0x60;
sregs.es = FP_SEG(dest);
regs.x.di = FP_OFF(dest);
sregs.ds = FP_SEG(src);
regs.x.si = FP_OFF(src);
intdosx(&regs, &regs, &sregs);
} /* reset_drive */
#endif
int MyAbsReadWrite(int DosDrive, int count, ULONG sector, void *buffer,
@ -807,13 +828,12 @@ BYTE copybuffer[COPY_SIZE];
BOOL copy(COUNT drive, BYTE * srcPath, BYTE * rootPath, BYTE * file)
{
BYTE dest[SYS_MAXPATH], source[SYS_MAXPATH];
static BYTE dest[SYS_MAXPATH], source[SYS_MAXPATH];
unsigned ret;
int fdin, fdout;
ULONG copied = 0;
struct stat fstatbuf;
sprintf(dest, "%c:\\%s", 'A' + drive, file);
strcpy(source, srcPath);
if (rootPath != NULL) /* trick for comspec */
strcat(source, file);
@ -836,6 +856,16 @@ BOOL copy(COUNT drive, BYTE * srcPath, BYTE * rootPath, BYTE * file)
return FALSE;
}
truename(dest, source);
strcpy(source, dest);
sprintf(dest, "%c:\\%s", 'A' + drive, file);
if (strcmp(source, dest) == 0)
{
printf("%s: source and destination are identical: skipping \"%s\"\n",
pgm, source);
return TRUE;
}
if ((fdin = open(source, O_RDONLY | O_BINARY)) < 0)
{
printf("%s: failed to open \"%s\"\n", pgm, source);