ref: 616f62253e1690a5f1e365d2122b300fc7922257
dir: /sys/src/ape/cmd/make/files.c/
/* POSIX DEPENDENT PROCEDURES */
#include "defs.h"
#include <sys/stat.h>
#include <ar.h>
#define NAMESPERBLOCK 32
/* DEFAULT RULES FOR POSIX */
char *dfltmacro[] =
{
".SUFFIXES : .o .c .y .l .a .sh .f",
"MAKE=make",
"AR=ar",
"ARFLAGS=rv",
"YACC=yacc",
"YFLAGS=",
"LEX=lex",
"LFLAGS=",
"LDFLAGS=",
"CC=c89",
"CFLAGS=-O",
"FC=fort77",
"FFLAGS=-O 1",
0 };
char *dfltpat[] =
{
"%.o : %.c",
"\t$(CC) $(CFLAGS) -c $<",
"%.o : %.y",
"\t$(YACC) $(YFLAGS) $<",
"\t$(CC) $(CFLAGS) -c y.tab.c",
"\trm y.tab.c",
"\tmv y.tab.o $@",
"%.o : %.l",
"\t$(LEX) $(LFLAGS) $<",
"\t$(CC) $(CFLAGS) -c lex.yy.c",
"\trm lex.yy.c",
"\tmv lex.yy.o $@",
"%.c : %.y",
"\t$(YACC) $(YFLAGS) $<",
"\tmv y.tab.c $@",
"%.c : %.l",
"\t$(LEX) $(LFLAGS) $<",
"\tmv lex.yy.c $@",
"% : %.o",
"\t$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<",
"% : %.c",
"\t$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<",
0 };
char *dfltsuff[] =
{
".SUFFIXES : .o .c .y .l .a .sh .f",
".c.o :",
"\t$(CC) $(CFLAGS) -c $<",
".f.o :",
"\t$(FC) $(FFLAGS) -c $<",
".y.o :",
"\t$(YACC) $(YFLAGS) $<",
"\t$(CC) $(CFLAGS) -c y.tab.c",
"\trm -f y.tab.c",
"\tmv y.tab.o $@",
".l.o :",
"\t$(LEX) $(LFLAGS) $<",
"\t$(CC) $(CFLAGS) -c lex.yy.c",
"\trm -f lex.yy.c",
"\tmv lex.yy.o $@",
".y.c :",
"\t$(YACC) $(YFLAGS) $<",
"\tmv y.tab.c $@",
".l.c :",
"\t$(LEX) $(LFLAGS) $<",
"\tmv lex.yy.c $@",
".c.a:",
"\t$(CC) -c $(CFLAGS) $<",
"\t$(AR) $(ARFLAGS) $@ $*.o",
"\trm -f $*.o",
".f.a:",
"\t$(FC) -c $(FFLAGS) $<",
"\t$(AR) $(ARFLAGS) $@ $*.o",
"\trm -f $*.o",
".c:",
"\t$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<",
".f:",
"\t$(FC) $(FFLAGS) $(LDFLAGS) -o $@ $<",
".sh:",
"\tcp $< $@",
"\tchmod a+x $@",
0 };
static struct dirhd *opdir(char *, int);
static void cldir(struct dirhd *, int);
static int amatch(char *, char *);
static int umatch(char *, char *);
static void clarch(void);
static int openarch(char *);
static int getarch(void);
time_t
exists(char *filename)
{
struct stat buf;
char *s;
for(s = filename ; *s!='\0' && *s!='(' && *s!=')' ; ++s)
;
if(*s != '\0')
return lookarch(filename);
if(stat(filename,&buf) < 0)
return 0;
else return buf.st_mtime;
}
time_t
prestime(void)
{
time_t t;
time(&t);
return t;
}
static char nmtemp[MAXNAMLEN+1]; /* guarantees a null after the name */
static char *tempend = nmtemp + MAXNAMLEN;
depblkp
srchdir(char *pat, int mkchain, depblkp nextdbl)
{
DIR *dirf;
struct dirhd *dirptr;
char *dirname, *dirpref, *endir, *filepat, *p, temp[100];
char fullname[100];
nameblkp q;
depblkp thisdbl;
struct pattern *patp;
struct dirent *dptr;
thisdbl = 0;
if(mkchain == NO)
for(patp=firstpat ; patp ; patp = patp->nxtpattern)
if(equal(pat, patp->patval)) return 0;
patp = ALLOC(pattern);
patp->nxtpattern = firstpat;
firstpat = patp;
patp->patval = copys(pat);
endir = 0;
for(p=pat; *p!='\0'; ++p)
if(*p=='/') endir = p;
if(endir==0)
{
dirname = ".";
dirpref = "";
filepat = pat;
}
else {
dirname = pat;
*endir = '\0';
dirpref = concat(dirname, "/", temp);
filepat = endir+1;
}
dirptr = opdir(dirname,YES);
dirf = dirptr->dirfc;
for( dptr = readdir(dirf) ; dptr ; dptr = readdir(dirf) )
{
char *p1, *p2;
p1 = dptr->d_name;
p2 = nmtemp;
while( (p2<tempend) && (*p2++ = *p1++)!='\0')
;
if( amatch(nmtemp,filepat) )
{
concat(dirpref,nmtemp,fullname);
if( (q=srchname(fullname)) ==0)
q = makename(copys(fullname));
if(mkchain)
{
thisdbl = ALLOC(depblock);
thisdbl->nxtdepblock = nextdbl;
thisdbl->depname = q;
nextdbl = thisdbl;
}
}
}
if(endir)
*endir = '/';
cldir(dirptr, YES);
return thisdbl;
}
static struct dirhd *
opdir(char *dirname, int stopifbad)
{
struct dirhd *od;
for(od = firstod; od; od = od->nxtdirhd)
if(equal(dirname, od->dirn) )
break;
if(od == NULL)
{
++nopdir;
od = ALLOC(dirhd);
od->nxtdirhd = firstod;
firstod = od;
od->dirn = copys(dirname);
}
if(od->dirfc==NULL && (od->dirfc = opendir(dirname)) == NULL && stopifbad)
{
fprintf(stderr, "Directory %s: ", dirname);
fatal("Cannot open");
}
return od;
}
static void
cldir(struct dirhd *dp, int used)
{
if(nopdir >= MAXDIR)
{
closedir(dp->dirfc);
dp->dirfc = NULL;
}
else if(used)
rewinddir(dp->dirfc); /* start over at the beginning */
}
/* stolen from glob through find */
static int
amatch(char *s, char *p)
{
int cc, scc, k;
int c, lc;
scc = *s;
lc = 077777;
switch (c = *p) {
case '[':
k = 0;
while (cc = *++p) {
switch (cc) {
case ']':
if (k)
return amatch(++s, ++p);
else
return 0;
case '-':
k |= (lc <= scc) & (scc <= (cc=p[1]) ) ;
}
if (scc==(lc=cc)) k++;
}
return 0;
case '?':
caseq:
if(scc) return amatch(++s, ++p);
return 0;
case '*':
return umatch(s, ++p);
case 0:
return !scc;
}
if (c==scc) goto caseq;
return 0;
}
static int
umatch(char *s, char *p)
{
if(*p==0) return 1;
while(*s)
if (amatch(s++,p)) return 1;
return 0;
}
#ifdef METERFILE
#include <pwd.h>
int meteron = 0; /* default: metering off */
extern void meter(char *file)
{
time_t tvec;
char *p;
FILE * mout;
struct passwd *pwd;
if(file==0 || meteron==0) return;
pwd = getpwuid(getuid());
time(&tvec);
if( mout = fopen(file,"a") )
{
p = ctime(&tvec);
p[16] = '\0';
fprintf(mout, "User %s, %s\n", pwd->pw_name, p+4);
fclose(mout);
}
}
#endif
/* look inside archives for notation a(b)
a(b) is file member b in archive a
*/
static long arflen;
static long arfdate;
static char arfname[16];
FILE *arfd;
long int arpos, arlen;
time_t
lookarch(char *filename)
{
char *p, *q, *send, s[15], pad;
int i, nc, nsym;
for(p = filename; *p!= '(' ; ++p)
;
*p = '\0';
if( ! openarch(filename) )
{
*p = '(';
return 0L;
}
*p++ = '(';
nc = 14;
pad = ' ';
send = s + nc;
for( q = s ; q<send && *p!='\0' && *p!=')' ; *q++ = *p++ )
;
if(p[0]==')' && p[1]!='\0') /* forbid stuff after the paren */
{
clarch();
return 0L;
}
while(q < send)
*q++ = pad;
while(getarch())
{
if( !strncmp(arfname, s, nc))
{
clarch();
/*TEMP fprintf(stderr, "found archive member %14s, time=%d\n", s, arfdate); */
return arfdate;
}
}
clarch();
return 0L;
}
static void
clarch(void)
{
fclose( arfd );
}
static int
openarch(char *f)
{
char magic[SARMAG];
int word;
struct stat buf;
nameblkp p;
stat(f, &buf);
arlen = buf.st_size;
arfd = fopen(f, "r");
if(arfd == NULL)
return NO;
/* fatal1("cannot open %s", f); */
fread( (char *) &word, sizeof(word), 1, arfd);
fseek(arfd, 0L, 0);
fread(magic, SARMAG, 1, arfd);
arpos = SARMAG;
if( strncmp(magic, ARMAG, SARMAG) )
fatal1("%s is not an archive", f);
if( !(p = srchname(f)) )
p = makename( copys(f) );
p->isarch = YES;
arflen = 0;
return YES;
}
static int
getarch(void)
{
struct ar_hdr arhead;
arpos += (arflen + 1) & ~1L; /* round archived file length up to even */
if(arpos >= arlen)
return 0;
fseek(arfd, arpos, 0);
fread( (char *) &arhead, sizeof(arhead), 1, arfd);
arpos += sizeof(arhead);
arflen = atol(arhead.ar_size);
arfdate = atol(arhead.ar_date);
strncpy(arfname, arhead.ar_name, sizeof(arhead.ar_name));
return 1;
}
/* find the directory containing name.
read it into the hash table if it hasn't been used before or if
if might have changed since last reference
*/
void
dirsrch(char *name)
{
DIR *dirf;
struct dirhd *dirp;
time_t dirt, objt;
int dirused, hasparen;
char *dirname, *lastslash;
char *fullname, *filepart, *fileend, *s;
struct dirent *dptr;
lastslash = NULL;
hasparen = NO;
for(s=name; *s; ++s)
if(*s == '/')
lastslash = s;
else if(*s=='(' || *s==')')
hasparen = YES;
if(hasparen)
{
if(objt = lookarch(name))
makename(name)->modtime = objt;
return;
}
if(lastslash)
{
dirname = name;
*lastslash = '\0';
}
else
dirname = ".";
dirused = NO;
dirp = opdir(dirname, NO);
dirf = dirp->dirfc;
if(dirp->dirok || !dirf)
goto ret;
dirt = exists(dirname);
if(dirp->dirtime == dirt)
goto ret;
dirp->dirok = YES;
dirp->dirtime = dirt;
dirused = YES;
/* allocate buffer to hold full file name */
if(lastslash)
{
fullname = (char *) ckalloc(strlen(dirname)+MAXNAMLEN+2);
concat(dirname, "/", fullname);
filepart = fullname + strlen(fullname);
}
else
filepart = fullname = (char *) ckalloc(MAXNAMLEN+1);
fileend = filepart + MAXNAMLEN;
*fileend = '\0';
for(dptr = readdir(dirf) ; dptr ; dptr = readdir(dirf) )
{
char *p1, *p2;
p1 = dptr->d_name;
p2 = filepart;
while( (p2<fileend) && (*p2++ = *p1++)!='\0')
;
if( ! srchname(fullname) )
(void) makename(copys(fullname));
}
free(fullname);
ret:
cldir(dirp, dirused);
if(lastslash)
*lastslash = '/';
}
void
baddirs(void)
{
struct dirhd *od;
for(od = firstod; od; od = od->nxtdirhd)
od->dirok = NO;
}