/* Get line. Remove trailing /n */
char *bb_get_chomped_line_from_file(FILE * file)
{
int i;
char *c = bb_get_chunk_from_file(file, &i);
if (i && c[--i] == '\n')
c[i] = 0;
return c;
}
/* Get line. Remove trailing \n */
char *xmalloc_getline(FILE *file)
{
int i;
char *c = bb_get_chunk_from_file(file, &i);
if (i && c[--i] == '\n')
c[i] = '\0';
return c;
}
static char *get_next_line(char *gets_char)
{
char *temp = NULL;
int len;
char gc;
flush_append();
/* will be returned if last line in the file
* doesn't end with either '\n' or '\0' */
gc = NO_EOL_CHAR;
while (G.current_input_file < G.input_file_count) {
FILE *fp = G.input_file_list[G.current_input_file];
/* Read line up to a newline or NUL byte, inclusive,
* return malloc'ed char[]. length of the chunk read
* is stored in len. NULL if EOF/error */
temp = bb_get_chunk_from_file(fp, &len);
if (temp) {
/* len > 0 here, it's ok to do temp[len-1] */
char c = temp[len-1];
if (c == '\n' || c == '\0') {
temp[len-1] = '\0';
gc = c;
if (c == '\0') {
int ch = fgetc(fp);
if (ch != EOF)
ungetc(ch, fp);
else
gc = LAST_IS_NUL;
}
}
/* else we put NO_EOL_CHAR into *gets_char */
break;
/* NB: I had the idea of peeking next file(s) and returning
* NO_EOL_CHAR only if it is the *last* non-empty
* input file. But there is a case where this won't work:
* file1: "a woo\nb woo"
* file2: "c no\nd no"
* sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang"
* (note: *no* newline after "b bang"!) */
}
/* Close this file and advance to next one */
fclose(fp);
G.current_input_file++;
}
*gets_char = gc;
return temp;
}
/* Get line, including trailing \n if any */
char *xmalloc_fgets(FILE *file)
{
int i;
return bb_get_chunk_from_file(file, &i);
}
/* Get next line of input from G.input_file_list, flushing append buffer and
* noting if we ran out of files without a newline on the last line we read.
*/
static char *get_next_line(char *gets_char, char *last_puts_char)
{
char *temp = NULL;
size_t len;
char gc;
flush_append(last_puts_char);
/* will be returned if last line in the file
* doesn't end with either '\n' or '\0' */
gc = NO_EOL_CHAR;
for (; G.current_input_file <= G.last_input_file; G.current_input_file++) {
FILE *fp = G.current_fp;
if (!fp) {
const char *path = G.input_file_list[G.current_input_file];
fp = stdin;
if (path != bb_msg_standard_input) {
fp = fopen_or_warn(path, "r");
if (!fp) {
G.exitcode = EXIT_FAILURE;
continue;
}
}
G.current_fp = fp;
}
/* Read line up to a newline or NUL byte, inclusive,
* return malloc'ed char[]. length of the chunk read
* is stored in len. NULL if EOF/error */
temp = bb_get_chunk_from_file(fp, &len);
if (temp) {
/* len > 0 here, it's ok to do temp[len-1] */
char c = temp[len-1];
if (c == '\n' || c == '\0') {
temp[len-1] = '\0';
gc = c;
if (c == '\0') {
int ch = fgetc(fp);
if (ch != EOF)
ungetc(ch, fp);
else
gc = LAST_IS_NUL;
}
}
/* else we put NO_EOL_CHAR into *gets_char */
break;
/* NB: I had the idea of peeking next file(s) and returning
* NO_EOL_CHAR only if it is the *last* non-empty
* input file. But there is a case where this won't work:
* file1: "a woo\nb woo"
* file2: "c no\nd no"
* sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang"
* (note: *no* newline after "b bang"!) */
}
/* Close this file and advance to next one */
fclose_if_not_stdin(fp);
G.current_fp = NULL;
}
*gets_char = gc;
return temp;
}
/* Return value will become exit code.
* It's ok to exit instead of return. */
static NOINLINE int cpio_o(void)
{
static const char trailer[] ALIGN1 = "TRAILER!!!";
struct name_s {
struct name_s *next;
char name[1];
};
struct inodes_s {
struct inodes_s *next;
struct name_s *names;
struct stat st;
};
struct inodes_s *links = NULL;
off_t bytes = 0; /* output bytes count */
while (1) {
const char *name;
char *line;
struct stat st;
line = (option_mask32 & CPIO_OPT_NUL_TERMINATED)
? bb_get_chunk_from_file(stdin, NULL)
: xmalloc_fgetline(stdin);
if (line) {
/* Strip leading "./[./]..." from the filename */
name = line;
while (name[0] == '.' && name[1] == '/') {
while (*++name == '/')
continue;
}
if (!*name) { /* line is empty */
free(line);
continue;
}
if ((option_mask32 & CPIO_OPT_DEREF)
? stat(name, &st)
: lstat(name, &st)
) {
abort_cpio_o:
bb_simple_perror_msg_and_die(name);
}
if (!(S_ISLNK(st.st_mode) || S_ISREG(st.st_mode)))
st.st_size = 0; /* paranoia */
/* Store hardlinks for later processing, dont output them */
if (!S_ISDIR(st.st_mode) && st.st_nlink > 1) {
struct name_s *n;
struct inodes_s *l;
/* Do we have this hardlink remembered? */
l = links;
while (1) {
if (l == NULL) {
/* Not found: add new item to "links" list */
l = xzalloc(sizeof(*l));
l->st = st;
l->next = links;
links = l;
break;
}
if (l->st.st_ino == st.st_ino) {
/* found */
break;
}
l = l->next;
}
/* Add new name to "l->names" list */
n = xmalloc(sizeof(*n) + strlen(name));
strcpy(n->name, name);
n->next = l->names;
l->names = n;
free(line);
continue;
}
} else { /* line == NULL: EOF */
next_link:
if (links) {
/* Output hardlink's data */
st = links->st;
name = links->names->name;
links->names = links->names->next;
/* GNU cpio is reported to emit file data
* only for the last instance. Mimic that. */
if (links->names == NULL)
links = links->next;
else
st.st_size = 0;
/* NB: we leak links->names and/or links,
* this is intended (we exit soon anyway) */
} else {
/* If no (more) hardlinks to output,
* output "trailer" entry */
name = trailer;
/* st.st_size == 0 is a must, but for uniformity
* in the output, we zero out everything */
memset(&st, 0, sizeof(st));
/* st.st_nlink = 1; - GNU cpio does this */
}
}
bytes += printf("070701"
"%08X%08X%08X%08X%08X%08X%08X"
"%08X%08X%08X%08X" /* GNU cpio uses uppercase hex */
/* strlen+1: */ "%08X"
/* chksum: */ "00000000" /* (only for "070702" files) */
/* name,NUL: */ "%s%c",
(unsigned)(uint32_t) st.st_ino,
(unsigned)(uint32_t) st.st_mode,
(unsigned)(uint32_t) st.st_uid,
(unsigned)(uint32_t) st.st_gid,
(unsigned)(uint32_t) st.st_nlink,
(unsigned)(uint32_t) st.st_mtime,
(unsigned)(uint32_t) st.st_size,
(unsigned)(uint32_t) major(st.st_dev),
(unsigned)(uint32_t) minor(st.st_dev),
(unsigned)(uint32_t) major(st.st_rdev),
(unsigned)(uint32_t) minor(st.st_rdev),
(unsigned)(strlen(name) + 1),
name, '\0');
bytes = cpio_pad4(bytes);
if (st.st_size) {
if (S_ISLNK(st.st_mode)) {
char *lpath = xmalloc_readlink_or_warn(name);
if (!lpath)
goto abort_cpio_o;
bytes += printf("%s", lpath);
free(lpath);
} else { /* S_ISREG */
int fd = xopen(name, O_RDONLY);
fflush_all();
/* We must abort if file got shorter too! */
bb_copyfd_exact_size(fd, STDOUT_FILENO, st.st_size);
bytes += st.st_size;
close(fd);
}
bytes = cpio_pad4(bytes);
}
if (!line) {
if (name != trailer)
goto next_link;
/* TODO: GNU cpio pads trailer to 512 bytes, do we want that? */
return EXIT_SUCCESS;
}
free(line);
} /* end of "while (1)" */
}
/* Get line, including trailing /n if any */
char *bb_get_line_from_file(FILE * file)
{
int i;
return bb_get_chunk_from_file(file, &i);
}
