src/fileunix.c

   1 /*
   2  * Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
   3  *
   4  * This file is part of Jam - see jam.c for Copyright information.
   5  */
   6
   7 /*
   8  * fileunix.c - manipulate file names and scan directories on UNIX/AmigaOS
   9  *
  10  * External routines:
  11  *
  12  *  file_dirscan() - scan a directory for files
  13  *  file_time() - get timestamp of file, if not done by file_dirscan()
  14  *  file_archscan() - scan an archive for files
  15  *
  16  * File_dirscan() and file_archscan() call back a caller provided function
  17  * for each file found.  A flag to this callback function lets file_dirscan()
  18  * and file_archscan() indicate that a timestamp is being provided with the
  19  * file.   If file_dirscan() or file_archscan() do not provide the file's
  20  * timestamp, interested parties may later call file_time().
  21  *
  22  * 04/08/94 (seiwald) - Coherent/386 support added.
  23  * 12/19/94 (mikem) - solaris string table insanity support
  24  * 02/14/95 (seiwald) - parse and build /xxx properly
  25  * 05/03/96 (seiwald) - split into pathunix.c
  26  * 11/21/96 (peterk) - BEOS does not have Unix-style archives
  27  * 01/08/01 (seiwald) - closure param for file_dirscan/file_archscan
  28  * 04/03/01 (seiwald) - AIX uses SARMAG
  29  * 07/16/02 (seiwald) - Support BSD style long filename in archives.
  30  * 11/04/02 (seiwald) - const-ing for string literals
  31  * 12/27/02 (seiwald) - support for AIX big archives
  32  * 12/30/02 (seiwald) - terminate ar_hdr for solaris sscanf()
  33  * 12/30/02 (seiwald) - skip solaris' empty archive member names (/, //xxx)
  34  */
  35 #include <unistd.h>
  36
  37 #include "jam.h"
  38 #include "filesys.h"
  39 #include "pathsys.h"
  40
  41 #ifdef USE_FILEUNIX
  42
  43 #if defined(OS_SEQUENT) || defined(OS_DGUX) || defined(OS_SCO) || defined(OS_ISC)
  44 # define PORTAR  1
  45 #endif
  46
  47 #if defined(OS_MACOSX)
  48 /* need unistd for rhapsody's proper lseek */
  49 # include <sys/dir.h>
  50 # include <unistd.h>
  51 # define STRUCT_DIRENT struct direct
  52 #else
  53 # include <dirent.h>
  54 # define STRUCT_DIRENT struct dirent
  55 #endif
  56
  57 #include <ar.h>
  58
  59
  60 // <0: error; 0: regular; 1: directory
  61 int getFileType (const char *diskname) {
  62   struct stat stbuf;
  63   //
  64   if (access(diskname, R_OK) != 0) return -1;
  65   if (stat(diskname, &stbuf) != 0) return -1;
  66   if (S_ISDIR(stbuf.st_mode)) return 1;
  67   if (S_ISREG(stbuf.st_mode)) return 0;
  68   return -1;
  69 }
  70
  71
  72 /*
  73  * file_dirscan() - scan a directory for files
  74  */
  75 void file_dirscan (const char *dir, scanback func, void *closure) {
  76   PATHNAME f;
  77   DIR *d;
  78   STRUCT_DIRENT *dirent;
  79   char filename[MAXJPATH];
  80   //
  81   /* first enter directory itself */
  82   memset((char *)&f, '\0', sizeof(f));
  83   f.f_dir.ptr = dir;
  84   f.f_dir.len = strlen(dir);
  85   dir = *dir?dir:".";
  86   /* special case / : enter it */
  87   if (f.f_dir.len == 1 && f.f_dir.ptr[0] == '/') (*func)(closure, dir, 0 /* not stat()'ed */, (time_t)0);
  88   /* Now enter contents of directory */
  89   if (!(d = opendir(dir))) return;
  90   if (DEBUG_BINDSCAN) printf("scan directory %s\n", dir);
  91   while ((dirent = readdir(d))) {
  92 #ifdef old_sinix
  93     /* broken structure definition on sinix. */
  94     f.f_base.ptr = dirent->d_name-2;
  95 #else
  96     f.f_base.ptr = dirent->d_name;
  97 #endif
  98     f.f_base.len = strlen(f.f_base.ptr);
  99     path_build(&f, filename, 0);
 100     (*func)(closure, filename, 0 /* not stat()'ed */, (time_t)0);
 101   }
 102   closedir(d);
 103 }
 104
 105
 106 /*
 107  * file_time() - get timestamp of file, if not done by file_dirscan()
 108  */
 109 int file_time (const char *filename, time_t *time) {
 110   struct stat statbuf;
 111   //
 112   if (stat(filename, &statbuf) < 0) return -1;
 113   *time = statbuf.st_mtime;
 114   return 0;
 115 }
 116
 117
 118 /*
 119  * file_archscan() - scan an archive for files
 120  */
 121 #define SARFMAG  2
 122 #define SARHDR   sizeof(struct ar_hdr)
 123
 124 void file_archscan (const char *archive, scanback func, void *closure) {
 125 #ifndef NO_AR
 126   struct ar_hdr ar_hdr;
 127   char buf[MAXJPATH];
 128   long offset;
 129   char *string_table = 0;
 130   int fd;
 131   //
 132   if ((fd = open(archive, O_RDONLY, 0)) < 0) return;
 133   if (read(fd, buf, SARMAG) != SARMAG || strncmp(ARMAG, buf, SARMAG)) {
 134     close(fd);
 135     return;
 136   }
 137   offset = SARMAG;
 138   if (DEBUG_BINDSCAN) printf("scan archive %s\n", archive);
 139   while (read(fd, &ar_hdr, SARHDR) == SARHDR && !memcmp(ar_hdr.ar_fmag, ARFMAG, SARFMAG)) {
 140     long lar_date;
 141     long lar_size;
 142     char lar_name[256];
 143     char *dst = lar_name;
 144     /* solaris sscanf() does strlen first, so terminate somewhere */
 145     ar_hdr.ar_fmag[0] = 0;
 146     /* get date & size */
 147     sscanf(ar_hdr.ar_date, "%ld", &lar_date);
 148     sscanf(ar_hdr.ar_size, "%ld", &lar_size);
 149     /* handle solaris string table
 150      * the entry under the name // is the table, and entries with the name /nnnn refer to the table */
 151     if (ar_hdr.ar_name[0] != '/') {
 152       /* traditional archive entry names: ends at the first space, /, or null */
 153       char *src = ar_hdr.ar_name;
 154       const char *e = src+sizeof(ar_hdr.ar_name);
 155       //
 156       while (src < e && *src && *src != ' ' && *src != '/') *dst++ = *src++;
 157     } else if (ar_hdr.ar_name[1] == '/') {
 158       /* this is the "string table" entry of the symbol table,
 159        * which holds strings of filenames that are longer than
 160        * 15 characters (ie. don't fit into a ar_name) */
 161       string_table = (char *)malloc(lar_size);
 162       lseek(fd, offset+SARHDR, 0);
 163       if (read(fd, string_table, lar_size) != lar_size) printf("error reading string table\n");
 164     } else if (string_table && ar_hdr.ar_name[1] != ' ') {
 165       /* long filenames are recognized by "/nnnn" where nnnn is
 166        * the offset of the string in the string table represented
 167        * in ASCII decimals */
 168       char *src = string_table+atoi(ar_hdr.ar_name+1);
 169       while (*src != '/') *dst++ = *src++;
 170     }
 171     /* terminate lar_name */
 172     *dst = 0;
 173     /* modern (BSD4.4) long names: if the name is "#1/nnnn", then the actual name is the nnnn bytes after the header */
 174     if (!strcmp(lar_name, "#1")) {
 175       int len = atoi(ar_hdr.ar_name+3);
 176       if (read(fd, lar_name, len) != len) printf("error reading archive entry\n");
 177       lar_name[len] = 0;
 178     }
 179     /* build name and pass it on */
 180     if (lar_name[0]) {
 181       if (DEBUG_BINDSCAN) printf("archive name %s found\n", lar_name);
 182       sprintf(buf, "%s(%s)", archive, lar_name);
 183       (*func)(closure, buf, 1 /* time valid */, (time_t)lar_date);
 184     }
 185     /* Position at next member */
 186     offset += SARHDR+((lar_size+1)&(~1));
 187     lseek(fd, offset, 0);
 188   }
 189   if (string_table) free(string_table);
 190   close(fd);
 191 #endif /* NO_AR */
 192 }
 193
 194
 195 #endif /* USE_FILEUNIX */