mirror of
https://github.com/sheumann/hush.git
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actually adding xfuncs_printf.c :(
This commit is contained in:
Denis Vlasenko
parent
b12b1c87b5
commit
858ebf130a
521
libbb/xfuncs_printf.c
Normal file
521
libbb/xfuncs_printf.c
Normal file
@ -0,0 +1,521 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2006 Rob Landley
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* Copyright (C) 2006 Denys Vlasenko
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*
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* Licensed under GPL version 2, see file LICENSE in this tarball for details.
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*/
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/* We need to have separate xfuncs.c and xfuncs_printf.c because
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* with current linkers, even with section garbage collection,
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* if *.o module references any of XXXprintf functions, you pull in
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* entire printf machinery. Even if you do not use the function
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* which uses XXXprintf.
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*
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* xfuncs.c contains functions (not necessarily xfuncs)
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* which do not pull in printf, directly or indirectly.
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* xfunc_printf.c contains those which do.
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*/
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#include "libbb.h"
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/* All the functions starting with "x" call bb_error_msg_and_die() if they
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* fail, so callers never need to check for errors. If it returned, it
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* succeeded. */
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#ifndef DMALLOC
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/* dmalloc provides variants of these that do abort() on failure.
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* Since dmalloc's prototypes overwrite the impls here as they are
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* included after these prototypes in libbb.h, all is well.
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*/
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// Warn if we can't allocate size bytes of memory.
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void *malloc_or_warn(size_t size)
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{
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void *ptr = malloc(size);
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if (ptr == NULL && size != 0)
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bb_error_msg(bb_msg_memory_exhausted);
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return ptr;
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}
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// Die if we can't allocate size bytes of memory.
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void *xmalloc(size_t size)
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{
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void *ptr = malloc(size);
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if (ptr == NULL && size != 0)
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bb_error_msg_and_die(bb_msg_memory_exhausted);
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return ptr;
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}
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// Die if we can't resize previously allocated memory. (This returns a pointer
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// to the new memory, which may or may not be the same as the old memory.
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// It'll copy the contents to a new chunk and free the old one if necessary.)
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void *xrealloc(void *ptr, size_t size)
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{
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ptr = realloc(ptr, size);
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if (ptr == NULL && size != 0)
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bb_error_msg_and_die(bb_msg_memory_exhausted);
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return ptr;
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}
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#endif /* DMALLOC */
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// Die if we can't allocate and zero size bytes of memory.
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void *xzalloc(size_t size)
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{
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void *ptr = xmalloc(size);
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memset(ptr, 0, size);
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return ptr;
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}
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// Die if we can't copy a string to freshly allocated memory.
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char * xstrdup(const char *s)
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{
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char *t;
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if (s == NULL)
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return NULL;
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t = strdup(s);
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if (t == NULL)
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bb_error_msg_and_die(bb_msg_memory_exhausted);
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return t;
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}
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// Die if we can't allocate n+1 bytes (space for the null terminator) and copy
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// the (possibly truncated to length n) string into it.
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char *xstrndup(const char *s, int n)
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{
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int m;
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char *t;
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if (ENABLE_DEBUG && s == NULL)
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bb_error_msg_and_die("xstrndup bug");
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/* We can just xmalloc(n+1) and strncpy into it, */
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/* but think about xstrndup("abc", 10000) wastage! */
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m = n;
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t = (char*) s;
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while (m) {
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if (!*t) break;
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m--;
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t++;
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}
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n -= m;
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t = xmalloc(n + 1);
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t[n] = '\0';
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return memcpy(t, s, n);
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}
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// Die if we can't open a file and return a FILE * to it.
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// Notice we haven't got xfread(), This is for use with fscanf() and friends.
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FILE *xfopen(const char *path, const char *mode)
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{
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FILE *fp = fopen(path, mode);
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if (fp == NULL)
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bb_perror_msg_and_die("can't open '%s'", path);
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return fp;
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}
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// Die if we can't open a file and return a fd.
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int xopen3(const char *pathname, int flags, int mode)
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{
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int ret;
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ret = open(pathname, flags, mode);
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if (ret < 0) {
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bb_perror_msg_and_die("can't open '%s'", pathname);
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}
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return ret;
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}
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// Die if we can't open an existing file and return a fd.
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int xopen(const char *pathname, int flags)
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{
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return xopen3(pathname, flags, 0666);
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}
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// Warn if we can't open a file and return a fd.
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int open3_or_warn(const char *pathname, int flags, int mode)
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{
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int ret;
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ret = open(pathname, flags, mode);
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if (ret < 0) {
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bb_perror_msg("can't open '%s'", pathname);
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}
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return ret;
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}
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// Warn if we can't open a file and return a fd.
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int open_or_warn(const char *pathname, int flags)
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{
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return open3_or_warn(pathname, flags, 0666);
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}
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void xunlink(const char *pathname)
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{
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if (unlink(pathname))
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bb_perror_msg_and_die("can't remove file '%s'", pathname);
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}
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void xrename(const char *oldpath, const char *newpath)
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{
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if (rename(oldpath, newpath))
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bb_perror_msg_and_die("can't move '%s' to '%s'", oldpath, newpath);
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}
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int rename_or_warn(const char *oldpath, const char *newpath)
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{
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int n = rename(oldpath, newpath);
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if (n)
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bb_perror_msg("can't move '%s' to '%s'", oldpath, newpath);
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return n;
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}
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void xpipe(int filedes[2])
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{
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if (pipe(filedes))
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bb_perror_msg_and_die("can't create pipe");
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}
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void xdup2(int from, int to)
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{
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if (dup2(from, to) != to)
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bb_perror_msg_and_die("can't duplicate file descriptor");
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}
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// "Renumber" opened fd
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void xmove_fd(int from, int to)
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{
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if (from == to)
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return;
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xdup2(from, to);
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close(from);
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}
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// Die with an error message if we can't write the entire buffer.
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void xwrite(int fd, const void *buf, size_t count)
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{
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if (count) {
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ssize_t size = full_write(fd, buf, count);
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if (size != count)
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bb_error_msg_and_die("short write");
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}
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}
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// Die with an error message if we can't lseek to the right spot.
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off_t xlseek(int fd, off_t offset, int whence)
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{
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off_t off = lseek(fd, offset, whence);
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if (off == (off_t)-1) {
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if (whence == SEEK_SET)
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bb_perror_msg_and_die("lseek(%"OFF_FMT"u)", offset);
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bb_perror_msg_and_die("lseek");
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}
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return off;
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}
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// Die with supplied filename if this FILE * has ferror set.
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void die_if_ferror(FILE *fp, const char *fn)
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{
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if (ferror(fp)) {
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/* ferror doesn't set useful errno */
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bb_error_msg_and_die("%s: I/O error", fn);
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}
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}
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// Die with an error message if stdout has ferror set.
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void die_if_ferror_stdout(void)
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{
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die_if_ferror(stdout, bb_msg_standard_output);
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}
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// Die with an error message if we have trouble flushing stdout.
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void xfflush_stdout(void)
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{
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if (fflush(stdout)) {
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bb_perror_msg_and_die(bb_msg_standard_output);
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}
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}
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int bb_putchar(int ch)
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{
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/* time.c needs putc(ch, stdout), not putchar(ch).
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* it does "stdout = stderr;", but then glibc's putchar()
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* doesn't work as expected. bad glibc, bad */
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return putc(ch, stdout);
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}
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/* Die with an error message if we can't copy an entire FILE * to stdout,
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* then close that file. */
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void xprint_and_close_file(FILE *file)
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{
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fflush(stdout);
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// copyfd outputs error messages for us.
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if (bb_copyfd_eof(fileno(file), 1) == -1)
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xfunc_die();
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fclose(file);
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}
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// Die with an error message if we can't malloc() enough space and do an
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// sprintf() into that space.
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char *xasprintf(const char *format, ...)
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{
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va_list p;
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int r;
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char *string_ptr;
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#if 1
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// GNU extension
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va_start(p, format);
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r = vasprintf(&string_ptr, format, p);
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va_end(p);
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#else
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// Bloat for systems that haven't got the GNU extension.
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va_start(p, format);
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r = vsnprintf(NULL, 0, format, p);
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va_end(p);
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string_ptr = xmalloc(r+1);
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va_start(p, format);
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r = vsnprintf(string_ptr, r+1, format, p);
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va_end(p);
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#endif
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if (r < 0)
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bb_error_msg_and_die(bb_msg_memory_exhausted);
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return string_ptr;
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}
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#if 0 /* If we will ever meet a libc which hasn't [f]dprintf... */
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int fdprintf(int fd, const char *format, ...)
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{
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va_list p;
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int r;
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char *string_ptr;
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#if 1
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// GNU extension
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va_start(p, format);
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r = vasprintf(&string_ptr, format, p);
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va_end(p);
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#else
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// Bloat for systems that haven't got the GNU extension.
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va_start(p, format);
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r = vsnprintf(NULL, 0, format, p) + 1;
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va_end(p);
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string_ptr = malloc(r);
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if (string_ptr) {
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va_start(p, format);
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r = vsnprintf(string_ptr, r, format, p);
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va_end(p);
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}
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#endif
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if (r >= 0) {
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full_write(fd, string_ptr, r);
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free(string_ptr);
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}
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return r;
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}
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#endif
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void xsetenv(const char *key, const char *value)
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{
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if (setenv(key, value, 1))
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bb_error_msg_and_die(bb_msg_memory_exhausted);
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}
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// Die with an error message if we can't set gid. (Because resource limits may
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// limit this user to a given number of processes, and if that fills up the
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// setgid() will fail and we'll _still_be_root_, which is bad.)
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void xsetgid(gid_t gid)
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{
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if (setgid(gid)) bb_perror_msg_and_die("setgid");
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}
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// Die with an error message if we can't set uid. (See xsetgid() for why.)
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void xsetuid(uid_t uid)
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{
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if (setuid(uid)) bb_perror_msg_and_die("setuid");
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}
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// Die if we can't chdir to a new path.
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void xchdir(const char *path)
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{
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if (chdir(path))
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bb_perror_msg_and_die("chdir(%s)", path);
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}
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void xchroot(const char *path)
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{
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if (chroot(path))
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bb_perror_msg_and_die("can't change root directory to %s", path);
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}
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// Print a warning message if opendir() fails, but don't die.
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DIR *warn_opendir(const char *path)
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{
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DIR *dp;
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dp = opendir(path);
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if (!dp)
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bb_perror_msg("can't open '%s'", path);
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return dp;
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}
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// Die with an error message if opendir() fails.
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DIR *xopendir(const char *path)
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{
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DIR *dp;
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dp = opendir(path);
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if (!dp)
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bb_perror_msg_and_die("can't open '%s'", path);
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return dp;
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}
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// Die with an error message if we can't open a new socket.
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int xsocket(int domain, int type, int protocol)
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{
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int r = socket(domain, type, protocol);
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if (r < 0) {
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/* Hijack vaguely related config option */
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#if ENABLE_VERBOSE_RESOLUTION_ERRORS
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const char *s = "INET";
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if (domain == AF_PACKET) s = "PACKET";
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if (domain == AF_NETLINK) s = "NETLINK";
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USE_FEATURE_IPV6(if (domain == AF_INET6) s = "INET6";)
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bb_perror_msg_and_die("socket(AF_%s)", s);
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#else
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bb_perror_msg_and_die("socket");
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#endif
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}
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return r;
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}
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// Die with an error message if we can't bind a socket to an address.
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void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen)
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{
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if (bind(sockfd, my_addr, addrlen)) bb_perror_msg_and_die("bind");
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}
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// Die with an error message if we can't listen for connections on a socket.
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void xlisten(int s, int backlog)
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{
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if (listen(s, backlog)) bb_perror_msg_and_die("listen");
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}
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/* Die with an error message if sendto failed.
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* Return bytes sent otherwise */
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ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
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socklen_t tolen)
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{
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ssize_t ret = sendto(s, buf, len, 0, to, tolen);
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if (ret < 0) {
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if (ENABLE_FEATURE_CLEAN_UP)
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close(s);
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bb_perror_msg_and_die("sendto");
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}
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return ret;
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}
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// xstat() - a stat() which dies on failure with meaningful error message
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void xstat(const char *name, struct stat *stat_buf)
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{
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if (stat(name, stat_buf))
|
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bb_perror_msg_and_die("can't stat '%s'", name);
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}
|
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|
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// selinux_or_die() - die if SELinux is disabled.
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void selinux_or_die(void)
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{
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#if ENABLE_SELINUX
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int rc = is_selinux_enabled();
|
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if (rc == 0) {
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bb_error_msg_and_die("SELinux is disabled");
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} else if (rc < 0) {
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bb_error_msg_and_die("is_selinux_enabled() failed");
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}
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#else
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bb_error_msg_and_die("SELinux support is disabled");
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#endif
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}
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int ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...)
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{
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int ret;
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va_list p;
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ret = ioctl(fd, request, argp);
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if (ret < 0) {
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va_start(p, fmt);
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bb_verror_msg(fmt, p, strerror(errno));
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/* xfunc_die can actually longjmp, so be nice */
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va_end(p);
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xfunc_die();
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}
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return ret;
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||||
}
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||||
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int ioctl_or_perror(int fd, int request, void *argp, const char *fmt,...)
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{
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va_list p;
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int ret = ioctl(fd, request, argp);
|
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|
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if (ret < 0) {
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va_start(p, fmt);
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bb_verror_msg(fmt, p, strerror(errno));
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va_end(p);
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}
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return ret;
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}
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||||
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#if ENABLE_IOCTL_HEX2STR_ERROR
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int bb_ioctl_or_warn(int fd, int request, void *argp, const char *ioctl_name)
|
||||
{
|
||||
int ret;
|
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ret = ioctl(fd, request, argp);
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if (ret < 0)
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bb_simple_perror_msg(ioctl_name);
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return ret;
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}
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int bb_xioctl(int fd, int request, void *argp, const char *ioctl_name)
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{
|
||||
int ret;
|
||||
|
||||
ret = ioctl(fd, request, argp);
|
||||
if (ret < 0)
|
||||
bb_simple_perror_msg_and_die(ioctl_name);
|
||||
return ret;
|
||||
}
|
||||
#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;
|
||||
}
|
||||
int bb_xioctl(int fd, int request, void *argp)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = ioctl(fd, request, argp);
|
||||
if (ret < 0)
|
||||
bb_perror_msg_and_die("ioctl %#x failed", request);
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user