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- #include "sys/types.h"
- #include "sys/stat.h"
- #include "fio.h"
- f_open(a) olist *a;
- { unit *b;
- int n;
- char buf[256];
- cllist x;
- if(a->ounit>=MXUNIT || a->ounit<0)
- err(a->oerr,101,"open")
- b= &units[a->ounit];
- if(b->ufd!=0) goto connected;
- unconnected:
- b->url=a->orl;
- if(*a->oblnk=='b') b->ublnk=1;
- else b->ublnk=0;
- if(a->ofm==0)
- { if(b->url>0) b->ufmt=0;
- else b->ufmt=1;
- }
- else if(*a->ofm=='f') b->ufmt=1;
- else b->ufmt=0;
- if(a->osta==0) goto unknown;
- switch(*a->osta)
- {
- unknown:
- default:
- case 'o':
- if(a->ofnm==0) err(a->oerr,107,"open")
- g_char(a->ofnm,a->ofnmlen,buf);
- b->uscrtch=0;
- if(*a->osta=='o' && access(buf,0))
- err(a->oerr,errno,"open")
- done:
- b->ufnm=(char *) calloc(strlen(buf)+1,sizeof(char));
- if(b->ufnm==NULL) err(a->oerr,113,"no space");
- strcpy(b->ufnm,buf);
- b->uend=0;
- if(isdev(buf))
- { b->ufd = fopen(buf,"r");
- if(b->ufd==NULL) err(a->oerr,errno,buf)
- else b->uwrt = 0;
- }
- else
- { b->ufd = fopen(buf, "a");
- if(b->ufd != NULL) b->uwrt = 1;
- else if((b->ufd = fopen(buf, "r")) != NULL)
- { fseek(b->ufd, 0L, 2);
- b->uwrt = 0;
- }
- else err(a->oerr, errno, buf)
- }
- b->useek=canseek(b->ufd);
- if((b->uinode=inode(buf))==-1)
- err(a->oerr,108,"open")
- if(a->orl && b->useek) rewind(b->ufd);
- return(0);
- case 's':
- b->uscrtch=1;
- strcpy(buf,"tmp.FXXXXXX");
- mktemp(buf);
- goto done;
- case 'n':
- b->uscrtch=0;
- if(a->ofnm==0) err(a->oerr,107,"open")
- g_char(a->ofnm,a->ofnmlen,buf);
- /*SYSDEP access*/
- if(access(buf, 0) == 0) creat(buf, 0666);
- goto done;
- }
- connected:
- if(a->ofnm==0)
- {
- same: if(a->oblnk!= 0) b->ublnk= *a->oblnk== 'b'?0:1;
- return(0);
- }
- g_char(a->ofnm,a->ofnmlen,buf);
- if(inode(buf)==b->uinode) goto same;
- x.cunit=a->ounit;
- x.csta=0;
- x.cerr=a->oerr;
- if((n=f_clos(&x))!=0) return(n);
- goto unconnected;
- }
- fk_open(rd,seq,fmt,n) ftnint n;
- { char nbuf[10];
- olist a;
- sprintf(nbuf,"fort.%D",n);
- a.oerr=1;
- a.ounit=n;
- a.ofnm=nbuf;
- a.ofnmlen=strlen(nbuf);
- a.osta=NULL;
- a.oacc= seq==SEQ?"s":"d";
- a.ofm = fmt==FMT?"f":"u";
- a.orl = seq==DIR?1:0;
- a.oblnk=NULL;
- return(f_open(&a));
- }
- isdev(s) char *s;
- { struct stat x;
- int j;
- if(stat(s, &x) == -1) return(0);
- if((j = (x.st_mode&S_IFMT)) == S_IFREG || j == S_IFDIR) return(0);
- else return(1);
- }
-