toybox: toys/posix/cpio.c annotate

annotate toys/posix/cpio.c @ 1229:34d4ee60e78f draft

Promote cpio out of pending. After some waffling I put it in "posix", even though it was last specified in susv2 (where it was the obsolete 6 byte header entries predating susv4). LSB specifies it, including the 8 byte header fields, but for the actual command it just references SUSv2. (LSB isn't so much a standard as Red Hat's "notes to self".)

author	Rob Landley <rob@landley.net>
date	Tue, 25 Mar 2014 07:35:56 -0500
parents	toys/pending/cpio.c@2366f9d73745
children	c78ffc6c330a

rev	line source
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	1 /* cpio.c - a basic cpio
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	2 *
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	3 * Written 2013 AD by Isaac Dunham; this code is placed under the
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	4 * same license as toybox or as CC0, at your option.
1121 977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	5 *
977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	6 * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/cpio.html
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	7 * and http://pubs.opengroup.org/onlinepubs/7908799/xcu/cpio.html
1121 977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	8 *
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	9 * Yes, that's SUSv2, the newer standards removed it around the time RPM
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	10 * and initramfs started heavily using this archive format.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	11 *
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	12 * Modern cpio expanded header to 110 bytes (first field 6 bytes, rest are 8).
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	13 * In order: magic ino mode uid gid nlink mtime filesize devmajor devminor
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	14 * rdevmajor rdevminor namesize check
1121 977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	15
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	16 USE_CPIO(NEWTOY(cpio, "duH:i\|t\|F:o\|v(verbose)[!io][!ot]", TOYFLAG_BIN))
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	17
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	18 config CPIO
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	19 bool "cpio"
1229 34d4ee60e78f Promote cpio out of pending. Rob Landley <rob@landley.net> parents: 1228 diff changeset	20 default y
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	21 help
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	22 usage: cpio -{o\|t\|i} [-v] [--verbose] [-F FILE] [ignored: -du -H newc]
1221 8451065c5a19 Cleanup cpio: fiddle with help text, make option parsing require/exclude -iot combinations, move loopfiles_stdin() down after write_cpio_member() so we can hardwire it instead of using a function pointer that only ever has one value. Rob Landley <rob@landley.net> parents: 1220 diff changeset	23
8451065c5a19 Cleanup cpio: fiddle with help text, make option parsing require/exclude -iot combinations, move loopfiles_stdin() down after write_cpio_member() so we can hardwire it instead of using a function pointer that only ever has one value. Rob Landley <rob@landley.net> parents: 1220 diff changeset	24 copy files into and out of a "newc" format cpio archive
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	25
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	26 -F FILE use archive FILE instead of stdin/stdout
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	27 -i extract from archive into file system (stdin=archive)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	28 -o create archive (stdin=list of files, stdout=archive)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	29 -t test files (list only, stdin=archive, stdout=list of files)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	30 -v verbose (list files during create/extract)
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	31 */
1135 581c35250cff Minor drive-by cleanups to cpio. Whitespace, curly brackets, replace %4 with &3, turn a switch/case into if/else. Rob Landley <rob@landley.net> parents: 1121 diff changeset	32
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	33 #define FOR_cpio
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	34 #include "toys.h"
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	35
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	36 GLOBALS(
1135 581c35250cff Minor drive-by cleanups to cpio. Whitespace, curly brackets, replace %4 with &3, turn a switch/case into if/else. Rob Landley <rob@landley.net> parents: 1121 diff changeset	37 char *archive;
581c35250cff Minor drive-by cleanups to cpio. Whitespace, curly brackets, replace %4 with &3, turn a switch/case into if/else. Rob Landley <rob@landley.net> parents: 1121 diff changeset	38 char *fmt;
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	39 )
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	40
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	41 // Read strings, tail padded to 4 byte alignment. Argument "align" is amount
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	42 // by which start of string isn't aligned (usually 0).
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	43 static char *strpad(int fd, unsigned len, unsigned align)
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	44 {
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	45 char *str;
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	46
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	47 align = (align + len) & 3;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	48 if (align) len += (4-align);
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	49
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	50 xreadall(fd, str = xmalloc(len+1), len);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	51 str[len]=0; // redundant, in case archive is bad
1221 8451065c5a19 Cleanup cpio: fiddle with help text, make option parsing require/exclude -iot combinations, move loopfiles_stdin() down after write_cpio_member() so we can hardwire it instead of using a function pointer that only ever has one value. Rob Landley <rob@landley.net> parents: 1220 diff changeset	52
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	53 return str;
1221 8451065c5a19 Cleanup cpio: fiddle with help text, make option parsing require/exclude -iot combinations, move loopfiles_stdin() down after write_cpio_member() so we can hardwire it instead of using a function pointer that only ever has one value. Rob Landley <rob@landley.net> parents: 1220 diff changeset	54 }
8451065c5a19 Cleanup cpio: fiddle with help text, make option parsing require/exclude -iot combinations, move loopfiles_stdin() down after write_cpio_member() so we can hardwire it instead of using a function pointer that only ever has one value. Rob Landley <rob@landley.net> parents: 1220 diff changeset	55
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	56 //convert hex to uint; mostly to allow using bits of non-terminated strings
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	57 unsigned x8u(char *hex)
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	58 {
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	59 unsigned val, inpos = 8, outpos;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	60 char pattern[6];
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	61
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	62 while (*hex == '0') {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	63 hex++;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	64 if (!--inpos) return 0;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	65 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	66 // Because scanf gratuitously treats %*X differently than printf does.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	67 sprintf(pattern, "%%%dX%%n", inpos);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	68 sscanf(hex, pattern, &val, &outpos);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	69 if (inpos != outpos) error_exit("bad header");
1220 10d4dd6621cb Patch from Isaac Dunham to add cpio -d, with a few tweaks by me. Rob Landley <rob@landley.net> parents: 1135 diff changeset	70
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	71 return val;
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	72 }
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	73
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	74 void cpio_main(void)
b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	75 {
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	76 int afd;
1223 a7d5b93111a5 Next round of cpio cleanup. Rob Landley <rob@landley.net> parents: 1222 diff changeset	77
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	78 // Subtle bit: FLAG_o is 1 so we can just use it to select stdin/stdout.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	79
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	80 afd = toys.optflags & FLAG_o;
1121 977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	81 if (TT.archive) {
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	82 int perm = (toys.optflags & FLAG_o) ? O_CREAT\|O_WRONLY\|O_TRUNC : O_RDONLY;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	83
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	84 afd = xcreate(TT.archive, perm, 0644);
1121 977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	85 }
977f0a4dc562 Support -F, and ignore -u since that's what we do anyway. Isaac Dunham <ibid.ag@gmail.com> parents: 1098 diff changeset	86
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	87 // read cpio archive
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	88
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	89 if (toys.optflags & (FLAG_i\|FLAG_t)) for (;;) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	90 char name, tofree, *data;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	91 unsigned size, mode;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	92 int test = toys.optflags & FLAG_t, err = 0;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	93
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	94 // Read header and name.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	95 xreadall(afd, toybuf, 110);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	96 tofree = name = strpad(afd, x8u(toybuf+94), 110);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	97 if (!strcmp("TRAILER!!!", name)) break;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	98
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	99 // If you want to extract absolute paths, "cd /" and run cpio.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	100 while (*name == '/') name++;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	101
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	102 // Align to 4 bytes. Note header is 110 bytes which is 2 bytes over.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	103
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	104 size = x8u(toybuf+54);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	105 mode = x8u(toybuf+14);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	106
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	107 if (toys.optflags & (FLAG_t\|FLAG_v)) puts(name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	108
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	109 if (!test && strrchr(name, '/') && mkpathat(AT_FDCWD, name, 0, 2)) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	110 perror_msg("mkpath '%s'", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	111 test++;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	112 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	113
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	114 // Consume entire record even if it couldn't create file, so we're
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	115 // properly aligned with next file.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	116
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	117 if (S_ISDIR(mode)) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	118 if (!test) err = mkdir(name, mode);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	119 } else if (S_ISLNK(mode)) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	120 data = strpad(afd, size, 0);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	121 if (!test) err = symlink(data, name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	122 } else if (S_ISREG(mode)) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	123 int fd;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	124
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	125 // If write fails, we still need to read/discard data to continue with
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	126 // archive. Since doing so overwrites errno, report error now
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	127 fd = test ? 0 : open(name, O_CREAT\|O_WRONLY\|O_TRUNC\|O_NOFOLLOW, mode);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	128 if (fd < 0) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	129 perror_msg("create %s", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	130 test++;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	131 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	132
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	133 data = toybuf;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	134 while (size) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	135 if (size < sizeof(toybuf)) data = strpad(afd, size, 0);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	136 else xreadall(afd, toybuf, sizeof(toybuf));
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	137 if (!test) xwrite(fd, data, data == toybuf ? sizeof(toybuf) : size);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	138 if (data != toybuf) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	139 free(data);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	140 break;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	141 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	142 size -= sizeof(toybuf);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	143 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	144 close(fd);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	145 } else if (!test)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	146 err = mknod(name, mode, makedev(x8u(toybuf+62), x8u(toybuf+70)));
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	147
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	148 if (err<0) perror_msg("create '%s'", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	149 free(tofree);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	150
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	151 // Output cpio archive
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	152
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	153 } else {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	154 char *name = 0;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	155 size_t size = 0;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	156
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	157 for (;;) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	158 struct stat st;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	159 unsigned nlen = strlen(name)+1, error = 0, zero = 0;
1228 2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	160 int len, fd = -1;
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	161 ssize_t llen;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	162
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	163 len = getline(&name, &size, stdin);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	164 if (len<1) break;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	165 if (name[len-1] == '\n') name[--len] = 0;
1228 2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	166 if (lstat(name, &st)
2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	167 \|\| (S_ISREG(st.st_mode) && (fd = open(name, O_RDONLY))<0))
2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	168 {
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	169 perror_msg("%s", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	170 continue;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	171 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	172
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	173 if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) st.st_size = 0;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	174 if (st.st_size >> 32) perror_msg("skipping >2G file '%s'", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	175 else {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	176 llen = sprintf(toybuf,
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	177 "070701%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X",
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	178 (int)st.st_ino, st.st_mode, st.st_uid, st.st_gid, (int)st.st_nlink,
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	179 (int)st.st_mtime, (int)st.st_size, major(st.st_dev),
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	180 minor(st.st_dev), major(st.st_rdev), minor(st.st_rdev), nlen, 0);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	181 xwrite(afd, toybuf, llen);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	182 xwrite(afd, name, nlen);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	183
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	184 // NUL Pad header up to 4 multiple bytes.
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	185 llen = (llen + nlen) & 3;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	186 if (llen) xwrite(afd, &zero, 4-llen);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	187
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	188 // Write out body for symlink or regular file
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	189 llen = st.st_size;
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	190 if (S_ISLNK(st.st_mode)) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	191 if (readlink(name, toybuf, sizeof(toybuf)-1) == llen)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	192 xwrite(afd, toybuf, llen);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	193 else perror_msg("readlink '%s'", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	194 } else while (llen) {
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	195 nlen = llen > sizeof(toybuf) ? sizeof(toybuf) : llen;
1228 2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	196 llen -= nlen;
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	197 // If read fails, write anyway (already wrote size in header)
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	198 if (nlen != readall(fd, toybuf, nlen))
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	199 if (!error++) perror_msg("bad read from file '%s'", name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	200 xwrite(afd, toybuf, nlen);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	201 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	202 llen = st.st_size & 3;
1228 2366f9d73745 Several cpio bugfixes spotted by Isaac Dunham. Rob Landley <rob@landley.net> parents: 1227 diff changeset	203 if (llen) write(afd, &zero, 4-llen);
1227 903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	204 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	205 close(fd);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	206 }
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	207 free(name);
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	208
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	209 xwrite(afd, toybuf,
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	210 sprintf(toybuf, "070701%040X%056X%08XTRAILER!!!%c%c%c",
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	211 1, 0x0b, 0, 0, 0, 0));
903acf85bd1d Most of the remaining cpio cleanup. Rob Landley <rob@landley.net> parents: 1223 diff changeset	212 }
1087 b73a61542297 I've finally gotten 'cpio' into a shape where it could be useable. Isaac Dunham <ibid.ag@gmail.com> parents: diff changeset	213 }

Mercurial > hg > toybox

annotate toys/posix/cpio.c @ 1229:34d4ee60e78f draft