diff options
Diffstat (limited to 'components/volume.c')
| -rw-r--r-- | components/volume.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/components/volume.c b/components/volume.c index ec653a2..4c9a6ac 100644 --- a/components/volume.c +++ b/components/volume.c @@ -1,5 +1,6 @@ /* See LICENSE file for copyright and license details. */ #if defined(__linux__) +#include <errno.h> #include <fcntl.h> #include <sys/soundcard.h> #include <sys/ioctl.h> @@ -18,19 +19,19 @@ vol_perc(const char *card) afd = open(card, O_RDONLY | O_NONBLOCK); if (afd == -1) { - fprintf(stderr, "Cannot open %s", card); + fprintf(stderr, "open '%s': %s\n", card, strerror(errno)); return NULL; } if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) { - fprintf(stderr, "Cannot get volume for %s", card); + fprintf(stderr, "ioctl 'SOUND_MIXER_READ_DEVMASK': %s\n", strerror(errno)); close(afd); return NULL; } for (i = 0; i < LEN(vnames); i++) { if (devmask & (1 << i) && !strcmp("vol", vnames[i])) { if (ioctl(afd, MIXER_READ(i), &v) == -1) { - fprintf(stderr, "vol_perc: ioctl"); + fprintf(stderr, "ioctl 'MIXER_READ(%d)': %s\n", i, strerror(errno)); close(afd); return NULL; } |