X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=mymail.c;h=5b821bc56f859c722037fe7688edae953697dcd5;hb=234fd9058ed477559401bd581d7dbf78ce08e3a5;hp=877215cb1d0509e2822ecf1a7864b989b840adb5;hpb=72cd948c9f36ae5e79bf3317aa4e2cda0232c9ee;p=mymail.git diff --git a/mymail.c b/mymail.c index 877215c..5b821bc 100644 --- a/mymail.c +++ b/mymail.c @@ -19,6 +19,18 @@ * */ +/* + + 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. + +*/ + #define _GNU_SOURCE #include @@ -45,8 +57,21 @@ struct parsable_field { 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. */ @@ -76,9 +101,11 @@ void usage(FILE *out) { void search_in_db(const char *search_name, const char *search_regexp_string, FILE *db_file) { char raw_line[BUFFER_SIZE]; - char current_mail[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, @@ -90,26 +117,46 @@ void search_in_db(const char *search_name, const char *search_regexp_string, exit(EXIT_FAILURE); } + current_position_in_mail = 0; + already_written = 0; + while(fgets(raw_line, BUFFER_SIZE, db_file)) { name = raw_line; - value = raw_line; - while(*value && *value != ' ') value++; - *value = '\0'; value++; - while(*value && *value == ' ') value++; - - /* printf("LINE [%s] %s", name, value); */ + value = segment_next_field(raw_line); if(strcmp("mail", name) == 0) { - strcpy(current_mail, value); - /* printf("READING [%s]\n", current_mail); */ - } else { - if(strcmp(search_name, name) == 0 && regexec(®exp, value, 0, 0, 0) == 0) { - printf("%s", current_mail); + 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); +} /*********************************************************************/ @@ -119,13 +166,14 @@ void read_file(const char *input_filename, char raw_line[BUFFER_SIZE]; FILE *file; int in_header, new_header; - unsigned int position_in_file; + 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; @@ -137,10 +185,10 @@ void read_file(const char *input_filename, if(strncmp(raw_line, "From ", 5) == 0) { if(in_header) { fprintf(stderr, - "Got a 'From ' in the header in %s:%u.\n", + "Got a ^\"From \" in the header in %s:%lu.\n", input_filename, position_in_file); fprintf(stderr, "%s", raw_line); - exit(EXIT_FAILURE); + if(paranoid) { exit(EXIT_FAILURE); } } in_header = 1; new_header = 1; @@ -148,17 +196,11 @@ void read_file(const char *input_filename, if(in_header) { in_header = 0; } } - /* if(in_header) { */ - /* printf("LINE.H %s", raw_line); */ - /* } else { */ - /* printf("LINE.B %s", raw_line); */ - /* } */ - if(in_header) { int f; regmatch_t matches; if(new_header) { - fprintf(db_file, "mail %s:%d\n", input_filename, position_in_file); + fprintf(db_file, "mail %lu %s\n", position_in_file, input_filename); new_header = 0; } for(f = 0; f < nb_fields_to_parse; f++) { @@ -178,8 +220,8 @@ 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] != '/'); } @@ -197,11 +239,6 @@ void process_entry(const char *dir_name, dir_name, strerror(errno)); exit(EXIT_FAILURE); - } else { - } - - if(S_ISLNK(sb.st_mode)) { - return; } dir = opendir(dir_name); @@ -216,10 +253,7 @@ void process_entry(const char *dir_name, } closedir(dir); } else { - if(S_ISREG(sb.st_mode)) { - /* printf("Processing regular file '%s'.\n", dir_name); */ - read_file(dir_name, nb_fields_to_parse, fields_to_parse, db_file); - } + read_file(dir_name, nb_fields_to_parse, fields_to_parse, db_file); } } @@ -260,6 +294,7 @@ int main(int argc, char **argv) { char c; int f; + paranoid = 0; action_index = 0; search_pattern = 0; @@ -284,8 +319,7 @@ int main(int argc, char **argv) { case 's': if(search_pattern) { - fprintf(stderr, - "mymail: Search pattern already defined.\n"); + fprintf(stderr, "mymail: Search pattern already defined.\n"); exit(EXIT_FAILURE); } search_pattern = strdup(optarg); @@ -352,20 +386,17 @@ int main(int argc, char **argv) { char *search_name; char *search_regexp_string; search_name = search_pattern; - search_regexp_string = search_pattern; - while(*search_regexp_string && *search_regexp_string != ' ') search_regexp_string++; - *search_regexp_string = '\0'; search_regexp_string++; - while(*search_regexp_string && *search_regexp_string == ' ') search_regexp_string++; + 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); + /* printf("Starting search in %s for field \"%s\" matching \"%s\".\n", */ + /* db_filename, */ + /* search_name, */ + /* search_regexp_string); */ db_file = fopen(db_filename, "r"); @@ -376,6 +407,7 @@ int main(int argc, char **argv) { strerror(errno)); exit(EXIT_FAILURE); } + search_in_db(search_name, search_regexp_string, db_file); fclose(db_file); @@ -383,5 +415,7 @@ int main(int argc, char **argv) { } } + free(db_filename); + exit(EXIT_SUCCESS); }