2001-03-16 22:47:14 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
|
|
|
/*
|
|
|
|
* Utility routines.
|
|
|
|
*
|
2004-03-15 08:29:22 +00:00
|
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
2006-08-03 15:41:12 +00:00
|
|
|
* Copyright (C) 2006 Rob Landley
|
|
|
|
* Copyright (C) 2006 Denis Vlasenko
|
2001-03-16 22:47:14 +00:00
|
|
|
*
|
2006-09-20 22:06:01 +00:00
|
|
|
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
|
2001-03-16 22:47:14 +00:00
|
|
|
*/
|
|
|
|
|
2007-05-26 19:00:18 +00:00
|
|
|
#include "libbb.h"
|
2001-03-16 22:47:14 +00:00
|
|
|
|
2006-08-04 20:20:03 +00:00
|
|
|
/* All the functions starting with "x" call bb_error_msg_and_die() if they
|
|
|
|
* fail, so callers never need to check for errors. If it returned, it
|
|
|
|
* succeeded. */
|
|
|
|
|
2001-03-16 22:47:14 +00:00
|
|
|
#ifndef DMALLOC
|
2006-08-28 23:31:54 +00:00
|
|
|
/* dmalloc provides variants of these that do abort() on failure.
|
|
|
|
* Since dmalloc's prototypes overwrite the impls here as they are
|
|
|
|
* included after these prototypes in libbb.h, all is well.
|
|
|
|
*/
|
2007-04-10 21:40:19 +00:00
|
|
|
// Warn if we can't allocate size bytes of memory.
|
|
|
|
void *malloc_or_warn(size_t size)
|
|
|
|
{
|
|
|
|
void *ptr = malloc(size);
|
|
|
|
if (ptr == NULL && size != 0)
|
|
|
|
bb_error_msg(bb_msg_memory_exhausted);
|
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't allocate size bytes of memory.
|
2006-03-06 20:47:33 +00:00
|
|
|
void *xmalloc(size_t size)
|
2001-03-16 22:47:14 +00:00
|
|
|
{
|
|
|
|
void *ptr = malloc(size);
|
2002-02-26 15:28:22 +00:00
|
|
|
if (ptr == NULL && size != 0)
|
2003-03-19 09:13:01 +00:00
|
|
|
bb_error_msg_and_die(bb_msg_memory_exhausted);
|
2001-03-16 22:47:14 +00:00
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't resize previously allocated memory. (This returns a pointer
|
|
|
|
// to the new memory, which may or may not be the same as the old memory.
|
|
|
|
// It'll copy the contents to a new chunk and free the old one if necessary.)
|
2006-03-06 20:47:33 +00:00
|
|
|
void *xrealloc(void *ptr, size_t size)
|
2001-03-16 22:47:14 +00:00
|
|
|
{
|
2002-02-26 15:28:22 +00:00
|
|
|
ptr = realloc(ptr, size);
|
|
|
|
if (ptr == NULL && size != 0)
|
2003-03-19 09:13:01 +00:00
|
|
|
bb_error_msg_and_die(bb_msg_memory_exhausted);
|
2001-03-16 22:47:14 +00:00
|
|
|
return ptr;
|
|
|
|
}
|
2006-08-28 23:31:54 +00:00
|
|
|
#endif /* DMALLOC */
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't allocate and zero size bytes of memory.
|
2006-05-19 20:36:49 +00:00
|
|
|
void *xzalloc(size_t size)
|
|
|
|
{
|
|
|
|
void *ptr = xmalloc(size);
|
|
|
|
memset(ptr, 0, size);
|
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't copy a string to freshly allocated memory.
|
2006-08-04 20:20:03 +00:00
|
|
|
char * xstrdup(const char *s)
|
2006-03-14 21:45:38 +00:00
|
|
|
{
|
2001-03-16 22:47:14 +00:00
|
|
|
char *t;
|
|
|
|
|
|
|
|
if (s == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
2006-11-26 15:45:17 +00:00
|
|
|
t = strdup(s);
|
2001-03-16 22:47:14 +00:00
|
|
|
|
|
|
|
if (t == NULL)
|
2003-03-19 09:13:01 +00:00
|
|
|
bb_error_msg_and_die(bb_msg_memory_exhausted);
|
2001-03-16 22:47:14 +00:00
|
|
|
|
|
|
|
return t;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't allocate n+1 bytes (space for the null terminator) and copy
|
|
|
|
// the (possibly truncated to length n) string into it.
|
2006-08-04 20:20:03 +00:00
|
|
|
char * xstrndup(const char *s, int n)
|
2006-03-14 21:45:38 +00:00
|
|
|
{
|
2006-11-26 15:45:17 +00:00
|
|
|
int m;
|
2001-03-16 22:47:14 +00:00
|
|
|
char *t;
|
|
|
|
|
2006-06-30 16:36:56 +00:00
|
|
|
if (ENABLE_DEBUG && s == NULL)
|
2006-08-03 15:41:12 +00:00
|
|
|
bb_error_msg_and_die("xstrndup bug");
|
2001-03-16 22:47:14 +00:00
|
|
|
|
2006-11-26 15:45:17 +00:00
|
|
|
/* We can just xmalloc(n+1) and strncpy into it, */
|
|
|
|
/* but think about xstrndup("abc", 10000) wastage! */
|
|
|
|
m = n;
|
|
|
|
t = (char*) s;
|
|
|
|
while (m) {
|
|
|
|
if (!*t) break;
|
2007-01-24 22:02:01 +00:00
|
|
|
m--;
|
|
|
|
t++;
|
2006-11-26 15:45:17 +00:00
|
|
|
}
|
2007-01-24 22:02:01 +00:00
|
|
|
n -= m;
|
2006-11-26 15:45:17 +00:00
|
|
|
t = xmalloc(n + 1);
|
|
|
|
t[n] = '\0';
|
2004-03-15 08:29:22 +00:00
|
|
|
|
2007-01-24 22:02:01 +00:00
|
|
|
return memcpy(t, s, n);
|
2001-03-16 22:47:14 +00:00
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't open a file and return a FILE * to it.
|
|
|
|
// Notice we haven't got xfread(), This is for use with fscanf() and friends.
|
2006-08-03 15:41:12 +00:00
|
|
|
FILE *xfopen(const char *path, const char *mode)
|
2001-03-16 22:47:14 +00:00
|
|
|
{
|
2006-11-26 15:45:17 +00:00
|
|
|
FILE *fp = fopen(path, mode);
|
|
|
|
if (fp == NULL)
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg_and_die("can't open '%s'", path);
|
2001-03-16 22:47:14 +00:00
|
|
|
return fp;
|
|
|
|
}
|
|
|
|
|
2007-04-11 23:20:53 +00:00
|
|
|
// Die if we can't open a file and return a fd.
|
|
|
|
int xopen3(const char *pathname, int flags, int mode)
|
2006-04-13 12:45:04 +00:00
|
|
|
{
|
2007-04-11 23:20:53 +00:00
|
|
|
int ret;
|
2006-08-04 20:20:03 +00:00
|
|
|
|
2007-04-11 23:20:53 +00:00
|
|
|
ret = open(pathname, flags, mode);
|
|
|
|
if (ret < 0) {
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg_and_die("can't open '%s'", pathname);
|
2007-04-11 23:20:53 +00:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Die if we can't open an existing file and return a fd.
|
|
|
|
int xopen(const char *pathname, int flags)
|
|
|
|
{
|
2006-10-14 02:23:43 +00:00
|
|
|
return xopen3(pathname, flags, 0666);
|
2006-04-13 12:45:04 +00:00
|
|
|
}
|
|
|
|
|
2007-04-11 23:20:53 +00:00
|
|
|
// Warn if we can't open a file and return a fd.
|
|
|
|
int open3_or_warn(const char *pathname, int flags, int mode)
|
2002-09-25 02:47:48 +00:00
|
|
|
{
|
|
|
|
int ret;
|
2004-03-15 08:29:22 +00:00
|
|
|
|
2006-04-13 12:45:04 +00:00
|
|
|
ret = open(pathname, flags, mode);
|
|
|
|
if (ret < 0) {
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg("can't open '%s'", pathname);
|
2002-09-25 02:47:48 +00:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2007-04-11 23:20:53 +00:00
|
|
|
// Warn if we can't open a file and return a fd.
|
|
|
|
int open_or_warn(const char *pathname, int flags)
|
|
|
|
{
|
|
|
|
return open3_or_warn(pathname, flags, 0666);
|
|
|
|
}
|
|
|
|
|
2007-05-26 16:44:20 +00:00
|
|
|
void xpipe(int filedes[2])
|
|
|
|
{
|
|
|
|
if (pipe(filedes))
|
|
|
|
bb_perror_msg_and_die("can't create pipe");
|
|
|
|
}
|
|
|
|
|
2007-04-05 21:25:15 +00:00
|
|
|
void xunlink(const char *pathname)
|
|
|
|
{
|
|
|
|
if (unlink(pathname))
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg_and_die("can't remove file '%s'", pathname);
|
2007-04-05 21:25:15 +00:00
|
|
|
}
|
|
|
|
|
2006-11-22 15:54:52 +00:00
|
|
|
// Turn on nonblocking I/O on a fd
|
|
|
|
int ndelay_on(int fd)
|
|
|
|
{
|
2007-05-26 16:44:20 +00:00
|
|
|
return fcntl(fd, F_SETFL, fcntl(fd,F_GETFL,0) | O_NONBLOCK);
|
2006-11-22 15:54:52 +00:00
|
|
|
}
|
|
|
|
|
2006-12-24 07:15:50 +00:00
|
|
|
int ndelay_off(int fd)
|
|
|
|
{
|
2007-05-26 16:44:20 +00:00
|
|
|
return fcntl(fd, F_SETFL, fcntl(fd,F_GETFL,0) & ~O_NONBLOCK);
|
2006-12-24 07:15:50 +00:00
|
|
|
}
|
|
|
|
|
2007-03-25 23:21:05 +00:00
|
|
|
// "Renumber" opened fd
|
|
|
|
void xmove_fd(int from, int to)
|
|
|
|
{
|
|
|
|
if (from == to)
|
|
|
|
return;
|
|
|
|
if (dup2(from, to) != to)
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg_and_die("can't duplicate file descriptor");
|
2007-03-25 23:21:05 +00:00
|
|
|
close(from);
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't write the entire buffer.
|
2006-11-25 23:50:28 +00:00
|
|
|
void xwrite(int fd, const void *buf, size_t count)
|
2006-07-16 08:14:35 +00:00
|
|
|
{
|
2006-10-12 22:44:13 +00:00
|
|
|
if (count) {
|
|
|
|
ssize_t size = full_write(fd, buf, count);
|
|
|
|
if (size != count)
|
2006-10-11 20:59:02 +00:00
|
|
|
bb_error_msg_and_die("short write");
|
2002-09-25 02:47:48 +00:00
|
|
|
}
|
2006-07-16 08:14:35 +00:00
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't lseek to the right spot.
|
2006-10-14 02:23:43 +00:00
|
|
|
off_t xlseek(int fd, off_t offset, int whence)
|
2006-07-16 08:14:35 +00:00
|
|
|
{
|
2006-10-14 02:23:43 +00:00
|
|
|
off_t off = lseek(fd, offset, whence);
|
2006-11-29 18:15:52 +00:00
|
|
|
if (off == (off_t)-1) {
|
|
|
|
if (whence == SEEK_SET)
|
|
|
|
bb_perror_msg_and_die("lseek(%"OFF_FMT"u)", offset);
|
2006-10-14 02:23:43 +00:00
|
|
|
bb_perror_msg_and_die("lseek");
|
2006-11-29 18:15:52 +00:00
|
|
|
}
|
2006-10-14 02:23:43 +00:00
|
|
|
return off;
|
2002-09-25 02:47:48 +00:00
|
|
|
}
|
2003-03-19 09:13:01 +00:00
|
|
|
|
2006-11-26 15:45:17 +00:00
|
|
|
// Die with supplied filename if this FILE * has ferror set.
|
2006-10-26 23:21:47 +00:00
|
|
|
void die_if_ferror(FILE *fp, const char *fn)
|
2003-03-19 09:13:01 +00:00
|
|
|
{
|
|
|
|
if (ferror(fp)) {
|
2007-05-26 16:44:20 +00:00
|
|
|
/* ferror doesn't set useful errno */
|
2006-11-25 23:50:28 +00:00
|
|
|
bb_error_msg_and_die("%s: I/O error", fn);
|
2003-03-19 09:13:01 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if stdout has ferror set.
|
2006-10-26 23:21:47 +00:00
|
|
|
void die_if_ferror_stdout(void)
|
2003-03-19 09:13:01 +00:00
|
|
|
{
|
2006-10-26 23:21:47 +00:00
|
|
|
die_if_ferror(stdout, bb_msg_standard_output);
|
2003-03-19 09:13:01 +00:00
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we have trouble flushing stdout.
|
2006-08-03 15:41:12 +00:00
|
|
|
void xfflush_stdout(void)
|
2003-03-19 09:13:01 +00:00
|
|
|
{
|
|
|
|
if (fflush(stdout)) {
|
|
|
|
bb_perror_msg_and_die(bb_msg_standard_output);
|
|
|
|
}
|
|
|
|
}
|
2006-05-25 23:02:40 +00:00
|
|
|
|
2007-04-01 01:18:20 +00:00
|
|
|
void sig_block(int sig)
|
|
|
|
{
|
|
|
|
sigset_t ss;
|
|
|
|
sigemptyset(&ss);
|
|
|
|
sigaddset(&ss, sig);
|
|
|
|
sigprocmask(SIG_BLOCK, &ss, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void sig_unblock(int sig)
|
|
|
|
{
|
|
|
|
sigset_t ss;
|
|
|
|
sigemptyset(&ss);
|
|
|
|
sigaddset(&ss, sig);
|
|
|
|
sigprocmask(SIG_UNBLOCK, &ss, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
void sig_blocknone(void)
|
|
|
|
{
|
|
|
|
sigset_t ss;
|
|
|
|
sigemptyset(&ss);
|
|
|
|
sigprocmask(SIG_SETMASK, &ss, NULL);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void sig_catch(int sig, void (*f)(int))
|
|
|
|
{
|
|
|
|
struct sigaction sa;
|
|
|
|
sa.sa_handler = f;
|
|
|
|
sa.sa_flags = 0;
|
|
|
|
sigemptyset(&sa.sa_mask);
|
|
|
|
sigaction(sig, &sa, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void sig_pause(void)
|
|
|
|
{
|
|
|
|
sigset_t ss;
|
|
|
|
sigemptyset(&ss);
|
|
|
|
sigsuspend(&ss);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-10-03 15:57:40 +00:00
|
|
|
void xsetenv(const char *key, const char *value)
|
|
|
|
{
|
2006-10-11 20:59:02 +00:00
|
|
|
if (setenv(key, value, 1))
|
2006-10-03 15:57:40 +00:00
|
|
|
bb_error_msg_and_die(bb_msg_memory_exhausted);
|
|
|
|
}
|
|
|
|
|
2006-11-05 00:44:39 +00:00
|
|
|
// Converts unsigned long long value into compact 4-char
|
|
|
|
// representation. Examples: "1234", "1.2k", " 27M", "123T"
|
|
|
|
// Fifth char is always '\0'
|
|
|
|
void smart_ulltoa5(unsigned long long ul, char buf[5])
|
|
|
|
{
|
2007-01-29 22:51:25 +00:00
|
|
|
const char *fmt;
|
2006-11-05 00:44:39 +00:00
|
|
|
char c;
|
|
|
|
unsigned v,idx = 0;
|
|
|
|
ul *= 10;
|
|
|
|
if (ul > 9999*10) { // do not scale if 9999 or less
|
|
|
|
while (ul >= 10000) {
|
|
|
|
ul /= 1024;
|
|
|
|
idx++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
v = ul; // ullong divisions are expensive, avoid them
|
|
|
|
|
|
|
|
fmt = " 123456789";
|
|
|
|
if (!idx) { // 9999 or less: use 1234 format
|
|
|
|
c = buf[0] = " 123456789"[v/10000];
|
2007-03-24 12:08:36 +00:00
|
|
|
if (c != ' ') fmt = "0123456789";
|
2006-11-05 00:44:39 +00:00
|
|
|
c = buf[1] = fmt[v/1000%10];
|
2007-03-24 12:08:36 +00:00
|
|
|
if (c != ' ') fmt = "0123456789";
|
2006-11-05 00:44:39 +00:00
|
|
|
buf[2] = fmt[v/100%10];
|
|
|
|
buf[3] = "0123456789"[v/10%10];
|
|
|
|
} else {
|
2007-03-24 12:08:36 +00:00
|
|
|
if (v >= 10*10) { // scaled value is >=10: use 123M format
|
2006-11-05 00:44:39 +00:00
|
|
|
c = buf[0] = " 123456789"[v/1000];
|
2007-03-24 12:08:36 +00:00
|
|
|
if (c != ' ') fmt = "0123456789";
|
2006-11-05 00:44:39 +00:00
|
|
|
buf[1] = fmt[v/100%10];
|
|
|
|
buf[2] = "0123456789"[v/10%10];
|
|
|
|
} else { // scaled value is <10: use 1.2M format
|
|
|
|
buf[0] = "0123456789"[v/10];
|
|
|
|
buf[1] = '.';
|
|
|
|
buf[2] = "0123456789"[v%10];
|
|
|
|
}
|
|
|
|
// see http://en.wikipedia.org/wiki/Tera
|
|
|
|
buf[3] = " kMGTPEZY"[idx];
|
|
|
|
}
|
|
|
|
buf[4] = '\0';
|
|
|
|
}
|
|
|
|
|
2007-03-28 21:57:12 +00:00
|
|
|
// Convert unsigned integer to ascii, writing into supplied buffer.
|
|
|
|
// A truncated result contains the first few digits of the result ala strncpy.
|
|
|
|
// Returns a pointer past last generated digit, does _not_ store NUL.
|
2006-11-05 00:44:39 +00:00
|
|
|
void BUG_sizeof_unsigned_not_4(void);
|
2007-03-27 22:01:31 +00:00
|
|
|
char *utoa_to_buf(unsigned n, char *buf, unsigned buflen)
|
2006-07-10 07:41:34 +00:00
|
|
|
{
|
2006-11-05 00:44:39 +00:00
|
|
|
unsigned i, out, res;
|
|
|
|
if (sizeof(unsigned) != 4)
|
|
|
|
BUG_sizeof_unsigned_not_4();
|
2006-07-11 00:44:36 +00:00
|
|
|
if (buflen) {
|
2006-11-05 00:44:39 +00:00
|
|
|
out = 0;
|
|
|
|
for (i = 1000000000; i; i /= 10) {
|
|
|
|
res = n / i;
|
|
|
|
if (res || out || i == 1) {
|
|
|
|
if (!--buflen) break;
|
2006-07-11 00:44:36 +00:00
|
|
|
out++;
|
|
|
|
n -= res*i;
|
|
|
|
*buf++ = '0' + res;
|
|
|
|
}
|
2006-07-10 07:41:34 +00:00
|
|
|
}
|
|
|
|
}
|
2007-03-27 22:01:31 +00:00
|
|
|
return buf;
|
2006-07-10 07:41:34 +00:00
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Convert signed integer to ascii, like utoa_to_buf()
|
2007-03-27 22:01:31 +00:00
|
|
|
char *itoa_to_buf(int n, char *buf, unsigned buflen)
|
2006-07-10 07:41:34 +00:00
|
|
|
{
|
2006-07-11 00:44:36 +00:00
|
|
|
if (buflen && n<0) {
|
2006-07-10 07:41:34 +00:00
|
|
|
n = -n;
|
|
|
|
*buf++ = '-';
|
2006-07-11 00:44:36 +00:00
|
|
|
buflen--;
|
2006-07-10 07:41:34 +00:00
|
|
|
}
|
2007-03-27 22:01:31 +00:00
|
|
|
return utoa_to_buf((unsigned)n, buf, buflen);
|
2006-07-10 07:41:34 +00:00
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// The following two functions use a static buffer, so calling either one a
|
|
|
|
// second time will overwrite previous results.
|
|
|
|
//
|
|
|
|
// The largest 32 bit integer is -2 billion plus null terminator, or 12 bytes.
|
|
|
|
// Int should always be 32 bits on any remotely Unix-like system, see
|
|
|
|
// http://www.unix.org/whitepapers/64bit.html for the reasons why.
|
|
|
|
|
2006-08-04 20:20:03 +00:00
|
|
|
static char local_buf[12];
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Convert unsigned integer to ascii using a static buffer (returned).
|
2006-08-04 20:20:03 +00:00
|
|
|
char *utoa(unsigned n)
|
|
|
|
{
|
2007-03-27 22:01:31 +00:00
|
|
|
*(utoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0';
|
2006-08-04 20:20:03 +00:00
|
|
|
|
|
|
|
return local_buf;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Convert signed integer to ascii using a static buffer (returned).
|
2006-07-10 07:41:34 +00:00
|
|
|
char *itoa(int n)
|
|
|
|
{
|
2007-03-27 22:01:31 +00:00
|
|
|
*(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0';
|
2006-07-10 07:41:34 +00:00
|
|
|
|
|
|
|
return local_buf;
|
|
|
|
}
|
2006-07-15 23:00:46 +00:00
|
|
|
|
2007-01-12 22:10:34 +00:00
|
|
|
// Emit a string of hex representation of bytes
|
|
|
|
char *bin2hex(char *p, const char *cp, int count)
|
|
|
|
{
|
|
|
|
while (count) {
|
|
|
|
unsigned char c = *cp++;
|
|
|
|
/* put lowercase hex digits */
|
2007-01-26 23:31:05 +00:00
|
|
|
*p++ = 0x20 | bb_hexdigits_upcase[c >> 4];
|
|
|
|
*p++ = 0x20 | bb_hexdigits_upcase[c & 0xf];
|
2007-01-12 22:10:34 +00:00
|
|
|
count--;
|
|
|
|
}
|
|
|
|
return p;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't set gid. (Because resource limits may
|
|
|
|
// limit this user to a given number of processes, and if that fills up the
|
|
|
|
// setgid() will fail and we'll _still_be_root_, which is bad.)
|
2006-07-15 23:00:46 +00:00
|
|
|
void xsetgid(gid_t gid)
|
|
|
|
{
|
2007-05-02 23:01:32 +00:00
|
|
|
if (setgid(gid)) bb_perror_msg_and_die("setgid");
|
2006-07-15 23:00:46 +00:00
|
|
|
}
|
|
|
|
|
2006-10-20 13:28:22 +00:00
|
|
|
// Die with an error message if we can't set uid. (See xsetgid() for why.)
|
2006-07-15 23:00:46 +00:00
|
|
|
void xsetuid(uid_t uid)
|
|
|
|
{
|
2007-05-02 23:01:32 +00:00
|
|
|
if (setuid(uid)) bb_perror_msg_and_die("setuid");
|
2006-07-15 23:00:46 +00:00
|
|
|
}
|
2006-07-16 08:14:35 +00:00
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Return how long the file at fd is, if there's any way to determine it.
|
2006-07-16 08:14:35 +00:00
|
|
|
off_t fdlength(int fd)
|
|
|
|
{
|
|
|
|
off_t bottom = 0, top = 0, pos;
|
|
|
|
long size;
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// If the ioctl works for this, return it.
|
2006-07-16 08:14:35 +00:00
|
|
|
|
|
|
|
if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512;
|
|
|
|
|
2006-10-27 09:03:24 +00:00
|
|
|
// FIXME: explain why lseek(SEEK_END) is not used here!
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// If not, do a binary search for the last location we can read. (Some
|
|
|
|
// block devices don't do BLKGETSIZE right.)
|
2006-07-16 08:14:35 +00:00
|
|
|
|
|
|
|
do {
|
|
|
|
char temp;
|
|
|
|
|
2006-09-05 09:36:19 +00:00
|
|
|
pos = bottom + (top - bottom) / 2;
|
2006-07-16 08:14:35 +00:00
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// If we can read from the current location, it's bigger.
|
2006-07-16 08:14:35 +00:00
|
|
|
|
2006-10-14 02:23:43 +00:00
|
|
|
if (lseek(fd, pos, SEEK_SET)>=0 && safe_read(fd, &temp, 1)==1) {
|
2006-07-16 08:14:35 +00:00
|
|
|
if (bottom == top) bottom = top = (top+1) * 2;
|
|
|
|
else bottom = pos;
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// If we can't, it's smaller.
|
2006-07-16 08:14:35 +00:00
|
|
|
|
|
|
|
} else {
|
|
|
|
if (bottom == top) {
|
|
|
|
if (!top) return 0;
|
|
|
|
bottom = top/2;
|
|
|
|
}
|
|
|
|
else top = pos;
|
|
|
|
}
|
|
|
|
} while (bottom + 1 != top);
|
|
|
|
|
|
|
|
return pos + 1;
|
|
|
|
}
|
2006-08-03 15:41:12 +00:00
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't malloc() enough space and do an
|
|
|
|
// sprintf() into that space.
|
2006-08-03 15:41:12 +00:00
|
|
|
char *xasprintf(const char *format, ...)
|
|
|
|
{
|
|
|
|
va_list p;
|
|
|
|
int r;
|
|
|
|
char *string_ptr;
|
|
|
|
|
|
|
|
#if 1
|
|
|
|
// GNU extension
|
|
|
|
va_start(p, format);
|
|
|
|
r = vasprintf(&string_ptr, format, p);
|
|
|
|
va_end(p);
|
|
|
|
#else
|
|
|
|
// Bloat for systems that haven't got the GNU extension.
|
|
|
|
va_start(p, format);
|
|
|
|
r = vsnprintf(NULL, 0, format, p);
|
|
|
|
va_end(p);
|
|
|
|
string_ptr = xmalloc(r+1);
|
|
|
|
va_start(p, format);
|
|
|
|
r = vsnprintf(string_ptr, r+1, format, p);
|
|
|
|
va_end(p);
|
|
|
|
#endif
|
|
|
|
|
2006-09-06 18:36:50 +00:00
|
|
|
if (r < 0) bb_error_msg_and_die(bb_msg_memory_exhausted);
|
2006-08-03 15:41:12 +00:00
|
|
|
return string_ptr;
|
|
|
|
}
|
|
|
|
|
2006-12-18 22:32:45 +00:00
|
|
|
#if 0 /* If we will ever meet a libc which hasn't [f]dprintf... */
|
|
|
|
int fdprintf(int fd, const char *format, ...)
|
2006-12-18 22:10:24 +00:00
|
|
|
{
|
|
|
|
va_list p;
|
|
|
|
int r;
|
|
|
|
char *string_ptr;
|
|
|
|
|
|
|
|
#if 1
|
|
|
|
// GNU extension
|
|
|
|
va_start(p, format);
|
|
|
|
r = vasprintf(&string_ptr, format, p);
|
|
|
|
va_end(p);
|
|
|
|
#else
|
|
|
|
// Bloat for systems that haven't got the GNU extension.
|
|
|
|
va_start(p, format);
|
|
|
|
r = vsnprintf(NULL, 0, format, p);
|
|
|
|
va_end(p);
|
|
|
|
string_ptr = xmalloc(r+1);
|
|
|
|
va_start(p, format);
|
|
|
|
r = vsnprintf(string_ptr, r+1, format, p);
|
|
|
|
va_end(p);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (r >= 0) {
|
|
|
|
full_write(fd, string_ptr, r);
|
|
|
|
free(string_ptr);
|
|
|
|
}
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't copy an entire FILE * to stdout, then
|
|
|
|
// close that file.
|
2006-08-03 15:41:12 +00:00
|
|
|
void xprint_and_close_file(FILE *file)
|
|
|
|
{
|
2006-10-26 23:25:17 +00:00
|
|
|
fflush(stdout);
|
2006-08-03 15:41:12 +00:00
|
|
|
// copyfd outputs error messages for us.
|
2006-09-07 16:20:03 +00:00
|
|
|
if (bb_copyfd_eof(fileno(file), 1) == -1)
|
2007-04-10 21:38:30 +00:00
|
|
|
xfunc_die();
|
2006-08-03 15:41:12 +00:00
|
|
|
|
|
|
|
fclose(file);
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die if we can't chdir to a new path.
|
2006-08-03 15:41:12 +00:00
|
|
|
void xchdir(const char *path)
|
|
|
|
{
|
|
|
|
if (chdir(path))
|
|
|
|
bb_perror_msg_and_die("chdir(%s)", path);
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Print a warning message if opendir() fails, but don't die.
|
2006-08-03 15:41:12 +00:00
|
|
|
DIR *warn_opendir(const char *path)
|
|
|
|
{
|
|
|
|
DIR *dp;
|
|
|
|
|
2007-03-24 12:08:36 +00:00
|
|
|
dp = opendir(path);
|
|
|
|
if (!dp)
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg("can't open '%s'", path);
|
2006-08-03 15:41:12 +00:00
|
|
|
return dp;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if opendir() fails.
|
2006-08-03 15:41:12 +00:00
|
|
|
DIR *xopendir(const char *path)
|
|
|
|
{
|
|
|
|
DIR *dp;
|
|
|
|
|
2007-03-24 12:08:36 +00:00
|
|
|
dp = opendir(path);
|
|
|
|
if (!dp)
|
2007-05-26 16:44:20 +00:00
|
|
|
bb_perror_msg_and_die("can't open '%s'", path);
|
2006-08-03 15:41:12 +00:00
|
|
|
return dp;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't open a new socket.
|
2006-08-03 15:41:12 +00:00
|
|
|
int xsocket(int domain, int type, int protocol)
|
|
|
|
{
|
|
|
|
int r = socket(domain, type, protocol);
|
|
|
|
|
2007-04-13 21:26:20 +00:00
|
|
|
if (r < 0) {
|
|
|
|
/* Hijack vaguely related config option */
|
|
|
|
#if ENABLE_VERBOSE_RESOLUTION_ERRORS
|
|
|
|
const char *s = "INET";
|
|
|
|
if (domain == AF_PACKET) s = "PACKET";
|
|
|
|
if (domain == AF_NETLINK) s = "NETLINK";
|
|
|
|
USE_FEATURE_IPV6(if (domain == AF_INET6) s = "INET6";)
|
|
|
|
bb_perror_msg_and_die("socket(AF_%s)", s);
|
|
|
|
#else
|
|
|
|
bb_perror_msg_and_die("socket");
|
|
|
|
#endif
|
|
|
|
}
|
2006-08-03 15:41:12 +00:00
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't bind a socket to an address.
|
2006-08-04 20:20:03 +00:00
|
|
|
void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen)
|
|
|
|
{
|
|
|
|
if (bind(sockfd, my_addr, addrlen)) bb_perror_msg_and_die("bind");
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// Die with an error message if we can't listen for connections on a socket.
|
2006-08-03 15:41:12 +00:00
|
|
|
void xlisten(int s, int backlog)
|
|
|
|
{
|
|
|
|
if (listen(s, backlog)) bb_perror_msg_and_die("listen");
|
|
|
|
}
|
2006-09-11 09:18:09 +00:00
|
|
|
|
2007-05-26 16:44:20 +00:00
|
|
|
/* Die with an error message if sendto failed.
|
|
|
|
* Return bytes sent otherwise */
|
2007-04-12 11:34:39 +00:00
|
|
|
ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
|
|
|
|
socklen_t tolen)
|
|
|
|
{
|
|
|
|
ssize_t ret = sendto(s, buf, len, 0, to, tolen);
|
|
|
|
if (ret < 0) {
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
|
|
close(s);
|
|
|
|
bb_perror_msg_and_die("sendto");
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-09-14 19:52:07 +00:00
|
|
|
// xstat() - a stat() which dies on failure with meaningful error message
|
2007-01-27 13:45:17 +00:00
|
|
|
void xstat(const char *name, struct stat *stat_buf)
|
2006-09-11 09:18:09 +00:00
|
|
|
{
|
2006-09-17 16:28:10 +00:00
|
|
|
if (stat(name, stat_buf))
|
2006-10-03 19:57:50 +00:00
|
|
|
bb_perror_msg_and_die("can't stat '%s'", name);
|
2006-09-11 09:18:09 +00:00
|
|
|
}
|
|
|
|
|
2007-02-06 19:28:50 +00:00
|
|
|
// selinux_or_die() - die if SELinux is disabled.
|
|
|
|
void selinux_or_die(void)
|
|
|
|
{
|
|
|
|
#if ENABLE_SELINUX
|
|
|
|
int rc = is_selinux_enabled();
|
|
|
|
if (rc == 0) {
|
|
|
|
bb_error_msg_and_die("SELinux is disabled");
|
|
|
|
} else if (rc < 0) {
|
|
|
|
bb_error_msg_and_die("is_selinux_enabled() failed");
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
bb_error_msg_and_die("SELinux support is disabled");
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2006-09-20 22:06:01 +00:00
|
|
|
/* It is perfectly ok to pass in a NULL for either width or for
|
2006-10-27 09:03:24 +00:00
|
|
|
* height, in which case that value will not be set. */
|
2007-01-20 21:33:50 +00:00
|
|
|
int get_terminal_width_height(const int fd, int *width, int *height)
|
2006-09-20 22:06:01 +00:00
|
|
|
{
|
|
|
|
struct winsize win = { 0, 0, 0, 0 };
|
|
|
|
int ret = ioctl(fd, TIOCGWINSZ, &win);
|
2006-10-27 09:03:24 +00:00
|
|
|
|
|
|
|
if (height) {
|
|
|
|
if (!win.ws_row) {
|
|
|
|
char *s = getenv("LINES");
|
|
|
|
if (s) win.ws_row = atoi(s);
|
|
|
|
}
|
|
|
|
if (win.ws_row <= 1 || win.ws_row >= 30000)
|
|
|
|
win.ws_row = 24;
|
|
|
|
*height = (int) win.ws_row;
|
2006-09-20 22:06:01 +00:00
|
|
|
}
|
2006-10-27 09:03:24 +00:00
|
|
|
|
|
|
|
if (width) {
|
|
|
|
if (!win.ws_col) {
|
|
|
|
char *s = getenv("COLUMNS");
|
|
|
|
if (s) win.ws_col = atoi(s);
|
|
|
|
}
|
|
|
|
if (win.ws_col <= 1 || win.ws_col >= 30000)
|
|
|
|
win.ws_col = 80;
|
|
|
|
*width = (int) win.ws_col;
|
2006-09-20 22:06:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2007-07-14 22:07:14 +00:00
|
|
|
|
|
|
|
void ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...)
|
|
|
|
{
|
|
|
|
va_list p;
|
|
|
|
|
|
|
|
if (ioctl(fd, request, argp) < 0) {
|
|
|
|
va_start(p, fmt);
|
|
|
|
bb_vperror_msg(fmt, p);
|
|
|
|
/* xfunc_die can actually longjmp, so be nice */
|
|
|
|
va_end(p);
|
|
|
|
xfunc_die();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int ioctl_or_perror(int fd, int request, void *argp, const char *fmt,...)
|
|
|
|
{
|
|
|
|
va_list p;
|
|
|
|
int ret = ioctl(fd, request, argp);
|
|
|
|
|
|
|
|
if (ret < 0) {
|
|
|
|
va_start(p, fmt);
|
|
|
|
bb_vperror_msg(fmt, p);
|
|
|
|
va_end(p);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
#if ENABLE_IOCTL_HEX2STR_ERROR
|
|
|
|
int bb_ioctl_or_warn(int fd, int request, void *argp, const char *ioctl_name)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ioctl(fd, request, argp);
|
|
|
|
if (ret < 0)
|
|
|
|
bb_perror_msg("%s", ioctl_name);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
void bb_xioctl(int fd, int request, void *argp, const char *ioctl_name)
|
|
|
|
{
|
|
|
|
if (ioctl(fd, request, argp) < 0)
|
|
|
|
bb_perror_msg_and_die("%s", ioctl_name);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
int bb_ioctl_or_warn(int fd, int request, void *argp)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ioctl(fd, request, argp);
|
|
|
|
if (ret < 0)
|
|
|
|
bb_perror_msg("ioctl %#x failed", request);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
void bb_xioctl(int fd, int request, void *argp)
|
|
|
|
{
|
|
|
|
if (ioctl(fd, request, argp) < 0)
|
|
|
|
bb_perror_msg_and_die("ioctl %#x failed", request);
|
|
|
|
}
|
|
|
|
#endif
|