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Added check for success of file operations.

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Note: As the drive 2 disk image filename is optional all access to drive 2 should trigger an I/O error on the client side.
This commit is contained in:
Oliver Schmidt 2018-02-04 20:17:23 +01:00
parent 9fd4088746
commit 413bfd6b96
1 changed files with 37 additions and 7 deletions
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44
server/main.cpp
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@ -102,14 +102,33 @@ int main(int argc, char *argv[])
return EXIT_FAILURE; return EXIT_FAILURE;
} }
char * apFileData[2]; char *apFileData[2] = {0, 0};
for (int iDrive=0; iDrive<2; iDrive++) for (int iDrive = 0; iDrive < 2; iDrive++)
{ {
if (apFilename[iDrive] == 0)
continue;
int fd = open(apFilename[iDrive], O_RDWR, S_IWRITE | S_IREAD); int fd = open(apFilename[iDrive], O_RDWR, S_IWRITE | S_IREAD);
if (fd == -1)
{
printf("Err: %s - %s\n", apFilename[iDrive], strerror(errno));
return EXIT_FAILURE;
}
struct stat stats; struct stat stats;
fstat(fd, &stats); if (fstat(fd, &stats) == -1)
{
printf("Err: %s - %s\n", apFilename[iDrive], strerror(errno));
return EXIT_FAILURE;
}
unsigned int uFilesize = (unsigned int)stats.st_size; unsigned int uFilesize = (unsigned int)stats.st_size;
apFileData[iDrive] = (char*) mmap(0, uFilesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
apFileData[iDrive] = (char*)mmap(0, uFilesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (apFileData[iDrive] == MAP_FAILED)
{
printf("Err: %s - %s\n", apFilename[iDrive], strerror(errno));
return EXIT_FAILURE;
}
} }
enum sp_return eResult; enum sp_return eResult;
@ -252,7 +271,18 @@ int main(int argc, char *argv[])
// If 4x bytes were read and the checksum passed, process request // If 4x bytes were read and the checksum passed, process request
int iBlock = auReadBuf[1] | (auReadBuf[2] << 8); int iBlock = auReadBuf[1] | (auReadBuf[2] << 8);
char *pDriveData = apFileData[(auReadBuf[0] >> 2) & 1]; int iDrive = (auReadBuf[0] >> 2) & 1;
char *pDriveData = apFileData[iDrive];
if (pDriveData == 0)
{
if (bLog)
{
printf("%d\tN\n", iDrive);
fflush(stdout);
}
// TODO: Make this an I/O error on the client side
continue;
}
pDriveData += iBlock << 9; pDriveData += iBlock << 9;
// Read block // Read block
@ -281,7 +311,7 @@ int main(int argc, char *argv[])
if (bLog) if (bLog)
{ {
printf("%d\tR %5d\r", (auReadBuf[0] >> 2) & 1, iBlock); printf("%d\tR %5d\r", iDrive, iBlock);
fflush(stdout); fflush(stdout);
} }
} }
@ -308,7 +338,7 @@ int main(int argc, char *argv[])
if (bLog) if (bLog)
{ {
printf("%d\t\t\t\tW %5d\r", (auReadBuf[0] >> 2) & 1, iBlock); printf("%d\t\t\t\tW %5d\r", iDrive, iBlock);
fflush(stdout); fflush(stdout);
} }
} }