diff options
Diffstat (limited to 'parser.y')
| -rw-r--r-- | parser.y | 117 |
1 files changed, 82 insertions, 35 deletions
@@ -21,7 +21,8 @@ /* parser reads these */ -char *rcfile = NULL; /* path name of dot file */ + +static const char *rcfile = NULL; /* path name of dot file */ /* parser sets these */ int yydebug; /* in case we didn't generate with -- debug */ @@ -96,53 +97,99 @@ extern int lineno; extern char *yytext; extern FILE *yyin; +/** + * Report a syntax error. + */ void yyerror (const char *s) -/* report a syntax error */ { fprintf(stderr, "%s:%d: %s at %s\n", rcfile, lineno, s, (yytext && yytext[0]) ? yytext : "end of input"); exit(EX_CONFIG); } -#define RCFILE ".esmtprc" +#define RCFILE "esmtprc" +#define DOT_RCFILE "." RCFILE +#define ETC_RCFILE "/etc/" RCFILE -void parse_rcfile (void) +void rcfile_parse(const char *_rcfile) { - if(!rcfile) - { - char *home; - - /* Setup the rcfile name. */ - if (!(home = getenv("HOME"))) - return; - - if (!(rcfile = malloc(strlen(home) + strlen(RCFILE) + 2))) - return; - - strcpy(rcfile, home); - if (rcfile[strlen(rcfile) - 1] != '/') - strcat(rcfile, "/"); - strcat(rcfile, RCFILE); - } - - identity = default_identity; - - /* Open the configuration file and feed it to the lexer. */ - if (!(yyin = fopen(rcfile, "r"))) - { - if (errno != ENOENT) + char *temp = NULL; + + if(_rcfile) { - fprintf(stderr, "open: %s: %s\n", rcfile, strerror(errno)); + /* Configuration file specified on the command line */ + if(!(yyin = fopen(_rcfile, "r"))) + goto failure; + + rcfile = _rcfile; + goto success; } - } - else - { - yyparse(); /* parse entire file */ + + /* Search for the user configuration file */ + do + { + char *home; + + if (!(home = getenv("HOME"))) + break; + + temp = xmalloc(strlen(home) + strlen(DOT_RCFILE) + 2); + + strcpy(temp, home); + if (temp[strlen(temp) - 1] != '/') + strcat(temp, "/"); + strcat(temp, DOT_RCFILE); + + if(!(yyin = fopen(temp, "r"))) + { + if(errno == ENOENT) + break; + else + goto failure; + } + + rcfile = temp; + goto success; + } + while(0); + + /* Search for the global configuration file */ + do { + if(!(yyin = fopen(ETC_RCFILE, "r"))) + { + if(errno == ENOENT) + break; + else + goto failure; + } + + rcfile = ETC_RCFILE; + goto success; + } + while(0); + + /* No configuration file found */ + return; + +success: + /* Configuration file opened */ + + identity = default_identity; + + yyparse(); /* parse entire file */ fclose(yyin); /* not checking this should be safe, file mode was r */ - } - - free(rcfile); + + rcfile = NULL; + if(temp) + free(temp); + + return; + +failure: + /* Failure to open the configuration file */ + fprintf(stderr, "open: %s: %s\n", rcfile, strerror(errno)); + exit(EX_CONFIG); } /* easier to do this than cope with variations in where the library lives */ |