Add error control to iofile - st - simple terminal
HTML git clone https://git.parazyd.org/st
DIR Log
DIR Files
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DIR README
DIR LICENSE
---
DIR commit ee3fbeb6c8c354cf4db226a5b1583c531ea37af4
DIR parent 2e38ab7afdc56e3853751918f1b7705362bea01c
HTML Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date: Sun, 28 Oct 2012 06:27:42 +0100
Add error control to iofile
write can write less bytes than we request, so it is necessary check the
return value, in case of error print a message and don't continnue writing
in the file.
---
st.c | 39 ++++++++++++++++++++++++++++++---------
1 file changed, 30 insertions(+), 9 deletions(-)
Diffstat:
M st.c | 39 ++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 9 deletions(-)
---
DIR diff --git a/st.c b/st.c
@@ -340,6 +340,7 @@ static int utf8encode(long *, char *);
static int utf8size(char *);
static int isfullutf8(char *, int);
+static ssize_t xwrite(int, char *, size_t);
static void *xmalloc(size_t);
static void *xrealloc(void *, size_t);
static void *xcalloc(size_t nmemb, size_t size);
@@ -379,6 +380,21 @@ static char *opt_embed = NULL;
static char *opt_class = NULL;
static char *opt_font = NULL;
+
+ssize_t
+xwrite(int fd, char *s, size_t len) {
+ size_t aux = len;
+
+ while(len > 0) {
+ ssize_t r = write(fd, s, len);
+ if(r < 0)
+ return r;
+ len -= r;
+ s += r;
+ }
+ return aux;
+}
+
void *
xmalloc(size_t len) {
void *p = malloc(len);
@@ -926,13 +942,12 @@ ttynew(void) {
cmdfd = m;
signal(SIGCHLD, sigchld);
if(opt_io) {
- if(!strcmp(opt_io, "-")) {
- iofd = STDOUT_FILENO;
- } else {
- if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
- fprintf(stderr, "Error opening %s:%s\n",
- opt_io, strerror(errno));
- }
+ iofd = (!strcmp(opt_io, "-")) ?
+ STDOUT_FILENO :
+ open(opt_io, O_WRONLY | O_CREAT, 0666);
+ if(iofd < 0) {
+ fprintf(stderr, "Error opening %s:%s\n",
+ opt_io, strerror(errno));
}
}
}
@@ -1793,8 +1808,14 @@ tputc(char *c, int len) {
uchar ascii = *c;
bool control = ascii < '\x20' || ascii == 0177;
- if(iofd != -1)
- write(iofd, c, len);
+ if(iofd != -1) {
+ if (xwrite(iofd, c, len) < 0) {
+ fprintf(stderr, "Error writting in %s:%s\n",
+ opt_io, strerror(errno));
+ close(iofd);
+ iofd = -1;
+ }
+ }
/*
* STR sequences must be checked before of anything
* because it can use some control codes as part of the sequence