usr/src/cmd/sgs/libldmake/common/ld_file.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <libelf.h>
  33 #include <sys/param.h>
  34 #include <link.h>
  35
  36 #pragma init(ld_support_init)
  37
  38 #define SUNPRO_DEPENDENCIES     "SUNPRO_DEPENDENCIES"
  39
  40 /*
  41  * Linked list of strings - used to keep lists of names
  42  * of directories or files.
  43  */
  44 struct Stritem {
  45         char    *str;
  46         void    *next;
  47 };
  48
  49 typedef struct Stritem  Stritem;
  50
  51 static char     *depend_file = NULL;
  52 static Stritem  *list = NULL;
  53
  54 void
  55 ld_support_init()
  56 {
  57         depend_file = getenv(SUNPRO_DEPENDENCIES);
  58 }
  59
  60 static void
  61 prepend_str(Stritem **list, const char *str)
  62 {
  63         Stritem         *new;
  64         char            *newstr;
  65         const char      *lib = "libldmake.so";
  66
  67         if (!(new = calloc(1, sizeof (Stritem)))) {
  68                 perror(lib);
  69                 return;
  70         }
  71
  72         if (!(newstr = malloc(strlen(str) + 1))) {
  73                 perror(lib);
  74                 return;
  75         }
  76
  77         new->str = strcpy(newstr, str);
  78         new->next = *list;
  79         *list = new;
  80
  81 }
  82
  83 /* ARGSUSED */
  84 void
  85 ld_file(const char *file, const Elf_Kind ekind, int flags, Elf *elf)
  86 {
  87         /*
  88          * SUNPRO_DEPENDENCIES wasn't set, we don't collect .make.state
  89          * information.
  90          */
  91         if (!depend_file)
  92                 return;
  93
  94         if ((flags & LD_SUP_DERIVED) && !(flags & LD_SUP_EXTRACTED))
  95                 prepend_str(&list, file);
  96 }
  97
  98 void
  99 ld_file64(const char *file, const Elf_Kind ekind, int flags, Elf *elf)
 100 {
 101         ld_file(file, ekind, flags, elf);
 102 }
 103
 104 void
 105 ld_atexit(int exit_code)
 106 {
 107         Stritem         *cur;
 108         char            lockfile[MAXPATHLEN], *err, *space, *target;
 109         FILE            *ofp;
 110         extern char     *file_lock(char *, char *, int);
 111
 112         if (!depend_file || exit_code)
 113                 return;
 114
 115         if ((space = strchr(depend_file, ' ')) == NULL)
 116                 return;
 117         *space = '\0';
 118         target = &space[1];
 119
 120         (void) snprintf(lockfile, MAXPATHLEN, "%s.lock", depend_file);
 121         if ((err = file_lock(depend_file, lockfile, 0))) {
 122                 (void) fprintf(stderr, "%s\n", err);
 123                 return;
 124         }
 125
 126         if (!(ofp = fopen(depend_file, "a")))
 127                 return;
 128
 129         if (list)
 130                 (void) fprintf(ofp, "%s: ", target);
 131
 132         for (cur = list; cur; cur = cur->next)
 133                 (void) fprintf(ofp, " %s", cur->str);
 134
 135         (void) fputc('\n', ofp);
 136
 137         (void) fclose(ofp);
 138         (void) unlink(lockfile);
 139         *space = ' ';
 140 }
 141
 142 void
 143 ld_atexit64(int exit_code)
 144 {
 145         ld_atexit(exit_code);
 146 }