subst.c revision 45e338f5332a54295893dba2e32cc093d1316f60
144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o/* 244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * subst.c --- substitution program 344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * 444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Subst is used as a quicky program to do @ substitutions 5efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <stdio.h> 944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <errno.h> 1044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <stdlib.h> 1144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <unistd.h> 1244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <string.h> 1344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <ctype.h> 14dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o#include <sys/types.h> 15dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o#include <sys/stat.h> 16f932ed925c3bc8f253240d43c7f8e6edd3aa4d5fMatthias Andree#include <time.h> 17dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o#include <utime.h> 1844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 1944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#ifdef HAVE_GETOPT_H 2044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#include <getopt.h> 21691d3353c21a9c8c38d57440808ad7a53827b7dcTheodore Ts'o#else 22691d3353c21a9c8c38d57440808ad7a53827b7dcTheodore Ts'oextern char *optarg; 23691d3353c21a9c8c38d57440808ad7a53827b7dcTheodore Ts'oextern int optind; 2444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#endif 2544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 2644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 2744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostruct subst_entry { 2844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char *name; 2944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char *value; 3044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o struct subst_entry *next; 3144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o}; 3244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 3344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostruct subst_entry *subst_table = 0; 3444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 3544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostatic int add_subst(char *name, char *value) 3644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 3744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o struct subst_entry *ent = 0; 3844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o int retval; 39efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 4044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o retval = ENOMEM; 4145d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o ent = (struct subst_entry *) malloc(sizeof(struct subst_entry)); 4244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!ent) 4344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o goto fail; 4445d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o ent->name = (char *) malloc(strlen(name)+1); 4544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!ent->name) 4644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o goto fail; 4745d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o ent->value = (char *) malloc(strlen(value)+1); 4844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!ent->value) 4944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o goto fail; 5044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o strcpy(ent->name, name); 5144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o strcpy(ent->value, value); 5244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o ent->next = subst_table; 5344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o subst_table = ent; 5444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return 0; 5544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ofail: 5644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (ent) { 5745e338f5332a54295893dba2e32cc093d1316f60Jim Meyering free(ent->name); 5845e338f5332a54295893dba2e32cc093d1316f60Jim Meyering free(ent->value); 5944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o free(ent); 6044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 6144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return retval; 6244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 6344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 6444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostatic struct subst_entry *fetch_subst_entry(char *name) 6544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 6644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o struct subst_entry *ent; 6744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 6844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o for (ent = subst_table; ent; ent = ent->next) { 6944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (strcmp(name, ent->name) == 0) 7044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 7144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 7244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return ent; 7344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 7444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 75e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o/* 76e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * Given the starting and ending position of the replacement name, 77e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * check to see if it is valid, and pull it out if it is. 78e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o */ 79544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'ostatic char *get_subst_symbol(const char *begin, size_t len, char prefix) 80e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o{ 81e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o static char replace_name[128]; 82e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o char *cp, *start; 83e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o 84e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o start = replace_name; 85e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (prefix) 86e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o *start++ = prefix; 87e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o 88e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (len > sizeof(replace_name)-2) 89e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o return NULL; 90e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o memcpy(start, begin, len); 91e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o start[len] = 0; 92efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 93e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o /* 947822c1d410a1c6e98f8367de7593ca6e52df1f37Theodore Ts'o * The substitution variable must all be in the of [0-9A-Za-z_]. 95e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * If it isn't, this must be an invalid symbol name. 96e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o */ 97e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o for (cp = start; *cp; cp++) { 98e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!(*cp >= 'a' && *cp <= 'z') && 99e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o !(*cp >= 'A' && *cp <= 'Z') && 1007822c1d410a1c6e98f8367de7593ca6e52df1f37Theodore Ts'o !(*cp >= '0' && *cp <= '9') && 101e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o !(*cp == '_')) 102e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o return NULL; 103e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 104e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o return (replace_name); 105e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o} 106e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o 107e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'ostatic void replace_string(char *begin, char *end, char *newstr) 108e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o{ 109e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o int replace_len, len; 110e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o 111e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_len = strlen(newstr); 112e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o len = end - begin; 113913c4e9f1445cd8e10b9342def39eee2a29dcfd0Theodore Ts'o if (replace_len == 0) 114913c4e9f1445cd8e10b9342def39eee2a29dcfd0Theodore Ts'o memmove(begin, end+1, strlen(end)+1); 115913c4e9f1445cd8e10b9342def39eee2a29dcfd0Theodore Ts'o else if (replace_len != len+1) 116e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o memmove(end+(replace_len-len-1), end, 117e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o strlen(end)+1); 118e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o memcpy(begin, newstr, replace_len); 119e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o} 120e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o 12144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostatic void substitute_line(char *line) 12244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 123cdceb0496f7ae23f685a409ab070f3431bcad520Theodore Ts'o char *ptr, *name_ptr, *end_ptr; 12444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o struct subst_entry *ent; 125e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o char *replace_name; 126544349270e4c74a6feb971123884a8cf5052a7eeTheodore Ts'o size_t len; 12744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 128e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o /* 129e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * Expand all @FOO@ substitutions 130e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o */ 13144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o ptr = line; 13244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o while (ptr) { 13344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o name_ptr = strchr(ptr, '@'); 13444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!name_ptr) 135e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o break; /* No more */ 136e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (*(++name_ptr) == '@') { 137e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o /* 138e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * Handle tytso@@mit.edu --> tytso@mit.edu 139e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o */ 140e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o memmove(name_ptr-1, name_ptr, strlen(name_ptr)+1); 141e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr+1; 142e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o continue; 143e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 144e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o end_ptr = strchr(name_ptr, '@'); 14544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!end_ptr) 14644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 147e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o len = end_ptr - name_ptr; 148e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_name = get_subst_symbol(name_ptr, len, 0); 149e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!replace_name) { 150e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr; 151e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o continue; 152e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 15344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o ent = fetch_subst_entry(replace_name); 15444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!ent) { 155efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o fprintf(stderr, "Unfound expansion: '%s'\n", 15644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o replace_name); 15744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o ptr = end_ptr + 1; 15844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o continue; 15944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 16044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#if 0 16144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fprintf(stderr, "Replace name = '%s' with '%s'\n", 16244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o replace_name, ent->value); 16344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#endif 164e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr-1; 165e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_string(ptr, end_ptr, ent->value); 16698224fbc1db8387da1fe0fd1bb3be25c18be2e98Theodore Ts'o if ((ent->value[0] == '@') && 16798224fbc1db8387da1fe0fd1bb3be25c18be2e98Theodore Ts'o (strlen(replace_name) == strlen(ent->value)-2) && 168efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o !strncmp(replace_name, ent->value+1, 16998224fbc1db8387da1fe0fd1bb3be25c18be2e98Theodore Ts'o strlen(ent->value)-2)) 17098224fbc1db8387da1fe0fd1bb3be25c18be2e98Theodore Ts'o /* avoid an infinite loop */ 17198224fbc1db8387da1fe0fd1bb3be25c18be2e98Theodore Ts'o ptr += strlen(ent->value); 172e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 173e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o /* 174e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o * Now do a second pass to expand ${FOO} 175e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o */ 176e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = line; 177e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o while (ptr) { 178e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o name_ptr = strchr(ptr, '$'); 179e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!name_ptr) 180e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o break; /* No more */ 181e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (*(++name_ptr) != '{') { 182e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr; 183e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o continue; 184e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 185e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o name_ptr++; 186e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o end_ptr = strchr(name_ptr, '}'); 187e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!end_ptr) 188e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o break; 189e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o len = end_ptr - name_ptr; 190e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_name = get_subst_symbol(name_ptr, len, '$'); 191e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!replace_name) { 192e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr; 193e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o continue; 194efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o } 195e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ent = fetch_subst_entry(replace_name); 196e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (!ent) { 197e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = end_ptr + 1; 198e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o continue; 199e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o } 200e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o#if 0 201e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o fprintf(stderr, "Replace name = '%s' with '%s'\n", 202e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_name, ent->value); 203e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o#endif 204e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o ptr = name_ptr-2; 205e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o replace_string(ptr, end_ptr, ent->value); 20644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 20744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 20844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 20944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostatic void parse_config_file(FILE *f) 21044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 21144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char line[2048]; 21244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char *cp, *ptr; 21344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 21444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o while (!feof(f)) { 21544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o memset(line, 0, sizeof(line)); 21644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (fgets(line, sizeof(line), f) == NULL) 21744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 21844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o /* 21944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Strip newlines and comments. 22044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 22144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o cp = strchr(line, '\n'); 22244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (cp) 22344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o *cp = 0; 22444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o cp = strchr(line, '#'); 22544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (cp) 22644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o *cp = 0; 22744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o /* 22844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Skip trailing and leading whitespace 22944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 23044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o for (cp = line + strlen(line) - 1; cp >= line; cp--) { 23144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (*cp == ' ' || *cp == '\t') 23244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o *cp = 0; 23344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o else 23444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 23544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 23644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o cp = line; 23744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o while (*cp && isspace(*cp)) 23844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o cp++; 23944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o ptr = cp; 24044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o /* 24144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Skip empty lines 24244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 24344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (*ptr == 0) 24444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o continue; 24544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o /* 24644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Ignore future extensions 24744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 248e7549ca6280abe5ab5c1934ecfd7d132c7abeb59Theodore Ts'o if (*ptr == '@') 24944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o continue; 25044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o /* 25144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Parse substitutions 25244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 25344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o for (cp = ptr; *cp; cp++) 25444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (isspace(*cp)) 25544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 25644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o *cp = 0; 25744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o for (cp++; *cp; cp++) 25844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!isspace(*cp)) 25944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 26044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#if 0 261913c4e9f1445cd8e10b9342def39eee2a29dcfd0Theodore Ts'o printf("Substitute: '%s' for '%s'\n", ptr, cp ? cp : "<NULL>"); 26244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o#endif 26344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o add_subst(ptr, cp); 26444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 26544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 26644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 26744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o/* 26844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o * Return 0 if the files are different, 1 if the files are the same. 26944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o */ 27044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'ostatic int compare_file(const char *outfn, const char *newfn) 27144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 27245d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o FILE *old_f, *new_f; 27344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char oldbuf[2048], newbuf[2048], *oldcp, *newcp; 27444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o int retval; 27544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 27645d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o old_f = fopen(outfn, "r"); 27745d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o if (!old_f) 27844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return 0; 27945d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o new_f = fopen(newfn, "r"); 280f1d6a0797b13c1b1c364ab4ee9b500e5455aeeebBrian Behlendorf if (!new_f) { 281f1d6a0797b13c1b1c364ab4ee9b500e5455aeeebBrian Behlendorf fclose(old_f); 28244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return 0; 283f1d6a0797b13c1b1c364ab4ee9b500e5455aeeebBrian Behlendorf } 28444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 28544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o while (1) { 28645d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o oldcp = fgets(oldbuf, sizeof(oldbuf), old_f); 28745d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o newcp = fgets(newbuf, sizeof(newbuf), new_f); 28844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!oldcp && !newcp) { 28944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o retval = 1; 29044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 29144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 29244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!oldcp || !newcp || strcmp(oldbuf, newbuf)) { 29344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o retval = 0; 29444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 29544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 29644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 29745d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o fclose(old_f); 29845d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o fclose(new_f); 29944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return retval; 30044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 30144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 30244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 30344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 30444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'oint main(int argc, char **argv) 30544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o{ 30644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char line[2048]; 30744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o int c; 30844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o FILE *in, *out; 30944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o char *outfn = NULL, *newfn = NULL; 31044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o int verbose = 0; 311dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o int adjust_timestamp = 0; 312dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o struct stat stbuf; 313dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o struct utimbuf ut; 314efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 315dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o while ((c = getopt (argc, argv, "f:tv")) != EOF) { 31644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o switch (c) { 31744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o case 'f': 31844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o in = fopen(optarg, "r"); 31944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!in) { 32044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o perror(optarg); 32144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o exit(1); 32244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 32344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o parse_config_file(in); 32444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fclose(in); 32544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 326dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o case 't': 327dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o adjust_timestamp++; 328dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o break; 32944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o case 'v': 33044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o verbose++; 33144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 33244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o default: 333efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o fprintf(stderr, "%s: [-f config-file] [file]\n", 33444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o argv[0]); 33544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 33644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 33744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 33844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (optind < argc) { 33944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o in = fopen(argv[optind], "r"); 34044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!in) { 34144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o perror(argv[optind]); 34244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o exit(1); 34344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 34444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o optind++; 34544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } else 34644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o in = stdin; 347efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 34844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (optind < argc) { 34944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o outfn = argv[optind]; 35045d2161466e32b3e67115951ab1eb7eef25c218aTheodore Ts'o newfn = (char *) malloc(strlen(outfn)+20); 35144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!newfn) { 35244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fprintf(stderr, "Memory error! Exiting.\n"); 35344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o exit(1); 35444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 35544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o strcpy(newfn, outfn); 35644339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o strcat(newfn, ".new"); 35744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o out = fopen(newfn, "w"); 35844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (!out) { 35944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o perror(newfn); 36044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o exit(1); 36144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 36244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } else { 36344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o out = stdout; 36444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o outfn = 0; 36544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 366efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 36744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o while (!feof(in)) { 36844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (fgets(line, sizeof(line), in) == NULL) 36944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o break; 37044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o substitute_line(line); 37144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fputs(line, out); 37244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 37344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fclose(in); 37444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o fclose(out); 37544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (outfn) { 3763f5ef9642bc08bf2a9088a0ec58ec9b0abadf0a6Andreas Dilger struct stat st; 37744339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (compare_file(outfn, newfn)) { 37844339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (verbose) 37944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o printf("No change, keeping %s.\n", outfn); 380dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o if (adjust_timestamp) { 381dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o if (stat(outfn, &stbuf) == 0) { 382dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o if (verbose) 383dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o printf("Updating modtime for %s\n", outfn); 384dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o ut.actime = stbuf.st_atime; 385dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o ut.modtime = time(0); 386dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o if (utime(outfn, &ut) < 0) 387dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o perror("utime"); 388dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o } 389dd60705665b916c9f67c3bbf86aa6bb620a14ecdTheodore Ts'o } 39044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o unlink(newfn); 39144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } else { 39244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o if (verbose) 39344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o printf("Creating or replacing %s.\n", outfn); 39444339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o rename(newfn, outfn); 39544339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 3963f5ef9642bc08bf2a9088a0ec58ec9b0abadf0a6Andreas Dilger /* set read-only to alert user it is a generated file */ 3973f5ef9642bc08bf2a9088a0ec58ec9b0abadf0a6Andreas Dilger if (stat(outfn, &st) == 0) 3983f5ef9642bc08bf2a9088a0ec58ec9b0abadf0a6Andreas Dilger chmod(outfn, st.st_mode & ~0222); 39944339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o } 40044339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o return (0); 40144339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o} 40244339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 40344339bdff87584b72a2ade7d3a1426e3335f2167Theodore Ts'o 404