From 498267851d48ee60376dc96411fb8693a5e95a3c Mon Sep 17 00:00:00 2001 From: Guido Guenther Date: Wed, 21 Nov 2007 16:55:40 +0100 Subject: remove unneeded e2fslib --- e2fslib/util/subst.c | 374 --------------------------------------------------- 1 file changed, 374 deletions(-) delete mode 100644 e2fslib/util/subst.c (limited to 'e2fslib/util/subst.c') diff --git a/e2fslib/util/subst.c b/e2fslib/util/subst.c deleted file mode 100644 index 7b7ba83..0000000 --- a/e2fslib/util/subst.c +++ /dev/null @@ -1,374 +0,0 @@ -/* - * subst.c --- substitution program - * - * Subst is used as a quicky program to do @ substitutions - * - */ - -#include -#include -#include -#include -#include -#include - -#ifdef HAVE_GETOPT_H -#include -#else -extern char *optarg; -extern int optind; -#endif - - -struct subst_entry { - char *name; - char *value; - struct subst_entry *next; -}; - -struct subst_entry *subst_table = 0; - -static int add_subst(char *name, char *value) -{ - struct subst_entry *ent = 0; - int retval; - - retval = ENOMEM; - ent = (struct subst_entry *) malloc(sizeof(struct subst_entry)); - if (!ent) - goto fail; - ent->name = (char *) malloc(strlen(name)+1); - if (!ent->name) - goto fail; - ent->value = (char *) malloc(strlen(value)+1); - if (!ent->value) - goto fail; - strcpy(ent->name, name); - strcpy(ent->value, value); - ent->next = subst_table; - subst_table = ent; - return 0; -fail: - if (ent) { - if (ent->name) - free(ent->name); - if (ent->value) - free(ent->value); - free(ent); - } - return retval; -} - -static struct subst_entry *fetch_subst_entry(char *name) -{ - struct subst_entry *ent; - - for (ent = subst_table; ent; ent = ent->next) { - if (strcmp(name, ent->name) == 0) - break; - } - return ent; -} - -/* - * Given the starting and ending position of the replacement name, - * check to see if it is valid, and pull it out if it is. - */ -static char *get_subst_symbol(const char *begin, int len, char prefix) -{ - static char replace_name[128]; - char *cp, *start; - - start = replace_name; - if (prefix) - *start++ = prefix; - - if (len > sizeof(replace_name)-2) - return NULL; - memcpy(start, begin, len); - start[len] = 0; - - /* - * The substitution variable must all be in the of [0-9A-Za-z_]. - * If it isn't, this must be an invalid symbol name. - */ - for (cp = start; *cp; cp++) { - if (!(*cp >= 'a' && *cp <= 'z') && - !(*cp >= 'A' && *cp <= 'Z') && - !(*cp >= '0' && *cp <= '9') && - !(*cp == '_')) - return NULL; - } - return (replace_name); -} - -static void replace_string(char *begin, char *end, char *newstr) -{ - int replace_len, len; - - replace_len = strlen(newstr); - len = end - begin; - if (replace_len == 0) - memmove(begin, end+1, strlen(end)+1); - else if (replace_len != len+1) - memmove(end+(replace_len-len-1), end, - strlen(end)+1); - memcpy(begin, newstr, replace_len); -} - -static void substitute_line(char *line) -{ - char *ptr, *name_ptr, *end_ptr; - struct subst_entry *ent; - char *replace_name; - int len; - - /* - * Expand all @FOO@ substitutions - */ - ptr = line; - while (ptr) { - name_ptr = strchr(ptr, '@'); - if (!name_ptr) - break; /* No more */ - if (*(++name_ptr) == '@') { - /* - * Handle tytso@@mit.edu --> tytso@mit.edu - */ - memmove(name_ptr-1, name_ptr, strlen(name_ptr)+1); - ptr = name_ptr+1; - continue; - } - end_ptr = strchr(name_ptr, '@'); - if (!end_ptr) - break; - len = end_ptr - name_ptr; - replace_name = get_subst_symbol(name_ptr, len, 0); - if (!replace_name) { - ptr = name_ptr; - continue; - } - ent = fetch_subst_entry(replace_name); - if (!ent) { - fprintf(stderr, "Unfound expansion: '%s'\n", - replace_name); - ptr = end_ptr + 1; - continue; - } -#if 0 - fprintf(stderr, "Replace name = '%s' with '%s'\n", - replace_name, ent->value); -#endif - ptr = name_ptr-1; - replace_string(ptr, end_ptr, ent->value); - } - /* - * Now do a second pass to expand ${FOO} - */ - ptr = line; - while (ptr) { - name_ptr = strchr(ptr, '$'); - if (!name_ptr) - break; /* No more */ - if (*(++name_ptr) != '{') { - ptr = name_ptr; - continue; - } - name_ptr++; - end_ptr = strchr(name_ptr, '}'); - if (!end_ptr) - break; - len = end_ptr - name_ptr; - replace_name = get_subst_symbol(name_ptr, len, '$'); - if (!replace_name) { - ptr = name_ptr; - continue; - } - ent = fetch_subst_entry(replace_name); - if (!ent) { - ptr = end_ptr + 1; - continue; - } -#if 0 - fprintf(stderr, "Replace name = '%s' with '%s'\n", - replace_name, ent->value); -#endif - ptr = name_ptr-2; - replace_string(ptr, end_ptr, ent->value); - } -} - -static void parse_config_file(FILE *f) -{ - char line[2048]; - char *cp, *ptr; - - while (!feof(f)) { - memset(line, 0, sizeof(line)); - if (fgets(line, sizeof(line), f) == NULL) - break; - /* - * Strip newlines and comments. - */ - cp = strchr(line, '\n'); - if (cp) - *cp = 0; - cp = strchr(line, '#'); - if (cp) - *cp = 0; - /* - * Skip trailing and leading whitespace - */ - for (cp = line + strlen(line) - 1; cp >= line; cp--) { - if (*cp == ' ' || *cp == '\t') - *cp = 0; - else - break; - } - cp = line; - while (*cp && isspace(*cp)) - cp++; - ptr = cp; - /* - * Skip empty lines - */ - if (*ptr == 0) - continue; - /* - * Ignore future extensions - */ - if (*ptr == '@') - continue; - /* - * Parse substitutions - */ - for (cp = ptr; *cp; cp++) - if (isspace(*cp)) - break; - *cp = 0; - for (cp++; *cp; cp++) - if (!isspace(*cp)) - break; -#if 0 - printf("Substitute: '%s' for '%s'\n", ptr, cp ? cp : ""); -#endif - add_subst(ptr, cp); - } -} - -/* - * Return 0 if the files are different, 1 if the files are the same. - */ -static int compare_file(const char *outfn, const char *newfn) -{ - FILE *old_f, *new_f; - char oldbuf[2048], newbuf[2048], *oldcp, *newcp; - int retval; - - old_f = fopen(outfn, "r"); - if (!old_f) - return 0; - new_f = fopen(newfn, "r"); - if (!new_f) - return 0; - - while (1) { - oldcp = fgets(oldbuf, sizeof(oldbuf), old_f); - newcp = fgets(newbuf, sizeof(newbuf), new_f); - if (!oldcp && !newcp) { - retval = 1; - break; - } - if (!oldcp || !newcp || strcmp(oldbuf, newbuf)) { - retval = 0; - break; - } - } - fclose(old_f); - fclose(new_f); - return retval; -} - - - - -int main(int argc, char **argv) -{ - char line[2048]; - int c; - FILE *in, *out; - char *outfn = NULL, *newfn = NULL; - int verbose = 0; - - while ((c = getopt (argc, argv, "f:v")) != EOF) { - switch (c) { - case 'f': - in = fopen(optarg, "r"); - if (!in) { - perror(optarg); - exit(1); - } - parse_config_file(in); - fclose(in); - break; - case 'v': - verbose++; - break; - default: - fprintf(stderr, "%s: [-f config-file] [file]\n", - argv[0]); - break; - } - } - if (optind < argc) { - in = fopen(argv[optind], "r"); - if (!in) { - perror(argv[optind]); - exit(1); - } - optind++; - } else - in = stdin; - - if (optind < argc) { - outfn = argv[optind]; - newfn = (char *) malloc(strlen(outfn)+20); - if (!newfn) { - fprintf(stderr, "Memory error! Exiting.\n"); - exit(1); - } - strcpy(newfn, outfn); - strcat(newfn, ".new"); - out = fopen(newfn, "w"); - if (!out) { - perror(newfn); - exit(1); - } - } else { - out = stdout; - outfn = 0; - } - - while (!feof(in)) { - if (fgets(line, sizeof(line), in) == NULL) - break; - substitute_line(line); - fputs(line, out); - } - fclose(in); - fclose(out); - if (outfn) { - if (compare_file(outfn, newfn)) { - if (verbose) - printf("No change, keeping %s.\n", outfn); - unlink(newfn); - } else { - if (verbose) - printf("Creating or replacing %s.\n", outfn); - rename(newfn, outfn); - } - } - return (0); -} - - -- cgit v1.2.3