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author | Philip Hazel <ph10@hermes.cam.ac.uk> | 2004-10-07 10:39:01 +0000 |
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committer | Philip Hazel <ph10@hermes.cam.ac.uk> | 2004-10-07 10:39:01 +0000 |
commit | 059ec3d9952740285fb1ebf47961b8aca2eb1b4a (patch) | |
tree | e86817287b362e728c8d9ce5d890073553e877ae /src/src/buildconfig.c | |
parent | 61ec970df30325dbcd8c9d0f0e431dc793126656 (diff) | |
download | exim4-059ec3d9952740285fb1ebf47961b8aca2eb1b4a.tar.gz |
Start
Diffstat (limited to 'src/src/buildconfig.c')
-rw-r--r-- | src/src/buildconfig.c | 748 |
1 files changed, 748 insertions, 0 deletions
diff --git a/src/src/buildconfig.c b/src/src/buildconfig.c new file mode 100644 index 000000000..6dd0d5112 --- /dev/null +++ b/src/src/buildconfig.c @@ -0,0 +1,748 @@ +/* $Cambridge: exim/src/src/buildconfig.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */ + +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) University of Cambridge 1995 - 2004 */ +/* See the file NOTICE for conditions of use and distribution. */ + + +/************************************************* +* Build configuration header for Exim * +*************************************************/ + +/* This auxiliary program builds the file config.h by the following +process: + +First it reads Makefile, looking for certain OS-specific definitions which it +uses to define macros. Then it reads the defaults file config.h.defaults. + +The defaults file contains normal C #define statements for various macros; if +the name of a macro is found in the environment, the environment value replaces +the default. If the default #define does not contain any value, then that macro +is not copied to the created file unless there is some value in the +environment. + +This program is compiled and run as part of the Make process and is not +normally called independently. */ + + +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <pwd.h> +#include <grp.h> + +typedef struct { + char *name; + int *flag; +} have_item; + +typedef struct { + char *name; + char *data; +} save_item; + +static char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" }; + +static int have_ipv6 = 0; +static int have_iconv = 0; + +static char errno_quota[256]; +static char ostype[256]; +static char cc[256]; + +/* If any entry is an initial substring of another, the longer one must +appear first. */ + +static have_item have_list[] = { + { "HAVE_IPV6", &have_ipv6 }, + { "HAVE_ICONV", &have_iconv }, + { NULL, NULL} +}; + +static save_item save_list[] = { + { "ERRNO_QUOTA", errno_quota }, + { "OSTYPE", ostype }, + { "CC", cc }, + { NULL, NULL} +}; + + +/* Subroutine to check a string for precisely one instance of "%s". If not, +bomb out. */ + +void +check_percent_ess(char *value, char *name) +{ +int OK = 0; +char *p = strstr(value, "%s"); +if (p != NULL) OK = strstr(p+2, "%s") == NULL; +if (!OK) + { + printf("\n*** \"%s\" (%s) must contain precisely one occurrence of\n" + "*** \"%%s\". Please review your build-time configuration.\n\n/", value, + name); + exit(1); + } +} + + +/* Main program */ + +int +main(int argc, char **argv) +{ +FILE *base; +FILE *new; +int last_initial = 'A'; +int linecount = 0; +int have_auth = 0; +int in_local_makefile = 0; +int use_which_db = 0; +int use_which_db_in_local_makefile = 0; +int support_crypteq = 0; +char buffer[1024]; + +if (argc != 1) + { + printf("*** Buildconfig: called with incorrect arguments\n"); + exit(1); + } + +new = fopen("config.h", "wb"); +if (new == NULL) + { + printf("*** Buildconfig: failed to open config.h for output\n"); + exit(1); + } + +printf("Building configuration file config.h\n"); + +fprintf(new, "/*************************************************\n"); +fprintf(new, "* Configuration header for Exim *\n"); +fprintf(new, "*************************************************/\n\n"); + +fprintf(new, "/* This file was automatically generated from Makefile and " + "config.h.defaults,\n"); +fprintf(new, "using values specified in the configuration file Local/Makefile.\n"); +fprintf(new, "Do not edit it. Instead, edit Local/Makefile and " + "rerun make. */\n\n"); + +/* First, search the makefile for certain settings */ + +base = fopen("Makefile", "rb"); +if (base == NULL) + { + printf("*** Buildconfig: failed to open Makefile\n"); + fclose(new); + exit(1); + } + +errno_quota[0] = 0; /* no over-riding value set */ +ostype[0] = 0; /* just in case */ +cc[0] = 0; + +while (fgets(buffer, sizeof(buffer), base) != NULL) + { + int i; + have_item *h; + save_item *s; + char *p = buffer + (int)strlen(buffer); + linecount++; + while (p > buffer && isspace((unsigned char)p[-1])) p--; + *p = 0; + p = buffer; + while (isspace((unsigned char)*p)) p++; + + /* Notice when we hit the user's makefile */ + + if (strcmp(p, "# From Local/Makefile") == 0) + { + in_local_makefile = 1; + continue; + } + + /* Remember the last DB option setting. If we hit two in the user's + Makefile, complain. */ + + for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) + { + int len = (int)strlen(db_opts[i]); + if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '=')) + { + if (in_local_makefile) + { + if (use_which_db_in_local_makefile) + { + printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be " + "defined in Local/Makefile\n"); + exit(1); + } + use_which_db_in_local_makefile = 1; + } + use_which_db = i; + break; + } + } + if (i < sizeof(db_opts)/sizeof(char *)) continue; + + /* Items where we just save a boolean */ + + for (h = have_list; h->name != NULL; h++) + { + int len = (int)strlen(h->name); + if (strncmp(p, h->name, len) == 0) + { + p += len; + while (isspace((unsigned char)*p)) p++; + if (*p++ != '=') + { + printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); + exit(1); + } + while (isspace((unsigned char)*p)) p++; + if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1; + else *(h->flag) = 0; /* Must reset in case multiple instances */ + break; + } + } + + if (h->name != NULL) continue; + + /* Items where we save the complete string */ + + for (s = save_list; s->name != NULL; s++) + { + int len = (int)strlen(s->name); + if (strncmp(p, s->name, len) == 0) + { + p += len; + while (isspace((unsigned char)*p)) p++; + if (*p++ != '=') + { + printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount); + exit(1); + } + while (isspace((unsigned char)*p)) p++; + strcpy(s->data, p); + } + } + } + +fprintf(new, "#define HAVE_IPV6 %s\n", + have_ipv6? "TRUE" : "FALSE"); + +fprintf(new, "#define HAVE_ICONV %s\n", + have_iconv? "TRUE" : "FALSE"); + +if (errno_quota[0] != 0) + fprintf(new, "\n#define ERRNO_QUOTA %s\n", errno_quota); + +if (strcmp(cc, "gcc") == 0 && strstr(ostype, "IRIX") != NULL) + { + fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */"); + fprintf(new, "\n/* bug when using gcc on an IRIX system. */"); + fprintf(new, "\n#define USE_INET_NTOA_FIX"); + } + +fprintf(new, "\n"); +fclose(base); + + +/* Now handle the macros listed in the defaults */ + +base = fopen("../src/config.h.defaults", "rb"); +if (base == NULL) + { + printf("*** Buildconfig: failed to open ../src/config.h.defaults\n"); + fclose(new); + exit(1); + } + +while (fgets(buffer, sizeof(buffer), base) != NULL) + { + int i; + char name[256]; + char *value; + char *p = buffer; + char *q = name; + + while (*p == ' ' || *p == '\t') p++; + + if (strncmp(p, "#define ", 8) != 0) continue; + + p += 8; + while (*p == ' ' || *p == '\t') p++; + + if (*p < last_initial) fprintf(new, "\n"); + last_initial = *p; + + while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++; + *q = 0; + + /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only + one of them set. The scan of the Makefile has saved which was the last one + encountered. */ + + for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++) + { + if (strcmp(name, db_opts[i]) == 0) + { + if (use_which_db == i) + fprintf(new, "#define %s %.*syes\n", db_opts[i], + 21 - (int)strlen(db_opts[i]), " "); + else + fprintf(new, "/* %s not set */\n", name); + break; + } + } + if (i < sizeof(db_opts)/sizeof(char *)) continue; + + /* EXIM_USER is a special case. We look in the environment for EXIM_USER or + EXIM_UID (the latter for backward compatibility with Exim 3). If the value is + not numeric, we look up the user, and default the GID if found. Otherwise, + EXIM_GROUP or EXIM_GID must be in the environment. */ + + if (strcmp(name, "EXIM_UID") == 0) + { + uid_t uid = 0; + gid_t gid = 0; + int gid_set = 0; + char *username = NULL; + char *groupname = NULL; + char *s; + char *user = getenv("EXIM_USER"); + char *group = getenv("EXIM_GROUP"); + + if (user == NULL) user = getenv("EXIM_UID"); + if (group == NULL) group = getenv("EXIM_GID"); + + if (user == NULL) + { + printf("\n*** EXIM_USER has not been defined in any of the Makefiles in " + "the\n \"Local\" directory. Please review your build-time " + "configuration.\n\n"); + return 1; + } + + while (isspace((unsigned char)(*user))) user++; + if (*user == 0) + { + printf("\n*** EXIM_USER is defined as an empty string in one of the " + "files\n in the \"Local\" directory. Please review your build-time" + "\n configuration.\n\n"); + return 1; + } + + for (s = user; *s != 0; s++) + { + if (iscntrl((unsigned char)(*s))) + { + printf("\n*** EXIM_USER contains the control character 0x%02X in one " + "of the files\n in the \"Local\" directory. Please review your " + "build-time\n configuration.\n\n", *s); + return 1; + } + } + + /* Numeric uid given */ + + if (user[strspn(user, "0123456789")] == 0) + { + uid = (uid_t)atoi(user); + } + + /* User name given. Normally, we look up the uid right away. However, + people building binary distributions sometimes want to retain the name till + runtime. This is supported if the name begins "ref:". */ + + else if (strncmp(user, "ref:", 4) == 0) + { + user += 4; + while (isspace(*user)) user++; + username = user; + gid_set = 1; + } + + else + { + struct passwd *pw = getpwnam(user); + if (pw == NULL) + { + printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " + "exist.\n Please review your build-time configuration.\n\n", + user); + return 1; + } + + uid = pw->pw_uid; + gid = pw->pw_gid; + gid_set = 1; + } + + /* Use explicit group if set. */ + + if (group != NULL) + { + while (isspace((unsigned char)(*group))) group++; + if (*group == 0) + { + printf("\n*** EXIM_GROUP is defined as an empty string in one of " + "the files in the\n \"Local\" directory. "); + if (gid_set) + { + printf("If you want the Exim group to be taken from the\n " + "password data for the Exim user, just remove the EXIM_GROUP " + "setting.\n Otherwise, p"); + } + else printf("EXIM_USER is defined numerically, so there is no" + "\n default for EXIM_GROUP and you must set it explicitly.\n P"); + printf("lease review your build-time configuration.\n\n"); + return 1; + } + + for (s = group; *s != 0; s++) + { + if (iscntrl((unsigned char)(*s))) + { + printf("\n*** EXIM_GROUP contains the control character 0x%02X in one " + "of the files\n in the \"Local\" directory. Please review your " + "build-time\n configuration.\n\n", *s); + return 1; + } + } + + /* Group name given. This may be by reference or to be looked up now, + as for user. */ + + if (strncmp(group, "ref:", 4) == 0) + { + group += 4; + while (isspace(*group)) group++; + groupname = group; + } + + else if (username != NULL) + { + groupname = group; + } + + else if (group[strspn(group, "0123456789")] == 0) + { + gid = (gid_t)atoi(group); + } + + else + { + struct group *gr = getgrnam(group); + if (gr == NULL) + { + printf("\n*** Group \"%s\" (specified in one of the Makefiles) does " + "not exist.\n Please review your build-time configuration.\n\n", + group); + return 1; + } + gid = gr->gr_gid; + } + } + + /* Else trouble unless found in passwd file with user */ + + else if (!gid_set) + { + printf("\n*** No group set for Exim. Please review your build-time " + "configuration.\n\n"); + return 1; + } + + /* Output user and group names or uid/gid. When names are set, uid/gid + are set to zero but will be replaced at runtime. */ + + if (username != NULL) + fprintf(new, "#define EXIM_USERNAME \"%s\"\n", username); + if (groupname != NULL) + fprintf(new, "#define EXIM_GROUPNAME \"%s\"\n", groupname); + + fprintf(new, "#define EXIM_UID %d\n", (int)uid); + fprintf(new, "#define EXIM_GID %d\n", (int)gid); + continue; + } + + /* CONFIGURE_OWNER is a special case. We look in the environment for + CONFIGURE_OWNER. If the value is not numeric, we look up the user. A lot of + this code is similar to that for EXIM_USER, but we aren't interested in a gid + here, and it's all optional, so just keep it separate. */ + + if (strcmp(name, "CONFIGURE_OWNER") == 0) + { + uid_t uid = 0; + char *s; + char *username = NULL; + char *user = getenv("CONFIGURE_OWNER"); + + if (user == NULL) user = ""; + while (isspace((unsigned char)(*user))) user++; + if (*user == 0) + { + fprintf(new, "/* %s not set */\n", name); + continue; + } + + for (s = user; *s != 0; s++) + { + if (iscntrl((unsigned char)(*s))) + { + printf("\n*** CONFIGURE_OWNER contains the control character 0x%02X in " + "one of the files\n in the \"Local\" directory. Please review " + "your build-time\n configuration.\n\n", *s); + return 1; + } + } + + /* Numeric uid given */ + + if (user[strspn(user, "0123456789")] == 0) + { + uid = (uid_t)atoi(user); + } + + /* User name given. Normally, we look up the uid right away. However, + people building binary distributions sometimes want to retain the name till + runtime. This is supported if the name begins "ref:". */ + + else if (strncmp(user, "ref:", 4) == 0) + { + user += 4; + while (isspace(*user)) user++; + username = user; + } + + else + { + struct passwd *pw = getpwnam(user); + if (pw == NULL) + { + printf("\n*** User \"%s\" (specified in one of the Makefiles) does not " + "exist.\n Please review your build-time configuration.\n\n", + user); + return 1; + } + + uid = pw->pw_uid; + } + + /* Output user and group names or uid/gid. When names are set, uid/gid + are set to zero but will be replaced at runtime. */ + + if (username != NULL) + fprintf(new, "#define CONFIGURE_OWNERNAME \"%s\"\n", username); + fprintf(new, "#define CONFIGURE_OWNER %d\n", (int)uid); + continue; + } + + /* FIXED_NEVER_USERS is another special case. Look up the uid values and + create suitable initialization data for a vector. */ + + if (strcmp(name, "FIXED_NEVER_USERS") == 0) + { + char *list = getenv("FIXED_NEVER_USERS"); + if (list == NULL) + { + fprintf(new, "#define FIXED_NEVER_USERS 0\n"); + } + else + { + int count = 1; + int i; + uid_t *vector; + char *p = list; + while (*p != 0) if (*p++ == ':') count++; + + vector = malloc((count+1) * sizeof(uid_t)); + vector[0] = (uid_t)count; + + for (i = 1; i <= count; list++, i++) + { + char name[64]; + p = list; + while (*list != 0 && *list != ':') list++; + strncpy(name, p, list-p); + name[list-p] = 0; + + if (name[strspn(name, "0123456789")] == 0) + { + vector[i] = (uid_t)atoi(name); + } + else + { + struct passwd *pw = getpwnam(name); + if (pw == NULL) + { + printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not " + "exist.\n Please review your build-time configuration.\n\n", + name); + return 1; + } + vector[i] = pw->pw_uid; + } + } + fprintf(new, "#define FIXED_NEVER_USERS %d, ", count); + for (i = 1; i <= count - 1; i++) + fprintf(new, "%d, ", (unsigned int)vector[i]); + fprintf(new, "%d\n", (unsigned int)vector[i]); + } + continue; + } + + /* Otherwise, check whether a value exists in the environment. Remember if + it is an AUTH setting or SUPPORT_CRYPTEQ. */ + + if ((value = getenv(name)) != NULL) + { + int len; + len = 21 - (int)strlen(name); + + if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1; + if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1; + + /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */ + + if (strcmp(name, "LDAP_LIB_TYPE") == 0) + { + if (strcmp(value, "NETSCAPE") == 0 || + strcmp(value, "UMICHIGAN") == 0 || + strcmp(value, "OPENLDAP1") == 0 || + strcmp(value, "OPENLDAP2") == 0 || + strcmp(value, "SOLARIS") == 0 || + strcmp(value, "SOLARIS7") == 0) /* Compatibility */ + { + fprintf(new, "#define LDAP_LIB_%s\n", value); + } + else + { + printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type." + "\n*** Please review your build-time configuration.\n\n", value); + return 1; + } + } + + else if (strcmp(name, "RADIUS_LIB_TYPE") == 0) + { + if (strcmp(value, "RADIUSCLIENT") == 0 || + strcmp(value, "RADLIB") == 0) + { + fprintf(new, "#define RADIUS_LIB_%s\n", value); + } + else + { + printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type." + "\n*** Please review your build-time configuration.\n\n", value); + return 1; + } + } + + /* Other macros get set to the environment value. */ + + else + { + fprintf(new, "#define %s ", name); + while(len-- > 0) fputc(' ', new); + + /* LOG_FILE_PATH is now messy because it can be a path containing %s or + it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */ + + if (strcmp(name, "LOG_FILE_PATH") == 0) + { + char *ss = value; + for(;;) + { + char *pp; + char *sss = strchr(ss, ':'); + if (sss != NULL) + { + strncpy(buffer, ss, sss-ss); + buffer[sss-ss] = 0; /* For empty case */ + } + else strcpy(buffer, ss); + pp = buffer + (int)strlen(buffer); + while (pp > buffer && isspace((unsigned char)pp[-1])) pp--; + *pp = 0; + if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0) + check_percent_ess(buffer, name); + if (sss == NULL) break; + ss = sss + 1; + while (isspace((unsigned char)*ss)) ss++; + } + fprintf(new, "\"%s\"\n", value); + } + + /* Timezone values and HEADERS_CHARSET get quoted */ + + else if (strcmp(name, "TIMEZONE_DEFAULT") == 0|| + strcmp(name, "HEADERS_CHARSET") == 0) + fprintf(new, "\"%s\"\n", value); + + /* For others, quote any paths and don't quote anything else */ + + else + { + if (value[0] == '/') fprintf(new, "\"%s\"\n", value); + else fprintf(new, "%s\n", value); + } + } + } + + /* Value not defined in the environment; use the default */ + + else + { + char *t = p; + while (*p == ' ' || *p == '\t') p++; + if (*p != '\n') fputs(buffer, new); else + { + *t = 0; + if (strcmp(name, "BIN_DIRECTORY") == 0 || + strcmp(name, "CONFIGURE_FILE") == 0) + { + printf("\n*** %s has not been defined in any of the Makefiles in the\n" + " \"Local\" directory. " + "Please review your build-time configuration.\n\n", name); + return 1; + } + + if (strcmp(name, "TIMEZONE_DEFAULT") == 0) + { + char *tz = getenv("TZ"); + fprintf(new, "#define TIMEZONE_DEFAULT "); + if (tz == NULL) fprintf(new, "NULL\n"); else + fprintf(new, "\"%s\"\n", tz); + } + + else fprintf(new, "/* %s not set */\n", name); + } + } + } + +fclose(base); + +/* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also +defined. */ + +if (have_auth) + { + if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n" + "#define SUPPORT_CRYPTEQ\n"); + } + +/* End off */ + +fprintf(new, "\n/* End of config.h */\n"); +fclose(new); +return 0; +} + +/* End of buildconfig.c */ |