projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3443cb26 | 1 | /* |
| ff26b80a | 2 | char id_util[] = "@(#)util.c 1.5"; |
| 3443cb26 DW |
3 | * |
| 4 | * utility routines | |
| 5 | */ | |
| 6 | ||
| 7 | #include <sys/types.h> | |
| 8 | #include <sys/stat.h> | |
| 9 | #include "fio.h" | |
| 10 | ||
| 11 | ||
| dba44bf1 | 12 | ini_std(u,F,w,i66) FILE *F; |
| 3443cb26 DW |
13 | { unit *p; |
| 14 | p = &units[u]; | |
| 15 | p->ufd = F; | |
| 16 | p->ufnm = NULL; | |
| 17 | p->useek = canseek(F); | |
| 18 | p->ufmt = YES; | |
| 19 | p->uwrt = (w==WRITE)? YES : NO; | |
| 656fbd79 DW |
20 | p->uscrtch = p->uend = NO; |
| 21 | p->ublnk = p->uprnt = (i66!=0)? YES : NO; | |
| 3443cb26 DW |
22 | p->url = 0; |
| 23 | p->uinode = finode(F); | |
| 24 | } | |
| 25 | ||
| 26 | canseek(f) FILE *f; /*SYSDEP*/ | |
| 27 | { struct stat x; | |
| 28 | return( (fstat(fileno(f),&x)==0) && | |
| 29 | (x.st_nlink > 0 /*!pipe*/) && !isatty(fileno(f)) ); | |
| 30 | } | |
| 31 | ||
| 32 | nowreading(x) unit *x; | |
| 33 | { | |
| ff26b80a | 34 | return(now_acc(x,"r")); |
| 3443cb26 DW |
35 | } |
| 36 | ||
| 37 | nowwriting(x) unit *x; | |
| ff26b80a DW |
38 | { |
| 39 | return(now_acc(x,"a")); | |
| 40 | } | |
| 41 | ||
| 42 | now_acc(x,mode) | |
| 43 | unit *x; char *mode; | |
| 3443cb26 DW |
44 | { |
| 45 | long loc; | |
| ff26b80a DW |
46 | |
| 47 | if (!x->ufnm) | |
| 48 | { | |
| 49 | errno = EBADF; | |
| 50 | return(NO); | |
| 51 | } | |
| 52 | if (x->useek) | |
| 53 | loc=ftell(x->ufd); | |
| 54 | if (freopen(x->ufnm,mode,x->ufd)) | |
| 55 | { | |
| 56 | if (x->useek) | |
| 57 | fseek(x->ufd,loc,0); | |
| 58 | x->uwrt = (*mode=='a'); | |
| 59 | return(YES); | |
| 60 | } | |
| 61 | if (x->ufd = fopen(x->ufnm, (*mode=='a')? "r":"a")) | |
| 62 | if (x->useek) | |
| 63 | fseek(x->ufd,loc,0); | |
| 64 | return(NO); | |
| 3443cb26 DW |
65 | } |
| 66 | ||
| 67 | g_char(a,alen,b) char *a,*b; ftnlen alen; | |
| 68 | { char *x=a+alen-1, *y=b+alen-1; | |
| 69 | while (x >= a && *x == ' ') {x--; y--;} | |
| 70 | *(y+1) = '\0'; | |
| 71 | while (x >= a) *y-- = *x--; | |
| 72 | } | |
| 73 | ||
| 74 | b_char(from, to, tolen) char *from, *to; ftnlen tolen; | |
| 75 | { int i=0; | |
| 76 | while (*from && i < tolen) { | |
| 77 | *to++ = *from++; | |
| 78 | i++; | |
| 79 | } | |
| 80 | while (i++ < tolen) | |
| 81 | *to++ = ' '; | |
| 82 | } | |
| 83 | ||
| 84 | inode(a) char *a; | |
| 85 | { struct stat x; | |
| 86 | if(stat(a,&x)==0) return(x.st_ino); | |
| 87 | else return(-1); | |
| 88 | } | |
| 89 | ||
| 90 | finode(f) FILE *f; | |
| 91 | { struct stat x; | |
| 92 | if(fstat(fileno(f),&x)==0) return(x.st_ino); | |
| 93 | else return(-1); | |
| 94 | } | |
| 95 | ||
| 96 | char | |
| 97 | last_char(f) FILE *f; | |
| 98 | { | |
| 99 | fseek(f,-2L,1); | |
| 100 | if(ftell(f)) return(getc(f)); | |
| 101 | else return('\n'); | |
| 102 | } |