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hard disk about to die

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This commit is contained in:
albert
2003-09-28 02:45:05 +00:00
parent c462dcfad5
commit ac6260bc23
11 changed files with 449 additions and 399 deletions
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55
proc/devname.c
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@ -16,7 +16,6 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/sysmacros.h>
#include "version.h"
#include "devname.h"
@ -31,10 +30,23 @@
* dev_to_tty top, ps
*/
#if 0
#include <sys/sysmacros.h>
#define MAJOR_OF(d) ((unsigned)major(d))
#define MINOR_OF(d) ((unsigned)minor(d))
#else
#define MAJOR_OF(d) ( ((unsigned)(d)>>8u) & 0xfffu )
#define MINOR_OF(d) ( ((unsigned)(d)&0xffu) | (((unsigned)(d)&0xfff00000u)>>20u) )
#undef major
#undef minor
#define major <-- do not use -->
#define minor <-- do not use -->
#endif
typedef struct tty_map_node {
struct tty_map_node *next;
int major_number; /* not unsigned! Ugh... */
int minor_first, minor_last;
unsigned major_number;
unsigned minor_first, minor_last;
char name[16];
char devfs_type;
} tty_map_node;
@ -76,7 +88,7 @@ static void load_drivers(void){
tmn->major_number = atoi(p);
p += strspn(p, "0123456789");
while(*p == ' ') p++;
switch(sscanf(p, "%d-%d", &tmn->minor_first, &tmn->minor_last)){
switch(sscanf(p, "%u-%u", &tmn->minor_first, &tmn->minor_last)){
default:
/* Can't finish parsing this line so we remove it from the list */
tty_map = tty_map->next;
@ -95,7 +107,7 @@ fail:
}
/* Try to guess the device name from /proc/tty/drivers info. */
static int driver_name(char *restrict const buf, int maj, int min){
static int driver_name(char *restrict const buf, unsigned maj, unsigned min){
struct stat sbuf;
tty_map_node *tmn;
if(!tty_map) load_drivers();
@ -112,16 +124,16 @@ static int driver_name(char *restrict const buf, int maj, int min){
sprintf(buf, "/dev/%s", tmn->name); /* like "/dev/ttyZZ255" */
if(stat(buf, &sbuf) < 0) return 0;
}
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
/* Try to guess the device name (useful until /proc/PID/tty is added) */
static int guess_name(char *restrict const buf, int maj, int min){
static int guess_name(char *restrict const buf, unsigned maj, unsigned min){
struct stat sbuf;
int t0, t1;
int tmpmin = min;
unsigned tmpmin = min;
switch(maj){
case 4:
if(min<64){
@ -166,8 +178,8 @@ static int guess_name(char *restrict const buf, int maj, int min){
default: return 0;
}
if(stat(buf, &sbuf) < 0) return 0;
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
@ -175,7 +187,7 @@ static int guess_name(char *restrict const buf, int maj, int min){
* Useful names could be in /proc/PID/fd/2 (stderr, seldom redirected)
* and in /proc/PID/fd/255 (used by bash to remember the tty).
*/
static int link_name(char *restrict const buf, int maj, int min, int pid, const char *restrict name){
static int link_name(char *restrict const buf, unsigned maj, unsigned min, int pid, const char *restrict name){
struct stat sbuf;
char path[32];
int count;
@ -184,25 +196,26 @@ static int link_name(char *restrict const buf, int maj, int min, int pid, const
if(count == -1) return 0;
buf[count] = '\0';
if(stat(buf, &sbuf) < 0) return 0;
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
/* number --> name */
unsigned dev_to_tty(char *restrict ret, unsigned chop, int dev, int pid, unsigned int flags) {
unsigned dev_to_tty(char *restrict ret, unsigned chop, dev_t dev_t_dev, int pid, unsigned int flags) {
static char buf[PAGE_SIZE];
char *restrict tmp = buf;
unsigned dev = dev_t_dev;
unsigned i = 0;
int c;
if((short)dev == (short)0) goto no_tty;
if(dev == 0u) goto no_tty;
if(linux_version_code > LINUX_VERSION(2, 7, 0)){ // not likely to make 2.6.xx
if(link_name(tmp, major(dev), minor(dev), pid, "tty" )) goto abbrev;
if(link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "tty" )) goto abbrev;
}
if(driver_name(tmp, major(dev), minor(dev) )) goto abbrev;
if( link_name(tmp, major(dev), minor(dev), pid, "fd/2" )) goto abbrev;
if( guess_name(tmp, major(dev), minor(dev) )) goto abbrev;
if( link_name(tmp, major(dev), minor(dev), pid, "fd/255")) goto abbrev;
if(driver_name(tmp, MAJOR_OF(dev), MINOR_OF(dev) )) goto abbrev;
if( link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "fd/2" )) goto abbrev;
if( guess_name(tmp, MAJOR_OF(dev), MINOR_OF(dev) )) goto abbrev;
if( link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "fd/255")) goto abbrev;
// fall through if unable to find a device file
no_tty:
strcpy(ret, "?");