cmdutils: Rename read_file to cmdutils_read_file

This symbol name clashes with a symbol in gnutls, if linking
statically to that library.
Signed-off-by: Martin Storsjö <martin@martin.st>

avconv.c

@@ -2178,7 +2178,7 @@ static int transcode_init(OutputFile *output_files,
                 } else {
                     char  *logbuffer;
                     size_t logbuffer_size;
-                    if (read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
+                    if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
                         av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
                                logfilename);
                         exit_program(1);

cmdutils.c

@@ -785,7 +785,7 @@ int read_yesno(void)
     return yesno;
 }
 
-int read_file(const char *filename, char **bufptr, size_t *size)
+int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
 {
     int ret;
     FILE *f = fopen(filename, "rb");

cmdutils.h

@@ -309,7 +309,7 @@ int read_yesno(void);
  * @return 0 in case of success, a negative value corresponding to an
  * AVERROR error code in case of failure.
  */
-int read_file(const char *filename, char **bufptr, size_t *size);
+int cmdutils_read_file(const char *filename, char **bufptr, size_t *size);
 
 typedef struct {
     int64_t num_faulty_pts; /// Number of incorrect PTS values so far

ffmpeg.c

@@ -2276,7 +2276,7 @@ static int transcode(AVFormatContext **output_files,
                 } else {
                     char  *logbuffer;
                     size_t logbuffer_size;
-                    if (read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
+                    if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
                         fprintf(stderr, "Error reading log file '%s' for pass-2 encoding\n", logfilename);
                         exit_program(1);
                     }