diff options
Diffstat (limited to 'usr.sbin/config/main.c')
-rw-r--r-- | usr.sbin/config/main.c | 753 |
1 files changed, 753 insertions, 0 deletions
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c new file mode 100644 index 0000000..14061c2 --- /dev/null +++ b/usr.sbin/config/main.c @@ -0,0 +1,753 @@ +/* + * Copyright (c) 1980, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; +#endif +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/sbuf.h> +#include <sys/file.h> +#include <sys/mman.h> +#include <sys/param.h> + +#include <assert.h> +#include <ctype.h> +#include <err.h> +#include <stdio.h> +#include <string.h> +#include <sysexits.h> +#include <unistd.h> +#include <dirent.h> +#include "y.tab.h" +#include "config.h" +#include "configvers.h" + +#ifndef TRUE +#define TRUE (1) +#endif + +#ifndef FALSE +#define FALSE (0) +#endif + +#define CDIR "../compile/" + +char * PREFIX; +char destdir[MAXPATHLEN]; +char srcdir[MAXPATHLEN]; + +int debugging; +int profiling; +int found_defaults; +int incignore; + +/* + * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included + * literally). + */ +int filebased = 0; + +static void configfile(void); +static void get_srcdir(void); +static void usage(void); +static void cleanheaders(char *); +static void kernconfdump(const char *); +static void checkversion(void); +extern int yyparse(void); + +struct hdr_list { + char *h_name; + struct hdr_list *h_next; +} *htab; + +/* + * Config builds a set of files for building a UNIX + * system given a description of the desired system. + */ +int +main(int argc, char **argv) +{ + + struct stat buf; + int ch, len; + char *p; + char *kernfile; + int printmachine; + + printmachine = 0; + kernfile = NULL; + while ((ch = getopt(argc, argv, "Cd:gmpVx:")) != -1) + switch (ch) { + case 'C': + filebased = 1; + break; + case 'm': + printmachine = 1; + break; + case 'd': + if (*destdir == '\0') + strlcpy(destdir, optarg, sizeof(destdir)); + else + errx(EXIT_FAILURE, "directory already set"); + break; + case 'g': + debugging++; + break; + case 'p': + profiling++; + break; + case 'V': + printf("%d\n", CONFIGVERS); + exit(0); + case 'x': + kernfile = optarg; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (kernfile != NULL) { + kernconfdump(kernfile); + exit(EXIT_SUCCESS); + } + + if (argc != 1) + usage(); + + PREFIX = *argv; + if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode)) + err(2, "%s", PREFIX); + if (freopen("DEFAULTS", "r", stdin) != NULL) { + found_defaults = 1; + yyfile = "DEFAULTS"; + } else { + if (freopen(PREFIX, "r", stdin) == NULL) + err(2, "%s", PREFIX); + yyfile = PREFIX; + } + if (*destdir != '\0') { + len = strlen(destdir); + while (len > 1 && destdir[len - 1] == '/') + destdir[--len] = '\0'; + get_srcdir(); + } else { + strlcpy(destdir, CDIR, sizeof(destdir)); + strlcat(destdir, PREFIX, sizeof(destdir)); + } + + SLIST_INIT(&cputype); + SLIST_INIT(&mkopt); + SLIST_INIT(&opt); + SLIST_INIT(&rmopts); + STAILQ_INIT(&cfgfiles); + STAILQ_INIT(&dtab); + STAILQ_INIT(&fntab); + STAILQ_INIT(&ftab); + STAILQ_INIT(&hints); + if (yyparse()) + exit(3); + + /* + * Ensure that required elements (machine, cpu, ident) are present. + */ + if (machinename == NULL) { + printf("Specify machine type, e.g. ``machine i386''\n"); + exit(1); + } + if (ident == NULL) { + printf("no ident line specified\n"); + exit(1); + } + if (SLIST_EMPTY(&cputype)) { + printf("cpu type must be specified\n"); + exit(1); + } + checkversion(); + + if (printmachine) { + printf("%s\t%s\n",machinename,machinearch); + exit(0); + } + + /* Make compile directory */ + p = path((char *)NULL); + if (stat(p, &buf)) { + if (mkdir(p, 0777)) + err(2, "%s", p); + } else if (!S_ISDIR(buf.st_mode)) + errx(EXIT_FAILURE, "%s isn't a directory", p); + + configfile(); /* put config file into kernel*/ + options(); /* make options .h files */ + makefile(); /* build Makefile */ + makeenv(); /* build env.c */ + makehints(); /* build hints.c */ + headers(); /* make a lot of .h files */ + cleanheaders(p); + printf("Kernel build directory is %s\n", p); + printf("Don't forget to do ``make cleandepend && make depend''\n"); + exit(0); +} + +/* + * get_srcdir + * determine the root of the kernel source tree + * and save that in srcdir. + */ +static void +get_srcdir(void) +{ + struct stat lg, phy; + char *p, *pwd; + int i; + + if (realpath("../..", srcdir) == NULL) + err(EXIT_FAILURE, "Unable to find root of source tree"); + if ((pwd = getenv("PWD")) != NULL && *pwd == '/' && + (pwd = strdup(pwd)) != NULL) { + /* Remove the last two path components. */ + for (i = 0; i < 2; i++) { + if ((p = strrchr(pwd, '/')) == NULL) { + free(pwd); + return; + } + *p = '\0'; + } + if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 && + lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino) + strlcpy(srcdir, pwd, MAXPATHLEN); + free(pwd); + } +} + +static void +usage(void) +{ + + fprintf(stderr, "usage: config [-CgmpV] [-d destdir] sysname\n"); + fprintf(stderr, " config -x kernel\n"); + exit(EX_USAGE); +} + +/* + * get_word + * returns EOF on end of file + * NULL on end of line + * pointer to the word otherwise + */ +char * +get_word(FILE *fp) +{ + static char line[80]; + int ch; + char *cp; + int escaped_nl = 0; + +begin: + while ((ch = getc(fp)) != EOF) + if (ch != ' ' && ch != '\t') + break; + if (ch == EOF) + return ((char *)EOF); + if (ch == '\\'){ + escaped_nl = 1; + goto begin; + } + if (ch == '\n') { + if (escaped_nl){ + escaped_nl = 0; + goto begin; + } + else + return (NULL); + } + cp = line; + *cp++ = ch; + while ((ch = getc(fp)) != EOF) { + if (isspace(ch)) + break; + *cp++ = ch; + } + *cp = 0; + if (ch == EOF) + return ((char *)EOF); + (void) ungetc(ch, fp); + return (line); +} + +/* + * get_quoted_word + * like get_word but will accept something in double or single quotes + * (to allow embedded spaces). + */ +char * +get_quoted_word(FILE *fp) +{ + static char line[256]; + int ch; + char *cp; + int escaped_nl = 0; + +begin: + while ((ch = getc(fp)) != EOF) + if (ch != ' ' && ch != '\t') + break; + if (ch == EOF) + return ((char *)EOF); + if (ch == '\\'){ + escaped_nl = 1; + goto begin; + } + if (ch == '\n') { + if (escaped_nl){ + escaped_nl = 0; + goto begin; + } + else + return (NULL); + } + cp = line; + if (ch == '"' || ch == '\'') { + int quote = ch; + + while ((ch = getc(fp)) != EOF) { + if (ch == quote) + break; + if (ch == '\n') { + *cp = 0; + printf("config: missing quote reading `%s'\n", + line); + exit(2); + } + *cp++ = ch; + } + } else { + *cp++ = ch; + while ((ch = getc(fp)) != EOF) { + if (isspace(ch)) + break; + *cp++ = ch; + } + if (ch != EOF) + (void) ungetc(ch, fp); + } + *cp = 0; + if (ch == EOF) + return ((char *)EOF); + return (line); +} + +/* + * prepend the path to a filename + */ +char * +path(const char *file) +{ + char *cp = NULL; + + if (file) + asprintf(&cp, "%s/%s", destdir, file); + else + cp = strdup(destdir); + return (cp); +} + +/* + * Generate configuration file based on actual settings. With this mode, user + * will be able to obtain and build conifguration file with one command. + */ +static void +configfile_dynamic(struct sbuf *sb) +{ + struct cputype *cput; + struct device *d; + struct opt *ol; + char *lend; + unsigned int i; + + asprintf(&lend, "\\n\\\n"); + assert(lend != NULL); + sbuf_printf(sb, "options\t%s%s", OPT_AUTOGEN, lend); + sbuf_printf(sb, "ident\t%s%s", ident, lend); + sbuf_printf(sb, "machine\t%s%s", machinename, lend); + SLIST_FOREACH(cput, &cputype, cpu_next) + sbuf_printf(sb, "cpu\t%s%s", cput->cpu_name, lend); + SLIST_FOREACH(ol, &mkopt, op_next) + sbuf_printf(sb, "makeoptions\t%s=%s%s", ol->op_name, + ol->op_value, lend); + SLIST_FOREACH(ol, &opt, op_next) { + if (strncmp(ol->op_name, "DEV_", 4) == 0) + continue; + sbuf_printf(sb, "options\t%s", ol->op_name); + if (ol->op_value != NULL) { + sbuf_putc(sb, '='); + for (i = 0; i < strlen(ol->op_value); i++) { + if (ol->op_value[i] == '"') + sbuf_printf(sb, "\\%c", + ol->op_value[i]); + else + sbuf_printf(sb, "%c", + ol->op_value[i]); + } + sbuf_printf(sb, "%s", lend); + } else { + sbuf_printf(sb, "%s", lend); + } + } + /* + * Mark this file as containing everything we need. + */ + STAILQ_FOREACH(d, &dtab, d_next) + sbuf_printf(sb, "device\t%s%s", d->d_name, lend); + free(lend); +} + +/* + * Generate file from the configuration files. + */ +static void +configfile_filebased(struct sbuf *sb) +{ + FILE *cff; + struct cfgfile *cf; + int i; + + /* + * Try to read all configuration files. Since those will be present as + * C string in the macro, we have to slash their ends then the line + * wraps. + */ + STAILQ_FOREACH(cf, &cfgfiles, cfg_next) { + cff = fopen(cf->cfg_path, "r"); + if (cff == NULL) { + warn("Couldn't open file %s", cf->cfg_path); + continue; + } + while ((i = getc(cff)) != EOF) { + if (i == '\n') + sbuf_printf(sb, "\\n\\\n"); + else if (i == '"' || i == '\'') + sbuf_printf(sb, "\\%c", i); + else + sbuf_putc(sb, i); + } + fclose(cff); + } +} + +static void +configfile(void) +{ + FILE *fo; + struct sbuf *sb; + char *p; + + /* Add main configuration file to the list of files to be included */ + cfgfile_add(PREFIX); + p = path("config.c.new"); + fo = fopen(p, "w"); + if (!fo) + err(2, "%s", p); + sb = sbuf_new(NULL, NULL, 2048, SBUF_AUTOEXTEND); + assert(sb != NULL); + sbuf_clear(sb); + if (filebased) { + /* Is needed, can be used for backward compatibility. */ + configfile_filebased(sb); + } else { + configfile_dynamic(sb); + } + sbuf_finish(sb); + /* + * We print first part of the template, replace our tag with + * configuration files content and later continue writing our + * template. + */ + p = strstr(kernconfstr, KERNCONFTAG); + if (p == NULL) + errx(EXIT_FAILURE, "Something went terribly wrong!"); + *p = '\0'; + fprintf(fo, "%s", kernconfstr); + fprintf(fo, "%s", sbuf_data(sb)); + p += strlen(KERNCONFTAG); + fprintf(fo, "%s", p); + sbuf_delete(sb); + fclose(fo); + moveifchanged(path("config.c.new"), path("config.c")); + cfgfile_removeall(); +} + +/* + * moveifchanged -- + * compare two files; rename if changed. + */ +void +moveifchanged(const char *from_name, const char *to_name) +{ + char *p, *q; + int changed; + size_t tsize; + struct stat from_sb, to_sb; + int from_fd, to_fd; + + changed = 0; + + if ((from_fd = open(from_name, O_RDONLY)) < 0) + err(EX_OSERR, "moveifchanged open(%s)", from_name); + + if ((to_fd = open(to_name, O_RDONLY)) < 0) + changed++; + + if (!changed && fstat(from_fd, &from_sb) < 0) + err(EX_OSERR, "moveifchanged fstat(%s)", from_name); + + if (!changed && fstat(to_fd, &to_sb) < 0) + err(EX_OSERR, "moveifchanged fstat(%s)", to_name); + + if (!changed && from_sb.st_size != to_sb.st_size) + changed++; + + tsize = (size_t)from_sb.st_size; + + if (!changed) { + p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); + if (p == MAP_FAILED) + err(EX_OSERR, "mmap %s", from_name); + q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); + if (q == MAP_FAILED) + err(EX_OSERR, "mmap %s", to_name); + + changed = memcmp(p, q, tsize); + munmap(p, tsize); + munmap(q, tsize); + } + if (changed) { + if (rename(from_name, to_name) < 0) + err(EX_OSERR, "rename(%s, %s)", from_name, to_name); + } else { + if (unlink(from_name) < 0) + err(EX_OSERR, "unlink(%s)", from_name); + } +} + +static void +cleanheaders(char *p) +{ + DIR *dirp; + struct dirent *dp; + struct file_list *fl; + struct hdr_list *hl; + size_t len; + + remember("y.tab.h"); + remember("setdefs.h"); + STAILQ_FOREACH(fl, &ftab, f_next) + remember(fl->f_fn); + + /* + * Scan the build directory and clean out stuff that looks like + * it might have been a leftover NFOO header, etc. + */ + if ((dirp = opendir(p)) == NULL) + err(EX_OSERR, "opendir %s", p); + while ((dp = readdir(dirp)) != NULL) { + len = strlen(dp->d_name); + /* Skip non-headers */ + if (len < 2 || dp->d_name[len - 2] != '.' || + dp->d_name[len - 1] != 'h') + continue; + /* Skip special stuff, eg: bus_if.h, but check opt_*.h */ + if (strchr(dp->d_name, '_') && + strncmp(dp->d_name, "opt_", 4) != 0) + continue; + /* Check if it is a target file */ + for (hl = htab; hl != NULL; hl = hl->h_next) { + if (eq(dp->d_name, hl->h_name)) { + break; + } + } + if (hl) + continue; + printf("Removing stale header: %s\n", dp->d_name); + if (unlink(path(dp->d_name)) == -1) + warn("unlink %s", dp->d_name); + } + (void)closedir(dirp); +} + +void +remember(const char *file) +{ + char *s; + struct hdr_list *hl; + + if ((s = strrchr(file, '/')) != NULL) + s = ns(s + 1); + else + s = ns(file); + + if (strchr(s, '_') && strncmp(s, "opt_", 4) != 0) { + free(s); + return; + } + for (hl = htab; hl != NULL; hl = hl->h_next) { + if (eq(s, hl->h_name)) { + free(s); + return; + } + } + hl = calloc(1, sizeof(*hl)); + if (hl == NULL) + err(EXIT_FAILURE, "calloc"); + hl->h_name = s; + hl->h_next = htab; + htab = hl; +} + +/* + * This one is quick hack. Will be probably moved to elf(3) interface. + * It takes kernel configuration file name, passes it as an argument to + * elfdump -a, which output is parsed by some UNIX tools... + */ +static void +kernconfdump(const char *file) +{ + struct stat st; + FILE *fp, *pp; + int error, len, osz, r; + unsigned int i, off, size, t1, t2, align; + char *cmd, *o; + + r = open(file, O_RDONLY); + if (r == -1) + err(EXIT_FAILURE, "Couldn't open file '%s'", file); + error = fstat(r, &st); + if (error == -1) + err(EXIT_FAILURE, "fstat() failed"); + if (S_ISDIR(st.st_mode)) + errx(EXIT_FAILURE, "'%s' is a directory", file); + fp = fdopen(r, "r"); + if (fp == NULL) + err(EXIT_FAILURE, "fdopen() failed"); + osz = 1024; + o = calloc(1, osz); + if (o == NULL) + err(EXIT_FAILURE, "Couldn't allocate memory"); + /* ELF note section header. */ + 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"); + if (pp == NULL) + errx(EXIT_FAILURE, "popen() failed"); + free(cmd); + len = fread(o, osz, 1, pp); + pclose(pp); + r = sscanf(o, "%d%d%d%d%d", &off, &size, &t1, &t2, &align); + free(o); + 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; 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. 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); +} |