X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=mymail.c;h=5b821bc56f859c722037fe7688edae953697dcd5;hb=234fd9058ed477559401bd581d7dbf78ce08e3a5;hp=c24c701cf487d7b971758a44786e562517794362;hpb=d6081facd85f846089fa90fb7a24eb2c2dfb2d28;p=mymail.git diff --git a/mymail.c b/mymail.c index c24c701..5b821bc 100644 --- a/mymail.c +++ b/mymail.c @@ -21,8 +21,13 @@ /* - To use it as a super-history-search for bash: - mymail --bash <(history) + This command is a dumb mail indexer. It can either (1) scan + directories containing mbox files, and create a db file containing + for each mail a list of fields computed from the header, or (2) + read such a db file and get all the mails matching regexp-defined + conditions on the fields. + + It is low-tech, simple, light and fast. */ @@ -37,11 +42,36 @@ #include #include #include +#include #define VERSION "0.1" #define BUFFER_SIZE 16384 +struct parsable_field { + char *name; + char *regexp_string; + regex_t regexp; +}; + +char *db_filename; +char *search_pattern; + +int paranoid; +int action_index; + +char *segment_next_field(char *current) { + while(*current && *current != ' ') current++; + *current = '\0'; current++; + while(*current && *current == ' ') current++; + return current; +} + +void remove_eof(char *c) { + while(*c && *c != '\n' && *c != '\r') c++; + *c = '\0'; +} + /********************************************************************/ /* malloc with error checking. */ @@ -66,38 +96,123 @@ void usage(FILE *out) { fprintf(out, "\n"); } -void read_file(const char *input_filename) { +/*********************************************************************/ + +void search_in_db(const char *search_name, const char *search_regexp_string, + FILE *db_file) { + char raw_line[BUFFER_SIZE]; + char current_mail_filename[BUFFER_SIZE]; + unsigned long int current_position_in_mail; + char *name, *value; + regex_t regexp; + int already_written; + + if(regcomp(®exp, + search_regexp_string, + REG_ICASE)) { + fprintf(stderr, + "mymail: Syntax error in regexp \"%s\" for field \"%s\".\n", + search_regexp_string, + search_name); + exit(EXIT_FAILURE); + } + + current_position_in_mail = 0; + already_written = 0; + + while(fgets(raw_line, BUFFER_SIZE, db_file)) { + name = raw_line; + value = segment_next_field(raw_line); + + if(strcmp("mail", name) == 0) { + char *position_in_file_string = value; + char *mail_filename = segment_next_field(value); + current_position_in_mail = atol(position_in_file_string); + strcpy(current_mail_filename, mail_filename); + remove_eof(current_mail_filename); + already_written = 0; + } + + else if(!already_written) { + if(strcmp(search_name, name) == 0 && regexec(®exp, value, 0, 0, 0) == 0) { + FILE *mail_file; + mail_file = fopen(current_mail_filename, "r"); + if(!mail_file) { + fprintf(stderr, "mymail: Can not open `%s'.\n", current_mail_filename); + exit(EXIT_FAILURE); + } + fseek(mail_file, current_position_in_mail, SEEK_SET); + if(fgets(raw_line, BUFFER_SIZE, mail_file)) { + printf("%s", raw_line); + while(fgets(raw_line, BUFFER_SIZE, mail_file) && + strncmp(raw_line, "From ", 5)) { + printf("%s", raw_line); + } + } + fclose(mail_file); + already_written = 1; + } + } + } + + regfree(®exp); +} + +/*********************************************************************/ +void read_file(const char *input_filename, + int nb_fields_to_parse, struct parsable_field *fields_to_parse, + FILE *db_file) { char raw_line[BUFFER_SIZE]; - char *s; FILE *file; - int in_header; + int in_header, new_header; + unsigned long int position_in_file; file = fopen(input_filename, "r"); if(!file) { fprintf(stderr, "mymail: Can not open `%s'.\n", input_filename); - exit(EXIT_FAILURE); + if(paranoid) { exit(EXIT_FAILURE); } + return; } in_header = 0; + new_header = 0; + + position_in_file = 0; while(fgets(raw_line, BUFFER_SIZE, file)) { if(strncmp(raw_line, "From ", 5) == 0) { if(in_header) { - fprintf(stderr, "Got a 'From ' in the header.\n"); - exit(EXIT_FAILURE); + fprintf(stderr, + "Got a ^\"From \" in the header in %s:%lu.\n", + input_filename, position_in_file); + fprintf(stderr, "%s", raw_line); + if(paranoid) { exit(EXIT_FAILURE); } } in_header = 1; + new_header = 1; } else if(strncmp(raw_line, "\n", 1) == 0) { if(in_header) { in_header = 0; } } if(in_header) { - printf("LINE.H %s", raw_line); - } else { - printf("LINE.B %s", raw_line); + int f; + regmatch_t matches; + if(new_header) { + fprintf(db_file, "mail %lu %s\n", position_in_file, input_filename); + new_header = 0; + } + for(f = 0; f < nb_fields_to_parse; f++) { + if(regexec(&fields_to_parse[f].regexp, raw_line, 1, &matches, 0) == 0) { + fprintf(db_file, "%s %s", + fields_to_parse[f].name, + raw_line + matches.rm_eo); + } + } } + + position_in_file += strlen(raw_line); } fclose(file); @@ -105,25 +220,25 @@ void read_file(const char *input_filename) { int ignore_entry(const char *name) { return - strcmp(name, ".") == 0 || - strcmp(name, "..") == 0 || + /* strcmp(name, ".") == 0 || */ + /* strcmp(name, "..") == 0 || */ (name[0] == '.' && name[1] != '/'); } -void process_dir(const char *dir_name) { +void process_entry(const char *dir_name, + int nb_fields_to_parse, struct parsable_field *fields_to_parse, + FILE *db_file) { DIR *dir; struct dirent *dir_e; struct stat sb; char subname[PATH_MAX + 1]; if(lstat(dir_name, &sb) != 0) { - fprintf(stderr, "mymail: Can not stat \"%s\": %s\n", dir_name, strerror(errno)); + fprintf(stderr, + "mymail: Can not stat \"%s\": %s\n", + dir_name, + strerror(errno)); exit(EXIT_FAILURE); - } else { - } - - if(S_ISLNK(sb.st_mode)) { - return; } dir = opendir(dir_name); @@ -133,15 +248,12 @@ void process_dir(const char *dir_name) { while((dir_e = readdir(dir))) { if(!ignore_entry(dir_e->d_name)) { snprintf(subname, PATH_MAX, "%s/%s", dir_name, dir_e->d_name); - process_dir(subname); + process_entry(subname, nb_fields_to_parse, fields_to_parse, db_file); } } closedir(dir); } else { - if(S_ISREG(sb.st_mode)) { - printf("Processing regular file '%s'.\n", dir_name); - read_file(dir_name); - } + read_file(dir_name, nb_fields_to_parse, fields_to_parse, db_file); } } @@ -156,16 +268,39 @@ enum static struct option long_options[] = { { "help", no_argument, 0, 'h' }, + { "db-prefix", 1, 0, 'p' }, + { "search-pattern", 1, 0, 's' }, + { "index", 0, 0, 'i' }, { 0, 0, 0, 0 } }; +static struct parsable_field fields_to_parse[] = { + { + "from", + "^\\([Ff][Rr][Oo][Mm]:\\|From\\) *", + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } + }, + + { + "dest", + "^\\([Tt][Oo]\\|[Cc][Cc]\\|[Bb][Cc][Cc]\\): *", + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } + }, +}; + int main(int argc, char **argv) { int error = 0, show_help = 0; + const int nb_fields_to_parse = sizeof(fields_to_parse) / sizeof(struct parsable_field); char c; + int f; + + paranoid = 0; + action_index = 0; + search_pattern = 0; setlocale(LC_ALL, ""); - while ((c = getopt_long(argc, argv, "o:s:x:vwmqf:ibzdeajyunt:r:l:c:-h", + while ((c = getopt_long(argc, argv, "hip:s:", long_options, NULL)) != -1) { switch(c) { @@ -174,12 +309,32 @@ int main(int argc, char **argv) { show_help = 1; break; + case 'i': + action_index = 1; + break; + + case 'p': + db_filename = strdup(optarg); + break; + + case 's': + if(search_pattern) { + fprintf(stderr, "mymail: Search pattern already defined.\n"); + exit(EXIT_FAILURE); + } + search_pattern = strdup(optarg); + break; + default: error = 1; break; } } + if(!db_filename) { + db_filename = strdup("/tmp/mymail"); + } + if(error) { usage(stderr); exit(EXIT_FAILURE); @@ -190,10 +345,77 @@ int main(int argc, char **argv) { exit(EXIT_SUCCESS); } - while(optind < argc) { - process_dir(argv[optind]); - optind++; + if(action_index) { + FILE *db_file = fopen(db_filename, "w"); + if(!db_file) { + fprintf(stderr, + "mymail: Can not open \"%s\" for writing: %s\n", + db_filename, + strerror(errno)); + exit(EXIT_FAILURE); + } + + for(f = 0; f < nb_fields_to_parse; f++) { + if(regcomp(&fields_to_parse[f].regexp, + fields_to_parse[f].regexp_string, + REG_ICASE)) { + fprintf(stderr, + "mymail: Syntax error in regexp \"%s\" for field \"%s\".\n", + fields_to_parse[f].regexp_string, + fields_to_parse[f].name); + exit(EXIT_FAILURE); + } + } + + while(optind < argc) { + process_entry(argv[optind], + nb_fields_to_parse, fields_to_parse, db_file); + optind++; + } + + fclose(db_file); + + for(f = 0; f < nb_fields_to_parse; f++) { + regfree(&fields_to_parse[f].regexp); + } + } + + else { + if(search_pattern) { + FILE *db_file; + char *search_name; + char *search_regexp_string; + search_name = search_pattern; + search_regexp_string = segment_next_field(search_pattern); + if(!*search_regexp_string) { + fprintf(stderr, + "Syntax error in the search pattern.\n"); + exit(EXIT_FAILURE); + } + + /* printf("Starting search in %s for field \"%s\" matching \"%s\".\n", */ + /* db_filename, */ + /* search_name, */ + /* search_regexp_string); */ + + db_file = fopen(db_filename, "r"); + + if(!db_file) { + fprintf(stderr, + "mymail: Can not open \"%s\" for reading: %s\n", + db_filename, + strerror(errno)); + exit(EXIT_FAILURE); + } + + search_in_db(search_name, search_regexp_string, db_file); + + fclose(db_file); + free(search_pattern); + } } + free(db_filename); + exit(EXIT_SUCCESS); }