diff options
Diffstat (limited to 'usr.sbin/config/main.c')
-rw-r--r-- | usr.sbin/config/main.c | 58 |
1 files changed, 51 insertions, 7 deletions
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c index 2b5e055..e63e6ab 100644 --- a/usr.sbin/config/main.c +++ b/usr.sbin/config/main.c @@ -90,6 +90,7 @@ static void get_srcdir(void); static void usage(void); static void cleanheaders(char *); static void kernconfdump(const char *); +static void checkversion(void); struct hdr_list { char *h_name; @@ -204,6 +205,7 @@ main(int argc, char **argv) printf("cpu type must be specified\n"); exit(1); } + checkversion(); /* * make symbolic links in compilation directory @@ -668,7 +670,7 @@ kernconfdump(const char *file) struct stat st; FILE *fp, *pp; int error, len, osz, r; - unsigned int i, off, size; + unsigned int i, off, size, t1, t2, align; char *cmd, *o; r = open(file, O_RDONLY); @@ -687,8 +689,8 @@ kernconfdump(const char *file) if (o == NULL) err(EXIT_FAILURE, "Couldn't allocate memory"); /* ELF note section header. */ - asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 5 kern_conf" - "| tail -2 | cut -d ' ' -f 2 | paste - - -", file); + asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 8 kern_conf" + "| tail -5 | cut -d ' ' -f 2 | paste - - - - -", file); if (cmd == NULL) errx(EXIT_FAILURE, "asprintf() failed"); pp = popen(cmd, "r"); @@ -697,27 +699,69 @@ kernconfdump(const char *file) free(cmd); len = fread(o, osz, 1, pp); pclose(pp); - r = sscanf(o, "%d\t%d", &off, &size); + r = sscanf(o, "%d%d%d%d%d", &off, &size, &t1, &t2, &align); free(o); - if (r != 2) + if (r != 5) errx(EXIT_FAILURE, "File %s doesn't contain configuration " "file. Either unsupported, or not compiled with " "INCLUDE_CONFIG_FILE", file); r = fseek(fp, off, SEEK_CUR); if (r != 0) err(EXIT_FAILURE, "fseek() failed"); - for (i = 0; i < size - 1; i++) { + for (i = 0; i < size; i++) { r = fgetc(fp); if (r == EOF) break; /* * If '\0' is present in the middle of the configuration * string, this means something very weird is happening. - * Make such case very visible. + * Make such case very visible. However, some architectures + * pad the length of the section with NULs to a multiple of + * sh_addralign, allow a NUL in that part of the section. */ + if (r == '\0' && (size - i) < align) + break; assert(r != '\0' && ("Char present in the configuration " "string mustn't be equal to 0")); fputc(r, stdout); } fclose(fp); } + +static void +badversion(int versreq) +{ + fprintf(stderr, "ERROR: version of config(8) does not match kernel!\n"); + fprintf(stderr, "config version = %d, ", CONFIGVERS); + fprintf(stderr, "version required = %d\n\n", versreq); + fprintf(stderr, "Make sure that /usr/src/usr.sbin/config is in sync\n"); + fprintf(stderr, "with your /usr/src/sys and install a new config binary\n"); + fprintf(stderr, "before trying this again.\n\n"); + fprintf(stderr, "If running the new config fails check your config\n"); + fprintf(stderr, "file against the GENERIC or LINT config files for\n"); + fprintf(stderr, "changes in config syntax, or option/device naming\n"); + fprintf(stderr, "conventions\n\n"); + exit(1); +} + +static void +checkversion(void) +{ + FILE *ifp; + char line[BUFSIZ]; + int versreq; + + ifp = open_makefile_template(); + while (fgets(line, BUFSIZ, ifp) != 0) { + if (*line != '%') + continue; + if (strncmp(line, "%VERSREQ=", 9) != 0) + continue; + versreq = atoi(line + 9); + if (MAJOR_VERS(versreq) == MAJOR_VERS(CONFIGVERS) && + versreq <= CONFIGVERS) + continue; + badversion(versreq); + } + fclose(ifp); +} |