From 54ef13bf75a7a1e787716ce395ffe847fa74673f Mon Sep 17 00:00:00 2001 From: Ivo Timmermans Date: Wed, 29 Nov 2000 14:24:40 +0000 Subject: [PATCH] Implemented a readline() function that will read an entire line into a dynamically allocated buffer; Ask for a file name in ask_and_safe_open(). --- src/conf.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++------ src/conf.h | 3 +- src/tincd.c | 6 ++-- 3 files changed, 96 insertions(+), 14 deletions(-) diff --git a/src/conf.c b/src/conf.c index 37bfe94..7399c82 100644 --- a/src/conf.c +++ b/src/conf.c @@ -19,7 +19,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: conf.c,v 1.9.4.23 2000/11/28 23:12:56 zarq Exp $ + $Id: conf.c,v 1.9.4.24 2000/11/29 14:24:40 zarq Exp $ */ #include "config.h" @@ -38,7 +38,6 @@ #include "conf.h" #include "netutl.h" /* for strtoip */ -#include "config.h" #include "system.h" config_t *config = NULL; @@ -130,6 +129,66 @@ cp } } +/* + Read exactly one line and strip the trailing newline if any. If the + file was on EOF, return NULL. Otherwise, return all the data in a + dynamically allocated buffer. +*/ +char *readline(FILE *fp) +{ + char *newline = NULL; + char *p; + char *line; /* The array that contains everything that has been read + so far */ + char *idx; /* Read into this pointer, which points to an offset + within line */ + size_t size, newsize; /* The size of the current array pointed to by + line */ + size_t maxlen; /* Maximum number of characters that may be read with + fgets. This is newsize - oldsize. */ + + if(feof(fp)) + return NULL; + + size = 100; + maxlen = size; + line = xmalloc(size); + idx = line; + for(;;) + { + errno = 0; + p = fgets(idx, maxlen, fp); + if(p == NULL) /* EOF or error */ + { + if(feof(fp)) + break; + + /* otherwise: error; let the calling function print an error + message if applicable */ + free(line); + return NULL; + } + + newline = strchr(p, '\n'); + if(newline == NULL) + /* We haven't yet read everything to the end of the line */ + { + newsize = size << 1; + line = xrealloc(line, newsize); + idx = &line[size - 1]; + maxlen = newsize - size + 1; + size = newsize; + } + else + { + *newline = '\0'; /* kill newline */ + break; /* yay */ + } + } + + return line; +} + /* Parse a configuration file and put the results in the configuration tree starting at *base. @@ -258,28 +317,49 @@ cp #define is_safe_file(p) 1 -FILE *ask_and_safe_open(const char* filename) +FILE *ask_and_safe_open(const char* filename, const char* what) { FILE *r; char *directory; char *fn; int len; - if(!isatty(0)) + /* Check stdin and stdout */ + if(!isatty(0) || !isatty(1)) { /* Argh, they are running us from a script or something. Write the files to the current directory and let them burn in hell for ever. */ - directory = "."; /* get_current_directory */ + fn = xstrdup(filename); } else { - directory = "."; + /* Ask for a file and/or directory name. */ + fprintf(stdout, _("Please enter a file to save %s to [%s]: "), + what, filename); + fflush(stdout); /* Don't wait for a newline */ + if((fn = readline(stdin)) == NULL) + { + fprintf(stderr, _("Error while reading stdin: %m\n")); + return NULL; + } + if(strlen(fn) == 0) + /* User just pressed enter. */ + fn = xstrdup(filename); } - len = strlen(filename) + strlen(directory) + 2; /* 1 for the / */ - fn = xmalloc(len); - snprintf(fn, len, "%s/%s", directory, filename); + if((strchr(fn, '/') == NULL) || (fn[0] != '/')) + { + /* The directory is a relative path or a filename. */ + char *p; + + directory = get_current_dir_name(); + len = strlen(fn) + strlen(directory) + 2; /* 1 for the / */ + p = xmalloc(len); + snprintf(p, len, "%s/%s", directory, fn); + free(fn); + fn = p; + } if(!is_safe_file(fn)) { @@ -291,11 +371,12 @@ FILE *ask_and_safe_open(const char* filename) if((r = fopen(fn, "w")) == NULL) { - fprintf(stderr, _("Error opening file `%s': %m"), + fprintf(stderr, _("Error opening file `%s': %m\n"), fn); } free(fn); + free(directory); return r; } diff --git a/src/conf.h b/src/conf.h index 9ab0add..297dc42 100644 --- a/src/conf.h +++ b/src/conf.h @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: conf.h,v 1.6.4.16 2000/11/04 22:57:30 guus Exp $ + $Id: conf.h,v 1.6.4.17 2000/11/29 14:24:40 zarq Exp $ */ #ifndef __TINC_CONF_H__ @@ -96,5 +96,6 @@ extern int read_config_file(config_t **, const char *); extern const config_t *get_config_val(config_t *, which_t type); extern void clear_config(); extern int read_server_config(void); +extern FILE *ask_and_safe_open(const char*, const char*); #endif /* __TINC_CONF_H__ */ diff --git a/src/tincd.c b/src/tincd.c index 7a65aad..77e52c0 100644 --- a/src/tincd.c +++ b/src/tincd.c @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: tincd.c,v 1.10.4.36 2000/11/28 23:12:57 zarq Exp $ + $Id: tincd.c,v 1.10.4.37 2000/11/29 14:24:40 zarq Exp $ */ #include "config.h" @@ -236,12 +236,12 @@ int keygen(int bits) else fprintf(stderr, _("Done.\n")); - if((f = ask_and_safe_open("rsa_key.pub")) == NULL) + if((f = ask_and_safe_open("rsa_key.pub", _("public RSA key"))) == NULL) return -1; PEM_write_RSAPublicKey(f, rsa_key); fclose(f); - if((f = ask_and_safe_open("rsa_key.priv")) == NULL) + if((f = ask_and_safe_open("rsa_key.priv", _("private RSA key"))) == NULL) return -1; PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); fclose(f); -- 2.25.1