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	sys.c - 9base - revived minimalist port of Plan 9 userland to Unix
	git clone git://git.suckless.org/9base
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	---
	sys.c (745B)
	---
	1 #include "sam.h"
	2
	3 static int inerror=FALSE;
	4
	5 /*
	6 * A reasonable interface to the system calls
	7 */
	8
	9 void
	10 resetsys(void)
	11 {
	12 inerror = FALSE;
	13 }
	14
	15 void
	16 syserror(char *a)
	17 {
	18 char buf[ERRMAX];
	19
	20 if(!inerror){
	21 inerror=TRUE;
	22 errstr(buf, sizeof buf);
	23 dprint("%s: ", a);
	24 error_s(Eio, buf);
	25 }
	26 }
	27
	28 int
	29 Read(int f, void *a, int n)
	30 {
	31 char buf[ERRMAX];
	32
	33 if(read(f, (char *)a, n)!=n) {
	34 if (lastfile)
	35 lastfile->rescuing = 1;
	36 errstr(buf, sizeof buf);
	37 if (downloaded)
	38 fprint(2, "read error: %s\n", buf);
	39 rescue();
	40 exits("read");
	41 }
	42 return n;
	43 }
	44
	45 int
	46 Write(int f, void *a, int n)
	47 {
	48 int m;
	49
	50 if((m=write(f, (char *)a, n))!=n)
	51 syserror("write");
	52 return m;
	53 }
	54
	55 void
	56 Seek(int f, long n, int w)
	57 {
	58 if(seek(f, n, w)==-1)
	59 syserror("seek");
	60 }