1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Hugh Smith at The University of Guelph. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char sccsid[] = "@(#)replace.c 5.3 (Berkeley) 01/21/91"; 13 #endif /* not lint */ 14 15 #include <sys/param.h> 16 #include <sys/stat.h> 17 #include <sys/errno.h> 18 #include <fcntl.h> 19 #include <unistd.h> 20 #include <dirent.h> 21 #include <ar.h> 22 #include <stdio.h> 23 #include "archive.h" 24 25 extern CHDR chdr; /* converted header */ 26 extern char *archive; /* archive name */ 27 extern char *tname; /* temporary file "name" */ 28 29 /* 30 * replace -- 31 * Replace or add named members to archive. Entries already in the 32 * archive are swapped in place. Others are added before or after 33 * the key entry, based on the a, b and i options. If the u option 34 * is specified, modification dates select for replacement. 35 */ 36 replace(argv) 37 char **argv; 38 { 39 extern char *posname; /* positioning file name */ 40 register char *file; 41 register int afd, curfd, mods, sfd; 42 struct stat sb; 43 CF cf; 44 off_t size, tsize; 45 int err, exists, tfd1, tfd2; 46 char *rname(); 47 48 /* 49 * If doesn't exist, simply append to the archive. There's 50 * a race here, but it's pretty short, and not worth fixing. 51 */ 52 exists = !stat(archive, &sb); 53 afd = open_archive(O_CREAT|O_RDWR); 54 55 if (!exists) { 56 tfd1 = -1; 57 tfd2 = tmp(); 58 goto append; 59 } 60 61 tfd1 = tmp(); /* Files before key file. */ 62 tfd2 = tmp(); /* Files after key file. */ 63 64 /* 65 * Break archive into two parts -- entries before and after the key 66 * entry. If positioning before the key, place the key at the 67 * beginning of the after key entries and if positioning after the 68 * key, place the key at the end of the before key entries. Put it 69 * all back together at the end. 70 */ 71 mods = (options & (AR_A|AR_B)); 72 for (err = 0, curfd = tfd1; get_header(afd);) { 73 if ((file = *argv) && files(argv)) { 74 if ((sfd = open(file, O_RDONLY)) < 0) { 75 err = 1; 76 (void)fprintf(stderr, "ar: %s: %s.\n", 77 file, strerror(errno)); 78 goto useold; 79 } 80 (void)fstat(sfd, &sb); 81 if (options & AR_U && sb.st_mtime <= chdr.date) 82 goto useold; 83 84 if (options & AR_V) 85 (void)printf("r - %s\n", chdr.name); 86 87 SETCF(sfd, file, curfd, tname, WPAD); 88 put_header(&cf, &sb); 89 copyfile(&cf, sb.st_size); 90 (void)close(sfd); 91 SKIP(afd, chdr.size, archive); 92 continue; 93 } 94 95 if (mods && compare(posname)) { 96 mods = 0; 97 if (options & AR_B) 98 curfd = tfd2; 99 SETCF(afd, archive, curfd, tname, RPAD|WPAD); 100 put_header(&cf, (struct stat *)NULL); 101 copyfile(&cf, chdr.size); 102 if (options & AR_A) 103 curfd = tfd2; 104 } else { 105 useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD); 106 put_header(&cf, (struct stat *)NULL); 107 copyfile(&cf, chdr.size); 108 } 109 } 110 111 if (mods) { 112 (void)fprintf(stderr, "ar: %s: archive member not found.\n", 113 posname); 114 close_archive(afd); 115 return(1); 116 } 117 118 /* Append any left-over arguments to the end of the after file. */ 119 append: while (file = *argv++) { 120 if (options & AR_V) 121 (void)printf("a - %s\n", rname(file)); 122 if ((sfd = open(file, O_RDONLY)) < 0) { 123 err = 1; 124 (void)fprintf(stderr, "ar: %s: %s.\n", 125 file, strerror(errno)); 126 continue; 127 } 128 (void)fstat(sfd, &sb); 129 SETCF(sfd, file, 130 options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD); 131 put_header(&cf, &sb); 132 copyfile(&cf, sb.st_size); 133 (void)close(sfd); 134 } 135 136 (void)lseek(afd, (off_t)SARMAG, SEEK_SET); 137 138 SETCF(tfd1, tname, afd, archive, 0); 139 if (tfd1 != -1) { 140 tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR); 141 (void)lseek(tfd1, (off_t)0, SEEK_SET); 142 copyfile(&cf, size); 143 } else 144 tsize = 0; 145 146 tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR); 147 (void)lseek(tfd2, (off_t)0, SEEK_SET); 148 cf.rfd = tfd2; 149 copyfile(&cf, size); 150 151 (void)ftruncate(afd, tsize + SARMAG); 152 close_archive(afd); 153 return(err); 154 } 155