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(fname): New.

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(doredir): Use it.  Check whether argument starts with '>'.  Simplify
convoluted logic.  Improve error messages.  Check value of fdopen().
This commit is contained in:
Markus Armbruster 2007-11-17 09:08:57 +00:00
parent d01aa85577
commit 17d6997d4e
1 changed files with 40 additions and 29 deletions
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63
src/client/servcmd.c
View file

@ -36,6 +36,7 @@
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
@ -165,14 +166,23 @@ prompt(FILE *auxfi)
}
}
static char *
fname(char *s)
{
char *beg, *end;
for (beg = s; isspace(*(unsigned char *)beg); beg++) ;
for (end = beg; !isspace(*(unsigned char *)end); end++) ;
*end = 0;
return beg;
}
/*
* opens redir_fp if successful
*/
static void
doredir(char *p)
{
char *how;
char *name;
char *tag;
int mode;
int fd;
@ -181,40 +191,41 @@ doredir(char *p)
(void)fclose(redir_fp);
redir_fp = NULL;
}
how = p++;
if (*p && ((*p == '>') || (*p == '!')))
if (*p++ != '>') {
fprintf(stderr, "WARNING! Weird redirection %s", p);
return;
}
mode = O_WRONLY | O_CREAT;
if (*p == '>') {
mode |= O_APPEND;
p++;
} else if (*p == '!') {
mode |= O_TRUNC;
p++;
} else
mode |= O_EXCL;
tag = gettag(p);
while (*p && isspace(*p))
p++;
name = p;
while (*p && !isspace(*p))
p++;
*p = 0;
p = fname(p);
if (tag == NULL) {
fprintf(stderr, "WARNING! Server redirected output to file %s\n",
name);
p);
return;
}
mode = O_WRONLY | O_CREAT;
if (how[1] == '>')
mode |= O_APPEND;
else if (how[1] == '!')
mode |= O_TRUNC;
else
mode |= O_EXCL;
if (*name == 0) {
fprintf(stderr, "Null file name after redirect\n");
free(tag);
if (*p == 0) {
fprintf(stderr, "Redirection lacks a file name\n");
return;
}
if ((fd = open(name, mode, 0600)) < 0) {
fprintf(stderr, "Redirect open failed\n");
perror(name);
} else {
redir_fp = fdopen(fd, "w");
fd = open(p, mode, 0600);
redir_fp = fd < 0 ? NULL : fdopen(fd, "w");
if (!redir_fp) {
fprintf(stderr, "Can't redirect to %s: %s\n",
p, strerror(errno));
}
free(tag);
}
/*