* Copyright (C) 2006 Rob Landley
* Copyright (C) 2006 Denis Vlasenko
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "busybox.h"
* succeeded. */
#ifndef DMALLOC
-#ifdef L_xmalloc
+/* 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.
+ */
// Die if we can't allocate size bytes of memory.
void *xmalloc(size_t size)
{
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
-#endif
-#ifdef L_xrealloc
// 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.)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
-#endif
+#endif /* DMALLOC */
-#ifdef L_xzalloc
// Die if we can't allocate and zero size bytes of memory.
void *xzalloc(size_t size)
{
memset(ptr, 0, size);
return ptr;
}
-#endif
-
-#endif /* DMALLOC */
-#ifdef L_xstrdup
// Die if we can't copy a string to freshly allocated memory.
char * xstrdup(const char *s)
{
return t;
}
-#endif
-#ifdef L_xstrndup
// 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.
char * xstrndup(const char *s, int n)
return safe_strncpy(t,s,n);
}
-#endif
-#ifdef L_xfopen
// 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.
FILE *xfopen(const char *path, const char *mode)
bb_perror_msg_and_die("%s", path);
return fp;
}
-#endif
-#ifdef L_xopen
// Die if we can't open an existing file and return an fd.
int xopen(const char *pathname, int flags)
{
- if (ENABLE_DEBUG && (flags && O_CREAT))
- bb_error_msg_and_die("xopen() with O_CREAT\n");
+ if (ENABLE_DEBUG && (flags & O_CREAT))
+ bb_error_msg_and_die("xopen() with O_CREAT");
return xopen3(pathname, flags, 0777);
}
-#endif
-#ifdef L_xopen3
// Die if we can't open a new file and return an fd.
int xopen3(const char *pathname, int flags, int mode)
{
}
return ret;
}
-#endif
-#ifdef L_xread
// Die with an error message if we can't read the entire buffer.
void xread(int fd, void *buf, size_t count)
{
buf = ((char *) buf) + size;
}
}
-#endif
-#ifdef L_xwrite
// Die with an error message if we can't write the entire buffer.
void xwrite(int fd, void *buf, size_t count)
{
buf = ((char *) buf) + size;
}
}
-#endif
-#ifdef L_xlseek
// Die with an error message if we can't lseek to the right spot.
void xlseek(int fd, off_t offset, int whence)
{
if (offset != lseek(fd, offset, whence)) bb_error_msg_and_die("lseek");
}
-#endif
-#ifdef L_xread_char
// Die with an error message if we can't read one character.
unsigned char xread_char(int fd)
{
return(tmp);
}
-#endif
-#ifdef L_xferror
// Die with supplied error message if this FILE * has ferror set.
void xferror(FILE *fp, const char *fn)
{
bb_error_msg_and_die("%s", fn);
}
}
-#endif
-#ifdef L_xferror_stdout
// Die with an error message if stdout has ferror set.
void xferror_stdout(void)
{
xferror(stdout, bb_msg_standard_output);
}
-#endif
-#ifdef L_xfflush_stdout
// Die with an error message if we have trouble flushing stdout.
void xfflush_stdout(void)
{
bb_perror_msg_and_die(bb_msg_standard_output);
}
}
-#endif
-#ifdef L_spawn
// This does a fork/exec in one call, using vfork(). Return PID of new child,
// -1 for failure. Runs argv[0], searching path if that has no / in it.
pid_t spawn(char **argv)
{
static int failed;
pid_t pid;
- void *app = find_applet_by_name(argv[0]);
+ void *app = ENABLE_FEATURE_SH_STANDALONE_SHELL ? find_applet_by_name(argv[0]) : 0;
// Be nice to nommu machines.
failed = 0;
}
return failed ? failed : pid;
}
-#endif
-#ifdef L_xspawn
// Die with an error message if we can't spawn a child process.
pid_t xspawn(char **argv)
{
if (pid < 0) bb_perror_msg_and_die("%s", *argv);
return pid;
}
-#endif
-#ifdef L_wait4
// Wait for the specified child PID to exit, returning child's error return.
int wait4pid(int pid)
{
if (WIFSIGNALED(status)) return WTERMSIG(status);
return 0;
}
-#endif
-#ifdef L_itoa
+void xsetenv(const char *key, const char *value)
+{
+ if(setenv(key, value, 1))
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+}
+
// Convert unsigned integer to ascii, writing into supplied buffer. A
// truncated result is always null terminated (unless buflen is 0), and
// contains the first few digits of the result ala strncpy.
return local_buf;
}
-#endif
-#ifdef L_setuid
// 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.)
{
if (setuid(uid)) bb_error_msg_and_die("setuid");
}
-#endif
-#ifdef L_fdlength
// Return how long the file at fd is, if there's any way to determine it.
off_t fdlength(int fd)
{
do {
char temp;
- pos = bottom + (top - bottom) / 2;;
+ pos = bottom + (top - bottom) / 2;
// If we can read from the current location, it's bigger.
return pos + 1;
}
-#endif
-#ifdef L_xasprintf
// Die with an error message if we can't malloc() enough space and do an
// sprintf() into that space.
char *xasprintf(const char *format, ...)
va_end(p);
#endif
- if (r < 0) bb_perror_msg_and_die("xasprintf");
+ if (r < 0) bb_error_msg_and_die(bb_msg_memory_exhausted);
return string_ptr;
}
-#endif
-#ifdef L_xprint_and_close_file
// Die with an error message if we can't copy an entire FILE * to stdout, then
// close that file.
void xprint_and_close_file(FILE *file)
{
// copyfd outputs error messages for us.
- if (bb_copyfd_eof(fileno(file), 1) == -1) exit(bb_default_error_retval);
+ if (bb_copyfd_eof(fileno(file), 1) == -1)
+ exit(xfunc_error_retval);
fclose(file);
}
-#endif
-#ifdef L_xchdir
// Die if we can't chdir to a new path.
void xchdir(const char *path)
{
if (chdir(path))
bb_perror_msg_and_die("chdir(%s)", path);
}
-#endif
-#ifdef L_warn_opendir
// Print a warning message if opendir() fails, but don't die.
DIR *warn_opendir(const char *path)
{
}
return dp;
}
-#endif
-#ifdef L_xopendir
// Die with an error message if opendir() fails.
DIR *xopendir(const char *path)
{
bb_perror_msg_and_die("unable to open `%s'", path);
return dp;
}
-#endif
-#ifdef L_xdaemon
#ifndef BB_NOMMU
// Die with an error message if we can't daemonize.
void xdaemon(int nochdir, int noclose)
{
- if (daemon(nochdir, noclose)) bb_perror_msg_and_die("daemon");
+ if (daemon(nochdir, noclose)) bb_perror_msg_and_die("daemon");
}
#endif
-#endif
-#ifdef L_xsocket
// Die with an error message if we can't open a new socket.
int xsocket(int domain, int type, int protocol)
{
return r;
}
-#endif
-#ifdef L_xbind
// Die with an error message if we can't bind a socket to an address.
void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen)
{
if (bind(sockfd, my_addr, addrlen)) bb_perror_msg_and_die("bind");
}
-#endif
-#ifdef L_xlisten
// Die with an error message if we can't listen for connections on a socket.
void xlisten(int s, int backlog)
{
if (listen(s, backlog)) bb_perror_msg_and_die("listen");
}
-#endif
+
+// xstat() - a stat() which dies on failure with meaningful error message
+void xstat(char *name, struct stat *stat_buf)
+{
+ if (stat(name, stat_buf))
+ bb_perror_msg_and_die("can't stat '%s'", name);
+}
+
+/* It is perfectly ok to pass in a NULL for either width or for
+ * * height, in which case that value will not be set. */
+int get_terminal_width_height(int fd, int *width, int *height)
+{
+ struct winsize win = { 0, 0, 0, 0 };
+ int ret = ioctl(fd, TIOCGWINSZ, &win);
+ if (!win.ws_row) {
+ char *s = getenv("LINES");
+ if (s) win.ws_row = atoi(s);
+ }
+ if (win.ws_row <= 1) win.ws_row = 24;
+ if (!win.ws_col) {
+ char *s = getenv("COLUMNS");
+ if (s) win.ws_col = atoi(s);
+ }
+ if (win.ws_col <= 1) win.ws_col = 80;
+ if (height) *height = (int) win.ws_row;
+ if (width) *width = (int) win.ws_col;
+
+ return ret;
+}
projects / oweals / busybox.git / blobdiff