mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 08:29:45 +00:00
Splitting xfuncs.c into two parts. No code chabges.
This commit is contained in:
Denis Vlasenko
parent
79cedcb2c0
commit
b12b1c87b5
@ -101,6 +101,7 @@ lib-y += wfopen_input.o
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lib-y += xatonum.o
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lib-y += xconnect.o
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lib-y += xfuncs.o
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lib-y += xfuncs_printf.o
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lib-y += xfunc_die.o
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lib-y += xgetcwd.o
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lib-y += xgethostbyname.o
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@ -560,6 +560,7 @@ getopt32(char **argv, const char *applet_opts, ...)
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llist_add_to_end((llist_t **)(on_off->optarg), optarg);
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} else if (on_off->param_type == PARAM_INT) {
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if (optarg)
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//TODO: xatoi_u indirectly pulls in printf machinery
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*(unsigned*)(on_off->optarg) = xatoi_u(optarg);
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} else if (on_off->optarg) {
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if (optarg)
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533
libbb/xfuncs.c
533
libbb/xfuncs.c
@ -9,252 +9,38 @@
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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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* TODO: move xmalloc() and xatonum() here.
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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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// Turn on nonblocking I/O on a fd
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/* Turn on nonblocking I/O on a fd */
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int ndelay_on(int fd)
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{
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return fcntl(fd, F_SETFL, fcntl(fd,F_GETFL) | O_NONBLOCK);
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}
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int close_on_exec_on(int fd)
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{
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return fcntl(fd, F_SETFD, FD_CLOEXEC);
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}
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int ndelay_off(int fd)
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{
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return fcntl(fd, F_SETFL, fcntl(fd,F_GETFL) & ~O_NONBLOCK);
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}
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void xdup2(int from, int to)
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int close_on_exec_on(int fd)
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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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return fcntl(fd, F_SETFD, FD_CLOEXEC);
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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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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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/* Converts unsigned long long value into compact 4-char
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/* Convert unsigned long long value into compact 4-char
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* representation. Examples: "1234", "1.2k", " 27M", "123T"
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* String is not terminated (buf[4] is untouched) */
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void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale)
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@ -303,7 +89,7 @@ void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale)
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}
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}
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/* Converts unsigned long long value into compact 5-char representation.
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/* Convert unsigned long long value into compact 5-char representation.
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* String is not terminated (buf[5] is untouched) */
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void smart_ulltoa5(unsigned long long ul, char buf[6], const char *scale)
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{
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@ -383,7 +169,7 @@ char *utoa_to_buf(unsigned n, char *buf, unsigned buflen)
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return buf;
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}
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// Convert signed integer to ascii, like utoa_to_buf()
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/* Convert signed integer to ascii, like utoa_to_buf() */
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char *itoa_to_buf(int n, char *buf, unsigned buflen)
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{
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if (buflen && n<0) {
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@ -398,10 +184,10 @@ char *itoa_to_buf(int n, char *buf, unsigned buflen)
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// second time will overwrite previous results.
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//
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// The largest 32 bit integer is -2 billion plus null terminator, or 12 bytes.
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// Int should always be 32 bits on any remotely Unix-like system, see
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// http://www.unix.org/whitepapers/64bit.html for the reasons why.
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// It so happens that sizeof(int) * 3 is enough for 32+ bits.
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// (sizeof(int) * 3 + 2 is correct for any width, even 8-bit)
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static char local_buf[12];
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static char local_buf[sizeof(int) * 3];
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// Convert unsigned integer to ascii using a static buffer (returned).
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char *utoa(unsigned n)
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@ -411,7 +197,7 @@ char *utoa(unsigned n)
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return local_buf;
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}
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// Convert signed integer to ascii using a static buffer (returned).
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/* Convert signed integer to ascii using a static buffer (returned). */
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char *itoa(int n)
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{
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*(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0';
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@ -419,7 +205,7 @@ char *itoa(int n)
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return local_buf;
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}
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// Emit a string of hex representation of bytes
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/* Emit a string of hex representation of bytes */
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char *bin2hex(char *p, const char *cp, int count)
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{
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while (count) {
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@ -432,21 +218,7 @@ char *bin2hex(char *p, const char *cp, int count)
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return p;
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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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// Return how long the file at fd is, if there's any way to determine it.
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/* Return how long the file at fd is, if there's any way to determine it. */
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#ifdef UNUSED
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off_t fdlength(int fd)
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{
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@ -488,192 +260,6 @@ off_t fdlength(int fd)
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}
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#endif
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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 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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|
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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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|
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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;
|
||||
int r;
|
||||
char *string_ptr;
|
||||
|
||||
#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.
|
||||
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);
|
||||
if (string_ptr) {
|
||||
va_start(p, format);
|
||||
r = vsnprintf(string_ptr, r, format, p);
|
||||
va_end(p);
|
||||
}
|
||||
#endif
|
||||
|
||||
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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||||
}
|
||||
#endif
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||||
|
||||
// Die with an error message if we can't copy an entire FILE * to stdout, then
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||||
// close that file.
|
||||
void xprint_and_close_file(FILE *file)
|
||||
{
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||||
fflush(stdout);
|
||||
// copyfd outputs error messages for us.
|
||||
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 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);
|
||||
}
|
||||
|
||||
void xchroot(const char *path)
|
||||
{
|
||||
if (chroot(path))
|
||||
bb_perror_msg_and_die("can't change root directory to %s", path);
|
||||
}
|
||||
|
||||
// Print a warning message if opendir() fails, but don't die.
|
||||
DIR *warn_opendir(const char *path)
|
||||
{
|
||||
DIR *dp;
|
||||
|
||||
dp = opendir(path);
|
||||
if (!dp)
|
||||
bb_perror_msg("can't open '%s'", path);
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return dp;
|
||||
}
|
||||
|
||||
// Die with an error message if opendir() fails.
|
||||
DIR *xopendir(const char *path)
|
||||
{
|
||||
DIR *dp;
|
||||
|
||||
dp = opendir(path);
|
||||
if (!dp)
|
||||
bb_perror_msg_and_die("can't open '%s'", path);
|
||||
return dp;
|
||||
}
|
||||
|
||||
// Die with an error message if we can't open a new socket.
|
||||
int xsocket(int domain, int type, int protocol)
|
||||
{
|
||||
int r = socket(domain, type, protocol);
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
// 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");
|
||||
}
|
||||
|
||||
// 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");
|
||||
}
|
||||
|
||||
/* Die with an error message if sendto failed.
|
||||
* Return bytes sent otherwise */
|
||||
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;
|
||||
}
|
||||
|
||||
// xstat() - a stat() which dies on failure with meaningful error message
|
||||
void xstat(const char *name, struct stat *stat_buf)
|
||||
{
|
||||
if (stat(name, stat_buf))
|
||||
bb_perror_msg_and_die("can't stat '%s'", name);
|
||||
}
|
||||
|
||||
// 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
|
||||
}
|
||||
|
||||
/* 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)
|
||||
@ -703,72 +289,3 @@ int get_terminal_width_height(int fd, int *width, int *height)
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...)
|
||||
{
|
||||
int ret;
|
||||
va_list p;
|
||||
|
||||
ret = ioctl(fd, request, argp);
|
||||
if (ret < 0) {
|
||||
va_start(p, fmt);
|
||||
bb_verror_msg(fmt, p, strerror(errno));
|
||||
/* xfunc_die can actually longjmp, so be nice */
|
||||
va_end(p);
|
||||
xfunc_die();
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
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_verror_msg(fmt, p, strerror(errno));
|
||||
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_simple_perror_msg(ioctl_name);
|
||||
return ret;
|
||||
}
|
||||
int bb_xioctl(int fd, int request, void *argp, const char *ioctl_name)
|
||||
{
|
||||
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