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Make file-existence test a per-platform function.

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NFC in this commit, but this will allow me to do something more subtle
and OS-specific in each OS's implementation of it.
This commit is contained in:
Simon Tatham 2018-02-07 07:22:18 +00:00
parent 36764ffbbe
commit bbebdc8280
4 changed files with 24 additions and 4 deletions
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5
logging.c
View File

@ -164,7 +164,6 @@ void logfopen(void *handle)
{
struct LogContext *ctx = (struct LogContext *)handle;
struct tm tm;
FILE *fp;
int mode;
/* Prevent repeat calls */
@ -184,10 +183,8 @@ void logfopen(void *handle)
conf_get_str(ctx->conf, CONF_host),
conf_get_int(ctx->conf, CONF_port), &tm);
fp = f_open(ctx->currlogfilename, "r", FALSE); /* file already present? */
if (fp) {
if (open_for_write_would_lose_data(ctx->currlogfilename)) {
int logxfovr = conf_get_int(ctx->conf, CONF_logxfovr);
fclose(fp);
if (logxfovr != LGXF_ASK) {
mode = ((logxfovr == LGXF_OVR) ? 2 : 1);
} else

1
putty.h
View File

@ -1467,6 +1467,7 @@ Filename *filename_deserialise(void *data, int maxsize, int *used);
char *get_username(void); /* return value needs freeing */
char *get_random_data(int bytes, const char *device); /* used in cmdgen.c */
char filename_char_sanitise(char c); /* rewrite special pathname chars */
int open_for_write_would_lose_data(const Filename *fn);
/*
* Exports and imports from timing.c.

11
unix/uxmisc.c
View File

@ -349,3 +349,14 @@ char *make_dir_path(const char *path, mode_t mode)
pos += strspn(path + pos, "/");
}
}
int open_for_write_would_lose_data(const Filename *fn)
{
FILE *fp;
if ((fp = f_open(fn, "r", FALSE)) != NULL) {
fclose(fp);
return TRUE;
} else {
return FALSE;
}
}

11
windows/winmisc.c
View File

@ -587,3 +587,14 @@ FontSpec *fontspec_deserialise(void *vdata, int maxsize, int *used)
GET_32BIT_MSB_FIRST(end + 4),
GET_32BIT_MSB_FIRST(end + 8));
}
int open_for_write_would_lose_data(const Filename *fn)
{
FILE *fp;
if ((fp = f_open(fn, "r", FALSE)) != NULL) {
fclose(fp);
return TRUE;
} else {
return FALSE;
}
}