diff options
| -rw-r--r-- | tput.c | 95 |
1 files changed, 95 insertions, 0 deletions
@@ -0,0 +1,95 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define EXIT_USAGE_ERROR 2 +#define EXIT_UNKNOWN_TERMINAL 3 +#define EXIT_INVALID_OPERAND 4 +#define DEFAULT_TERMINAL "ECMA-48" + +void +usage(const char *argv0, int status) +{ + printf("Usage: %s [-T type] <clear | init | reset>...\n", argv0); + exit(status); +} + +void +clear(const char *term) +{ + if (!strcmp(term, "ECMA-48")) { + /* ESC[0;0;\x48 : Move cursor to 0,0 */ + /* ESC[\x4a : Erase to end of page */ + printf("\033[0;0;\x48\033[\x4a"); + } else { + exit(EXIT_UNKNOWN_TERMINAL); + } +} + +void +reset(const char *term) +{ + if (!strcmp(term, "ECMA-48")) { + /* This may or may not be right */ + printf("\033[\x63"); + } else { + exit(EXIT_UNKNOWN_TERMINAL); + } +} + +void +init(const char *term) +{ + if (!strcmp(term, "ECMA-48")) { + /* I don't know */ + } else { + exit(EXIT_UNKNOWN_TERMINAL); + } +} + +int +main(int argc, char **argv) +{ + char *term = NULL, c; + while ((c = getopt(argc, argv, "T:")) != -1) { + switch (c) { + case 'T': + /* :type Specifies the terminal type. + If not specified, the environment variable TERM + will be used. If TERM is NULL or not set, an + unspecified default will be used. + On UNG, the default is ECMA-48. */ + term = optarg; + break; + default: + usage(argv[0], EXIT_USAGE_ERROR); + } + } + + if (optind > argc) { + usage(argv[0], EXIT_USAGE_ERROR); + } + + if (term == NULL) { + term = getenv("TERM"); + if (term == NULL) { + term = DEFAULT_TERMINAL; + } + } + + while (argv[optind]) { + if (!strcmp(argv[optind], "clear")) { + clear(term); + } else if (!strcmp(argv[optind], "init")) { + init(term); + } else if (!strcmp(argv[optind], "reset")) { + reset(term); + } else { + usage(argv[0], EXIT_INVALID_OPERAND); + } + optind++; + } + + return 0; +} |