Initial commit

1 files changed, 355 insertions, 0 deletions

diff --git a/unix/boot/mkpkg/scanlib.c b/unix/boot/mkpkg/scanlib.c
new file mode 100644
index 00000000..cb70efd5
--- /dev/null
+++ b/unix/boot/mkpkg/scanlib.c
@@ -0,0 +1,355 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#include <ar.h>
+#ifdef MACOSX
+#include <ranlib.h>
+#include <mach-o/fat.h>
+#endif
+
+#define import_spp
+#include <iraf.h>
+#include "mkpkg.h"
+#include "extern.h"
+
+#ifdef  OLD_MACOSX
+#define AR_EFMT1	1
+#endif
+
+
+/*
+ * SCANLIB.C -- Routines to scan a 4.2BSD UNIX archive file and create a
+ * symbol table naming the files in the archive and their dates.
+ *
+ * External entry points:
+ *
+ *	h_scanlibrary (libname)		extract list of modules and their dates
+ *	h_ardate (modname)		return long integer module date
+ */
+
+#define	SZ_KEY		128		/* arbitrary			*/
+extern	int forceupdate;		/* NOT IMPLEMENTED for UNIX	*/
+
+char	mlb_sbuf[SZ_SBUF];		/* string buffer		*/
+int	mlb_op = 0;			/* index into string buffer	*/
+int	mlb_index[MAX_LIBFILES];	/* sbuf indices for each symbol	*/
+long	mlb_fdate[MAX_LIBFILES];	/* file date of each module	*/
+int	mlb_modified;			/* modified flag		*/
+char	*mlb_filename();
+
+struct	dbentry {			/* module entry on disk		*/
+	long	fdate;
+	int	keylen;
+	/* key chars */
+};
+
+
+/**
+ *  Local procedure declarations.
+ */
+int mlb_setdate (char *modname, long fdate);
+
+
+
+/* SCANLIBRARY -- Scan the archive file, extract module names and dates,
+ * building the "ar" module list.
+ */
+int
+h_scanlibrary (char *library)
+{
+	register char	*ip, *op;
+	register int	i, is_fat = 0;
+	char	libfname[SZ_PATHNAME+1];
+	char	modname[SZ_KEY+1];
+	char	lbuf[SZ_LINE];
+	struct	ar_hdr arf;
+	long	length, fdate;
+	int	len=0, len_arfmag, nmodules;
+	FILE	*fp;
+
+	/* Get the library file name. */
+	h_getlibname (library, libfname);
+
+	/* Clear the symbol table.
+	 */
+	mlb_modified = NO;
+	mlb_op = 1;
+	nmodules = 0;
+
+	len = 0;
+	for (i=0;  i < MAX_LIBFILES;  i++)
+	    mlb_index[i] = 0;
+
+	/* Open the UNIX archive file.
+	 */
+	if ((fp = fopen (libfname, "r")) == NULL) {
+	    printf ("warning: library `%s' not found\n", libfname);
+	    fflush (stdout);
+	    return (0);
+	}
+
+	if (debug) {
+	    printf ("scan unix archive %s:\n", libfname);
+	    fflush (stdout);
+	}
+
+	/* Verify that file is indeed an archive file.
+	 */
+	memset (lbuf, 0, SZ_LINE);
+	fread (lbuf, 1, SARMAG, fp);
+	if (strncmp (lbuf, ARMAG, SARMAG) != 0) {
+#ifndef MACOSX
+	    printf ("file `%s' is not a library\n", libfname);
+	    goto err;
+#else
+	    /* See if it's a FAT archive file.
+	    */
+	    struct fat_header fh;
+	    struct fat_arch   fa;
+	    char *ip;
+
+	    rewind (fp);
+	    memset (&fh, 0, sizeof(struct fat_header));
+	    fread (&fh, 1, sizeof(struct fat_header), fp);  /* read header */
+	    if (fh.magic == FAT_MAGIC || fh.magic == FAT_CIGAM) {
+		int   narch = 0;
+
+		is_fat++;
+
+		/* The following is a cheat to avoid byte swapping the
+		 * nfat_arch field in Intel systems.  Assumes we'll never
+		 * see more that 8-bits worth of architectures. 8-)
+		 */
+	    	ip = (char *) &fh, ip += 7;
+		memmove (&narch, ip, 1);
+		for (i=0; i < narch; i++) {	    /* skip headers */
+		    memset (&fa, 0, sizeof(struct fat_arch));
+	            fread (&fa, 1, sizeof(struct fat_arch), fp);
+	        }
+
+		/* Read the AR header.
+		 */
+		memset (lbuf, 0, SZ_LINE);
+		fread (lbuf, 1, SARMAG, fp);
+	        if (strncmp (lbuf, ARMAG, SARMAG) != 0) {
+	            printf ("file `%s' is not a library\n", libfname);
+	            goto err;
+	        }
+	    } else {
+	        printf ("file `%s' is not a library\n", libfname);
+	        goto err;
+	    }
+#endif
+	}
+
+	len_arfmag = strlen (ARFMAG);
+	memset (&arf, 0, sizeof(arf));
+	while ((int)(fread (&arf, 1, sizeof(arf), fp)) > 0) {
+
+	    /* Don't scan past the first architecture for FAT libs.
+	     */
+	    if (is_fat && strncmp (arf.ar_name, ARMAG, SARMAG) == 0) 
+		break;
+
+	    if (strncmp (arf.ar_fmag, ARFMAG, len_arfmag) != 0) {
+		printf ("cannot decode library `%s'\n", libfname);
+		goto err;
+	    }
+
+	    if (debug > 1) {
+		char     name[17], date[13];
+		strncpy (name, arf.ar_name, 16);  name[16] = '\0';
+		strncpy (date, arf.ar_date, 12);  date[12] = '\0'; 
+		printf ("objname='%s', date='%s'\n", name, date);
+	    }
+
+	    /* Extract module name.  */
+	    for (ip=arf.ar_name;  *ip == ' ';  ip++) ;
+	    for (op=modname;  (*op = *ip++) != ' ' && *op != '/';  op++) ;
+	    *op++ = EOS;
+
+	    /* Skip dummy entry with null modname (COFF format) as well
+	     * as the __SYMDEF from ranlib.
+	     */
+#ifdef MACOSX
+	    if (strncmp (modname, RANLIBMAG, 9) || modname[0] != EOS) {
+#else
+	    if (modname[0] != EOS) {
+#endif
+#if defined(AR_EFMT1) && !defined(__CYGWIN__)
+	        /*
+	         * BSD 4.4 extended AR format: #1/<namelen>, with name as the
+	         * first <namelen> bytes of the file
+	         */
+	        if ((arf.ar_name[0] == '#') &&
+		    (arf.ar_name[1] == '1') &&
+		    (arf.ar_name[2] == '/') && (isdigit(arf.ar_name[3]))) {
+
+		        char p[SZ_PATHNAME];
+
+		        len = atoi(&arf.ar_name[3]);
+	                bzero (p, SZ_PATHNAME);
+		        if (fread(p, len, 1, fp) != 1) {
+		            fprintf (stderr, "%s: premature EOF", libfname);
+		        }
+	                bzero (modname, SZ_KEY+1);
+		        sprintf (modname, "%s", p);
+	        } else 
+		    len = 0;
+#endif
+	        /* Get module date.  */
+	        sscanf (arf.ar_date, "%ld", &fdate);
+
+	        /* Insert entry into symbol table. */
+	        mlb_setdate (modname, fdate);
+	    } 
+
+	    /* Advance to the next entry.
+	     */
+	    if (sscanf (arf.ar_size, "%ld", &length) == 1) {
+		if (length & 1)				/* must be even */
+		    length++;
+#if defined(AR_EFMT1) && !defined(__CYGWIN__)
+		fseek (fp, length-len, 1);
+#else
+		fseek (fp, length, 1);
+#endif
+	    } else {
+		printf ("could not decode length `%s' of library module\n",
+		    arf.ar_size);
+		goto err;
+	    }
+	
+	    memset (&arf, 0, sizeof(arf));
+	}
+
+	fclose (fp);
+	return (nmodules);
+
+err:
+	fflush (stdout);
+	fclose (fp);
+	return (ERR);
+}
+
+
+/* H_ARDATE -- Look up file in archive.  If found, return date of archive
+ * version, otherwise return zero.  This is the entry point called by MKLIB
+ * to get the update date of a library module.
+ */
+long
+h_ardate (char *fname)
+{
+	extern	char *makeobj();
+	long	mlb_getdate();
+
+	return (mlb_getdate (makeobj (fname)));
+}
+
+
+/* MLB_SETDATE -- Enter the given module and file date into the symbol table,
+ * or update the file date if the module is already present in the table.
+ */
+int
+mlb_setdate (
+  char	*modname,		/* module name		*/
+  long	fdate 			/* object file date	*/
+)
+{
+	register int	hashval, keylen, i;
+	register char	*ip;
+	int	start;
+
+
+	if (*modname == EOS || fdate <= 0) {
+	    printf ("warning, mlb_setdate: attempted illegal entry for %s\n",
+		modname);
+	    fflush (stdout);
+	    return (ERR);
+	}
+
+	/* Hash the key.
+	 */
+	for (hashval=0, keylen=0, ip=modname;  *ip;  ip++, keylen++)
+	    hashval += hashval + *ip;
+	start = hashval % MAX_LIBFILES;
+
+	mlb_modified = YES;
+
+	/* Update the entry if the module is already in the table, else find
+	 * an empty slot, checking for table overflow in the process.
+	 */
+	for (i=start;  mlb_index[i];  ) {
+	    ip = &mlb_sbuf[mlb_index[i]];
+	    if (*ip == *modname)
+		if (strncmp (modname, ip, keylen) == 0) {
+		    mlb_fdate[i] = fdate;
+		    return (OK);
+		}
+	    if (++i >= MAX_LIBFILES)
+		i = 0;
+	    if (i == start) {
+		printf ("error: library module list overflow\n");
+		fflush (stdout);
+		return (ERR);
+	    }
+	}
+
+	if (mlb_op + keylen + 1 >= SZ_SBUF) {
+	    printf ("error: library module list string buffer overflow\n");
+	    fflush (stdout);
+	    return (ERR);
+	}
+
+	/* Enter the module into the symbol table.
+	 */
+	mlb_index[i] = mlb_op;
+	mlb_fdate[i] = fdate;
+
+	strcpy (&mlb_sbuf[mlb_op], modname);
+	mlb_op += (keylen + 1);
+
+	return (OK);
+}
+
+
+/* MLB_GETDATE -- Lookup a module in the symbol table and return its date.
+ * Return zero if the module is not found.
+ */
+long
+mlb_getdate (char *modname)
+{
+	register int	hashval, keylen, i;
+	register char	*ip;
+	int	start;
+
+	if (*modname == EOS)
+	    return (0L);
+
+	/* Hash the key.
+	 */
+	for (hashval=0, keylen=0, ip=modname;  *ip;  ip++, keylen++)
+	    hashval += hashval + *ip;
+	start = hashval % MAX_LIBFILES;
+
+	/* Search the symbol table for the named module.
+	 */
+	for (i=start;  mlb_index[i];  ) {
+	    ip = &mlb_sbuf[mlb_index[i]];
+	    if (*ip == *modname)
+		if (strncmp (modname, ip, keylen) == 0)
+		    return (mlb_fdate[i]);
+	    if (++i >= MAX_LIBFILES)
+		i = 0;
+	    if (i == start)
+		return (0L);
+	}
+
+	return (0L);
+}