diff options
Diffstat (limited to 'elf/dl-object.c')
| -rw-r--r-- | elf/dl-object.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/elf/dl-object.c b/elf/dl-object.c index ed4b059754..f2ef8163ce 100644 --- a/elf/dl-object.c +++ b/elf/dl-object.c @@ -20,6 +20,7 @@ #include <errno.h> #include <string.h> #include <stdlib.h> +#include <unistd.h> #include <elf/ldsodefs.h> #include <assert.h> @@ -61,5 +62,68 @@ _dl_new_object (char *realname, const char *libname, int type) l->l_next = new; } + /* The REALNAME is "" for the main link map. This name must be determined + specially. */ + if (realname[0] == '\0') + new->l_origin = NULL; + else + { + char *origin; + + if (realname[0] == '/') + { + /* It an absolute path. Use it. But we have to make a copy since + we strip out the trailing slash. */ + size_t len = strlen (realname) + 1; + origin = malloc (len); + if (origin == NULL) + origin = (char *) -1; + else + memcpy (origin, realname, len); + } + else + { + size_t realname_len = strlen (realname) + 1; + size_t len = 128 + realname_len; + char *result = NULL; + + /* Get the current directory name. */ + origin = malloc (len); + + while (origin != NULL + && (result = __getcwd (origin, len - realname_len)) == NULL + && errno == ERANGE) + { + len += 128; + origin = (char *) realloc (origin, len); + } + + if (result == NULL) + { + /* We were not able to determine the current directory. */ + if (origin != NULL) + free (origin); + origin = (char *) -1; + } + else + { + /* Now append the filename. */ + char *cp = strchr (origin, '\0'); + + if (cp [-1] != '/') + *cp++ = '/'; + + memcpy (cp, realname, realname_len); + } + } + + if (origin != (char *) -1) + /* Now remove the filename and the slash. Do this even if the + string is something like "/foo" which leaves an empty string. */ + *strrchr (origin, '/') = '\0'; + + new->l_origin = origin; + } + return new; } |