diff options
Diffstat (limited to 'src/bin/psql/sprompt.c')
-rw-r--r-- | src/bin/psql/sprompt.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/bin/psql/sprompt.c b/src/bin/psql/sprompt.c new file mode 100644 index 00000000000..c9c2ab5cfc1 --- /dev/null +++ b/src/bin/psql/sprompt.c @@ -0,0 +1,121 @@ +/* + * psql - the PostgreSQL interactive terminal + * + * Copyright 2000 by PostgreSQL Global Development Group + * + * $Header: /cvsroot/pgsql/src/bin/psql/Attic/sprompt.c,v 1.1 2002/07/06 20:12:30 momjian Exp $ + */ + +/* + * simple_prompt + * + * Generalized function especially intended for reading in usernames and + * password interactively. Reads from /dev/tty or stdin/stderr. + * + * prompt: The prompt to print + * maxlen: How many characters to accept + * echo: Set to false if you want to hide what is entered (for passwords) + * + * Returns a malloc()'ed string with the input (w/o trailing newline). + */ +#include "postgres_fe.h" + +#ifdef HAVE_TERMIOS_H +#include <termios.h> +#endif + +bool prompt_state = false; +extern char *simple_prompt(const char *prompt, int maxlen, bool echo); + +char * +simple_prompt(const char *prompt, int maxlen, bool echo) +{ + int length; + char *destination; + FILE *termin, + *termout; + +#ifdef HAVE_TERMIOS_H + struct termios t_orig, + t; +#endif + + destination = (char *) malloc(maxlen + 2); + if (!destination) + return NULL; + + prompt_state = true; /* disable SIGINT */ + + /* + * Do not try to collapse these into one "w+" mode file. Doesn't work + * on some platforms (eg, HPUX 10.20). + */ + termin = fopen("/dev/tty", "r"); + termout = fopen("/dev/tty", "w"); + if (!termin || !termout) + { + if (termin) + fclose(termin); + if (termout) + fclose(termout); + termin = stdin; + termout = stderr; + } + +#ifdef HAVE_TERMIOS_H + if (!echo) + { + tcgetattr(fileno(termin), &t); + t_orig = t; + t.c_lflag &= ~ECHO; + tcsetattr(fileno(termin), TCSAFLUSH, &t); + } +#endif + + if (prompt) + { + fputs(gettext(prompt), termout); + fflush(termout); + } + + if (fgets(destination, maxlen, termin) == NULL) + destination[0] = '\0'; + + length = strlen(destination); + if (length > 0 && destination[length - 1] != '\n') + { + /* eat rest of the line */ + char buf[128]; + int buflen; + + do + { + if (fgets(buf, sizeof(buf), termin) == NULL) + break; + buflen = strlen(buf); + } while (buflen > 0 && buf[buflen - 1] != '\n'); + } + + if (length > 0 && destination[length - 1] == '\n') + /* remove trailing newline */ + destination[length - 1] = '\0'; + +#ifdef HAVE_TERMIOS_H + if (!echo) + { + tcsetattr(fileno(termin), TCSAFLUSH, &t_orig); + fputs("\n", termout); + fflush(termout); + } +#endif + + if (termin != stdin) + { + fclose(termin); + fclose(termout); + } + + prompt_state = false; /* SIGINT okay again */ + + return destination; +} |