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[common] linux: print reason for failure to open the shm file/device

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This commit is contained in:
Geoffrey McRae 2020-10-12 17:48:31 +11:00
parent 90d1ed64e4
commit 6650e58a4a
1 changed files with 7 additions and 2 deletions
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7
common/src/platform/linux/ivshmem.c
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@ -27,6 +27,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include <sys/mman.h> #include <sys/mman.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <errno.h>
#include "common/debug.h" #include "common/debug.h"
#include "common/option.h" #include "common/option.h"
@ -196,6 +197,7 @@ bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDevice)
if (len <= 0) if (len <= 0)
{ {
DEBUG_ERROR("Failed to read the device size"); DEBUG_ERROR("Failed to read the device size");
DEBUG_ERROR("%s", strerror(errno));
close(fd); close(fd);
return false; return false;
} }
@ -207,7 +209,7 @@ bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDevice)
if (devFD < 0) if (devFD < 0)
{ {
DEBUG_ERROR("Failed to open: %s", shmDevice); DEBUG_ERROR("Failed to open: %s", shmDevice);
DEBUG_ERROR("Do you have permission to access the device?"); DEBUG_ERROR("%s", strerror(errno));
return false; return false;
} }
} }
@ -217,6 +219,7 @@ bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDevice)
if (stat(shmDevice, &st) != 0) if (stat(shmDevice, &st) != 0)
{ {
DEBUG_ERROR("Failed to stat: %s", shmDevice); DEBUG_ERROR("Failed to stat: %s", shmDevice);
DEBUG_ERROR("%s", strerror(errno));
return false; return false;
} }
@ -225,6 +228,7 @@ bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDevice)
if (devFD < 0) if (devFD < 0)
{ {
DEBUG_ERROR("Failed to open: %s", shmDevice); DEBUG_ERROR("Failed to open: %s", shmDevice);
DEBUG_ERROR("%s", strerror(errno));
return false; return false;
} }
} }
@ -233,6 +237,7 @@ bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDevice)
if (map == MAP_FAILED) if (map == MAP_FAILED)
{ {
DEBUG_ERROR("Failed to map the shared memory device: %s", shmDevice); DEBUG_ERROR("Failed to map the shared memory device: %s", shmDevice);
DEBUG_ERROR("%s", strerror(errno));
return false; return false;
} }