Read from /dev instead of lsblk
This commit is contained in:
Sasha Koshka
parent
d0dd41c080
commit
51278b9d8f
231
xmdev/src/main.c
231
xmdev/src/main.c
@ -12,6 +12,9 @@
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#include <stdio.h>
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#include <ctype.h>
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#include <limits.h>
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#include <dirent.h>
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#include <libgen.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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@ -45,6 +48,7 @@ typedef enum {
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typedef struct {
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Widget widget;
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DeviceKind kind;
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Bool orphaned;
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String name;
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String mountPoint;
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String label;
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@ -52,6 +56,7 @@ typedef struct {
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void loadIconPixmaps (void);
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void refreshDevices (void);
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void refreshDisks (void);
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Device * DeviceNew (String name, DeviceKind kind);
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void DeviceDelete (ConstString name);
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void DeviceFree (Device *this);
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@ -101,145 +106,116 @@ void loadIconPixmaps (void) {
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dev(TTY, tty);
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}
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Bool markDevice (XmdStringMap *map, ConstString key, void *value, void *data) {
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(void)(map);
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(void)(key);
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(void)(data);
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Device *this = value;
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this->orphaned = True;
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return True;
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}
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Bool transferDevice (XmdStringMap *map, ConstString key, void *value, void *data) {
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(void)(map);
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(void)(key);
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(void)(data);
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Device *this = value;
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if (this->orphaned) {
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DeviceFree(this);
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} else {
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XmdStringMapSet(devices, key, value);
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}
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return True;
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}
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void refreshDevices (void) {
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XtUnmanageChild(container);
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pid_t child = 0;
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FILE *stream = XmdVaPipedExecPath (
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"lsblk", &child, "r",
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"", "-P", "-o", "NAME,TYPE,MOUNTPOINTS,LABEL", NULL);
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if (stream == NULL) {
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/* TODO error */
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return;
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}
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Device *device = NULL;
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while (readBlockDevice(stream, &device) != EOF) {
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/* do something with device? */
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}
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fclose(stream);
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waitpid(child, NULL, 0);
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/* pre-mark all devices as orphaned */
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XmdStringMapIterate(devices, markDevice, NULL);
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/* refresh devices by category */
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refreshDisks();
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/* create a new map, only moving over extant devices */
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XmdStringMap *oldMap = devices;
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devices = XmdStringMapNew();
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XmdStringMapIterate(oldMap, transferDevice, NULL);
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XmdStringMapFree(oldMap);
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XtManageChild(container);
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}
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int readBlockDevice (FILE *stream, Device **device) {
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DeviceKind kind = DeviceKindGeneric;
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String name = NULL;
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String mountPoint = NULL;
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String label = NULL;
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int ch = 0;
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while (1) {
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String key = NULL;
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String value = NULL;
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ch = readLsblkPair(stream, &key, &value);
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if (strcmp(key, "NAME") == 0) {
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XtFree(name);
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name = value;
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} else if (strcmp(key, "TYPE") == 0) {
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if (strcmp(value, "disk") == 0) {
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kind = DeviceKindDisk;
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} else if (strcmp(value, "rom") == 0) {
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kind = DeviceKindRom;
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} else if (strcmp(value, "part") == 0) {
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kind = DeviceKindFilesystem;
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}
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XtFree(value);
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} else if (strcmp(key, "MOUNTPOINTS") == 0) {
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XtFree(mountPoint);
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mountPoint = value;
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} else if (strcmp(key, "LABEL") == 0) {
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XtFree(label);
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label = value;
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} else {
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XtFree(value);
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}
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XtFree(key);
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while ((ch = fgetc(stream)) == ' ');
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if (ch == EOF || ch == '\n') break;
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ungetc(ch, stream);
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}
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if (name != NULL) {
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*device = XmdStringMapGet(devices, name);
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if (*device == NULL) {
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*device = DeviceNew(name, kind);
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} else {
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DeviceSetKind(*device, kind);
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}
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DeviceSetMountPoint(*device, mountPoint);
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DeviceSetLabel(*device, label);
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}
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XtFree(name);
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XtFree(mountPoint);
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XtFree(label);
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return ch;
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String diskName (ConstString directory, ConstString name) {
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char fullpath[PATH_MAX];
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snprintf(fullpath, XtNumber(fullpath), "%s/%s", directory, name);
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char resolved[PATH_MAX];
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return XtNewString(basename(realpath(fullpath, resolved)));
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}
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int readLsblkPair (FILE *stream, String *key, String *value) {
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int ch = 0;
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int escapeCh = 0;
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char null = 0;
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void refreshDisks (void) {
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/* get disks */
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ConstString disksById = "/dev/disk/by-id";
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ConstString disksByLabel = "/dev/disk/by-label";
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ConstString disksByPartuuid = "/dev/disk/by-partuuid";
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*key = NULL;
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*value = NULL;
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XmdBuffer *keyBuffer = XmdBufferNew(char);
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while (isalpha(ch = fgetc(stream))) XmdBufferPush(keyBuffer, &ch);
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XmdBufferPush(keyBuffer, &null);
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*key = XmdBufferBreak(keyBuffer);
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fgetc(stream); /* skip = */
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XmdBuffer *valueBuffer = XmdBufferNew(char);
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enum {
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stateGetString,
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stateGetEscape,
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} state = stateGetString;
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while (1) {
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ch = fgetc(stream);
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if (ch == EOF) goto end;
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switch (state) {
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case stateGetString:
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switch (ch) {
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case '"': goto end;
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case '\\': state = stateGetEscape; break;
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default: XmdBufferPush(valueBuffer, &ch); break;
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}
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break;
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case stateGetEscape:
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ch = fgetc(stream); /* skip x */
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int digit = tolower(ch);
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if (
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(digit < '0' || digit > '9') &&
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(digit < 'a' || digit > 'f')
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) {
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ungetc(ch, stream);
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XmdBufferPush(valueBuffer, &escapeCh);
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state = stateGetString;
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break;
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}
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digit -= '0';
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if (digit > 9) digit -= 'a' - '9' - 1;
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escapeCh *= 16;
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escapeCh += digit;
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break;
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struct dirent **entries = NULL;
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int entriesCount = scandir(disksById, &entries, NULL, alphasort);
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if (entriesCount < 0) {
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/* TODO error message */
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return;
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}
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for (int index = 0; index < entriesCount; index ++) {
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struct dirent *entry = entries[index];
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if (entry->d_name[0] == '.') {
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XtFree((char *)(entry));
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continue;
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}
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String deviceName = diskName(disksById, entry->d_name);
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XtFree((char *)(entry));
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Device *device = XmdStringMapGet(devices, deviceName);
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if (device == NULL) {
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device = DeviceNew(deviceName, DeviceKindDisk);
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} else {
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device->orphaned = False;
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DeviceSetKind(device, DeviceKindDisk);
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}
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XtFree(deviceName);
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}
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end:
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XmdBufferPush(valueBuffer, &null);
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*value = XmdBufferBreak(valueBuffer);
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if (strlen(*value) == 0) {
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XtFree(*value);
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*value = NULL;
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XtFree((char *)(entries));
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/* determine disk types */
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DIR *dir = opendir(disksByPartuuid);
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if (dir == NULL) {
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/* TODO error message */
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return;
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}
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return ch;
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struct dirent *entry;
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while ((entry = readdir(dir)) != NULL) {
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if (entry->d_name[0] == '.') continue;
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String deviceName = diskName(disksByPartuuid, entry->d_name);
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Device *device = XmdStringMapGet(devices, deviceName);
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if (device != NULL) DeviceSetKind(device, DeviceKindFilesystem);
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XtFree(deviceName);
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}
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closedir(dir);
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/* determine partition labels */
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dir = opendir(disksByLabel);
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if (dir == NULL) {
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/* TODO error message */
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return;
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}
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while ((entry = readdir(dir)) != NULL) {
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if (entry->d_name[0] == '.') continue;
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String deviceName = diskName(disksByLabel, entry->d_name);
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Device *device = XmdStringMapGet(devices, deviceName);
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if (device != NULL) DeviceSetLabel(device, entry->d_name);
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XtFree(deviceName);
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}
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closedir(dir);
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}
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Device *DeviceNew (String name, DeviceKind kind) {
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@ -247,10 +223,11 @@ Device *DeviceNew (String name, DeviceKind kind) {
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this->mountPoint = NULL;
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this->label = NULL;
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this->name = XtNewString(name);
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this->orphaned = False;
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XmString string = XmStringCreateLocalized(name);
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this->widget = XtVaCreateManagedWidget (
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"device", xmIconGadgetClass, container,
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XmNalignment, XmALIGNMENT_CENTER,
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XmNalignment, XmALIGNMENT_BEGINNING,
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XmNlabelString, string,
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NULL);
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XmStringFree(string);
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