projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8cbb423c BJ |
1 | /* subr_prf.c 3.1 %H% */ |
| 2 | ||
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/systm.h" | |
| 5 | #include "../h/seg.h" | |
| 6 | #include "../h/buf.h" | |
| 7 | #include "../h/conf.h" | |
| 8 | ||
| 9 | /* | |
| 10 | * In case console is off, | |
| 11 | * panicstr contains argument to last | |
| 12 | * call to panic. | |
| 13 | */ | |
| 14 | ||
| 15 | char *panicstr; | |
| 16 | ||
| 17 | /* | |
| 18 | * Scaled down version of C Library printf. | |
| 19 | * Only %s %u %d (==%u) %o %x %D are recognized. | |
| 20 | * Used to print diagnostic information | |
| 21 | * directly on console tty. | |
| 22 | * Since it is not interrupt driven, | |
| 23 | * all system activities are pretty much | |
| 24 | * suspended. | |
| 25 | * Printf should not be used for chit-chat. | |
| 26 | */ | |
| 27 | /*VARARGS1*/ | |
| 28 | printf(fmt, x1) | |
| 29 | register char *fmt; | |
| 30 | unsigned x1; | |
| 31 | { | |
| 32 | register c; | |
| 33 | register unsigned int *adx; | |
| 34 | char *s; | |
| 35 | ||
| 36 | adx = &x1; | |
| 37 | loop: | |
| 38 | while((c = *fmt++) != '%') { | |
| 39 | if(c == '\0') | |
| 40 | return; | |
| 41 | putchar(c); | |
| 42 | } | |
| 43 | c = *fmt++; | |
| 44 | if(c == 'X') | |
| 45 | printx((long)*adx); | |
| 46 | else if(c == 'd' || c == 'u' || c == 'o' || c == 'x') | |
| 47 | printn((long)*adx, c=='o'? 8: (c=='x'? 16:10)); | |
| 48 | else if(c == 's') { | |
| 49 | s = (char *)*adx; | |
| 50 | while(c = *s++) | |
| 51 | putchar(c); | |
| 52 | } else if (c == 'D') { | |
| 53 | printn(*(long *)adx, 10); | |
| 54 | adx += (sizeof(long) / sizeof(int)) - 1; | |
| 55 | } | |
| 56 | adx++; | |
| 57 | goto loop; | |
| 58 | } | |
| 59 | ||
| 60 | printx(x) | |
| 61 | long x; | |
| 62 | { | |
| 63 | int i; | |
| 64 | ||
| 65 | for (i = 0; i < 8; i++) | |
| 66 | putchar("0123456789ABCDEF"[(x>>((7-i)*4))&0xf]); | |
| 67 | } | |
| 68 | ||
| 69 | /* | |
| 70 | * Print an unsigned integer in base b. | |
| 71 | */ | |
| 72 | printn(n, b) | |
| 73 | long n; | |
| 74 | { | |
| 75 | register long a; | |
| 76 | ||
| 77 | if (n<0) { /* shouldn't happen */ | |
| 78 | putchar('-'); | |
| 79 | n = -n; | |
| 80 | } | |
| 81 | if(a = n/b) | |
| 82 | printn(a, b); | |
| 83 | putchar("0123456789ABCDEF"[(int)(n%b)]); | |
| 84 | } | |
| 85 | ||
| 86 | /* | |
| 87 | * Panic is called on unresolvable | |
| 88 | * fatal errors. | |
| 89 | * It syncs, prints "panic: mesg" and | |
| 90 | * then loops. | |
| 91 | */ | |
| 92 | panic(s) | |
| 93 | char *s; | |
| 94 | { | |
| 95 | panicstr = s; | |
| 96 | update(); | |
| 97 | printf("panic: %s\n", s); | |
| 98 | spl0(); | |
| 99 | for(;;) | |
| 100 | ; | |
| 101 | } | |
| 102 | ||
| 103 | /* | |
| 104 | * prdev prints a warning message of the | |
| 105 | * form "mesg on dev x/y". | |
| 106 | * x and y are the major and minor parts of | |
| 107 | * the device argument. | |
| 108 | */ | |
| 109 | prdev(str, dev) | |
| 110 | char *str; | |
| 111 | dev_t dev; | |
| 112 | { | |
| 113 | ||
| 114 | printf("%s on dev %u/%u\n", str, major(dev), minor(dev)); | |
| 115 | } | |
| 116 | ||
| 117 | /* | |
| 118 | * deverr prints a diagnostic from | |
| 119 | * a device driver. | |
| 120 | * It prints the device, block number, | |
| 121 | * and an octal word (usually some error | |
| 122 | * status register) passed as argument. | |
| 123 | */ | |
| 124 | deverror(bp, o1, o2) | |
| 125 | register struct buf *bp; | |
| 126 | { | |
| 127 | ||
| 128 | prdev("err", bp->b_dev); | |
| 129 | printf("bn=%d er=%x,%x\n", bp->b_blkno, o1,o2); | |
| 130 | } |