Read filenames from stdin

Makefile

@@ -1,6 +1,6 @@
 all: sxiv
 
-VERSION=git-20110209
+VERSION=git-20110214
 
 CC?=gcc
 PREFIX?=/usr/local

main.c

@@ -81,23 +81,30 @@ int main(int argc, char **argv) {
 		exit(1);
 	}
 
-	if (options->recursive)
+	if (options->recursive || options->from_stdin)
 		filecnt = FNAME_CNT;
 	else
 		filecnt = options->filecnt;
 
 	filenames = (const char**) s_malloc(filecnt * sizeof(const char*));
 	fileidx = 0;
 
-	for (i = 0; i < options->filecnt; ++i) {
-		filename = options->filenames[i];
-		if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
-			if (options->recursive)
-				read_dir_rec(filename);
-			else
-				warn("ignoring directory: %s", filename);
-		} else {
-			check_append(filename);
+	if (options->from_stdin) {
+		while ((filename = readline(stdin))) {
+			if (!check_append(filename))
+				free((void*) filename);
+		}
+	} else {
+		for (i = 0; i < options->filecnt; ++i) {
+			filename = options->filenames[i];
+			if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
+				if (options->recursive)
+					read_dir_rec(filename);
+				else
+					warn("ignoring directory: %s", filename);
+			} else {
+				check_append(filename);
+			}
 		}
 	}
 

options.c

@@ -19,6 +19,7 @@
 #define _XOPEN_SOURCE
 
 #include <stdlib.h>
+#include <string.h>
 #include <stdio.h>
 #include <unistd.h>
 
@@ -106,4 +107,6 @@ void parse_options(int argc, char **argv) {
 
 	_options.filenames = (const char**) argv + optind;
 	_options.filecnt = argc - optind;
+	_options.from_stdin = _options.filecnt == 1 &&
+	                      strcmp(_options.filenames[0], "-") == 0;
 }

options.h

@@ -24,6 +24,7 @@
 typedef struct options_s {
 	const char **filenames;
 	int filecnt;
+	unsigned char from_stdin;
 
 	scalemode_t scalemode;
 	float zoom;

util.c

@@ -17,11 +17,13 @@
  */
 
 #include <stdlib.h>
-#include <stdio.h>
+#include <string.h>
 
 #include "options.h"
 #include "util.h"
 
+#define FNAME_LEN 10
+
 void cleanup();
 
 void* s_malloc(size_t size) {
@@ -75,3 +77,39 @@ void size_readable(float *size, const char **unit) {
 		*size /= 1024;
 	*unit = units[MIN(i, LEN(units) - 1)];
 }
+
+char* readline(FILE *stream) {
+	size_t len;
+	char *buf, *s, *end;
+
+	if (!stream || feof(stream) || ferror(stream))
+		return NULL;
+
+	len = FNAME_LEN;
+	s = buf = (char*) s_malloc(len * sizeof(char));
+
+	do {
+		*s = '\0';
+		fgets(s, len - (s - buf), stream);
+		if ((end = strchr(s, '\n'))) {
+			*end = '\0';
+		} else if (strlen(s) + 1 == len - (s - buf)) {
+			buf = (char*) s_realloc(buf, 2 * len * sizeof(char));
+			s = buf + len - 1;
+			len *= 2;
+		} else {
+			s += strlen(s);
+		}
+	} while (!end && !feof(stream) && !ferror(stream));
+
+	if (!ferror(stream) && *buf) {
+		s = (char*) s_malloc((strlen(buf) + 1) * sizeof(char));
+		strcpy(s, buf);
+	} else {
+		s = NULL;
+	}
+
+	free(buf);
+
+	return s;
+}

util.h

@@ -19,6 +19,7 @@
 #ifndef UTIL_H
 #define UTIL_H
 
+#include <stdio.h>
 #include <stdarg.h>
 
 #define ABS(a)   ((a) < 0 ? (-(a)) : (a))
@@ -34,4 +35,6 @@ void die(const char*, ...);
 
 void size_readable(float*, const char**);
 
+char* readline(FILE*);
+
 #endif /* UTIL_H */