dockapps/wmhdplop/devnames.c

266 lines
7.4 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <linux/major.h>
#include <ctype.h>
#include "global.h"
#include "devnames.h"
static DiskList *dlist = NULL;
const char *stripdev(const char *s) {
if (strncmp(s,"/dev",4) == 0) s+= 4;
if (s[0] == '/') s++;
return s;
}
DiskList *find_dev(unsigned major, unsigned minor) {
DiskList *dl;
for (dl = dlist; dl; dl = dl->next) {
if (dl->major == major && dl->minor == minor) return dl;
}
return NULL;
}
DiskList *find_id(int hd_id, int part_id) {
DiskList *dl;
for (dl = dlist; dl; dl = dl->next) {
if (((dl->hd_id == hd_id) || hd_id == -1) &&
((dl->part_id == part_id) || part_id == -1)) return dl;
}
return NULL;
}
/*
DiskList *find_dev_by_name(const char *name) {
DiskList *dl;
const char *sname = stripdev(name);
for (dl = dlist; dl; dl = dl->next) {
if (strcmp(sname, dl->name)==0) return dl;
}
return NULL;
}*/
DiskList *next_hd_in_list(DiskList *prev) {
DiskList *dl = (prev ? prev->next : dlist);
while (dl && IS_PARTITION(dl)) dl = dl->next;
return dl;
}
DiskList *first_hd_in_list() {
return next_hd_in_list(NULL);
}
DiskList *first_dev_in_list() {
return dlist;
}
int nb_hd_in_list() {
int i=0;
DiskList *dl;
for (dl = first_hd_in_list(); dl; dl = next_hd_in_list(dl)) ++i;
return i;
}
int nb_dev_in_list() {
int i=0;
DiskList *dl;
for (dl = dlist; dl; dl = dl->next) ++i;
return i;
}
/*int is_partition_name(const char *name) {
int l = strlen(name);
if (l && name[l-1] >= '0' && name[l-1] <= '9') return 1;
return 0;
}
*/
static const char *to_num_(unsigned minor) {
static char id[16];
if (minor == 0) return "";
else snprintf(id,16,"%d",minor);
return id;
}
int device_info(unsigned major, unsigned minor, char *name, int *hd_id, int *part_id) {
switch(major) {
#ifdef SCSI_DISK0_MAJOR
case (SCSI_DISK0_MAJOR):
#else
case (SCSI_DISK_MAJOR):
#endif
if (name) sprintf(name, "sd%c%s", "abcdefghijklmnop"[(minor)/16], to_num_(minor%16));
if (hd_id) *hd_id = (minor)/16;
if (part_id) *part_id = minor%16;
return 1;
case IDE0_MAJOR:
if (name) sprintf(name, "hd%c%s", "ab"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 100 + (minor)/64;
if (part_id) *part_id = minor%64;
return 2;
case IDE1_MAJOR:
if (name) sprintf(name, "hd%c%s", "cd"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 200 + (minor)/64;
if (part_id) *part_id = minor%64;
return 3;
#ifdef IDE2_MAJOR
case IDE2_MAJOR:
if (name) sprintf(name, "hd%c%s", "ef"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 300 + (minor)/64;
if (part_id) *part_id = minor%64;
return 4;
#endif
#ifdef IDE3_MAJOR
case IDE3_MAJOR:
if (name) sprintf(name, "hd%c%s", "gh"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 400 + (minor)/64;
if (part_id) *part_id = minor%64;
return 5;
#endif
#ifdef IDE4_MAJOR
case IDE4_MAJOR:
if (name) sprintf(name, "hd%c%s", "ij"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 400 + (minor)/64;
if (part_id) *part_id = minor%64;
return 6;
#endif
#ifdef IDE5_MAJOR
case IDE5_MAJOR:
if (name) sprintf(name, "hd%c%s", "kl"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 400 + (minor)/64;
if (part_id) *part_id = minor%64;
return 7;
#endif
#ifdef IDE6_MAJOR
case IDE6_MAJOR:
if (name) sprintf(name, "hd%c%s", "mn"[(minor)/64], to_num_(minor%64));
if (hd_id) *hd_id = 400 + (minor)/64;
if (part_id) *part_id = minor%64;
return 8;
#endif
#ifdef MD_MAJOR
case (MD_MAJOR):
if (name) sprintf(name, "md%s", to_num_(minor));
if (hd_id) *hd_id = 400 + minor;
if (part_id) *part_id = 0;
return 9;
#endif
}
if (name) *name = 0;
if (hd_id) *hd_id = -1;
if (part_id) *part_id = -1;
return 0;
}
int short_name_for_device(unsigned major, unsigned minor, char *name) {
return device_info(major,minor,name,NULL,NULL);
}
int is_partition(unsigned major, unsigned minor) {
int part_id;
if (!device_info(major,minor,NULL,NULL,&part_id)) return 0;
return (part_id != 0);
}
int device_id_from_name(const char *devname__, unsigned *pmajor, unsigned *pminor) {
if (strlen(devname__)>=512) return -1;
char *devname_, devname[512];
devname_ = str_substitute(devname__, "/dev/mapper", "/dev");
struct stat stat_buf;
BLAHBLAH(1,printf("looking for %s in /dev..\n", devname_));
if (devname_[0] != '/') snprintf(devname,512,"/dev/%s", devname_);
else snprintf(devname,512,"%s",devname_);
free(devname_); devname_ = 0;
if (lstat(devname,&stat_buf)) { BLAHBLAH(1,perror(devname)); return -1; }
if (S_ISLNK(stat_buf.st_mode)) {
char lname[512];
int n = readlink(devname, lname, 511); lname[n] = 0;
snprintf(devname,512,"/dev/%s",stripdev(lname));
if (stat(devname,&stat_buf)) { BLAHBLAH(1,perror(devname)); return -1; }
}
if (!S_ISBLK(stat_buf.st_mode)) {
fprintf(stderr, "%s is not a block device..\n", devname);
return -2;
}
*pmajor = major(stat_buf.st_rdev);
*pminor = minor(stat_buf.st_rdev);
return 0;
}
/* add a hard-drive if it is a regular ide/scsi/md disk/partition, or return NULL */
static DiskList *create_device(unsigned major, unsigned minor, const char *mtab_name) {
DiskList *dl;
char dev_path[512];
ALLOC_OBJ(dl);
if (mtab_name && strlen(mtab_name)) dl->name = strdup(mtab_name);
else {
char s[512]; short_name_for_device(major,minor,s); dl->name = strdup(s);
}
BLAHBLAH(1, printf("create_device(major=%d, minor=%d, mtab_name=%s) : name=%s\n", major,minor,mtab_name,dl->name));
dl->major = major; dl->minor = minor;
if (device_info(major,minor,dev_path,&dl->hd_id,&dl->part_id) == 0) {
BLAHBLAH(1, printf("(%d,%d) is not a known disc type..\n", major,minor));
free(dl); return NULL;
}
dl->dev_path = malloc(strlen(dev_path)+6); assert(dl->dev_path);
sprintf(dl->dev_path, "/dev/%s", dev_path);
dl->next = NULL;
if (dl->part_id == 0)
dl->enable_hddtemp = 1;
return dl;
}
/* add a device (after checking that it is a known device type) */
int add_device_by_name(const char *devname, const char *mtab_name) {
unsigned major, minor;
BLAHBLAH(1,printf("add_device_by_name(%s,%s)\n", devname, mtab_name));
if (device_id_from_name(devname, &major, &minor) != 0) return -1;
return add_device_by_id(major,minor,mtab_name);
}
/* add a device (after checking that it is a known device type) */
int add_device_by_id(unsigned major, unsigned minor, const char *mtab_name) {
DiskList *dl, *next, *prev;
BLAHBLAH(1,printf("add_device_by_id(%d,%d,%s)\n", major, minor,mtab_name));
/* already known ? */
if (find_dev(major,minor)) return -1;
/* check for known ide/scsi/md disks and then create */
dl = create_device(major, minor, mtab_name); if (!dl) return -1;
for (next = dlist, prev = NULL; next; next=next->next) {
if (dl->hd_id > next->hd_id || (dl->hd_id == next->hd_id && dl->part_id > next->part_id)) break;
prev = next;
}
if (prev == NULL) {
dl->next = dlist; dlist = dl;
} else {
dl->next = prev->next; prev->next = dl;
}
return 0;
}
strlist *swaplst = NULL;
void add_swap(const char *swapdev) {
swaplst = strlist_ins(swaplst, swapdev);
}
strlist *swap_list() {
return swaplst;
}