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swaynag: do error checking and rename read_from_stdin

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read_from_stdin not only read from stdin, but trimming trailing
newlines, so rename it to reflect this.
This commit is contained in:
Nihal Jere 2022-03-17 13:00:08 -05:00 committed by Simon Ser
parent a7898637de
commit 5d924f2b12
1 changed files with 23 additions and 11 deletions
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34
swaynag/config.c
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@ -11,28 +11,40 @@
#include "util.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
static char *read_from_stdin(void) {
char *buffer = NULL;
size_t buffer_len = 0;
char *line = NULL;
size_t line_size = 0;
ssize_t nread;
while ((nread = getline(&line, &line_size, stdin)) != -1) {
static char *read_and_trim_stdin(void) {
char *buffer = NULL, *line = NULL;
size_t buffer_len = 0, line_size = 0;
while (1) {
ssize_t nread = getline(&line, &line_size, stdin);
if (nread == -1) {
if (feof(stdin)) {
break;
} else {
perror("getline");
goto freeline;
}
}
buffer = realloc(buffer, buffer_len + nread + 1);
if (!buffer) {
perror("realloc");
return NULL;
goto freebuf;
}
snprintf(&buffer[buffer_len], nread + 1, "%s", line);
memcpy(&buffer[buffer_len], line, nread + 1);
buffer_len += nread;
}
free(line);
while (buffer && buffer[buffer_len - 1] == '\n') {
while (buffer_len && buffer[buffer_len - 1] == '\n') {
buffer[--buffer_len] = '\0';
}
return buffer;
freeline:
free(line);
freebuf:
free(buffer);
return NULL;
}
int swaynag_parse_options(int argc, char **argv, struct swaynag *swaynag,
@ -222,7 +234,7 @@ int swaynag_parse_options(int argc, char **argv, struct swaynag *swaynag,
case 'l': // Detailed Message
if (swaynag) {
free(swaynag->details.message);
swaynag->details.message = read_from_stdin();
swaynag->details.message = read_and_trim_stdin();
if (!swaynag->details.message) {
return EXIT_FAILURE;
}