git: f250ff5ff309 - main - mixer(8): Improve shorthand volume parsing.
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Date: Sun, 20 Mar 2022 19:21:46 UTC
The branch main has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=f250ff5ff3094abd5570df61fbe4d2c37e3624a9 commit f250ff5ff3094abd5570df61fbe4d2c37e3624a9 Author: Hans Petter Selasky <hselasky@FreeBSD.org> AuthorDate: 2022-03-20 19:08:13 +0000 Commit: Hans Petter Selasky <hselasky@FreeBSD.org> CommitDate: 2022-03-20 19:19:16 +0000 mixer(8): Improve shorthand volume parsing. The initial patch had a bug where the full volume syntax, floating point values, :, + and -, wasn't accepted. While at it move some defines to enum's. Fixes: da3d4469ef841be44ac4b346a6b51668d608ed49 Submitted by: christos@ Differential Revision: https://reviews.freebsd.org/D34617 Sponsored by: NVIDIA Networking --- usr.sbin/mixer/mixer.c | 44 ++++++++++++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 14 deletions(-) diff --git a/usr.sbin/mixer/mixer.c b/usr.sbin/mixer/mixer.c index f3a8d9aaa92a..c0a9ec25c6fa 100644 --- a/usr.sbin/mixer/mixer.c +++ b/usr.sbin/mixer/mixer.c @@ -30,9 +30,11 @@ #include <string.h> #include <unistd.h> -#define C_VOL 0 -#define C_MUT 1 -#define C_SRC 2 +enum { + C_VOL = 0, + C_MUT, + C_SRC, +}; static void usage(void) __dead2; static void initctls(struct mixer *); @@ -64,7 +66,7 @@ main(int argc, char *argv[]) mix_ctl_t *cp; char *name = NULL, buf[NAME_MAX]; char *p, *q, *devstr, *ctlstr, *valstr = NULL; - int dunit, i, n, pall = 1; + int dunit, i, n, pall = 1, shorthand; int aflag = 0, dflag = 0, oflag = 0, sflag = 0; int ch; @@ -135,6 +137,19 @@ parse: while (argc > 0) { if ((p = strdup(*argv)) == NULL) err(1, "strdup(%s)", *argv); + + /* Check if we're using the shorthand syntax for volume setting. */ + shorthand = 0; + for (q = p; *q != '\0'; q++) { + if (*q == '=') { + q++; + shorthand = ((*q >= '0' && *q <= '9') || + *q == '+' || *q == '-' || *q == '.'); + break; + } else if (*q == '.') + break; + } + /* Split the string into device, control and value. */ devstr = strsep(&p, ".="); if ((m->dev = mixer_get_dev_byname(m, devstr)) == NULL) { @@ -146,22 +161,23 @@ parse: printdev(m, 1); pall = 0; goto next; - } else { - for (q = p; (*q >= '0' && *q <= '9') || *q == '.'; q++) - ; /* nothing */ - /* Input: `dev=N` -> shorthand for `dev.volume=N`. */ - if (*q == '\0') { - cp = mixer_get_ctl(m->dev, C_VOL); - cp->mod(cp->parent_dev, p); - goto next; - } + } else if (shorthand) { + /* + * Input: `dev=N` -> shorthand for `dev.volume=N`. + * + * We don't care what the rest of the string contains as + * long as we're sure the very beginning is right, + * mod_volume() will take care of parsing it properly. + */ + cp = mixer_get_ctl(m->dev, C_VOL); + cp->mod(cp->parent_dev, p); + goto next; } ctlstr = strsep(&p, "="); if ((cp = mixer_get_ctl_byname(m->dev, ctlstr)) == NULL) { warnx("%s.%s: no such control", devstr, ctlstr); goto next; } - /* Input: `dev.control`. */ if (p == NULL) { (void)cp->print(cp->parent_dev, cp->name);