6df4bd8f8c
Some are important, e.g. the seemingly harmless braces around if with dprintf, since that dprintf is defined as empty, will screw things up and grab the next line Change-Id: Ie5e1cf813178ad708ff42ae5e477fbc96034471c
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/syscall.h>
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#include <elf.h>
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#include <dirent.h>
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#include "../../../include/uprotocol.h"
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#include "../../archdep.h"
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//#define DEBUG
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#ifndef DEBUG
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#define __dprint(msg, ...)
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#define __dprintf(arg, ...)
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#define __eprint(msg, ...)
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#define __eprintf(format, ...)
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#else
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#define __dprint(msg, ...) {printf("%s: " msg, __FUNCTION__);fflush(stdout);}
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#define __dprintf(format, ...) {printf("%s: " format, __FUNCTION__, \
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__VA_ARGS__);fflush(stdout);}
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#define __eprint(msg, ...) {fprintf(stderr, "%s: " msg, __FUNCTION__);\
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fflush(stderr);}
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#define __eprintf(format, ...) {fprintf(stderr, "%s: " format, __FUNCTION__, \
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__VA_ARGS__);fflush(stderr);}
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#endif
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extern char *chgpath(char *, char *);
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extern long do_strncpy_from_user(int, void *, void *, unsigned long);
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extern int fd;
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#define SET_ERR(ret) if (ret == -1) ret = -errno
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int
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archdep_syscall(struct syscall_wait_desc *w, long *ret)
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{
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char *fn;
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char pathbuf[PATH_MAX];
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char tmpbuf[PATH_MAX];
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switch (w->sr.number) {
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case __NR_open:
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*ret = do_strncpy_from_user(fd, pathbuf,
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(void *)w->sr.args[0], PATH_MAX);
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if (*ret >= PATH_MAX) {
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*ret = -ENAMETOOLONG;
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}
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if (*ret < 0) {
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return 0;
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}
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__dprintf("open: %s\n", pathbuf);
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fn = chgpath(pathbuf, tmpbuf);
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*ret = open(fn, w->sr.args[1], w->sr.args[2]);
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SET_ERR(*ret);
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return 0;
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}
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return -1;
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}
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