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libefi: efi_get_devname: don't allocate procfs path
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #12048
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@ -218,22 +218,15 @@ read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
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static char *
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efi_get_devname(int fd)
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{
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char *path;
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char *dev_name;
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path = calloc(1, PATH_MAX);
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if (path == NULL)
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return (NULL);
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char path[32];
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/*
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* The libefi API only provides the open fd and not the file path.
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* To handle this realpath(3) is used to resolve the block device
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* name from /proc/self/fd/<fd>.
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*/
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(void) sprintf(path, "/proc/self/fd/%d", fd);
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dev_name = realpath(path, NULL);
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free(path);
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return (dev_name);
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(void) snprintf(path, sizeof (path), "/proc/self/fd/%d", fd);
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return (realpath(path, NULL));
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}
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static int
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